FAA Approved Ball Bearings
Content
Aerospace Bearing Part Numbering Guide
Timken
FAA-TSO C-149
2
Table of Contents
Introduction ............................................................................................................................ 3
Miniature and Instrument Aircraft Bearing Classification .......................................... 4
Thin-Section and Torque-Tube Aircraft Bearing Classification .................................. 6
Miniature and Thin-Section Nomenclature......................................................................8
Bearing Family 1
Deep-groove, radial-retainer, inch and metric design................................................. 11
Bearing Family 2
Angular-contact, non-separable ..................................................................................... 14
Bearing Family 3
Angular-contact, separable .............................................................................................. 17
Bearing Family 4
Deep-groove, full-complement ........................................................................................ 19
Bearing Family 5
Deep-groove, radial-retainer, narrow series ................................................................ 21
Bearing Family 6
Deep-groove, radial-retainer, modified dimension ...................................................... 23
Bearing Family 7
Thin-section/torque-tube, Conrad series ...................................................................... 25
Bearing Family 8
Thin-section/torque-tube, angular-contact series ...................................................... 28
Bearing Family 9
Thin-section/torque-tube, fractured-race series ........................................................ 31
Appendix ............................................................................................................................... 33
3
Introduction
This part number guide is designed to help you identify and specify Timken
bearings available under the Federal Aviation Administration (FAA) Technical
Standard Order (TSO) C-149. This often is a replacement for an original part. By following
the steps within this guide, you may determine a suitable bearing for your specific
application. As always, your Timken sales engineer is only a phone call away.
Warning
Failure to observe the following warnings could
create a risk of death or serious injury.
Proper maintenance and handling practices are critical.
Always follow installation instructions and
maintain proper lubrication.
4
Miniature and Instrument Aircraft Bearing Classification
Fig. I. FAA approval letter – families 1-6.
Miniature- and instrument-type aircraft bearings are divided into six families in this
guide. Specific part number, boundary dimension, design properties and performance
properties for each family are defined in the tables. To begin specification of a part,
determining the appropriate family by visual identification or typical application is
helpful.
Family 1 – Deep-groove, radial-retainer, inch and metric design
Family 2 – Angular-contact, non-separable
Family 3 – Angular-contact, separable
Family 4 – Deep-groove, full-complement
Family 5 – Deep-groove, radial-retainer, narrow series
Family 6 – Deep-groove, radial-retainer, modified dimension
5
Family 1
Family 2
Family 3
Family 4
Family 5
Family 6
Fig. II. Miniature and instrument bearing family visual identification.
table I. Miniature and instrument typical applications
Typical Applications
Air data sensor
Family
1
Family
2
X
APU intake door actuator
Family
3
Family
4
Family
5
Family
6
Note
X
X
X
X
Control column stall warning shaker
X
X
Controller mechanism
X
X
Differential assembly servo
X
X
Elec. mech. rotary actuator flow meter
X
X
Front angle of attack synchro
X
X
Fuel control
X
X
Fuel control comp. discharge
X
X
Fuel control comp. discharge press sensor
X
X
Fuel flow indicator
X
X
Fuel flow transmitter
X
Gear train assembly servo
X
General aviation directional & attitude gyros
X
Horizon situation indicator (HIS)
X
X
X
X
X
X
X
Lift transducer
X
X
Mech. assembly inlet TX
X
X
Overboard air exhaust valve
X
X
Power failure detector motor press sensor
X
Pressure outflow control valve
X
X
X
X
Receiver synchro
X
X
Servo
X
X
Rate gyro
X
X
Tachometer motor
X
Vertical gyro
X
X
X
Note: Components often fall into multiple families, and some may not be listed here. If your component does not appear to match a typical family or appears
visually different, contact your Timken sales engineer for assistance.
6
Thin-Section and Torque-Tube Instrument Classification
Fig. III. FAA approval letter – families 7-9.
Thin-section and torque-tube instrument ball-type aircraft bearings are divided into
three families in this drawing. Specific part number, boundary dimension, design
properties and performance properties for each family are defined in the drawing
supplements. To begin specification of a part, determining the appropriate family by
visual identification or typical application is required.
Family 7 – Thin-section/torque-tube, Conrad series
Family 8 – Thin-section/torque-tube, angular-contact series
Family 9 – Thin-section/torque-tube, fractured-race series
Family 7
Family 8
Family 9
Fig. IV. Thin-section and torque-tube bearing family visual identification.
7
table II. thin-section and torque-tube typical applications
Typical Applications
Family
7
Family
8
Family
9
Note
Air mix valve
X
APU
X
APU alternator drive pads
X
APU fan shaft
X
APU generator pad
X
APU H.P. shaft compressor
X
APU high-speed pinion
X
APU L.P. compressor
X
APU main shaft roller
X
APU mainshaft
X
APU starter & fuel control idler
X
APU starter pad
X
APU starter shaft
X
APU tower shaft
X
APU tower shaft & idler
X
APU turbine
X
APU turbine, HP & LP
X
Auxiliary hydraulic pump system
X
Carousel
X
Constant speed drive
X
Elevator feel control arm assembly
X
Engine thrust reverser - actuator
Flap actuator
X
X
X
X
X
Fuel control
X
Generator pad
X
Integrated drive generator
X
JT3D engine
JT9D engine fuel control
X
X
X
Leading edge actuator
X
Pneumatic starter JT9D engine
X
Roller transmission assembly
X
Shut-off valve
X
Thrust reverser
X
Thrust reverser actuator
X
Track roller, turbine thrust reverser
X
Note: Components often fall into multiple families, and some may not be listed here. If your component does not appear to match
a typical family or appears visually different, contact your Timken sales engineer for assistance.
8
Miniature Bearing Part Numbering for Families 1 through 6
Material:
S
AISI 44C stainless-steel
C SAE 52100 chrome steel
U AISI 440C SST + ceramic balls
E SAE 52100 + ceramic balls
N Beryillum Copper
Features:
H
single shield
HH double shield
Z single seal
ZZ double seal
E extended inner ring(1)
(1)
This symbol, indicating variations
in dimensions may appear following other feature codes above.
Radial Play:
P P followed by numbers indicates radial play
range in ten-thousandths of an inch.
Examples:
P28 indicates radial play of 0.0002 in. to 0.0008 in.
P58 indicates radial play of 0.0005 in. to 0.0008 in.
P515 indicates radial play of 0.0005 in. to 0.0015 in.
Flange:
F
flanged bearing,
miniature product
S 418
F
S R4A
– MC – 5 P38
Bearing Size:
This number designates the
basic envelope dimensions
of the bearing.
Type:
Torque: (Applicable to miniature sizes)
Q Q followed by a number indicates peak starting torque
limit in hundreds of mg•mm.
For example, Q14 indicates a bearing with less than
1400 mg•mm peak starting torque.
V V followed by a number indicates peak running torque
limit in hundreds of mg•mm.
For example, V13 indicates a bearing with less than
1300 mg•mm peak running torque. Torque is measured
under a 75 gram thrust load for bearings having an
O.D. of 3/8 in. or less. Larger cataloged bearings are
measured under a test load of 400 grams.
C
H 7
–
Preloaded Pairs:
DB back-to-back mounting
DF face-to-face mounting
DT tandem mounting
Numbers following letter code
indicate nominal preload or
preload range in pounds.
LG31 Q13 –
LYC5
– ZDM DB10
Tolerance:
5
ABEC 5P
7
ABEC 7P
No Symbol full ball complement
C crown-type stainless-steel retainer
M non-separable, phenolic retainer
MB separable inner ring, phenolic retainer
MC one-piece snap-type phenolic retainer
MCJ one-piece snap-type self-lubricating retainer
MCK one-piece molded snap-type Minapar II® retainer
MCX one-piece snap-type self-lubricating retainer
MR non-separable, full ball complement
R ribbon-type stainless-steel retainer
Lubrication:
–
LD no lubrication or dry bearings
L0 followed by a number indicates
specified oil lubrication
LG followed by a number indicates
other specified grease lubrication
LY followed by a number indicates
other Timken-approved lubricants
L0V or LYV followed by a number
indicates specified oil to be vacuum
impregnated into the retainer
L0C or LYC followed by a number
indicates specified oil to be used
and the bearing centrifuged
LGF or LYF followed by a number
indicates film of a specific grease
Dimensional Coding:
Z O graded O.D.’s only
Z B graded bores only
Z D graded O.D.’s and bores
Z DM graded for preloaded pairs
having matched O.D.’s
and bores
Standard dimensional grading is in
increments of 0.0001 in. “X” prefix
for 0.000050 in. increments
9
Thin-Section Bearing Part Numbering for Families 7 through 9
Features 2:
H
single shield
HH double shield
Z single seal
ZZ double seal
E extended inner ring(1)
(1)
This symbol, indicating variations
in dimensions may appear following other feature codes above.
Material:
S
AISI 44C stainless-steel
C SAE 52100 chrome steel
U AISI 440C SST + ceramic balls
E SAE 52100 + ceramic balls
Features 1:
B
fractured outer ring
I
integral shield
A
alternate undersize ball
S 88-100 BI
S
Torque: (Applicable to miniature sizes)
Q Q followed by a number indicates peak starting torque
limit in hundreds of mg•mm.
For example, Q14 indicates a bearing with less than
1400 mg•mm peak starting torque.
V V followed by a number indicates peak running torque
limit in hundreds of mg•mm.
For example, V13 indicates a bearing with less than
1300 mg•mm peak running torque. Torque is measured
under a 75 gram thrust load for bearings having an
O.D. of 3/8 in. or less. Larger cataloged bearings are
measured under a test load of 400 grams.
Radial Play:
P P followed by numbers indicates radial play
range in ten-thousandths of an inch.
P000 P000 indicates standard contact angle
P000 P000 followed by numbers in parenthesis
indicates contact angle range
Examples:
P28 indicates radial play of 0.0002 in. to 0.0008 in.
P000(515) indicates contact angle of 5˚ to 15˚
H 7 P000 LG31 Q13 –
S 1014 – MC – 5 P38
Bearing Size:
This number designates the
basic envelope dimensions
of the bearing.
Type:
Preloaded Pairs:
DB back-to-back mounting
DF face-to-face mounting
DT tandem mounting
Numbers following letter code
indicate nominal preload or
preload range in pounds.
LYC5
– ZDM DB10
Tolerance:
5
ABEC 5P(1), 5T, or 5F
7
ABEC 7P(1), 7T, or 7F
depending on ring size
(1)
applicable to sizes
No Symbol full ball complement
M non-separable, phenolic retainer
MC one-piece snap-type phenolic retainer
MCK one-piece molded snap-type Minapar II® retainer
MR non-separable, full ball complement
MSO angular contact, non-separable, PTFE toroids
MT angular contact, non-separable aluminum
bronze retainer
ST PTFE slug separators
MCT one-piece snap-type aluminum bronze retainer
MS angular contact, non-separable stainless-steel
retainer
S angular contact, non-separable stainless-steel
retainer
Lubrication:
–
LD no lubrication or dry bearings
L0 followed by a number indicates
specified oil lubrication
LG followed by a number indicates
other specified grease lubrication
LY followed by a number indicates
other Timken-approved lubricants
L0V or LYV followed by a number
indicates specified oil to be vacuum
impregnated into the retainer
L0C or LYC followed by a number
indicates specified oil to be used
and the bearing centrifuged
LGF or LYF followed by a number
indicates film of a specific grease
Dimensional Coding:
Z O graded O.D.’s only
Z B graded bores only
Z D graded O.D.’s and bores
Z DM graded for preloaded pairs
having matched O.D.’s
and bores
Standard dimensional grading is in
increments of 0.0001 in. “X” prefix
for 0.000050 in. increments
10
S
R3
F
MC
E
7
P28
L01
1 2 3 4 5 6 7 8
Fig. 1a. Family 1 part number example.
Family 1
Deep-groove,
radial-retainer,
inch and metric
design
To build your TSO part number in
this family of bearings, follow the
Step 1
Specify Material Code
Step 4
Specify Retainer Type
Go to table 1a. The majority of bearings
listed under this family are manufactured
from either 440C stainless steel or 52100
steel.
The standard retainer type for each
basic bearing is shown in table 1a. Other
retainer types listed in the table may be
applied.
•• For the example, we will choose “U,” •• We will choose a one-piece,
which is 440C rings and siliconnitride balls.
steps shown here. Detailed steps are
provided for this family to aid you in
the specification process.
Step 2
Specify Size
Boundary dimensions for all bearings
included in this family are shown in tables
1b and 1c.
machined, snap-type crown,
phenolic, so we add “MC” to our
part number.
Step 5
Specify Features
Table 1a shows designations for seals,
shields and other features.
•• For this example, we will determine
•• For our example, we will choose a
Step 3
Specify Flange
Step 6
Specify Tolerance
Bearings that are flanged have the flange
diameter and width noted in tables 1b and
1c; all others are not flanged.
The available ABEC classes are noted for
each basic bearing in table 1a.
that basic size “R3” meets our
required boundary dimensions.
••
Our “R3” bearing does have a flange,
so an “F” is noted.
wide inner ring and add designation
“E” to the part number.
•• Our example bearing will be
“ABEC 7,” so we will add a “7” to
the part number.
11
Step 7
Specify Radial Internal
Clearance
Step 8
Specify Any Supplementary
Requirements
Standard radial clearance of 0.0051 mm to
0.0203 mm (0.0002 in. to 0.0008 in.) applies
to this family. Alternate radial clearance
ranges are available.
Possible supplemental options are shown
in table 1a. Coding for the possible options
may be found in the Appendix (page 31).
•• Our bearing will have standard
clearance, with part number
code “P28.”
•• We will specify a duplex pair with
back-to-back mounting. This is
added to the part number as “DB.”
Table 1a.
Material
Size
C = 52100 chromiumalloy steel rings
and balls
See
tables
1b &
1c
D = 52100 chromiumalloy steel rings
and titaniumcarbide coated
balls
E = 52100 chromiumalloy steel rings
and siliconnitride balls
S = 440C stainlesssteel rings and
balls
T = 440C stainlesssteel rings and
titanium-carbide
coated balls
U = 440C stainlesssteel rings and
silicon-nitride
balls
Flange
F = flanged
bearing
No = noncode flanged
bearing
Retainer Type
C = one-piece, pressed,
snap-type crown,
stainless-steel
MC = one-piece,
machined, snap-type
crown, phenolic
MCD = one-piece,
machined, snap-type
crown, acetal resin
MCJ = one-piece,
machined,
snap-type crown,
PGM-HT
MCK = one-piece, molded,
snap-type crown,
glass reinforced
nylon
Feature
H = single shield
5 = ABEC 5P
HH = double shield
7 = ABEC 7P
Z = single seal
ZZ = double seal
E = wide inner
ring
OH = single shield
on side
opposite
flange
OZ = single seal on
side opposite
flange
No = open bearing
Code (no shields or
seals)
MCP = one-piece, machined,
snap-type crown,
Salox M
R = two-piece, pressed,
ribbon-type,
stainless-steel
ST = tube type, Teflon
(1)
Tolerance
P followed by 2 to 4 digits indicates radial internal clearance range. For example our standard radial
internal clearance of P28 indicates a radial internal clearance of 0.0002 to 0.0008 in. Alternate radial
internal clearance ranges are available. For radial internal clearance ranges outside the standard range
or less than half this range, consult your Timken sales engineer.
Radial Internal
Supplementary
Clearance
if Required
Lubricant
P28 = standard
other than
radial internal
standard
clearance of
0.0002 to 0.0008
Specific
in. (0.00508 to
torque
0.02032 mm)
requirement
P___ = indicates
Bore & O.D.
alternate radial
size coding
clearance(1)
Duplex pair
designation
12
WI
WO WO
FW FW
W W
r
r
B
r
r
D
D
B
FD FD
r
D
B
D
B
B
FD FD
Broken
Corners
Broken
Corners
Non-Flanged
Equal
Width
Non-Flanged
Width
Fig. 1b. Equal
Non-flanged
equal width.
r
r
D
D
B
WI
WO
FW
r
D
B
WO
WI WI
W W
D
B
Broken
Corners
Broken
Corners
Flanged
Equal
Width
Flanged
Equal
Width
Fig. 1c.
Flanged
equal width.
Non-Flanged
Non-Flanged
Inner
Fig. 1d.Wide
Non-flanged
Extended
extendedInner
inner.
Flanged
Wide
Inner
Fig.Flanged
1e. Flanged
Extended
extendedInner
inner.
Table 1b. Boundary dimensions, miniature and instrument ball bearings,
deep-groove, radial-retainer (inch)
Diameters
Basic
Size
2
25
3c
3r
4C
4R
3332c
3332chh
3332r
5
418c
418r
518
618
R2
R2A
5532
5632
6316
R3
614
814c
814r
R4
R4A
(1)
Open Bearings
Flange
O.D.
Bore
O.D.
B
D
mm
in.
1.016
0.0400
1.191
0.0469
1.397
0.0550
1.397
0.0550
1.984
0.0781
1.984
0.0781
2.380
0.0937
2.380
0.0937
2.380
0.0937
mm
in.
3.175
0.1250
3.967
0.1562
4.763
0.1875
4.763
0.1875
6.350
0.2500
6.350
0.2500
4.763
0.1875
4.763
0.1875
4.763
0.1875
mm
in.
4.343
0.1710
5.156
0.2030
5.944
0.2340
5.944
0.2340
7.518
0.2960
7.518
0.2960
5.944
0.2340
5.944
0.2340
5.944
0.2340
2.380
0.0937
3.175
0.1250
3.175
0.1250
3.175
0.1250
3.175
0.1250
3.175
0.1250
3.175
0.1250
3.967
0.1562
4.763
0.1875
4.763
0.1875
4.763
0.1875
6.350
0.2500
6.350
0.2500
6.350
0.2500
6.350
0.2500
6.350
0.2500
7.938
0.3125
6.350
0.2500
6.350
0.2500
7.938
0.3125
9.525
0.3750
9.525
0.3750
12.700
0.5000
7.938
0.3125
7.938
0.3125
9.525
0.3750
12.700
0.5000
9.525
0.3750
12.700
0.5000
12.700
0.5000
15.875
0.6250
19.050
0.7500
9.119
0.3590
7.518
0.2960
7.518
0.2960
9.119
0.3590
10.719
0.4220
11.176
0.4400
FD
N/A
9.119
0.3590
9.119
0.3590
10.719
0.4220
14.351
0.5650
10.719
0.4220
13.894
0.5470
13.894
0.5470
17.526
0.6900
N/A
Shielded Bearings
Equal Extended Flange
Equal Extended Flange
Width
Width
Inner
Inner
Width
Width
Rings
Rings
Ring
Ring
FW
FD
Wi and Wo
Wi and Wo
Wi
Wi
mm
in.
1.191
0.0469
1.588
0.0625
1.984
0.0781
1.984
0.0781
2.380
0.0937
2.380
0.0937
1.588
0.0625
mm
in.
1.984
0.0781
2.380
0.0937
2.779
0.1094
2.779
0.1094
3.175
0.1250
3.175
0.1250
2.380
0.0937
mm
in.
0.330
0.0130
0.330
0.0130
0.584
0.0230
0.584
0.0230
0.584
0.0230
0.584
0.0230
0.457
0.0180
N/A
N/A
N/A
1.588
0.0625
2.380
0.0937
0.457
0.0180
2.779
0.1094
2.380
0.0937
2.380
0.0937
2.771
0.1091
2.779
0.1094
3.967
0.1562
4.366
0.1719
2.779
0.1094
2.779
0.1094
3.175
0.1250
3.967
0.1562
3.178
0.1251
3.175
0.1250
3.175
0.1250
4.978
0.1960
5.558
0.2188
3.571
0.1406
3.175
0.1250
3.175
0.1250
3.571
0.1406
3.571
0.1406
4.763
0.1875
0.584
0.0230
0.584
0.0230
0.584
0.0230
0.584
0.0230
0.584
0.0230
0.762
0.0300
N/A
N/A
3.571
0.1406
3.571
0.1406
3.967
0.1562
4.610
0.1815
3.967
0.1562
3.967
0.1562
3.967
0.1562
5.771
0.2272
0.584
0.0230
0.584
0.0230
0.584
0.0230
1.067
0.0420
0.584
0.0230
0.584
0.0230
0.584
0.0230
1.067
0.0420
N/A
N/A
mm
in.
mm
in.
mm
in.
N/A
N/A
N/A
2.380
0.0937
2.779
0.1094
2.779
0.1094
3.571
0.1406
3.571
0.1406
3.175
0.1250
3.571
0.1406
3.571
0.1406
4.364
0.1718
4.364
0.1718
0.787
0.0310
0.787
0.0310
0.787
0.0310
0.787
0.0310
0.787
0.0310
N/A
N/A
N/A
2.380
0.0937
2.380
0.0937
3.175
0.1250
3.175
0.1250
0.787
0.0310
0.787
0.0310
3.571
0.1406
2.771
0.1091
2.779
0.1094
3.571
0.1406
3.571
0.1406
3.967
0.1562
4.366
0.1719
3.175
0.1250
3.175
0.1250
3.175
0.1250
4.978
0.1960
3.175
0.1250
4.763
0.1875
4.763
0.1875
4.978
0.1960
7.142
0.2812
4.364
0.1718
3.571
0.1406
3.571
0.1406
4.364
0.1718
4.364
0.1718
4.763
0.1875
0.787
0.0310
0.787
0.0310
0.787
0.0310
0.787
0.0310
0.787
0.0310
0.762
0.0300
N/A
N/A
3.967
0.1562
3.967
0.1562
3.967
0.1562
5.771
0.2272
3.967
0.1562
5.555
0.2187
5.555
0.2187
5.771
0.2272
0.914
0.0360
0.914
0.0360
0.787
0.0310
1.067
0.0420
0.914
0.0360
1.143
0.0450
1.143
0.0450
1.067
0.0420
N/A
N/A
r is the maximum radius of shaft or housing fillet that bearing corner will clear.
Radius(1)
r
mm
in.
0.08
0.0030
0.076
0.0030
0.076
0.0030
0.076
0.0030
0.076
0.0030
0.076
0.0030
0.076
0.0030
0.076
0.0030
0.076
0.0030
0.127
0.0050
0.076
0.0030
0.076
0.0030
0.076
0.0030
0.127
0.0050
0.305
0.0120
0.305
0.0120
0.076
0.0030
0.076
0.0030
0.076
0.0030
0.305
0.0120
0.076
0.0030
0.254
0.0100
0.254
0.0100
0.305
0.0120
0.406
0.0160
Ball
Complement
5
6
5
6
5
8
7
8
8
6
7
8
6
7
7
7
7
7
8
7
11
10
11
8
6
Ball
Size
Load Ratings
Static
Radial
Silicone Dynamic
Nitride
Balls
mm
in.
0.64
0.025
0.79
1/32
1.19
3/64
1.00
0.039
1.59
1/16
1.00
0.039
0.79
1/32
0.64
0.025
0.79
1/32
N
lbf
11
2
16
4
34
8
26
6
57
13
45
10
22
5
17
4
25
6
N
lbf
7
2
11
2
23
5
17
4
39
9
27
6
14
3
10
2
15
3
N
lbf
59
13
100
22
177
40
151
34
287
65
199
45
118
26
85
19
128
29
1.59
1/16
1.00
0.039
1.00
0.039
1.59
1/16
1.59
1/16
1.59
1/16
1.59
1/16
1.19
3/64
1.19
3/64
1.59
1/16
2.38
3/32
1.00
0.039
1.59
1/16
1.59
1/16
2.38
3/32
3.57
9/64
79
18
39
9
45
10
79
18
98
22
98
22
98
22
62
14
62
14
118
26
211
47
71
16
163
37
180
40
269
60
396
89
49
11
24
5
27
6
49
11
61
14
61
14
61
14
39
9
39
9
74
17
135
30
44
10
103
23
113
26
173
39
257
58
365
82
182
41
199
45
365
82
413
93
413
93
413
93
256
58
256
58
458
103
823
185
235
53
530
119
564
127
931
209
1488
334
Continued on next page.
13
Table 1b. Boundary dimensions, miniature and instrument ball bearings,
deep-groove, radial-retainer (inch)
Table 1b continued.
Diameters
Basic
Size
8516
R6
R8
R10
Bore
O.D.
B
D
mm
in.
7.938
0.3125
9.525
0.3750
12.700
0.5000
15.875
0.625
mm
in.
12.700
0.5000
22.225
0.8750
28.575
1.1250
34.925
1.375
Open Bearings
Flange
O.D.
FD
mm
in.
13.894
0.5470
24.613
0.9690
N/A
N/A
Equal Extended Flange
Equal Extended Flange
Width
Inner
Width
Inner
Width
Width
Rings
Ring
Rings
Ring
FW
FD
Wi and Wo
Wi
Wi and Wo
Wi
mm
in.
3.967
0.1562
7.142
0.2812
6.350
0.2500
7.142
0.2812
mm
in.
4.763
0.1875
Load Ratings
Static
Shielded Bearings
N/A
mm
in.
0.787
0.0310
1.575
0.0620
N/A
N/A
N/A
N/A
mm
in.
3.967
0.1562
7.142
0.2812
7.938
0.3125
8.733
0.3438
mm
in.
4.763
0.1875
N/A
mm
in.
0.787
0.0310
1.575
0.0620
N/A
N/A
N/A
N/A
Radius
(1)
r
Ball
Complement
mm
in.
0.127
0.0050
0.406
0.0160
0.406
0.0160
2.489
0.098
11
7
10
10
Ball
Size
Radial
mm
in.
1.59
1/16
3.97
5/32
3.97
5/32
4.76
3/16
N
lbf
183
41
918
206
2111
475
2978
670
Silicone Dynamic
Nitride
Balls
N
lbf
115
26
602
135
1390
313
1970
443
N
lbf
561
126
2578
580
4038
908
5543
1246
Table 1c. Boundary dimensions, miniature and instrument ball bearings,
deep-groove, radial-retainer (metric)
Diameters
Basic
Size
EL1
EL15
EL15R
UL20
EL2
EL2CHH
UL30
EL3
UL40
EL4
34
UL50
EL5
345
35
UL60
EL6
36
UL70
EL7
37
EL8
38
EL9
(1)
Bore
O.D.
B
D
mm
in.
1.000
0.0394
1.500
0.0591
1.500
0.0591
2.000
0.0787
2.000
0.0787
2.000
0.0787
3.000
0.1181
3.000
0.1181
4.000
0.1575
4.000
0.1575
4.000
0.1575
5.000
0.1969
5.000
0.1969
5.000
0.1969
5.000
0.1969
6.000
0.2362
6.000
0.2362
6.000
0.2362
7.000
0.2756
7.000
0.2756
7.000
0.2756
8.000
0.3150
8.000
0.3150
9.000
0.3543
mm
in.
4.000
0.1575
5.000
0.1969
5.000
0.1969
5.000
0.1969
6.000
0.2362
6.000
0.2362
7.000
0.2756
10.000
0.3937
9.000
0.3543
13.000
0.5118
16.000
0.6299
11.000
0.4331
16.000
0.6299
16.000
0.6299
19.000
0.7480
13.000
0.5118
19.000
0.7480
19.000
0.7480
14.000
0.5512
19.000
0.7480
22.000
0.8661
22.000
0.8661
22.000
0.8661
26.000
1.0236
Open Bearings
Shielded Bearings
Flange
O.D.
Equal Width
Rings
Flange
Width
Equal Width
Rings
Flange
Width
FD
Wi and Wo
FW
Wi and Wo
FW
mm
in.
5.00
0.197
6.50
0.256
6.50
0.256
6.10
0.240
7.50
0.295
7.50
0.295
8.10
0.319
11.50
0.453
10.30
0.406
mm
in.
1.600
0.0630
2.000
0.0787
2.000
0.0787
1.500
0.0591
2.300
0.0906
mm
in.
0.50
0.020
0.60
0.024
0.60
0.024
0.50
0.020
0.06
0.002
mm
in.
mm
in.
N/A
N/A
2.600
0.1024
2.000
0.0787
2.300
0.0906
0.80
0.031
0.80
0.031
0.60
0.024
N/A
N/A
N/A
N/A
2.000
0.0787
4.000
0.1575
2.500
0.0984
5.000
0.1969
5.000
0.1969
3.000
0.1181
5.000
0.1969
5.000
0.1969
6.000
0.2362
3.500
0.1378
6.000
0.2362
6.000
0.2362
3.500
0.1378
6.000
0.2362
7.000
0.2756
7.000
0.2756
7.000
0.2756
8.000
0.3150
0.05
0.002
1.00
0.039
0.06
0.002
3.000
0.1181
3.000
0.1181
4.000
0.1575
4.000
0.1575
5.000
0.1969
5.000
0.1969
5.000
0.1969
5.000
0.1969
5.000
0.1969
6.000
0.2362
5.000
0.1969
6.000
0.2362
6.000
0.2362
5.000
0.1969
6.000
0.2362
7.000
0.2756
7.000
0.2756
7.000
0.2756
8.000
0.3150
0.80
0.031
0.80
0.031
1.00
0.039
1.00
0.039
N/A
N/A
12.50
0.492
N/A
N/A
N/A
15.00
0.591
N/A
N/A
16.00
0.630
N/A
N/A
N/A
N/A
N/A
N/A
N/A
0.80
0.031
N/A
N/A
N/A
1.00
0.039
N/A
N/A
1.00
0.039
N/A
N/A
N/A
N/A
N/A
r is the maximum radius of shaft or housing fillet that bearing corner will clear.
N/A
N/A
1.00
0.039
N/A
N/A
N/A
1.10
0.043
N/A
N/A
1.10
0.043
N/A
N/A
N/A
N/A
N/A
Radius(1)
r
mm
in.
0.05
0.002
0.08
0.003
0.08
0.003
0.08
0.003
0.10
0.004
0.10
0.004
0.10
0.004
0.15
0.006
0.10
0.004
0.20
0.008
0.30
0.012
0.15
0.006
0.30
0.012
0.30
0.012
0.30
0.012
0.15
0.006
0.30
0.012
0.30
0.012
0.15
0.006
0.30
0.012
0.30
0.012
0.30
0.012
0.30
0.012
0.30
0.012
Ball
Complement
6
7
8
7
7
8
9
7
7
6
6
8
6
6
6
8
6
6
10
6
7
7
7
7
Ball
Size
mm
in.
0.79
1/32
0.79
1/32
0.79
1/32
0.79
1/32
0.79
1/32
0.64
0.025
1.000
0.039
1.59
1/16
1.59
1/16
2.38
3/32
3.18
1/8
1.59
1/16
3.18
1/8
3.18
1/8
3.57
9/64
1.98
5/64
3.57
9/64
3.57
9/64
1.59
1/16
3.57
9/64
3.97
5/32
3.97
5/32
3.97
5/32
4.76
3/16
Load Ratings
Static
Radial
N
lbf
16
4
22
5
25
6
22
5
22
5
17
4
50
11
98
22
98
22
181
41
297
67
123
28
297
67
297
67
396
89
176
40
396
89
396
89
163
37
396
89
596
134
596
134
596
134
1805
406
Silicone Dynamic
Nitride
Balls
N
lbf
11
2
14
3
15
3
14
3
14
3
10
2
31
7
61
14
61
14
116
26
192
43
77
17
192
43
192
43
257
58
112
25
257
58
257
58
103
23
257
58
389
87
389
87
389
87
1191
268
N
lbf
100
22
118
26
128
29
118
26
118
26
85
19
215
48
413
93
413
93
743
167
1176
264
460
103
1176
264
1176
264
1488
334
654
147
1488
334
1488
334
530
119
1488
334
2031
457
2031
457
2031
457
4273
961
14
C
R3
F
M
7
P28
DB13
1 2 3 4 5 6 7
Fig. 2a. Family 2 part number example.
Family 2
Angular-contact,
non-separable
To build your TSO part number
in this family of bearings, follow
the steps shown here.
Step 1
Specify Material Code
Step 5
Specify Tolerance
The majority of bearings listed under
this family are manufactured from either
440C stainless-steel or 52100 steel.
The applicable ABEC class is noted for
each basic bearing listed in table 2a.
Step 2
Specify Size
Step 6
Specify Radial Internal
Clearance
Boundary dimensions for all bearings
included in this family are shown in
tables 2b.
See table 2b for standard radial plays.
Alternate radial clearance ranges are
available.
Step 3
Specify Flange
Step 7
Specify Any Supplementary
Requirements
Bearings that are flanged have the
flange diameter and width noted in
tables 2b; all others are not flanged.
Common supplemental requirements
are shown in table 2a.
Step 4
Specify Retainer Type
The standard retainer type for each
basic bearing is shown in table 2a.
Other retainer types may be applied.
Table 2a.
Material
C = 52100 chromium-alloy
steel rings and balls
D = 52100 chromium-alloy steel rings
and titanium-carbide coated balls
E = 52100 chromium-alloy steel rings
and silicon-nitride balls
Size
Flange
Retainer Type
Tolerance
See tables
2b & 2c
F = flanged
bearing
M = one-piece, machined,
through hole, phenolic
5 = ABEC 5P
No = noncode flanged
bearing
MP = one-piece, machined,
through hole, porous
polyimide
MR = full ball complement,
no retainer used
S = 440C stainless-steel rings and balls
MX = one-piece, machined,
through hole, Salox M
T = 440C stainless-steel rings and
titanium-carbide coated balls
7 = ABEC 7P
Radial Internal
Clearance
P_ _ = indicates
alternate
radial
clearance(1)
See table 2b for
standard radial
play ranges.
Supplementary
if Required
Lubricant other
than standard
Specific torque
requirement
Bore & O.D. size
Coding
Duplex pair
designation
U = 440C stainless-steel rings
and silicon-nitride balls
(1)
P followed by 2 to 4 digits indicates radial internal clearance range. For example, a radial internal
clearance of P28 indicates a radial internal clearance of 0.0002 to 0.0008 in. Alternate radial internal
clearance ranges are available. For radial internal clearance ranges outside the standard range or
less than half this range, consult your Timken sales engineer.
W
W
FW
W
r
Wi
FW
r
D
B
WO
r
15FW
r
B
Broken CornersBroken Corners
WI
WI
WO
WO
FW
r
D
B
B
FD
FD
WO
D
D
B
WI
r
r
D
WI
D
B
D
FD
B
FD
Broken CornersBroken Corn
Non-Flanged
Equal
Width
Equal Width
FlangedFig.
Equal
Flanged
Equal
Width
Non-Flanged
Wide Inner Wide Inner
Flanged Wide
Flanged
Inner W
Fig.Non-Flanged
2b. Non-flanged
equal
width.
2c.Width
Flanged
equal
width. Non-Flanged
Table 2b. Boundary dimensions, miniature and instrument ball bearings, angular-contact, non-separable
Diameters
Basic
Size
Bore
O.D.
B
D
mm
in.
2.380
Open Bearings
Flange
O.D.
Equal Width Flange
Rings
Width
r
Ball
Radius(1) Complement
Ball
Size
FD
W
FW
mm
in.
mm
in.
mm
in.
mm
in.
mm
in.
mm
in.
7.938
9.12
2.779
0.58
0.13
1.59
5
7
0.0937
0.3125
3.175
6.350
418
0.359
0.1094
0.023
2.776
N/A
0.005
0.1250
0.2500
3.175
7.938
9.12
2.771
0.1250
0.3125
0.359
3.175
9.525
10.72
1/16
0.08
N/A
0.1093
1.00
8
0.003
0.039
0.58
0.08
1.59
0.1091
0.023
0.003
1/16
2.779
0.58
0.13
1.59
518
7
618
7
0.1250
3.175
0.3750
9.525
0.422
11.18
0.1094
3.967
0.023
0.76
0.005
1/16
0.31
R2
1.59
8
0.1250
4.000
0.3750
0.440
16.000
34
0.1562
4.763
0.6299
12.700
0.030
5.000
N/A
0.1575
N/A
3.967
1/16
0.31
0.1969
14.35
0.012
3.18
8
0.012
1.07
1/8
0.31
R3
1.59
8
0.1875
(1)
Radial Play
0.5000
0.565
0.1562
0.042
0.012
r is the maximum radius of shaft or housing fillet that bearing corner will clear.
3/32
From
To
mm
in.
0.005
0.0002
0.013
0.0005
0.023
0.0009
0.005
0.0002
0.013
0.0005
0.005
0.0002
0.013
0.0005
0.023
0.0009
0.005
0.0002
0.013
0.0005
0.023
0.0009
0.005
0.0002
0.013
0.0005
0.023
0.0009
0.033
0.0013
0.043
0.0017
0.011
0.00045
0.022
0.00085
0.032
0.00125
0.005
0.0002
0.013
0.0005
0.023
0.0009
0.033
0.0013
0.043
0.0017
0.053
0.0021
mm
in.
0.013
0.0005
0.023
0.0009
0.033
0.0013
0.013
0.0005
0.020
0.0008
0.013
0.0005
0.023
0.0009
0.033
0.0013
0.013
0.0005
0.023
0.0009
0.033
0.0013
0.013
0.0005
0.023
0.0009
0.033
0.0013
0.043
0.0017
0.053
0.0021
0.022
0.00085
0.032
0.00125
0.042
0.00165
0.013
0.0005
0.023
0.0009
0.033
0.0013
0.043
0.0017
0.053
0.0021
0.064
0.0025
Ref.
Contact Angle
From
To
9
14
14
19
19
22.5
12
19
19
24
9
14
14
19
19
22.5
9.5
15
15
20
20
24
11
17
17
23
23
28
28
32
32
36
13
17.5
17.5
21.5
21.5
24.5
7
11.5
11.5
15.5
15.5
18.5
18.5
21.5
21.5
23.5
23.5
26
Load Ratings
Static
Silicone Dynamic
Radial Nitride
Balls
N
N
N
lbf
lbf
lbf
92
59
395
21
13
89
82
50
392
18
11
88
73
45
388
16
10
87
48
30
201
11
7
45
42
25
196
9
6
44
97
62
405
22
14
91
86
53
401
19
12
90
77
47
396
17
11
89
103
66
415
23
15
93
92
57
410
21
13
92
82
50
403
18
11
91
144
92
507
32
21
114
129
80
498
29
18
112
116
70
487
26
16
109
106
63
474
24
14
107
98
60
462
22
14
104
626
402
1872
141
90
421
585
368
1856
132
83
417
551
340
1838
76
413
124
251
163
903
56
37
203
230
145
897
52
33
202
211
130
889
47
29
200
196
118
882
44
27
198
183
109
874
41
25
196
172
102
866
39
23
195
Continued on next page.
16
Table 4c. Boundary dimensions, angular-contact, non-separable
Table 2b continued.
Diameters
Basic
Size
Bore
O.D.
B
D
mm
in.
mm
in.
5.000
16.000
345
Open Bearings
Flange Equal Width Flange
O.D.
Rings
Width
FD
W
FW
mm
in.
mm
in.
mm
in.
5.000
N/A
Radius
(1)
r
Ball
Complement
Ball
Size
mm
in.
mm
in.
0.31
3.18
N/A
8
0.1969
0.6299
0.1969
0.012
1/8
6.000
19.000
6.000
0.31
3.57
36
N/A
0.2362
0.7480
6.350
12.700
N/A
0.2362
13.89
3.185
0.58
8
0.012
9/64
0.25
1.59
814
10
0.2500
6.350
0.5000
15.875
0.547
17.53
0.1254
4.978
0.023
1.07
0.010
1/16
0.31
R4
1.59
9
0.2500
7.938
0.6250
12.700
0.690
13.89
0.1960
3.967
0.042
0.79
0.012
3/32
0.13
8516
1.59
11
0.3125
0.5000
8.000
22.000
38
0.547
0.1562
0.031
7.000
N/A
0.005
1/16
0.31
3.97
N/A
9
0.3150
0.8661
0.2756
0.012
5/32
9.525
22.225
5.558
0.41
3.97
0.3750
0.8750
R6
(1)
Radial Play
N/A
N/A
0.2188
9
0.016
r is the maximum radius of shaft or housing fillet that bearing corner will clear.
5/32
From
To
mm
in.
0.011
0.0005
0.022
0.0009
0.032
0.0013
0.006
0.0003
0.165
0.0065
0.027
0.0011
0.005
0.0002
0.013
0.0005
0.023
0.0009
0.005
0.0002
0.013
0.0005
0.023
0.0009
0.033
0.0013
0.043
0.0017
0.053
0.0021
0.005
0.0002
0.013
0.0005
0.023
0.0009
0.010
0.0004
0.020
0.0008
0.030
0.0012
0.005
0.0002
0.015
0.0006
0.025
0.0010
mm
in.
0.022
0.0009
0.032
0.0013
0.042
0.0017
0.165
0.0065
0.027
0.0011
0.037
0.0015
0.013
0.0005
0.023
0.0009
0.033
0.0013
0.013
0.0005
0.023
0.0009
0.033
0.0013
0.043
0.0017
0.053
0.0021
0.064
0.0025
0.013
0.0005
0.023
0.0009
0.033
0.0013
0.020
0.0008
0.030
0.0012
0.041
0.0016
0.015
0.0006
0.025
0.0010
0.036
0.0014
Ref.
Contact Angle
From
To
13
17.5
17.5
21.5
21.5
24.5
10.5
17
17
21.5
21.5
25.5
9.5
15
15
20
20
24
7
11.5
11.5
15.5
15.5
18.5
18.5
21.5
21.5
23.5
23.5
26
9.5
15
15
20
20
24
11
16
16
19.5
19.5
22.5
7.5
13
13
16.5
16.5
20
Load Ratings
Static
Silicone Dynamic
Radial Nitride
Balls
N
N
N
lbf
lbf
lbf
626
402
1872
141
90
421
585
368
1856
132
83
417
551
340
1838
124
76
413
782
467
2408
176
105
541
756
449
2353
170
101
529
983
619
2656
221
139
597
171
110
534
39
25
120
154
95
524
35
21
118
139
84
512
31
19
115
314
204
1011
71
46
227
289
183
1001
65
41
225
266
164
990
60
37
223
247
150
979
56
34
220
232
139
968
52
31
218
219
130
956
49
29
215
192
123
566
43
28
127
172
107
555
39
24
125
155
94
542
35
21
122
1357
885
3330
305
199
749
823
3295
1288
290
185
741
1226
771
3259
276
173
733
1197
789
3056
269
177
687
1133
730
3027
255
164
680
1075
680
2997
242
153
674
17
S
R3
F
MB
7
P28
L01
1 2 3 4 5 6 7
Fig. 3a. Family 3 part number.
Family 3
Angular-contact,
separable
To build your TSO part number
in this family of bearings, follow
the steps shown here.
Step 1
Specify Material Code
Step 5
Specify Tolerance
The majority of bearings listed under
this family are manufactured from either
440C stainless-steel or 52100 steel.
The applicable ABEC class is noted for
each basic bearing listed in table 3a.
Step 2
Specify Size
Step 6
Specify Radial Internal
Clearance
Boundary dimensions for all bearings
included in this family are shown in
table 3b.
See table 3b for standard radial plays.
Alternate radial clearance ranges are
available.
Step 3
Specify Flange
Step 7
Specify Any Supplementary
Requirements
Bearings that are flanged have the
flange diameter and width noted in
table 3b; all others are not flanged.
Common supplemental requirements
are shown in table 3a.
Step 4
Specify Retainer Type
The standard retainer type for each
basic bearing is shown in table 3a.
Other retainer types may be applied.
TABLE 3a.
Material
C = 52100 chromium-alloy steel rings
and balls
D = 52100 chromium-alloy steel rings
and titanium-carbide coated balls
E = 52100 chromium-alloy steel rings
and silicon-nitride balls
Size
See
table
3b
Flange
F = flanged
bearing
No = noncode flanged
bearing
S = 440C stainless-steel rings and balls
Retainer Type
Tolerance
MB = one-piece,
machined,
stepped hole,
phenolic
5 = ABEC 5P
7 = ABEC 7P
Radial Internal
Clearance
P_ _ = indicates
alternate
radial
clearance(1)
Supplementary
if Required
Lubricant other than standard
See table 3b for
standard radial
play ranges.
Duplex pair designation
Specific torque requirement
Bore & O.D. size coding
T = 440C stainless-steel rings and
titanium-carbide coated balls
U = 440C stainless-steel rings and
silicon-nitride balls
(1)
P followed by 2 to 4 digits indicates radial internal clearance range. For example, a radial internal
clearance of P28 indicates a radial internal clearance of 0.0002 to 0.0008 in. Alternate radial internal
clearance ranges are available. For radial internal clearance ranges outside the standard range or
less than half this range, consult your Timken sales engineer.
18
W
W
FW
W
r
W
FW
r
r
D
B
B
Broken Corners
WO
WO
r
D
FD
WI
r
D
B
WI
FD
r
B
Broken Corners
WI
WO
FW
FW
r
D
D
B
WI
WO
D
B
D
FD
Broken Corners
B
FD
Broken Corners
Fig.Non-Flanged
3b. Non-flanged
equal
width.
3c.Flanged
FlangedEqual
equal
width.
Equal
Non-Flanged
Width
EqualFlanged
Width Fig.
Equal
Width
Non-Flanged
Width
Wide
Non-Flanged
Inner WideFlanged
Inner Wide Flanged
Inner Wide
Table 3b. Boundary dimensions, angular-contact, separable
Diameters
Basic
Size
Bore
O.D.
B
D
mm
in.
2.380
Open Bearings
Flange
O.D.
Equal Width Flange
Rings
Width
Radius(1)
r
FD
W
FW
mm
in.
mm
in.
mm
in.
mm
in.
mm
in.
7.938
9.12
2.779
0.58
0.13
5
Ball
Complement
Ball
Size
mm
in.
1.59
6
0.0937
0.3125
0.359
0.1094
0.023
0.005
3.175
7.938
9.12
2.771
0.58
0.08
518
1/16
1.59
7
0.1250
0.3125
0.359
0.1091
0.023
0.003
3.175
9.525
10.72
2.779
0.58
0.13
618
1/16
1.59
7
0.1250
0.3750
0.422
0.1094
0.023
0.005
3.175
9.525
11.18
3.967
0.76
0.31
R2
1/16
1.59
7
0.1250
0.3750
4.000
16.000
34
0.440
0.1562
5.000
N/A
0.1575
0.6299
4.763
12.700
0.030
1/16
0.31
3.18
N/A
0.1969
14.35
0.012
3.967
1.07
6
0.012
1/8
0.31
1.59
R3
7
0.1875
0.5000
5.000
16.000
345
0.565
0.1562
0.1969
0.6299
6.000
19.000
0.7480
6.350
12.700
3.18
6
0.012
6.000
1/8
0.31
N/A
0.2362
3.185
3/32
0.31
0.1969
13.89
0.012
N/A
N/A
0.2362
0.042
5.000
N/A
36
3.57
6
0.012
0.58
9/64
0.25
814
1.59
10
0.2500
0.5000
0.547
0.1254
0.023
0.010
1/16
6.350
15.875
17.53
4.978
1.07
0.31
1.59
R4
8
0.2500
0.6250
8.000
22.000
38
0.690
0.1960
0.8661
0.042
7.000
N/A
0.3150
(1)
Radial Play
0.012
0.31
N/A
0.2756
3/32
3.97
7
0.012
r is the maximum radius of shaft or housing fillet that bearing corner will clear.
5/32
From
To
mm
in.
0.010
0.0004
0.025
0.0010
0.010
0.0004
0.025
0.0010
0.010
0.0004
0.025
0.0010
0.010
0.0004
0.025
0.0010
0.011
0.00045
0.022
0.00085
0.032
0.00125
0.010
0.0004
0.030
0.0012
0.051
0.0020
0.015
0.0006
0.036
0.0014
0.013
0.0005
0.033
0.0013
0.010
0.0004
0.025
0.0010
0.010
0.0004
0.030
0.0012
0.051
0.0020
0.020
0.0008
0.041
0.0016
mm
in.
0.025
0.0010
0.046
0.0018
0.025
0.0010
0.046
0.0018
0.025
0.0010
0.046
0.0018
0.025
0.0010
0.046
0.0018
0.022
0.00085
0.032
0.00125
0.042
0.00165
0.030
0.0012
0.051
0.0020
0.064
0.0025
0.036
0.0014
0.056
0.0022
0.033
0.0013
0.053
0.0021
0.025
0.0010
0.046
0.0018
0.030
0.0012
0.051
0.0020
0.064
0.0025
0.041
0.0016
0.061
0.0024
Ref.
Contact Angle
From
To
12.5
19.5
19.5
26.5
12.5
19.5
19.5
26.5
13
21
21
28
12.5
19.5
19.5
26.5
13
17.5
17.5
21.5
21.5
24.5
10
18
18
23
23
26
11
16.5
16.5
21
8
12.5
12.5
16
13
21
21
28
10
18
18
23
23
26
11
15.5
15.5
19
Load Ratings
Static
Silicone Dynamic
Radial Nitride
Balls
N
N
N
lbf
lbf
lbf
70
45
353
16
10
79
66
45
347
15
10
78
86
53
401
19
12
90
72
47
389
16
11
87
92
57
410
21
13
92
77
50
396
17
11
89
78
48
379
18
11
85
65
43
368
15
10
83
193
123
952
43
28
214
178
111
947
40
25
213
165
111
941
37
25
212
197
123
818
44
28
184
168
102
799
38
23
180
152
102
783
34
23
176
269
168
1169
61
38
263
240
163
1149
54
37
258
264
166
1245
59
37
280
232
156
1232
52
35
277
154
95
524
35
21
118
130
77
506
29
17
114
251
158
923
57
35
207
216
130
901
49
29
203
195
116
883
44
26
199
537
337
2015
121
76
453
484
295
1988
109
66
447
19
S
R4
F
HH
7
P28
L01
1 2 3 4 5 6 7
Fig. 4a. Family 4 part number.
Family 4
Deep-groove,
full-complement
To build your TSO part number
in this family of bearings, follow
the steps shown here.
Step 1
Specify Material Code
Step 5
Specify Tolerance
The majority of bearings listed under
this family are manufactured from either
440C stainless-steel or 52100 steel.
The applicable ABEC class is noted for
each basic bearing listed in table 4a.
Step 2
Specify Size
Boundary dimensions for all bearings
included in this family are shown in
table 4b.
Step 3
Specify Flange
Bearings that are flanged have the
flange diameter and width noted in
table 4b; all others are not flanged.
Step 4
Specify Feature (shields)
Step 6
Specify Radial Internal
Clearance
Standard radial clearance of 0.0051 mm
to 0.0203 mm (0.0002 in. to 0.0008 in.)
applies to this family. Alternate radial
clearance ranges are available.
Step 7
Specify Any Supplementary
Requirements
Common supplemental requirements
are shown in table 4a.
The standard feature codes for each
basic bearing are shown in table 4a.
TABLE 4a.
Material
Size
S
100
S
2
S
3332
S
518
S
5632
S
R2
S
R3
S
R4
Flange
F = flanged
bearing
No code = nonflanged
bearing
Feature
Tolerance
Radial Internal Clearance
HH = double
shield
5 = ABEC 5P
P28 = standard radial internal
clearance of 0.0002 to
0.0008 in. (0.00508 to
0.02032 mm)
No code = open
bearing
(no shields
or seals)
7 = ABEC 7P
P_ _ = indicates alternate
radial clearance(1)
Supplementary
if Required
Lubricant other than
standard
Specific torque
requirement
Bore & O.D. size
coding
Duplex pair
designation
S = 440C stainless-steel rings
and balls
C = 52100 chromium-alloy
steel rings and balls
U = 440C stainless-steel rings
and silicon-nitride balls
(1)
P followed by 2 to 4 digits indicates radial internal clearance range. For example our standard radial
internal clearance of P28 indicates a radial internal clearance of 0.0002 to 0.0008 in. Alternate radial
internal clearance ranges are available. For radial internal clearance ranges outside the standard range
or less than half this range, consult your Timken sales engineer.
20
W
W
W
WI
WI
WO
WO
FW FW
W
r
r
B
r
r
D
D
FD
B
FD
FW
r
r
D
D
B
WI
WI
WO W
O
B
B
FD FD
Broken
Corners
Broken
Corners
Non-Flanged
Equal
Width
Non-Flanged
Equal
Width
Fig. 4b. Non-flanged
equal width.
D
D
B
B
r
r
D
D
B
Broken
Corners
Broken
Corners
Flanged Equal
Width
Flanged
Width
Fig. 4c.Equal
Flanged
equal width.
Non-Flanged
Non-Flanged
Inner
Fig. 4d.Wide
Non-flanged
Extended
extendedInner
inner.
Flanged
Flanged
Inner
Fig.Wide
4e. Flanged
Extended
extendedInner
inner.
Table 4b. Boundary dimensions, deep-groove, full-complement
Diameters
Basic
Size
(1)
Open Bearings
Flange
O.D.
Shielded Bearings
Equal Extended Flange
Equal Extended Flange
Width
Inner
Width
Inner
Width
Width
Rings
Ring
Rings
Ring
FW
FW
Wi and Wo
Wi
Wi and Wo
Wi
Radius(1)
Bore
O.D.
B
D
mm
in.
mm
in.
mm
in.
mm
in.
mm
in.
mm
in.
mm
in.
mm
in.
mm
in.
mm
in.
100
0.635
0.0250
2.560
0.1008
N/A
0.792
0.0312
N/A
N/A
N/A
N/A
N/A
0.08
0.003
2
1.016
0.0400
3.175
0.1250
4.34
0.171
1.191
0.0469
N/A
0.33
0.013
N/A
N/A
N/A
3332
2.380
0.0937
4.763
0.1875
5.94
0.234
1.588
0.0625
2.380
0.0937
0.46
0.018
2.380
0.0937
3.175
0.1250
518
3.175
0.1250
7.938
0.3125
9.12
0.359
2.779
0.1094
3.571
0.1406
0.58
0.023
3.571
0.1406
5632
4.763
0.1875
7.938
0.3125
9.12
0.359
2.779
0.1094
3.571
0.1406
0.58
0.023
R2
3.175
0.1250
9.525
0.3750
11.18
0.440
3.967
0.1562
N/A
R3
4.763
0.1875
12.700
0.5000
14.35
0.565
3.967
0.1562
R4
6.350
0.2500
15.875
0.6250
17.53
0.690
4.978
0.1960
FD
r
Ball
Complement
Ball
Size
Load Ratings
Static
Radial
Silicone Dynamic
Nitride
Balls
mm
in.
N
lbf
N
lbf
N
lbf
7
0.64
0.025
8
2
6
1
65
15
0.08
0.003
10
0.64
0.025
16
4
10
2
94
21
0.79
0.031
0.08
0.003
14
0.79
1/32
45
10
27
6
187
42
4.364
0.1718
0.79
0.031
0.08
0.003
11
1.59
1/16
145
33
91
20
546
123
3.175
0.1250
3.967
0.1562
0.91
0.036
0.08
0.003
16
1.19
3/64
143
32
89
20
445
100
0.76
0.030
3.967
0.1562
N/A
0.76
0.030
0.30
0.012
12
1.59
1/16
168
38
105
24
592
133
4.763
0.1875
1.07
0.042
4.978
0.1960
5.771
0.2272
1.07
0.042
0.30
0.012
11
2.38
3/32
332
75
212
48
1112
250
N/A
1.07
0.042
4.978
0.1960
N/A
1.07
0.042
0.30
0.012
14
2.38
3/32
471
106
302
68
1351
304
r is the maximum radius of shaft or housing fillet that bearing corner will clear.
21
C
R2
F
R
7
P28
L01
1 2 3 4 5 6 7
Fig. 5a. Family 5 part number.
Family 5
Deep-groove,
radial-retainer,
narrow series
To build your TSO part number
in this family of bearings, follow
Step 1
Specify Material Code
Step 5
Specify Tolerance
The majority of bearings listed under
this family are manufactured from either
440C stainless-steel or 52100 steel.
The applicable ABEC class is noted for
each basic bearing listed in table 5a.
Step 2
Specify Size
the steps shown here.
Boundary dimensions for all bearings
included in this family are shown in
table 5b.
Step 3
Specify Flange
Step 6
Specify Radial Internal
Clearance
Standard radial clearance of 0.0051 mm
to 0.0203 mm (0.0002 in. to 0.0008 in.)
applies to this family. Alternate radial
clearance ranges are available.
Step 7
Specify Any Supplementary
Requirements
Bearings that are flanged have the
flange diameter and width noted in
table 5b; all others are not flanged.
Common supplemental requirements
are shown in table 5a.
Step 4
Specify Feature (shields)
The standard feature codes for each
basic bearing are shown in table 5a.
TABLE 5a.
Material
C = 52100 chromium-alloy
steel rings and balls
D = 52100 chromium-alloy
steel rings and titaniumcarbide coated balls
E = 52100 chromium-alloy
steel rings and siliconnitride balls
Size
Flange
Retainer Type
Feature
Tolerance
Radial Internal Clearance
See
table
5b
F= flanged
bearing
C = one-piece, pressed,
snap-type crown,
stainless-steel
HN = single
shield
narrow
5 = ABEC 5P
P28 = standard radial
internal clearance
of 0.0002 to 0.0008
in. (0.00508 to
0.02032 mm)
No code =
nonflanged
bearing
R = two-piece, pressed,
ribbon-type,
stainless-steel
S = 440C stainless-steel
rings and balls
7 = ABEC 7P
P_ _ =indicates alternate
radial clearance(1)
Supplementary
if Required
Lubricant other
than standard
Specific torque
requirement
Bore & O.D. size
coding
Duplex pair
designation
T = 440C stainless-steel
rings and titaniumcarbide coated balls
U = 440C stainless-steel rings
and silicon-nitride balls
(1)
P followed by 2 to 4 digits indicates radial internal clearance range. For example our standard radial
internal clearance of P28 indicates a radial internal clearance of 0.0002 to 0.0008 in. Alternate radial
internal clearance ranges are available. For radial internal clearance ranges outside the standard range
or less than half this range, consult your Timken sales engineer.
22
WI
W
WO
FW
W
r
r
r
D
Broken Corners
Diameters
Bore
O.D.
B
D
mm
in.
mm
in.
mm
in.
mm
in.
3
1.397
0.0550
4.763
0.1875
2.380
0.0937
0.076
0.0030
4
1.984
0.0781
6.350
0.2500
2.779
0.1094
5
2.380
0.0937
7.938
0.3125
418
3.175
0.1250
518
W
Chamfer
Ball
Size
Non-Flanged Wide Inner
Load Ratings
Static
Radial
FD
Broken
Non-Flanged Equal Width
Flanged Equal Width
Table 5b. Boundary dimensions, deep-groove, radial-retainer, narrow series
Ball
Complement
B
B
FD
Fig. 5b. Non-flanged equal width.
Width
D
D
B
Basic
Size
FW
Dynamic
Silicone
Nitride Balls
mm
in.
N
lbf
N
lbf
N
lbf
5
1.19
3/64
34
8
23
5
177
40
0.076
0.0030
5
1.59
1/16
57
13
39
9
287
65
2.779
0.1094
0.127
0.0050
6
1.59
1/16
79
18
49
11
365
82
6.350
0.2500
2.380
0.0937
0.076
0.0030
7
1.00
0.039
39
9
24
5
182
41
3.175
0.1250
7.938
0.3125
2.779
0.1094
0.076
0.0030
6
1.59
1/16
79
18
49
11
365
82
618
3.175
0.1250
9.525
0.3750
2.779
0.1094
0.127
0.0050
7
1.59
1/16
98
22
61
14
413
93
5532
3.967
0.1562
7.938
0.3125
2.779
0.1094
0.076
0.0030
7
1.19
3/64
62
14
39
9
256
58
5632
4.763
0.1875
7.938
0.3125
2.779
0.1094
0.076
0.0030
7
1.19
3/64
62
14
39
9
256
58
814c
6.350
0.2500
12.700
0.5000
3.175
0.1250
0.254
0.0100
10
1.59
1/16
163
37
103
23
530
119
814r
6.350
0.2500
12.700
0.5000
3.175
0.1250
0.254
0.0100
11
1.59
1/16
180
40
113
26
564
127
Flange
23
A
280
1
2
Fig. 6a. Family 6 part number.
Family 6
Deep-groove,
radial-retainer,
modified
dimension
Family 6 bearings are unique because they are modified-dimension product. Those
modified-dimension bearings that cannot be described using the Timken catalog
part numbering system are described using the alpha-numeric special design part
numbering system. This is a combination of the basic bearing number from table 6a and
a sequential dash number assigned for each specific application. Basic bearing chassis
can be determined by using tables 6a, 6b, 6c and 6d. The remaining nomenclature
should be completed with the assistance of a Timken engineer.
To build your TSO part number
in this family of bearings, follow
W
the steps shown here.
FW
W
Step 1
Specify Basic Bearing
r
r
D
Basic Family 6 bearings are
listed in tables 6a, 6b, 6c, 6d.
D
B
B
FD
Step 2
Contact Timken
Broken Corners
Remaining information for
your specific part should be
discussed with your Timken
sales engineer.
Non-Flanged
Width
Fig. 6b. Equal
Non-flanged
equal width.
Flanged
Equal
Width
Fig. 6c.
Flanged
equal width.
Table 6a. Boundary dimensions, modified dimensions
Basic
Size
A834
A281
A521
B70
A430
A431
D983
B698
E685
G229
Diameters
Bore
O.D.
B
mm
in.
D
mm
in.
3.175
0.1250
3.175
0.1250
3.175
0.1250
3.175
0.1250
3.175
0.1250
3.175
0.1250
6.350
0.2500
6.350
0.2500
7.938
0.3125
9.525
0.3750
9.525
0.3750
9.525
0.3750
10.414
0.4100
10.414
0.4100
12.700
0.5000
12.700
0.5000
12.700
0.5000
19.050
0.7500
12.700
0.5000
15.875
0.6250
Flange
Dia.
Flange
Width
FD
FW
mm
in.
mm
in.
mm
in.
mm
in.
2.380
0.0937
2.779
0.1094
2.380
0.0937
2.380
0.0937
2.779
0.1094
2.779
0.1094
3.175
0.1250
4.978
0.1960
2.779
0.1094
4.978
0.1960
N/A
N/A
N/A
N/A
N/A
N/A
N/A
N/A
N/A
N/A
N/A
N/A
13.894
0.5470
0.584
0.0230
N/A
N/A
13.894
0.5470
0.584
0.0230
0.08
0.003
0.08
0.003
0.13
0.005
0.08
0.003
0.13
0.005
0.08
0.003
0.25
0.010
0.30
0.012
0.25
0.010
0.25
0.010
Inner
Width
Outer
Width
mm
in.
2.380
0.0937
2.779
0.1094
2.380
0.0937
2.380
0.0937
2.779
0.1094
2.779
0.1094
6.731
0.2650
4.978
0.1960
2.779
0.1094
4.978
0.1960
N/A
N/A
Chamfer
Standard
Retainer
Type
R
C
C
R
C
C
Load Ratings
Closures
Double
Shield
Double
Shield
Single
Shield
Double
Shield
Single
Shield
Double
Shield
ABEC
7P
7P
7P
5P
5P
5P
C
Open
7P
R
Double
Shield
7P
R
Open
5P
ST
Double
Shield
7P
Static
Dynamic
N
lbf
N
lbf
48
11
42
9
76
17
48
11
36
8
39
9
156
35
282
63
189
42
293
66
201
45
184
41
246
55
201
45
167
38
182
41
525
118
935
210
564
127
686
154
Non-Fl
24
Table 6b. Boundary dimensions, modified dimensions for FAA approved TSO items
based on established approved designs
Basic
Size
A280
B44
F718
L120
Diameters
Bore
O.D.
B
mm
in.
D
mm
in.
2.380
0.0937
4.763
0.1875
4.763
0.1875
9.525
0.3750
6.985
0.2750
12.700
0.5000
12.700
0.5000
22.225
0.8750
Inner
Width
Outer
Width
Chamfer
mm
in.
mm
in.
mm
in.
1.588
0.0625
2.779
0.1094
3.967
0.1562
7.142
0.2812
1.588
0.0625
2.779
0.1094
3.967
0.1562
7.142
0.2812
0.127
0.005
0.08
0.003
0.18
0.007
0.41
0.016
Standard
Retainer
Type
Load Ratings
Closures
ABEC
Single
Shield
Single
Shield
Double
Shield
Double
Shield
C
C
R
ST
5P
7P
7P
7P
Reference
Family
Dynamic
Static
Hybrid
Static
N
lbf
N
lbf
N
lbf
18
4
59
13
126
28
771
173
11
3
36
8
81
18
501
113
87
19
253
57
462
104
2318
521
Reference
Chassis
Size
1
3332
1
5632
1
6316
1
R6
Table 6c. Boundary dimensions, modified dimensions for FAA approved TSO items
based on established approved family (2) designs
Basic
Size
Diameters
Bore
O.D.
B
mm
in.
D
mm
in.
4.763
12.700
Standard
Chamfer Retainer Closures
Type
Inner
Width
Outer
Width
mm
in.
mm
in.
mm
in.
3.976
3.967
0.30
F557
0.1875
0.5
0.1562
0.1562
0.012
4.763
12.700
3.967
3.967
0.30
L469
0.1875
0.5
0.1562
0.1562
Radial Play
ABEC
M
Open
7P
MP
Open
7P
0.012
Load Ratings
From
To
Static
Hybrid
Static
mm
in.
0.005
0.0002
0.013
0.0005
0.023
0.0009
0.033
0.0013
0.043
0.0017
0.053
0.0021
0.005
0.0002
0.013
0.0005
0.023
0.0009
0.033
0.0013
0.043
0.0017
0.053
0.0021
mm
in.
0.013
0.0005
0.023
0.0009
0.033
0.0013
0.043
0.0017
0.063
0.0021
0.064
0.0025
0.013
0.0005
0.023
0.0009
0.033
0.0013
0.043
0.0017
0.053
0.0021
0.064
0.0025
N
lbf
251
56
230
52
211
47
196
44
183
41
172
39
251
56
230
52
211
47
196
44
183
41
172
39
N
lbf
163
37
145
33
130
29
118
27
109
25
102
23
163
37
145
33
130
29
118
27
109
25
102
23
Reference
Refence
Chassis
Family
Dynamic
Size
N
lbf
903
203
897
202
889
200
882
198
874
196
866
195
903
203
897
202
889
200
882
198
874
196
866
195
2
R3
2
R3
Table 6d. Boundary dimensions, modified dimensions for FAA approved TSO items
based on established approved family (3) designs
Basic
Size
Config.
Suffix
Diameters
Bore
O.D.
B
mm
in.
D
mm
in.
2.380
0.0937
7.938
0.3125
Inner
Width
Standard
Outer
Chamfer Retainer Closures ABEC
Width
Type
mm
in.
mm
in.
mm
in.
2.779
0.1094
2.779
0.1094
0.127
0.005
Load Ratings
Radial Play
Static
Hybrid
Dynamic
Static
N
lbf
N
lbf
N
lbf
70
16
45
10
354
80
Reference
Reference
Chassis
Family
Size
000
F816
800
803
811
MB
Open
7P
0.0003
0.0011
3
5
25
C
2128
MC
H
5
P511
L01
1 2 3 4 5 6 7
Fig. 7a. Family 7 part number.
Family 7
Thin-section/
torque-tube,
Conrad series
To build your TSO part number
in this family of bearings, follow
the steps shown here.
Step 1
Specify Material Code
Step 5
Specify Tolerance
The majority of bearings listed under
this family are manufactured from either
440C stainless-steel or 52100 steel.
The applicable ABEC class is noted for
each basic bearing listed in table 7a.
Step 2
Specify Size
Step 6
Specify Radial Internal
Clearance
Boundary dimensions for all bearings
included in this family are shown in
table 7b and table 7c.
See table 7a for standard radial internal
clearances for this family. Alternate
radial clearance ranges are available.
Step 3
Specify Retainer Type
Step 7
Specify Any Supplementary
Requirements
The standard retainer type for each
basic bearing is shown in table 7a.
Other retainer types may be applied.
Common supplemental requirements
are shown in table 7a.
Step 4
Specify Feature (shields)
The standard feature codes for each
basic bearing are shown in table 7a.
Table 7a.
Material
C = 52100 chromium-alloy
steel rings and balls
D = 52100 chromium-alloy
steel rings and titaniumcarbide coated balls
E = 52100 chromium-alloy
steel rings and siliconnitride balls
S = 440C stainless-steel
rings and balls
Size
Retainer Type
See
tables
7b &7c
MC = one-piece,
machined,
snap-type crown,
phenolic
MCK = one-piece, molded,
snap-type crown,
glass reinforced
nylon
ST = tube type, Teflon
T = 440C stainless-steel
rings and titaniumcarbide coated balls
U = 440C stainless-steel
rings and silicon-nitride
balls
(1)
Feature
H = single shield
HH = double shield
Z = single seal
ZZ = double seal
E = wide inner
ring
No = open bearing
code (no shields or
seals)
Radial Internal
Clearance
For Conrad bearings, standard
3 = class 3
radial internal clearances are:
5 = ABEC 5P, Ball Standard
5T or 5F
Size Radial Play (in.)
(ABEC 5P
1/16”, 3/32” 0.0003-0.0008 P38
for 610
1/8”
0.0005-0.0011 P511
and 812
5/32” 0.0006-0.0012 P612
sizes)
3/16” 0.0007-0.0015 P715
7 = ABEC 7P,
1/8” and 0.0005-0.0015 P515
7T or 7F
larger
(ABEC 7P
Contact angle 30˚ Nominal
for 610
and 812
P_ _ = indicates alternate
sizes)
radial clearance(1)
Tolerance
Supplementary
if Required
Lubricant other
than standard
Specific torque
requirement
Bore & O.D. size
coding
Duplex pair
designation
P followed by 2 to 4 digits indicates radial internal clearance range. For example our standard radial
internal clearance of P28 indicates a radial internal clearance of 0.0002 to 0.0008 in. Alternate radial
internal clearance ranges are available. For radial internal clearance ranges outside the standard
range or less than half this range, consult your Timken sales engineer.
26
W
W
W FW
W
r
r
r
WO
WO
B
B
Fig. 7b. Non-flanged
equal width.
Broken Corners
FD
r
r
r
D
D
B
B
WO
FW
D
D
WI
WI
WO
r
r
D
D
FD
WI
FW
D
B
WI
FD
Fig. 7c. Non-flanged extended inner.
Broken Corners
B
B
Broken Corners
D
FD
B
Broken Corners
Non-Flanged Equal Width
Equal WidthFlanged Equal
Non-Flanged
Flanged
Non-FlangedFlanged
Equal Width
Width
Non-Flanged Wide
Inner
Flanged Wide Inner
Extended
Inner instrument Extended
Inner
Table 7b. Boundary dimensions, torque-tube series, Conrad
assembly
ball bearings
Diameters
Basic
Size
610
812
1014
1216
1418
1622
1721
2024
2226
2428
2430
2630
3240
3242
4048
4050
4856
4858
5664
5666
6472
64-74
64-76
64-80
68-76
68-78
Ball Complement
Bore
O.D.
B
D
mm
in.
9.525
0.3750
12.700
0.5000
15.875
0.6250
19.050
0.7500
22.225
0.8750
25.400
1.0000
26.988
1.0625
31.750
1.2500
34.925
1.3750
38.100
1.5000
38.100
1.5000
41.275
1.6250
50.800
2.0000
50.800
2.0000
63.500
2.5000
63.500
2.5000
76.200
3.0000
76.200
3.0000
88.900
3.5000
88.900
3.5000
101.600
4.0000
101.600
4.0000
101.600
4.0000
101.600
4.0000
107.950
4.2500
107.950
4.2500
mm
in.
15.875
0.6250
19.050
0.7500
22.225
0.8750
25.400
1.0000
28.575
1.1250
34.925
1.3750
33.338
1.3125
38.100
1.5000
41.275
1.6250
44.450
1.7500
47.625
1.8750
47.625
1.8750
63.500
2.5000
66.675
2.6250
76.200
3.0000
79.375
3.1250
88.900
3.5000
92.075
3.6250
101.600
4.0000
104.775
4.1250
114.300
4.5000
117.475
4.6250
120.650
4.7500
127.000
5.0000
120.650
4.7500
123.825
4.8750
Width
W
mm
in.
3.962
0.1560
3.962
0.1560
3.962
0.1560
3.962
0.1560
3.962
0.1560
4.763
0.1875
3.962
0.1560
3.962
0.1560
3.962
0.1560
3.962
0.1560
4.763
0.1875
3.962
0.1560
6.350
0.2500
7.938
0.3125
6.350
0.2500
7.938
0.3125
6.350
0.2500
7.938
0.3125
6.350
0.2500
7.938
0.3125
6.350
0.2500
7.938
0.3125
9.525
0.3750
12.700
0.5000
6.350
0.2500
7.938
0.3125
Chamfer
mm
in.
0.25
0.010
0.25
0.010
0.25
0.010
0.25
0.010
0.25
0.010
0.38
0.015
0.25
0.010
0.25
0.010
0.25
0.010
0.25
0.010
0.38
0.015
0.25
0.010
0.64
0.025
1.02
0.040
0.64
0.025
1.02
0.040
0.64
0.025
1.02
0.040
0.64
0.025
1.02
0.040
0.64
0.025
1.02
0.040
1.02
0.040
1.52
0.060
0.64
0.025
1.02
0.040
Ball
Quantity
14
17
20
24
26
21
32
36
40
44
29
48
30
25
36
30
43
35
49
40
55
45
38
30
58
48
Load Ratings
Radial Static
Ball
Diameter
Steel
Ceramic
Hybrid
Dynamic
mm
in.
1.59
1/16
1.59
1/16
1.59
1/16
1.59
1/16
1.59
1/16
2.38
3/32
1.59
1/16
1.59
1/16
1.59
1/16
1.59
1/16
2.38
3/32
1.59
1/16
3.18
1/8
3.97
5/32
3.18
1/8
3.97
5/32
3.18
1/8
3.97
5/32
3.18
1/8
3.97
5/32
3.18
1/8
3.97
5/32
4.76
3/16
6.35
1/4
3.18
1/8
3.97
5/32
N
lbf
338
76
427
96
516
116
605
136
693
156
1648
370
865
195
984
221
1100
247
1215
273
2358
530
1331
299
4393
988
5555
1249
5352
1203
6787
1526
6459
1452
8017
1802
6745
1516
8267
1859
7616
1712
9369
2106
11072
2489
15956
3587
8052
1810
10024
2254
N
lbf
214
48
271
61
327
74
384
86
440
99
1067
240
549
124
625
141
699
157
772
174
1528
344
846
190
2839
638
3601
810
3459
778
4402
990
4176
939
5202
1169
4220
949
5160
1160
4766
1072
5849
1315
6901
1551
9973
2242
5039
1133
6259
1407
N
lbf
757
170
823
185
879
198
928
209
974
219
2154
484
1067
240
1107
249
1158
260
1206
271
2435
547
1251
281
4201
944
5838
1313
4484
1008
6253
1406
4811
1082
6620
1488
4673
1051
6397
1438
4865
1094
6675
1501
8623
1939
13596
3056
4955
1114
6855
1541
Continued on next page.
27
Table 7b continued.
Table 7b. Boundary dimensions, torque-tube series, Conrad assembly instrument ball bearings
Diameters
Basic
Size
68-80
68-84
72-80
72-82
72-84
72-88
76-84
76-86
76-88
76-92
80-88
80-90
80-92
80-96
88-96
Ball Complement
Bore
O.D.
B
D
mm
in.
107.950
4.2500
107.950
4.2500
114.300
4.5000
114.300
4.5000
114.300
4.5000
114.300
4.5000
120.650
4.7500
120.650
4.7500
120.650
4.7500
120.650
4.7500
127.000
5.0000
127.000
5.0000
127.000
5.0000
127.000
5.0000
139.700
5.5000
mm
in.
127.000
5.0000
133.350
5.2500
127.000
5.0000
130.175
5.1250
133.350
5.2500
139.700
5.5000
133.350
5.2500
136.525
5.3750
139.700
5.5000
146.050
5.7500
139.700
5.5000
142.875
5.6250
146.050
5.7500
152.400
6.0000
152.400
6.0000
Width
Chamfer
W
mm
in.
9.525
0.3750
12.700
0.5000
6.350
0.2500
7.938
0.3125
9.525
0.3750
12.700
0.5000
6.350
0.2500
7.938
0.3125
9.525
0.3750
12.700
0.5000
6.350
0.2500
7.938
0.3125
9.525
0.3750
12.700
0.5000
6.350
0.2500
Ball
Quantity
mm
in.
1.02
0.040
1.52
0.060
0.64
0.025
1.02
0.040
1.02
0.040
1.52
0.060
0.64
0.025
1.02
0.040
1.02
0.040
1.52
0.060
0.64
0.025
1.02
0.040
1.02
0.040
1.52
0.060
0.64
0.025
40
31
62
50
43
33
65
53
45
35
68
55
47
36
74
Load Ratings
Radial Static
Ball
Diameter
Steel
Ceramic
Hybrid
Dynamic
mm
in.
4.76
3/16
6.35
1/4
3.18
1/8
3.97
5/32
4.76
3/16
6.35
1/4
3.18
1/8
3.97
5/32
4.76
3/16
6.35
1/4
3.18
1/8
3.97
5/32
4.76
3/16
6.35
1/4
3.18
1/8
N
lbf
11697
2630
16564
3724
8626
1939
10471
2354
12615
2836
17706
3980
9062
2037
11126
2501
13240
2976
18849
4237
9497
2135
11572
2601
13865
3117
19453
4373
10367
2331
N
lbf
7291
1639
10354
2328
5399
1214
6538
1470
7864
1768
11070
2489
5672
1275
6948
1562
8255
1856
11786
2650
5945
1337
7227
1625
8645
1943
12165
2735
6491
1459
N
lbf
8780
1974
13686
3077
5098
1146
6934
1559
9074
2040
14063
3161
5182
1165
7102
1597
9218
2072
14423
3243
5263
1183
7176
1613
9357
2104
14502
3260
5419
1218
Table 7c. Boundary dimensions, torque-tube series, Conrad assembly instrument ball bearings
Diameters
Basic
Size
Extended
Inner Ring
Wi
Radius(1)
Bore
O.D.
B
D
mm
in.
15.875
0.6250
19.050
0.7500
22.225
0.8750
26.988
1.0625
33.338
1.3125
39.688
1.5625
46.038
1.8125
52.388
2.0625
58.738
2.3125
65.088
2.5625
mm
in.
26.988
1.0625
30.163
1.1875
33.338
1.3125
38.100
1.5000
44.450
1.7500
50.800
2.0000
57.150
2.2500
66.675
2.6250
73.025
2.8750
82.550
3.2500
mm
in.
6.350
0.2500
6.350
0.2500
6.350
0.2500
6.350
0.2500
6.350
0.2500
6.350
0.2500
6.350
0.2500
6.350
0.2500
6.350
0.2500
7.938
0.3125
mm
in.
7.137
0.2810
7.137
0.2810
7.137
0.2810
7.137
0.2810
7.137
0.2810
7.137
0.2810
7.137
0.2810
7.137
0.2810
7.137
0.2810
9.525
0.3750
mm
in.
0.38
0.015
0.38
0.015
0.38
0.015
0.38
0.015
0.38
0.015
0.38
0.015
0.38
0.015
0.38
0.015
0.38
0.015
0.38
0.015
4556
71.438
2.8125
88.900
3.500
7.938
0.3125
9.525
0.3750
0.38
0.015
4962
77.788
3.0625
98.425
3.8750
7.938
0.3125
9.525
0.3750
0.38
0.015
1017
1219
1421
1724
2128
2532
2936
3342
3746
4152
(1)
Ball Complement
Width
Equal Width
Rings
Wi and Wo
r
r is the maximum radius of shaft or housing fillet that bearing corner will clear.
Ball
Quantity
Load Ratings
Radial Static
Ball
Diameter
Steel
Ceramic
Hybrid
Dynamic
mm
in.
3.18
1/8
3.18
1/8
3.18
1/8
3.18
1/8
3.18
1/8
3.18
1/8
3.18
1/8
3.18
1/8
3.18
1/8
4.76
3/16
N
lbf
1520
342
1566
352
1871
421
2472
556
2815
633
3437
773
4062
913
4701
1057
5033
1131
8231
1850
N
lbf
978
220
1009
227
1206
271
1595
359
1817
408
2220
499
2624
590
3037
683
3253
731
5333
1199
N
lbf
2836
638
2782
625
3016
678
3447
775
3548
798
3856
867
4131
929
4340
976
4391
987
8161
1835
28
4.76
3/16
8933
2008
5789
1301
8384
1885
32
4.76
3/16
10299
2315
6675
1501
8907
2002
12
12
14
18
20
24
28
32
34
26
28
S
1017
M
H
7
P38
L01
1 2 3 4 5 6 7
Fig. 8a. Family 8 part number.
Family 8
Thin-section/
torque-tube,
angular-contact
series
To build your TSO part number
in this family of bearings, follow
the steps shown here.
Step 1
Specify Material Code
Step 5
Specify Tolerance
The majority of bearings listed under
this family are manufactured from either
440C stainless-steel or 52100 steel.
The applicable ABEC class is noted for
each basic bearing listed in table 8a.
Step 2
Specify Size
Step 6
Specify Radial Internal
Clearance
Boundary dimensions for all bearings
included in this family are shown in
table 8b and table 8c.
See table 8a for standard radial internal
clearances for this family. Alternate
radial clearance ranges are available.
Step 3
Specify Retainer Type
Step 7
Specify Any Supplementary
Requirements
The standard retainer type for each
basic bearing is shown in table 8a.
Other retainer types may be applied.
Common supplemental requirements
are shown in table 8a.
Step 4
Specify Feature (shields)
The standard feature codes for each
basic bearing are shown in table 8a.
Table 8a.
Material
C = 52100 chromium-alloy
steel rings and balls
D = 52100 chromium-alloy
steel rings and titaniumcarbide coated balls
E = 52100 chromium-alloy
steel rings and siliconnitride balls
S = 440C stainless-steel
rings and balls
T = 440C stainless-steel
rings and titaniumcarbide coated balls
Size
See
tables
8b & 8c
Retainer Type
M = one piece, machined,
through hole, phenolic
MR = full ball complement
(no retainer used)
MS = one piece, stamped,
through hole, SST
MSO = toroid separators,
Teflon
MST = slug separators, Teflon
MT = one piece, machined,
through hole,
aluminum bronze
Feature
E = wide inner
ring
Tolerance
3 = class 3
5 = ABEC 5P,
5T or 5F
(ABEC 5P
for 610
and 812
sizes)
7 = ABEC 7P,
7T or 7F
(ABEC 7P
for 610
and 812
sizes)
Radial Internal
Clearance
For angular contact bearings,
standard radial internal
clearances are:
Ball Standard
Size Radial Play (in.)
Supplementary
if Required
Lubricant other
than standard
Specific torque
requirement
1/16”, 3/32” 0.0003-0.0008 P38 Bore & O.D.
size coding
1/8” and 0.0007-0.0012 P712
larger
Duplex pair
designation
Contact angle 30˚ Nominal
P_ _ = indicates alternate
radial clearance(1)
U = 440C stainless-steel rings
and silicon-nitride balls
P followed by 2 to 4 digits indicates radial internal clearance range. For example our standard radial
internal clearance of P28 indicates a radial internal clearance of 0.0002 to 0.0008 in. Alternate radial
internal clearance ranges are available. For radial internal clearance ranges outside the standard
range or less than half this range, consult your Timken sales engineer.
(1)
W
W
W
FW
r
r
r
FD
B
B
WO
Fig. 8b. Non-flanged
equal
width.
Broken
Corners
r
D
D
B
B
FD
r
r
D
D
FD
Fig. 8c. Non-flanged extended inner.
Broken Corners
WI
WO
FW
r
r
D
D
29
WI
WO
WI
WO
FW
D
B
WI
W
B
B
Broken Corners
D
FD
B
Broken Corners
Non-Flanged Equal Width
Equal WidthFlanged Equal
Non-Flanged
Flanged
Non-FlangedFlanged
Equal Width
Width
Non-Flanged Wide
Inner
Flanged Wide Inner
Extendedseries
Inner instrument Extended
Inner
Table 8b. Boundary dimensions, thin-section, angular-contact
ball bearings
Diameters
Chassis
610
812
1014
1216
1418
1622
1721
2024
2226
2428
2430
2630
3240
3242
4048
4050
4856
4858
5664
5666
6472
64-74
64-76
64-80
68-76
68-78
(1)
Bore
O.D.
B
D
mm
in.
9.525
0.3750
12.700
0.5000
15.875
0.6250
19.050
0.7500
22.225
0.8750
25.400
1.0000
26.988
1.0625
31.750
1.2500
34.925
1.3750
38.100
1.5000
38.100
1.5000
41.275
1.6250
50.800
2.0000
50.800
2.0000
63.500
2.5000
63.500
2.5000
76.200
3.0000
76.200
3.0000
88.900
3.5000
88.900
3.5000
101.600
4.0000
101.600
4.0000
101.600
4.0000
101.600
4.0000
107.950
4.2500
107.950
4.2500
mm
in.
15.875
0.6250
19.050
0.7500
22.225
0.8750
25.400
1.0000
28.575
1.1250
34.925
1.3750
33.338
1.3125
38.100
1.5000
41.275
1.6250
44.450
1.7500
47.625
1.8750
47.625
1.8750
63.500
2.5000
66.675
2.6250
76.200
3.0000
79.375
3.1250
88.900
3.5000
92.075
3.6250
101.600
4.0000
104.775
4.1250
114.300
4.5000
117.475
4.6250
120.650
4.7500
127.000
5.0000
120.650
4.7500
123.825
4.8750
Width
Radius(1)
W
r
mm
in.
3.962
0.1560
3.962
0.1560
3.962
0.1560
3.962
0.1560
3.962
0.1560
4.763
0.1875
3.962
0.1560
3.962
0.1560
3.962
0.1560
3.962
0.1560
4.763
0.1875
3.962
0.1560
6.350
0.2500
7.938
0.3125
6.350
0.2500
7.938
0.3125
6.350
0.2500
7.938
0.3125
6.350
0.2500
7.938
0.3125
6.350
0.2500
7.938
0.3125
9.525
0.3750
12.700
0.5000
6.350
0.2500
7.938
0.3125
mm
in.
0.25
0.010
0.25
0.010
0.25
0.010
0.25
0.010
0.25
0.010
0.38
0.015
0.25
0.010
0.25
0.010
0.25
0.010
0.25
0.010
0.38
0.015
0.25
0.010
0.64
0.025
1.02
0.040
0.64
0.025
1.02
0.040
0.64
0.025
1.02
0.040
0.64
0.025
1.02
0.040
0.64
0.025
1.02
0.040
1.02
0.040
1.52
0.060
0.64
0.025
1.02
0.040
r is the maximum radius of shaft or housing fillet that bearing corner will clear.
Ball Complement
Ball
Quantity
16
21
24
30
32
28
38
44
48
52
40
56
42
34
52
42
62
50
70
58
80
66
54
47
86
63
Ball
Diameter
Radial Static
Steel
mm
in.
1.59
1/16
1.59
1/16
1.59
1/16
1.59
1/16
1.59
1/16
2.38
3/32
1.59
1/16
1.59
1/16
1.59
1/16
1.59
1/16
2.38
3/32
1.59
1/16
3.18
1/8
3.97
5/32
3.18
1/8
3.97
5/32
3.18
1/8
3.97
5/32
3.18
1/8
3.97
5/32
3.18
1/8
3.97
5/32
4.76
3/16
6.35
1/4
3.18
1/8
3.97
5/32
mm
in.
386
87
528
119
619
139
789
177
852
192
2197
494
1028
231
1203
270
1320
297
1436
323
3252
731
1553
349
6035
1357
7515
1689
7587
1706
9453
2125
9141
2055
11395
2562
9635
2166
11987
2695
11078
2490
13750
3091
15752
3541
22339
5022
11938
2684
14210
3195
Load Ratings
Radial Static
Ceramic
Hybrid
N
lbf
244
55
335
75
393
88
500
112
541
122
1423
320
652
147
764
172
838
188
913
205
2108
474
987
222
3872
870
4862
1093
4869
1095
6119
1376
5868
1319
7378
1659
6029
1355
7482
1682
6933
1559
8579
1929
9807
2205
13962
3139
7472
1680
8867
1993
Radial
Dynamic
N
lbf
827
186
947
213
993
223
1108
249
1118
251
2610
587
1196
269
1266
285
1308
294
1348
303
3017
678
1386
312
5189
1166
7143
1606
5654
1271
7800
1753
6059
1362
8369
1881
5928
1333
8195
1842
6245
1404
8617
1937
10899
2450
17015
3825
6443
1449
8646
1944
Continued on next page.
30
Table 8b continued.
Table 8b. Boundary dimensions, thin-section, angular-contact series instrument ball bearings
Diameters
Chassis
68-80
68-84
72-80
72-82
72-84
72-88
76-84
76-86
76-88
76-92
80-88
80-90
80-92
80-96
88-96
Bore
O.D.
B
D
mm
in.
107.950
4.2500
107.950
4.2500
114.300
4.5000
114.300
4.5000
114.300
4.5000
114.300
4.5000
120.650
4.7500
120.650
4.7500
120.650
4.7500
120.650
4.7500
127.000
5.0000
127.000
5.0000
127.000
5.0000
127.000
5.0000
139.700
5.5000
mm
in.
127.000
5.0000
133.350
5.2500
127.000
5.0000
130.175
5.1250
133.350
5.2500
139.700
5.5000
133.350
5.2500
136.525
5.3750
139.700
5.5000
146.050
5.7500
139.700
5.5000
142.875
5.6250
146.050
5.7500
152.400
6.0000
152.400
6.0000
Width
Radius(1)
W
r
mm
in.
9.525
0.3750
12.700
0.5000
6.350
0.2500
7.938
0.3125
9.525
0.3750
12.700
0.5000
6.350
0.2500
7.938
0.3125
9.525
0.3750
12.700
0.5000
6.350
0.2500
7.938
0.3125
9.525
0.3750
12.700
0.5000
6.350
0.2500
mm
in.
1.02
0.040
1.52
0.060
0.64
0.025
1.02
0.040
1.02
0.040
1.52
0.060
0.64
0.025
1.02
0.040
1.02
0.040
1.52
0.060
0.64
0.025
1.02
0.040
1.02
0.040
1.52
0.060
0.64
0.025
Ball Complement
Ball
Quantity
58
44
90
72
62
46
94
76
64
50
100
80
68
52
110
Ball
Diameter
Radial Static
Steel
mm
in.
4.76
3/16
6.35
1/4
3.18
1/8
3.97
5/32
4.76
3/16
6.35
1/4
3.18
1/8
3.97
5/32
4.76
3/16
6.35
1/4
3.18
1/8
3.97
5/32
4.76
3/16
6.35
1/4
3.18
1/8
mm
in.
16980
3817
23510
5285
12522
2815
15087
3392
18209
4094
24681
5548
13104
2946
15965
3589
18852
4238
26927
6053
13966
3140
16842
3786
20083
4515
28098
6317
15411
3465
Load Ratings
Radial Static
Ceramic
Hybrid
N
lbf
10572
2377
14697
3304
7838
1762
9415
2117
11339
2549
15430
3469
8203
1844
9964
2240
11740
2639
16837
3785
8743
1965
10512
2363
12508
2812
17571
3950
9648
2169
Radial
Dynamic
N
lbf
11248
2529
17286
3886
6536
1469
8842
1988
11581
2604
17549
3945
6627
1490
9031
2030
11657
2621
18295
4113
6806
1530
9213
2071
11970
2691
18531
4166
7059
1587
Table 8c. Boundary dimensions, thin-section, angular-contact series instrument ball bearings
Diameters
Chassis
1017
1219
1421
1724
2128
2532
2936
3342
3746
4152
4556
4962
(1)
Bore
O.D.
B
D
mm
in.
15.875
0.6250
19.050
0.7500
22.225
0.8750
26.988
1.0625
33.338
1.3125
39.688
1.5625
46.038
1.8125
52.388
2.0625
58.738
2.3125
65.088
2.5625
71.438
2.8125
77.788
3.0625
mm
in.
26.988
1.0625
30.163
1.1875
33.338
1.3125
38.100
1.5000
44.450
1.7500
50.800
2.0000
57.150
2.2500
66.675
2.6250
73.025
2.8750
82.550
3.2500
88.900
3.5000
98.425
3.8750
Width
Extended
Equal Width
Inner Ring
Rings
Wi
Wi and Wo
mm
mm
in.
in.
6.350
7.137
0.2500
0.2810
6.350
7.137
0.2500
0.2810
6.350
7.137
0.2500
0.2810
6.350
7.137
0.2500
0.2810
6.350
7.137
0.2500
0.2810
6.350
7.137
0.2500
0.2810
6.350
7.137
0.2500
0.2810
6.350
7.137
0.2500
0.2810
6.350
7.137
0.2500
0.2810
7.938
9.525
0.3125
0.3750
7.938
9.525
0.3125
0.3750
7.938
9.525
0.3125
0.3750
Radius(1)
r
mm
in.
0.38
0.015
0.38
0.015
0.38
0.015
0.38
0.015
0.38
0.015
0.38
0.015
0.38
0.015
0.38
0.015
0.38
0.015
0.38
0.015
0.38
0.015
0.38
0.015
r is the maximum radius of shaft or housing fillet that bearing corner will clear.
Ball Complement
Ball
Quantity
16
18
20
24
28
34
38
44
48
36
39
42
Ball
Diameter
mm
in.
3.18
1/8
3.18
1/8
3.18
1/8
3.18
1/8
3.18
1/8
3.18
1/8
3.18
1/8
3.18
1/8
3.18
1/8
4.76
3/16
4.76
3/16
4.76
3/16
Load Ratings
Radial Static
Radial Static
Ceramic
Steel
Hybrid
N
N
lbf
lbf
1986
1269
446
285
2302
1472
518
331
2621
1677
589
377
3232
2070
727
465
3865
2477
869
557
4778
3063
1074
689
5409
3469
1216
780
6343
4069
1426
915
6974
4475
1568
1006
11547
7521
2596
1691
12606
8212
2834
1846
13694
8923
3079
2006
Radial
Dynamic
N
lbf
3398
764
3603
810
3780
850
4124
927
4384
986
4801
1079
4998
1124
5296
1191
5453
1226
10220
2298
10542
2370
10765
2420
31
C
2128
B
S
*
5
P712 DB30
1 2 3 4 5 6 7 8
Fig. 9a. Family 9 part number.
* - nil, leave no space
Family 9
Thin-section/
torque-tube,
fractured-race
series
To build your TSO part number
in this family of bearings, follow
the steps shown here.
Step 1
Specify Material Code
Step 5
Specify Features
Go to table 9a. The majority of
bearings listed under this family
are manufactured from either 440C
stainless-steel or 52100 steel.
Feature option is shown in table 9a.
Step 6
Specify Tolerance
The applicable ABEC class is noted for
each basic bearing listed in table 9a.
Step 2
Specify Size
Boundary dimensions for all bearings
included in this family are shown in
tables 9b and 9c.
Step 7
Specify Radial Internal
Clearance
Step 3
Specify Bearing Type (shields)
See table 9a for standard radial internal
clearances for this family. Alternate
radial clearance ranges are available.
Choice of shield options is shown in
table 9a.
Step 4
Specify Retainer Type
The standard retainer type for each
basic bearing is shown in table 9a.
Other retainer types may be applied.
Step 8
Specify Any Supplementary
Requirements
Common supplemental requirements
are shown in table 9a.
Table 9a.
Material
Size
C = 52100 chromium-alloy
steel rings and balls
See
tables
9b &
9c
D = 52100 chromium-alloy
steel rings and
titanium-carbide
coated balls
E = 52100 chromium-alloy
steel rings and siliconnitride balls
S = 440C stainless-steel
rings and balls
T = 440C stainless-steel
rings and titaniumcarbide coated balls
U = 440C stainless-steel
rings and siliconnitride balls
Bearing
Type
B = fractured
outer ring
BI = fractured
outer
ring,
integral
shields
Retainer Type
M = one piece, machined,
through hole, phenolic
MT = one piece, machined,
through hole,
Aluminum Bronze
S = one piece, stamped,
through hole,
stainless-steel
SO = toroid separators,
Teflon
ST = slug separators,
Teflon
Feature
E = wide
inner
ring
Radial Internal
Clearance
3 = class 3
For fractured race bearings,
standard radial internal
5 = ABEC 5P,
clearances are:
5T or 5F
Ball Standard
(ABEC 5P
Size Radial Play (in.)
for 610
and 812 1/16”, 3/32” 0.0003-0.0008 P38
1/8” and 0.0005-0.0015 P515
sizes)
larger
7 = ABEC 7P,
P_ _ = indicates alternate
7T or 7F
(1)
(ABEC 7P radial clearance
for 610
and 812
sizes)
Tolerance
Supplementary
if Required
Lubricant
other than
standard
Specific
torque
requirement
Bore & O.D.
size coding
Duplex pair
designation
No = Full complement
code = (no retainer used)
“P followed by 2 to 4 digits indicates radial internal clearance range. For example our standard radial
internal clearance of P28 indicates a radial internal clearance of 0.0002 to 0.0008 in. Alternate radial
internal clearance ranges are available. For radial internal clearance ranges outside the standard
range or less than half this range, consult your Timken sales engineer.
(1)
32
W
W
r
r
WO
WO
r
r
D
D
B
WI
FW
W FW
W
WI
FD
B
r
B
FD
Fig. 9b. Non-flanged equal width.
B
FD
Fig. 9c. Non-flanged extended inner.
Broken Corners
Broken Corners
r
r
D
D
B
WO
FW
r
D
D
WI
WI
WO
B
B
Broken Corners
Non-FlangedFlanged
Equal Width
Width
Non-Flanged Wide
Inner
Non-Flanged Equal Width
Equal WidthFlanged Equal
Non-Flanged
Flanged
Extended
Inner
Extended
Inner
Table 9b. BoundAry dimensions, thin-section, fractured-race,
instrument ball bearings
Diameters
Ball
Diameter
Radial Static
Steel
mm
in.
N
lbf
Load Ratings
Radial Static
Ceramic
Hybrid
N
lbf
24
1.59
1/16
579
130
366
82
1084
244
0.25
0.010
31
1.59
1/16
779
175
494
111
1228
276
3.962
0.1560
0.25
0.010
37
1.59
1/16
955
215
605
136
1325
298
3.962
0.1560
0.25
0.010
43
1.59
1/16
1130
254
717
161
1409
317
Width
Radius(1)
Wo
r
mm
in.
mm
in.
mm
in.
9.525
0.3750
15.875
0.6250
3.962
0.1560
0.254
0.010
812
12.700
0.5000
19.050
0.7500
3.962
0.1560
1014
15.875
0.6250
22.225
0.8750
1216
19.050
0.7500
25.400
1.0000
Bore
O.D.
B
D
mm
in.
610
Chassis
Ball Complement
Ball
Quantity
D
D
FD
Broken Corners
Flanged Wide Inner
Radial
Dynamic
N
lbf
Table 9c. BoundAry dimensions, torque-tube, fractured-race,
instrument ball bearings
Diameters
Ball
Diameter
Radial Static
Steel
mm
in.
N
lbf
Load Ratings
Radial Static
Ceramic
Hybrid
N
lbf
21
3.18
1/8
2589
582
1650
371
4058
912
0.38
0.015
24
3.18
1/8
3049
685
1945
437
4348
977
7.137
0.2810
0.38
0.015
27
3.18
1/8
3515
790
2244
504
4598
1034
6.350
0.2500
7.137
0.2810
0.38
0.015
32
3.18
1/8
4282
963
2736
615
4975
1118
44.450
1.7500
6.350
0.2500
7.137
0.2810
0.38
0.015
38
3.18
1/8
5213
1172
3332
749
5351
1203
39.688
1.5625
50.800
2.0000
6.350
0.2500
7.137
0.2810
0.38
0.015
44
3.18
1/8
6144
1381
3930
884
5676
1276
2936
46.038
1.8125
57.150
2.2500
6.350
0.2500
7.137
0.2810
0.38
0.015
50
3.18
1/8
7073
1590
4525
1017
5975
1343
3342
52.388
2.0625
66.675
2.6250
6.350
0.2500
7.137
0.2810
0.38
0.015
58
3.18
1/8
8309
1868
5319
1196
6339
1425
3746
58.738
2.3125
73.025
2.8750
6.350
0.2500
7.137
0.2810
0.38
0.015
64
3.18
1/8
9241
2078
5916
1330
6577
1479
4152
65.088
2.5625
82.550
3.2500
7.938
0.3125
9.525
0.3750
0.38
0.015
48
4.76
3/16
15328
3446
9966
2240
12347
2776
4556
71.438
2.8125
88.900
3.5000
7.938
0.3125
9.525
0.3750
0.38
0.015
52
4.76
3/16
16734
3762
10882
2446
12736
2863
4962
77.788
3.0625
98.425
3.8750
7.938
0.3125
9.525
0.3750
0.38
0.015
58
4.76
3/16
18829
4233
12247
2753
13313
2993
Radius(1)
O.D.
B
D
mm
in.
mm
in.
1017
15.875
0.6250
26.988
1.0625
6.350
0.2500
7.137
0.2810
0.38
0.015
1219
19.050
0.7500
30.163
1.1875
6.350
0.2500
7.137
0.2810
1421
22.225
0.8750
33.338
1.3125
6.350
0.2500
1724
26.988
1.0625
38.100
1.5000
2128
33.338
1.3125
2532
Chassis
(1)
Width
Extended
Equal Width
Inner Ring
Rings
Wi
Wi and Wo
mm
mm
in.
in.
Bore
r
Ball Complement
Ball
Quantity
mm
in.
r is the maximum radius of shaft or housing fillet that bearing corner will clear.
B
Radial
Dynamic
N
lbf
33
Appendix
Codes for use
in TSO part
specification
Lubrication:
LD no lubrication or dry bearings.
LO followed by a number indicates specified oil
lubrication.
LG followed by a number indicates other specified
grease lubrication.
LY followed by a number indicates other Timkenapproved lubricants.
LOV or LYV followed by a number indicates specified
oil to be vacuum impregnated into the retainer.
LOC or LYC followed by a number indicates specified
oil to be used and the bearing centrifuged.
LGF or LYF followed by a number indicates film of a
specific grease.
Standard
Lubrication is
dip and drain
with Timken
LO1 lubricant.
Torque: (Applicable to miniature sizes):
Q Q followed by a number indicates peak starting torque
limit in hundreds of mg•mm. For example, Q14 indicates a
bearing with less than 1400 mg•mm peak starting torque.
V V followed by a number indicates peak running torque
limit in hundreds of mg•mm. For example, V13 indicates a
bearing with less than 1300 mg•mm peak running torque.
Torque is measured under a 75 gram thrust load for bearings having an O.D. of 3/8 in. or less. Larger cataloged
bearings are measured under a test load of 400 grams.
Preloaded Pairs:
DB back-to-back mounting
DF face-to-face mounting
DT tandem mounting
Numbers following letter code
indicate nominal preload or preload range
in pounds.
Dimensional Coding:
ZO graded O.D.’s only
ZB graded bores only
ZD graded O.D.’s and bores
ZDM graded for preloaded pairs
having matched O.D.’s and
bores
Standard dimensional grading is in
increments of 0.0001 in. “X” prefix for
0.000050 in. increments.
Bearings • Steel •
Power Transmission Systems •
Precision Components • Seals •
Lubrication • Industrial Services •
Remanufacture and Repair
www.timken.com
06-11: Order No. 10454
Timken® and Where You Turn® are registered trademarks of The Timken Company • © 2011 The Timken Company • Printed in U.S.A.
34
Timken
FAA-TSO C-149
2
Table of Contents
Introduction ............................................................................................................................ 3
Miniature and Instrument Aircraft Bearing Classification .......................................... 4
Thin-Section and Torque-Tube Aircraft Bearing Classification .................................. 6
Miniature and Thin-Section Nomenclature......................................................................8
Bearing Family 1
Deep-groove, radial-retainer, inch and metric design................................................. 11
Bearing Family 2
Angular-contact, non-separable ..................................................................................... 14
Bearing Family 3
Angular-contact, separable .............................................................................................. 17
Bearing Family 4
Deep-groove, full-complement ........................................................................................ 19
Bearing Family 5
Deep-groove, radial-retainer, narrow series ................................................................ 21
Bearing Family 6
Deep-groove, radial-retainer, modified dimension ...................................................... 23
Bearing Family 7
Thin-section/torque-tube, Conrad series ...................................................................... 25
Bearing Family 8
Thin-section/torque-tube, angular-contact series ...................................................... 28
Bearing Family 9
Thin-section/torque-tube, fractured-race series ........................................................ 31
Appendix ............................................................................................................................... 33
3
Introduction
This part number guide is designed to help you identify and specify Timken
bearings available under the Federal Aviation Administration (FAA) Technical
Standard Order (TSO) C-149. This often is a replacement for an original part. By following
the steps within this guide, you may determine a suitable bearing for your specific
application. As always, your Timken sales engineer is only a phone call away.
Warning
Failure to observe the following warnings could
create a risk of death or serious injury.
Proper maintenance and handling practices are critical.
Always follow installation instructions and
maintain proper lubrication.
4
Miniature and Instrument Aircraft Bearing Classification
Fig. I. FAA approval letter – families 1-6.
Miniature- and instrument-type aircraft bearings are divided into six families in this
guide. Specific part number, boundary dimension, design properties and performance
properties for each family are defined in the tables. To begin specification of a part,
determining the appropriate family by visual identification or typical application is
helpful.
Family 1 – Deep-groove, radial-retainer, inch and metric design
Family 2 – Angular-contact, non-separable
Family 3 – Angular-contact, separable
Family 4 – Deep-groove, full-complement
Family 5 – Deep-groove, radial-retainer, narrow series
Family 6 – Deep-groove, radial-retainer, modified dimension
5
Family 1
Family 2
Family 3
Family 4
Family 5
Family 6
Fig. II. Miniature and instrument bearing family visual identification.
table I. Miniature and instrument typical applications
Typical Applications
Air data sensor
Family
1
Family
2
X
APU intake door actuator
Family
3
Family
4
Family
5
Family
6
Note
X
X
X
X
Control column stall warning shaker
X
X
Controller mechanism
X
X
Differential assembly servo
X
X
Elec. mech. rotary actuator flow meter
X
X
Front angle of attack synchro
X
X
Fuel control
X
X
Fuel control comp. discharge
X
X
Fuel control comp. discharge press sensor
X
X
Fuel flow indicator
X
X
Fuel flow transmitter
X
Gear train assembly servo
X
General aviation directional & attitude gyros
X
Horizon situation indicator (HIS)
X
X
X
X
X
X
X
Lift transducer
X
X
Mech. assembly inlet TX
X
X
Overboard air exhaust valve
X
X
Power failure detector motor press sensor
X
Pressure outflow control valve
X
X
X
X
Receiver synchro
X
X
Servo
X
X
Rate gyro
X
X
Tachometer motor
X
Vertical gyro
X
X
X
Note: Components often fall into multiple families, and some may not be listed here. If your component does not appear to match a typical family or appears
visually different, contact your Timken sales engineer for assistance.
6
Thin-Section and Torque-Tube Instrument Classification
Fig. III. FAA approval letter – families 7-9.
Thin-section and torque-tube instrument ball-type aircraft bearings are divided into
three families in this drawing. Specific part number, boundary dimension, design
properties and performance properties for each family are defined in the drawing
supplements. To begin specification of a part, determining the appropriate family by
visual identification or typical application is required.
Family 7 – Thin-section/torque-tube, Conrad series
Family 8 – Thin-section/torque-tube, angular-contact series
Family 9 – Thin-section/torque-tube, fractured-race series
Family 7
Family 8
Family 9
Fig. IV. Thin-section and torque-tube bearing family visual identification.
7
table II. thin-section and torque-tube typical applications
Typical Applications
Family
7
Family
8
Family
9
Note
Air mix valve
X
APU
X
APU alternator drive pads
X
APU fan shaft
X
APU generator pad
X
APU H.P. shaft compressor
X
APU high-speed pinion
X
APU L.P. compressor
X
APU main shaft roller
X
APU mainshaft
X
APU starter & fuel control idler
X
APU starter pad
X
APU starter shaft
X
APU tower shaft
X
APU tower shaft & idler
X
APU turbine
X
APU turbine, HP & LP
X
Auxiliary hydraulic pump system
X
Carousel
X
Constant speed drive
X
Elevator feel control arm assembly
X
Engine thrust reverser - actuator
Flap actuator
X
X
X
X
X
Fuel control
X
Generator pad
X
Integrated drive generator
X
JT3D engine
JT9D engine fuel control
X
X
X
Leading edge actuator
X
Pneumatic starter JT9D engine
X
Roller transmission assembly
X
Shut-off valve
X
Thrust reverser
X
Thrust reverser actuator
X
Track roller, turbine thrust reverser
X
Note: Components often fall into multiple families, and some may not be listed here. If your component does not appear to match
a typical family or appears visually different, contact your Timken sales engineer for assistance.
8
Miniature Bearing Part Numbering for Families 1 through 6
Material:
S
AISI 44C stainless-steel
C SAE 52100 chrome steel
U AISI 440C SST + ceramic balls
E SAE 52100 + ceramic balls
N Beryillum Copper
Features:
H
single shield
HH double shield
Z single seal
ZZ double seal
E extended inner ring(1)
(1)
This symbol, indicating variations
in dimensions may appear following other feature codes above.
Radial Play:
P P followed by numbers indicates radial play
range in ten-thousandths of an inch.
Examples:
P28 indicates radial play of 0.0002 in. to 0.0008 in.
P58 indicates radial play of 0.0005 in. to 0.0008 in.
P515 indicates radial play of 0.0005 in. to 0.0015 in.
Flange:
F
flanged bearing,
miniature product
S 418
F
S R4A
– MC – 5 P38
Bearing Size:
This number designates the
basic envelope dimensions
of the bearing.
Type:
Torque: (Applicable to miniature sizes)
Q Q followed by a number indicates peak starting torque
limit in hundreds of mg•mm.
For example, Q14 indicates a bearing with less than
1400 mg•mm peak starting torque.
V V followed by a number indicates peak running torque
limit in hundreds of mg•mm.
For example, V13 indicates a bearing with less than
1300 mg•mm peak running torque. Torque is measured
under a 75 gram thrust load for bearings having an
O.D. of 3/8 in. or less. Larger cataloged bearings are
measured under a test load of 400 grams.
C
H 7
–
Preloaded Pairs:
DB back-to-back mounting
DF face-to-face mounting
DT tandem mounting
Numbers following letter code
indicate nominal preload or
preload range in pounds.
LG31 Q13 –
LYC5
– ZDM DB10
Tolerance:
5
ABEC 5P
7
ABEC 7P
No Symbol full ball complement
C crown-type stainless-steel retainer
M non-separable, phenolic retainer
MB separable inner ring, phenolic retainer
MC one-piece snap-type phenolic retainer
MCJ one-piece snap-type self-lubricating retainer
MCK one-piece molded snap-type Minapar II® retainer
MCX one-piece snap-type self-lubricating retainer
MR non-separable, full ball complement
R ribbon-type stainless-steel retainer
Lubrication:
–
LD no lubrication or dry bearings
L0 followed by a number indicates
specified oil lubrication
LG followed by a number indicates
other specified grease lubrication
LY followed by a number indicates
other Timken-approved lubricants
L0V or LYV followed by a number
indicates specified oil to be vacuum
impregnated into the retainer
L0C or LYC followed by a number
indicates specified oil to be used
and the bearing centrifuged
LGF or LYF followed by a number
indicates film of a specific grease
Dimensional Coding:
Z O graded O.D.’s only
Z B graded bores only
Z D graded O.D.’s and bores
Z DM graded for preloaded pairs
having matched O.D.’s
and bores
Standard dimensional grading is in
increments of 0.0001 in. “X” prefix
for 0.000050 in. increments
9
Thin-Section Bearing Part Numbering for Families 7 through 9
Features 2:
H
single shield
HH double shield
Z single seal
ZZ double seal
E extended inner ring(1)
(1)
This symbol, indicating variations
in dimensions may appear following other feature codes above.
Material:
S
AISI 44C stainless-steel
C SAE 52100 chrome steel
U AISI 440C SST + ceramic balls
E SAE 52100 + ceramic balls
Features 1:
B
fractured outer ring
I
integral shield
A
alternate undersize ball
S 88-100 BI
S
Torque: (Applicable to miniature sizes)
Q Q followed by a number indicates peak starting torque
limit in hundreds of mg•mm.
For example, Q14 indicates a bearing with less than
1400 mg•mm peak starting torque.
V V followed by a number indicates peak running torque
limit in hundreds of mg•mm.
For example, V13 indicates a bearing with less than
1300 mg•mm peak running torque. Torque is measured
under a 75 gram thrust load for bearings having an
O.D. of 3/8 in. or less. Larger cataloged bearings are
measured under a test load of 400 grams.
Radial Play:
P P followed by numbers indicates radial play
range in ten-thousandths of an inch.
P000 P000 indicates standard contact angle
P000 P000 followed by numbers in parenthesis
indicates contact angle range
Examples:
P28 indicates radial play of 0.0002 in. to 0.0008 in.
P000(515) indicates contact angle of 5˚ to 15˚
H 7 P000 LG31 Q13 –
S 1014 – MC – 5 P38
Bearing Size:
This number designates the
basic envelope dimensions
of the bearing.
Type:
Preloaded Pairs:
DB back-to-back mounting
DF face-to-face mounting
DT tandem mounting
Numbers following letter code
indicate nominal preload or
preload range in pounds.
LYC5
– ZDM DB10
Tolerance:
5
ABEC 5P(1), 5T, or 5F
7
ABEC 7P(1), 7T, or 7F
depending on ring size
(1)
applicable to sizes
No Symbol full ball complement
M non-separable, phenolic retainer
MC one-piece snap-type phenolic retainer
MCK one-piece molded snap-type Minapar II® retainer
MR non-separable, full ball complement
MSO angular contact, non-separable, PTFE toroids
MT angular contact, non-separable aluminum
bronze retainer
ST PTFE slug separators
MCT one-piece snap-type aluminum bronze retainer
MS angular contact, non-separable stainless-steel
retainer
S angular contact, non-separable stainless-steel
retainer
Lubrication:
–
LD no lubrication or dry bearings
L0 followed by a number indicates
specified oil lubrication
LG followed by a number indicates
other specified grease lubrication
LY followed by a number indicates
other Timken-approved lubricants
L0V or LYV followed by a number
indicates specified oil to be vacuum
impregnated into the retainer
L0C or LYC followed by a number
indicates specified oil to be used
and the bearing centrifuged
LGF or LYF followed by a number
indicates film of a specific grease
Dimensional Coding:
Z O graded O.D.’s only
Z B graded bores only
Z D graded O.D.’s and bores
Z DM graded for preloaded pairs
having matched O.D.’s
and bores
Standard dimensional grading is in
increments of 0.0001 in. “X” prefix
for 0.000050 in. increments
10
S
R3
F
MC
E
7
P28
L01
1 2 3 4 5 6 7 8
Fig. 1a. Family 1 part number example.
Family 1
Deep-groove,
radial-retainer,
inch and metric
design
To build your TSO part number in
this family of bearings, follow the
Step 1
Specify Material Code
Step 4
Specify Retainer Type
Go to table 1a. The majority of bearings
listed under this family are manufactured
from either 440C stainless steel or 52100
steel.
The standard retainer type for each
basic bearing is shown in table 1a. Other
retainer types listed in the table may be
applied.
•• For the example, we will choose “U,” •• We will choose a one-piece,
which is 440C rings and siliconnitride balls.
steps shown here. Detailed steps are
provided for this family to aid you in
the specification process.
Step 2
Specify Size
Boundary dimensions for all bearings
included in this family are shown in tables
1b and 1c.
machined, snap-type crown,
phenolic, so we add “MC” to our
part number.
Step 5
Specify Features
Table 1a shows designations for seals,
shields and other features.
•• For this example, we will determine
•• For our example, we will choose a
Step 3
Specify Flange
Step 6
Specify Tolerance
Bearings that are flanged have the flange
diameter and width noted in tables 1b and
1c; all others are not flanged.
The available ABEC classes are noted for
each basic bearing in table 1a.
that basic size “R3” meets our
required boundary dimensions.
••
Our “R3” bearing does have a flange,
so an “F” is noted.
wide inner ring and add designation
“E” to the part number.
•• Our example bearing will be
“ABEC 7,” so we will add a “7” to
the part number.
11
Step 7
Specify Radial Internal
Clearance
Step 8
Specify Any Supplementary
Requirements
Standard radial clearance of 0.0051 mm to
0.0203 mm (0.0002 in. to 0.0008 in.) applies
to this family. Alternate radial clearance
ranges are available.
Possible supplemental options are shown
in table 1a. Coding for the possible options
may be found in the Appendix (page 31).
•• Our bearing will have standard
clearance, with part number
code “P28.”
•• We will specify a duplex pair with
back-to-back mounting. This is
added to the part number as “DB.”
Table 1a.
Material
Size
C = 52100 chromiumalloy steel rings
and balls
See
tables
1b &
1c
D = 52100 chromiumalloy steel rings
and titaniumcarbide coated
balls
E = 52100 chromiumalloy steel rings
and siliconnitride balls
S = 440C stainlesssteel rings and
balls
T = 440C stainlesssteel rings and
titanium-carbide
coated balls
U = 440C stainlesssteel rings and
silicon-nitride
balls
Flange
F = flanged
bearing
No = noncode flanged
bearing
Retainer Type
C = one-piece, pressed,
snap-type crown,
stainless-steel
MC = one-piece,
machined, snap-type
crown, phenolic
MCD = one-piece,
machined, snap-type
crown, acetal resin
MCJ = one-piece,
machined,
snap-type crown,
PGM-HT
MCK = one-piece, molded,
snap-type crown,
glass reinforced
nylon
Feature
H = single shield
5 = ABEC 5P
HH = double shield
7 = ABEC 7P
Z = single seal
ZZ = double seal
E = wide inner
ring
OH = single shield
on side
opposite
flange
OZ = single seal on
side opposite
flange
No = open bearing
Code (no shields or
seals)
MCP = one-piece, machined,
snap-type crown,
Salox M
R = two-piece, pressed,
ribbon-type,
stainless-steel
ST = tube type, Teflon
(1)
Tolerance
P followed by 2 to 4 digits indicates radial internal clearance range. For example our standard radial
internal clearance of P28 indicates a radial internal clearance of 0.0002 to 0.0008 in. Alternate radial
internal clearance ranges are available. For radial internal clearance ranges outside the standard range
or less than half this range, consult your Timken sales engineer.
Radial Internal
Supplementary
Clearance
if Required
Lubricant
P28 = standard
other than
radial internal
standard
clearance of
0.0002 to 0.0008
Specific
in. (0.00508 to
torque
0.02032 mm)
requirement
P___ = indicates
Bore & O.D.
alternate radial
size coding
clearance(1)
Duplex pair
designation
12
WI
WO WO
FW FW
W W
r
r
B
r
r
D
D
B
FD FD
r
D
B
D
B
B
FD FD
Broken
Corners
Broken
Corners
Non-Flanged
Equal
Width
Non-Flanged
Width
Fig. 1b. Equal
Non-flanged
equal width.
r
r
D
D
B
WI
WO
FW
r
D
B
WO
WI WI
W W
D
B
Broken
Corners
Broken
Corners
Flanged
Equal
Width
Flanged
Equal
Width
Fig. 1c.
Flanged
equal width.
Non-Flanged
Non-Flanged
Inner
Fig. 1d.Wide
Non-flanged
Extended
extendedInner
inner.
Flanged
Wide
Inner
Fig.Flanged
1e. Flanged
Extended
extendedInner
inner.
Table 1b. Boundary dimensions, miniature and instrument ball bearings,
deep-groove, radial-retainer (inch)
Diameters
Basic
Size
2
25
3c
3r
4C
4R
3332c
3332chh
3332r
5
418c
418r
518
618
R2
R2A
5532
5632
6316
R3
614
814c
814r
R4
R4A
(1)
Open Bearings
Flange
O.D.
Bore
O.D.
B
D
mm
in.
1.016
0.0400
1.191
0.0469
1.397
0.0550
1.397
0.0550
1.984
0.0781
1.984
0.0781
2.380
0.0937
2.380
0.0937
2.380
0.0937
mm
in.
3.175
0.1250
3.967
0.1562
4.763
0.1875
4.763
0.1875
6.350
0.2500
6.350
0.2500
4.763
0.1875
4.763
0.1875
4.763
0.1875
mm
in.
4.343
0.1710
5.156
0.2030
5.944
0.2340
5.944
0.2340
7.518
0.2960
7.518
0.2960
5.944
0.2340
5.944
0.2340
5.944
0.2340
2.380
0.0937
3.175
0.1250
3.175
0.1250
3.175
0.1250
3.175
0.1250
3.175
0.1250
3.175
0.1250
3.967
0.1562
4.763
0.1875
4.763
0.1875
4.763
0.1875
6.350
0.2500
6.350
0.2500
6.350
0.2500
6.350
0.2500
6.350
0.2500
7.938
0.3125
6.350
0.2500
6.350
0.2500
7.938
0.3125
9.525
0.3750
9.525
0.3750
12.700
0.5000
7.938
0.3125
7.938
0.3125
9.525
0.3750
12.700
0.5000
9.525
0.3750
12.700
0.5000
12.700
0.5000
15.875
0.6250
19.050
0.7500
9.119
0.3590
7.518
0.2960
7.518
0.2960
9.119
0.3590
10.719
0.4220
11.176
0.4400
FD
N/A
9.119
0.3590
9.119
0.3590
10.719
0.4220
14.351
0.5650
10.719
0.4220
13.894
0.5470
13.894
0.5470
17.526
0.6900
N/A
Shielded Bearings
Equal Extended Flange
Equal Extended Flange
Width
Width
Inner
Inner
Width
Width
Rings
Rings
Ring
Ring
FW
FD
Wi and Wo
Wi and Wo
Wi
Wi
mm
in.
1.191
0.0469
1.588
0.0625
1.984
0.0781
1.984
0.0781
2.380
0.0937
2.380
0.0937
1.588
0.0625
mm
in.
1.984
0.0781
2.380
0.0937
2.779
0.1094
2.779
0.1094
3.175
0.1250
3.175
0.1250
2.380
0.0937
mm
in.
0.330
0.0130
0.330
0.0130
0.584
0.0230
0.584
0.0230
0.584
0.0230
0.584
0.0230
0.457
0.0180
N/A
N/A
N/A
1.588
0.0625
2.380
0.0937
0.457
0.0180
2.779
0.1094
2.380
0.0937
2.380
0.0937
2.771
0.1091
2.779
0.1094
3.967
0.1562
4.366
0.1719
2.779
0.1094
2.779
0.1094
3.175
0.1250
3.967
0.1562
3.178
0.1251
3.175
0.1250
3.175
0.1250
4.978
0.1960
5.558
0.2188
3.571
0.1406
3.175
0.1250
3.175
0.1250
3.571
0.1406
3.571
0.1406
4.763
0.1875
0.584
0.0230
0.584
0.0230
0.584
0.0230
0.584
0.0230
0.584
0.0230
0.762
0.0300
N/A
N/A
3.571
0.1406
3.571
0.1406
3.967
0.1562
4.610
0.1815
3.967
0.1562
3.967
0.1562
3.967
0.1562
5.771
0.2272
0.584
0.0230
0.584
0.0230
0.584
0.0230
1.067
0.0420
0.584
0.0230
0.584
0.0230
0.584
0.0230
1.067
0.0420
N/A
N/A
mm
in.
mm
in.
mm
in.
N/A
N/A
N/A
2.380
0.0937
2.779
0.1094
2.779
0.1094
3.571
0.1406
3.571
0.1406
3.175
0.1250
3.571
0.1406
3.571
0.1406
4.364
0.1718
4.364
0.1718
0.787
0.0310
0.787
0.0310
0.787
0.0310
0.787
0.0310
0.787
0.0310
N/A
N/A
N/A
2.380
0.0937
2.380
0.0937
3.175
0.1250
3.175
0.1250
0.787
0.0310
0.787
0.0310
3.571
0.1406
2.771
0.1091
2.779
0.1094
3.571
0.1406
3.571
0.1406
3.967
0.1562
4.366
0.1719
3.175
0.1250
3.175
0.1250
3.175
0.1250
4.978
0.1960
3.175
0.1250
4.763
0.1875
4.763
0.1875
4.978
0.1960
7.142
0.2812
4.364
0.1718
3.571
0.1406
3.571
0.1406
4.364
0.1718
4.364
0.1718
4.763
0.1875
0.787
0.0310
0.787
0.0310
0.787
0.0310
0.787
0.0310
0.787
0.0310
0.762
0.0300
N/A
N/A
3.967
0.1562
3.967
0.1562
3.967
0.1562
5.771
0.2272
3.967
0.1562
5.555
0.2187
5.555
0.2187
5.771
0.2272
0.914
0.0360
0.914
0.0360
0.787
0.0310
1.067
0.0420
0.914
0.0360
1.143
0.0450
1.143
0.0450
1.067
0.0420
N/A
N/A
r is the maximum radius of shaft or housing fillet that bearing corner will clear.
Radius(1)
r
mm
in.
0.08
0.0030
0.076
0.0030
0.076
0.0030
0.076
0.0030
0.076
0.0030
0.076
0.0030
0.076
0.0030
0.076
0.0030
0.076
0.0030
0.127
0.0050
0.076
0.0030
0.076
0.0030
0.076
0.0030
0.127
0.0050
0.305
0.0120
0.305
0.0120
0.076
0.0030
0.076
0.0030
0.076
0.0030
0.305
0.0120
0.076
0.0030
0.254
0.0100
0.254
0.0100
0.305
0.0120
0.406
0.0160
Ball
Complement
5
6
5
6
5
8
7
8
8
6
7
8
6
7
7
7
7
7
8
7
11
10
11
8
6
Ball
Size
Load Ratings
Static
Radial
Silicone Dynamic
Nitride
Balls
mm
in.
0.64
0.025
0.79
1/32
1.19
3/64
1.00
0.039
1.59
1/16
1.00
0.039
0.79
1/32
0.64
0.025
0.79
1/32
N
lbf
11
2
16
4
34
8
26
6
57
13
45
10
22
5
17
4
25
6
N
lbf
7
2
11
2
23
5
17
4
39
9
27
6
14
3
10
2
15
3
N
lbf
59
13
100
22
177
40
151
34
287
65
199
45
118
26
85
19
128
29
1.59
1/16
1.00
0.039
1.00
0.039
1.59
1/16
1.59
1/16
1.59
1/16
1.59
1/16
1.19
3/64
1.19
3/64
1.59
1/16
2.38
3/32
1.00
0.039
1.59
1/16
1.59
1/16
2.38
3/32
3.57
9/64
79
18
39
9
45
10
79
18
98
22
98
22
98
22
62
14
62
14
118
26
211
47
71
16
163
37
180
40
269
60
396
89
49
11
24
5
27
6
49
11
61
14
61
14
61
14
39
9
39
9
74
17
135
30
44
10
103
23
113
26
173
39
257
58
365
82
182
41
199
45
365
82
413
93
413
93
413
93
256
58
256
58
458
103
823
185
235
53
530
119
564
127
931
209
1488
334
Continued on next page.
13
Table 1b. Boundary dimensions, miniature and instrument ball bearings,
deep-groove, radial-retainer (inch)
Table 1b continued.
Diameters
Basic
Size
8516
R6
R8
R10
Bore
O.D.
B
D
mm
in.
7.938
0.3125
9.525
0.3750
12.700
0.5000
15.875
0.625
mm
in.
12.700
0.5000
22.225
0.8750
28.575
1.1250
34.925
1.375
Open Bearings
Flange
O.D.
FD
mm
in.
13.894
0.5470
24.613
0.9690
N/A
N/A
Equal Extended Flange
Equal Extended Flange
Width
Inner
Width
Inner
Width
Width
Rings
Ring
Rings
Ring
FW
FD
Wi and Wo
Wi
Wi and Wo
Wi
mm
in.
3.967
0.1562
7.142
0.2812
6.350
0.2500
7.142
0.2812
mm
in.
4.763
0.1875
Load Ratings
Static
Shielded Bearings
N/A
mm
in.
0.787
0.0310
1.575
0.0620
N/A
N/A
N/A
N/A
mm
in.
3.967
0.1562
7.142
0.2812
7.938
0.3125
8.733
0.3438
mm
in.
4.763
0.1875
N/A
mm
in.
0.787
0.0310
1.575
0.0620
N/A
N/A
N/A
N/A
Radius
(1)
r
Ball
Complement
mm
in.
0.127
0.0050
0.406
0.0160
0.406
0.0160
2.489
0.098
11
7
10
10
Ball
Size
Radial
mm
in.
1.59
1/16
3.97
5/32
3.97
5/32
4.76
3/16
N
lbf
183
41
918
206
2111
475
2978
670
Silicone Dynamic
Nitride
Balls
N
lbf
115
26
602
135
1390
313
1970
443
N
lbf
561
126
2578
580
4038
908
5543
1246
Table 1c. Boundary dimensions, miniature and instrument ball bearings,
deep-groove, radial-retainer (metric)
Diameters
Basic
Size
EL1
EL15
EL15R
UL20
EL2
EL2CHH
UL30
EL3
UL40
EL4
34
UL50
EL5
345
35
UL60
EL6
36
UL70
EL7
37
EL8
38
EL9
(1)
Bore
O.D.
B
D
mm
in.
1.000
0.0394
1.500
0.0591
1.500
0.0591
2.000
0.0787
2.000
0.0787
2.000
0.0787
3.000
0.1181
3.000
0.1181
4.000
0.1575
4.000
0.1575
4.000
0.1575
5.000
0.1969
5.000
0.1969
5.000
0.1969
5.000
0.1969
6.000
0.2362
6.000
0.2362
6.000
0.2362
7.000
0.2756
7.000
0.2756
7.000
0.2756
8.000
0.3150
8.000
0.3150
9.000
0.3543
mm
in.
4.000
0.1575
5.000
0.1969
5.000
0.1969
5.000
0.1969
6.000
0.2362
6.000
0.2362
7.000
0.2756
10.000
0.3937
9.000
0.3543
13.000
0.5118
16.000
0.6299
11.000
0.4331
16.000
0.6299
16.000
0.6299
19.000
0.7480
13.000
0.5118
19.000
0.7480
19.000
0.7480
14.000
0.5512
19.000
0.7480
22.000
0.8661
22.000
0.8661
22.000
0.8661
26.000
1.0236
Open Bearings
Shielded Bearings
Flange
O.D.
Equal Width
Rings
Flange
Width
Equal Width
Rings
Flange
Width
FD
Wi and Wo
FW
Wi and Wo
FW
mm
in.
5.00
0.197
6.50
0.256
6.50
0.256
6.10
0.240
7.50
0.295
7.50
0.295
8.10
0.319
11.50
0.453
10.30
0.406
mm
in.
1.600
0.0630
2.000
0.0787
2.000
0.0787
1.500
0.0591
2.300
0.0906
mm
in.
0.50
0.020
0.60
0.024
0.60
0.024
0.50
0.020
0.06
0.002
mm
in.
mm
in.
N/A
N/A
2.600
0.1024
2.000
0.0787
2.300
0.0906
0.80
0.031
0.80
0.031
0.60
0.024
N/A
N/A
N/A
N/A
2.000
0.0787
4.000
0.1575
2.500
0.0984
5.000
0.1969
5.000
0.1969
3.000
0.1181
5.000
0.1969
5.000
0.1969
6.000
0.2362
3.500
0.1378
6.000
0.2362
6.000
0.2362
3.500
0.1378
6.000
0.2362
7.000
0.2756
7.000
0.2756
7.000
0.2756
8.000
0.3150
0.05
0.002
1.00
0.039
0.06
0.002
3.000
0.1181
3.000
0.1181
4.000
0.1575
4.000
0.1575
5.000
0.1969
5.000
0.1969
5.000
0.1969
5.000
0.1969
5.000
0.1969
6.000
0.2362
5.000
0.1969
6.000
0.2362
6.000
0.2362
5.000
0.1969
6.000
0.2362
7.000
0.2756
7.000
0.2756
7.000
0.2756
8.000
0.3150
0.80
0.031
0.80
0.031
1.00
0.039
1.00
0.039
N/A
N/A
12.50
0.492
N/A
N/A
N/A
15.00
0.591
N/A
N/A
16.00
0.630
N/A
N/A
N/A
N/A
N/A
N/A
N/A
0.80
0.031
N/A
N/A
N/A
1.00
0.039
N/A
N/A
1.00
0.039
N/A
N/A
N/A
N/A
N/A
r is the maximum radius of shaft or housing fillet that bearing corner will clear.
N/A
N/A
1.00
0.039
N/A
N/A
N/A
1.10
0.043
N/A
N/A
1.10
0.043
N/A
N/A
N/A
N/A
N/A
Radius(1)
r
mm
in.
0.05
0.002
0.08
0.003
0.08
0.003
0.08
0.003
0.10
0.004
0.10
0.004
0.10
0.004
0.15
0.006
0.10
0.004
0.20
0.008
0.30
0.012
0.15
0.006
0.30
0.012
0.30
0.012
0.30
0.012
0.15
0.006
0.30
0.012
0.30
0.012
0.15
0.006
0.30
0.012
0.30
0.012
0.30
0.012
0.30
0.012
0.30
0.012
Ball
Complement
6
7
8
7
7
8
9
7
7
6
6
8
6
6
6
8
6
6
10
6
7
7
7
7
Ball
Size
mm
in.
0.79
1/32
0.79
1/32
0.79
1/32
0.79
1/32
0.79
1/32
0.64
0.025
1.000
0.039
1.59
1/16
1.59
1/16
2.38
3/32
3.18
1/8
1.59
1/16
3.18
1/8
3.18
1/8
3.57
9/64
1.98
5/64
3.57
9/64
3.57
9/64
1.59
1/16
3.57
9/64
3.97
5/32
3.97
5/32
3.97
5/32
4.76
3/16
Load Ratings
Static
Radial
N
lbf
16
4
22
5
25
6
22
5
22
5
17
4
50
11
98
22
98
22
181
41
297
67
123
28
297
67
297
67
396
89
176
40
396
89
396
89
163
37
396
89
596
134
596
134
596
134
1805
406
Silicone Dynamic
Nitride
Balls
N
lbf
11
2
14
3
15
3
14
3
14
3
10
2
31
7
61
14
61
14
116
26
192
43
77
17
192
43
192
43
257
58
112
25
257
58
257
58
103
23
257
58
389
87
389
87
389
87
1191
268
N
lbf
100
22
118
26
128
29
118
26
118
26
85
19
215
48
413
93
413
93
743
167
1176
264
460
103
1176
264
1176
264
1488
334
654
147
1488
334
1488
334
530
119
1488
334
2031
457
2031
457
2031
457
4273
961
14
C
R3
F
M
7
P28
DB13
1 2 3 4 5 6 7
Fig. 2a. Family 2 part number example.
Family 2
Angular-contact,
non-separable
To build your TSO part number
in this family of bearings, follow
the steps shown here.
Step 1
Specify Material Code
Step 5
Specify Tolerance
The majority of bearings listed under
this family are manufactured from either
440C stainless-steel or 52100 steel.
The applicable ABEC class is noted for
each basic bearing listed in table 2a.
Step 2
Specify Size
Step 6
Specify Radial Internal
Clearance
Boundary dimensions for all bearings
included in this family are shown in
tables 2b.
See table 2b for standard radial plays.
Alternate radial clearance ranges are
available.
Step 3
Specify Flange
Step 7
Specify Any Supplementary
Requirements
Bearings that are flanged have the
flange diameter and width noted in
tables 2b; all others are not flanged.
Common supplemental requirements
are shown in table 2a.
Step 4
Specify Retainer Type
The standard retainer type for each
basic bearing is shown in table 2a.
Other retainer types may be applied.
Table 2a.
Material
C = 52100 chromium-alloy
steel rings and balls
D = 52100 chromium-alloy steel rings
and titanium-carbide coated balls
E = 52100 chromium-alloy steel rings
and silicon-nitride balls
Size
Flange
Retainer Type
Tolerance
See tables
2b & 2c
F = flanged
bearing
M = one-piece, machined,
through hole, phenolic
5 = ABEC 5P
No = noncode flanged
bearing
MP = one-piece, machined,
through hole, porous
polyimide
MR = full ball complement,
no retainer used
S = 440C stainless-steel rings and balls
MX = one-piece, machined,
through hole, Salox M
T = 440C stainless-steel rings and
titanium-carbide coated balls
7 = ABEC 7P
Radial Internal
Clearance
P_ _ = indicates
alternate
radial
clearance(1)
See table 2b for
standard radial
play ranges.
Supplementary
if Required
Lubricant other
than standard
Specific torque
requirement
Bore & O.D. size
Coding
Duplex pair
designation
U = 440C stainless-steel rings
and silicon-nitride balls
(1)
P followed by 2 to 4 digits indicates radial internal clearance range. For example, a radial internal
clearance of P28 indicates a radial internal clearance of 0.0002 to 0.0008 in. Alternate radial internal
clearance ranges are available. For radial internal clearance ranges outside the standard range or
less than half this range, consult your Timken sales engineer.
W
W
FW
W
r
Wi
FW
r
D
B
WO
r
15FW
r
B
Broken CornersBroken Corners
WI
WI
WO
WO
FW
r
D
B
B
FD
FD
WO
D
D
B
WI
r
r
D
WI
D
B
D
FD
B
FD
Broken CornersBroken Corn
Non-Flanged
Equal
Width
Equal Width
FlangedFig.
Equal
Flanged
Equal
Width
Non-Flanged
Wide Inner Wide Inner
Flanged Wide
Flanged
Inner W
Fig.Non-Flanged
2b. Non-flanged
equal
width.
2c.Width
Flanged
equal
width. Non-Flanged
Table 2b. Boundary dimensions, miniature and instrument ball bearings, angular-contact, non-separable
Diameters
Basic
Size
Bore
O.D.
B
D
mm
in.
2.380
Open Bearings
Flange
O.D.
Equal Width Flange
Rings
Width
r
Ball
Radius(1) Complement
Ball
Size
FD
W
FW
mm
in.
mm
in.
mm
in.
mm
in.
mm
in.
mm
in.
7.938
9.12
2.779
0.58
0.13
1.59
5
7
0.0937
0.3125
3.175
6.350
418
0.359
0.1094
0.023
2.776
N/A
0.005
0.1250
0.2500
3.175
7.938
9.12
2.771
0.1250
0.3125
0.359
3.175
9.525
10.72
1/16
0.08
N/A
0.1093
1.00
8
0.003
0.039
0.58
0.08
1.59
0.1091
0.023
0.003
1/16
2.779
0.58
0.13
1.59
518
7
618
7
0.1250
3.175
0.3750
9.525
0.422
11.18
0.1094
3.967
0.023
0.76
0.005
1/16
0.31
R2
1.59
8
0.1250
4.000
0.3750
0.440
16.000
34
0.1562
4.763
0.6299
12.700
0.030
5.000
N/A
0.1575
N/A
3.967
1/16
0.31
0.1969
14.35
0.012
3.18
8
0.012
1.07
1/8
0.31
R3
1.59
8
0.1875
(1)
Radial Play
0.5000
0.565
0.1562
0.042
0.012
r is the maximum radius of shaft or housing fillet that bearing corner will clear.
3/32
From
To
mm
in.
0.005
0.0002
0.013
0.0005
0.023
0.0009
0.005
0.0002
0.013
0.0005
0.005
0.0002
0.013
0.0005
0.023
0.0009
0.005
0.0002
0.013
0.0005
0.023
0.0009
0.005
0.0002
0.013
0.0005
0.023
0.0009
0.033
0.0013
0.043
0.0017
0.011
0.00045
0.022
0.00085
0.032
0.00125
0.005
0.0002
0.013
0.0005
0.023
0.0009
0.033
0.0013
0.043
0.0017
0.053
0.0021
mm
in.
0.013
0.0005
0.023
0.0009
0.033
0.0013
0.013
0.0005
0.020
0.0008
0.013
0.0005
0.023
0.0009
0.033
0.0013
0.013
0.0005
0.023
0.0009
0.033
0.0013
0.013
0.0005
0.023
0.0009
0.033
0.0013
0.043
0.0017
0.053
0.0021
0.022
0.00085
0.032
0.00125
0.042
0.00165
0.013
0.0005
0.023
0.0009
0.033
0.0013
0.043
0.0017
0.053
0.0021
0.064
0.0025
Ref.
Contact Angle
From
To
9
14
14
19
19
22.5
12
19
19
24
9
14
14
19
19
22.5
9.5
15
15
20
20
24
11
17
17
23
23
28
28
32
32
36
13
17.5
17.5
21.5
21.5
24.5
7
11.5
11.5
15.5
15.5
18.5
18.5
21.5
21.5
23.5
23.5
26
Load Ratings
Static
Silicone Dynamic
Radial Nitride
Balls
N
N
N
lbf
lbf
lbf
92
59
395
21
13
89
82
50
392
18
11
88
73
45
388
16
10
87
48
30
201
11
7
45
42
25
196
9
6
44
97
62
405
22
14
91
86
53
401
19
12
90
77
47
396
17
11
89
103
66
415
23
15
93
92
57
410
21
13
92
82
50
403
18
11
91
144
92
507
32
21
114
129
80
498
29
18
112
116
70
487
26
16
109
106
63
474
24
14
107
98
60
462
22
14
104
626
402
1872
141
90
421
585
368
1856
132
83
417
551
340
1838
76
413
124
251
163
903
56
37
203
230
145
897
52
33
202
211
130
889
47
29
200
196
118
882
44
27
198
183
109
874
41
25
196
172
102
866
39
23
195
Continued on next page.
16
Table 4c. Boundary dimensions, angular-contact, non-separable
Table 2b continued.
Diameters
Basic
Size
Bore
O.D.
B
D
mm
in.
mm
in.
5.000
16.000
345
Open Bearings
Flange Equal Width Flange
O.D.
Rings
Width
FD
W
FW
mm
in.
mm
in.
mm
in.
5.000
N/A
Radius
(1)
r
Ball
Complement
Ball
Size
mm
in.
mm
in.
0.31
3.18
N/A
8
0.1969
0.6299
0.1969
0.012
1/8
6.000
19.000
6.000
0.31
3.57
36
N/A
0.2362
0.7480
6.350
12.700
N/A
0.2362
13.89
3.185
0.58
8
0.012
9/64
0.25
1.59
814
10
0.2500
6.350
0.5000
15.875
0.547
17.53
0.1254
4.978
0.023
1.07
0.010
1/16
0.31
R4
1.59
9
0.2500
7.938
0.6250
12.700
0.690
13.89
0.1960
3.967
0.042
0.79
0.012
3/32
0.13
8516
1.59
11
0.3125
0.5000
8.000
22.000
38
0.547
0.1562
0.031
7.000
N/A
0.005
1/16
0.31
3.97
N/A
9
0.3150
0.8661
0.2756
0.012
5/32
9.525
22.225
5.558
0.41
3.97
0.3750
0.8750
R6
(1)
Radial Play
N/A
N/A
0.2188
9
0.016
r is the maximum radius of shaft or housing fillet that bearing corner will clear.
5/32
From
To
mm
in.
0.011
0.0005
0.022
0.0009
0.032
0.0013
0.006
0.0003
0.165
0.0065
0.027
0.0011
0.005
0.0002
0.013
0.0005
0.023
0.0009
0.005
0.0002
0.013
0.0005
0.023
0.0009
0.033
0.0013
0.043
0.0017
0.053
0.0021
0.005
0.0002
0.013
0.0005
0.023
0.0009
0.010
0.0004
0.020
0.0008
0.030
0.0012
0.005
0.0002
0.015
0.0006
0.025
0.0010
mm
in.
0.022
0.0009
0.032
0.0013
0.042
0.0017
0.165
0.0065
0.027
0.0011
0.037
0.0015
0.013
0.0005
0.023
0.0009
0.033
0.0013
0.013
0.0005
0.023
0.0009
0.033
0.0013
0.043
0.0017
0.053
0.0021
0.064
0.0025
0.013
0.0005
0.023
0.0009
0.033
0.0013
0.020
0.0008
0.030
0.0012
0.041
0.0016
0.015
0.0006
0.025
0.0010
0.036
0.0014
Ref.
Contact Angle
From
To
13
17.5
17.5
21.5
21.5
24.5
10.5
17
17
21.5
21.5
25.5
9.5
15
15
20
20
24
7
11.5
11.5
15.5
15.5
18.5
18.5
21.5
21.5
23.5
23.5
26
9.5
15
15
20
20
24
11
16
16
19.5
19.5
22.5
7.5
13
13
16.5
16.5
20
Load Ratings
Static
Silicone Dynamic
Radial Nitride
Balls
N
N
N
lbf
lbf
lbf
626
402
1872
141
90
421
585
368
1856
132
83
417
551
340
1838
124
76
413
782
467
2408
176
105
541
756
449
2353
170
101
529
983
619
2656
221
139
597
171
110
534
39
25
120
154
95
524
35
21
118
139
84
512
31
19
115
314
204
1011
71
46
227
289
183
1001
65
41
225
266
164
990
60
37
223
247
150
979
56
34
220
232
139
968
52
31
218
219
130
956
49
29
215
192
123
566
43
28
127
172
107
555
39
24
125
155
94
542
35
21
122
1357
885
3330
305
199
749
823
3295
1288
290
185
741
1226
771
3259
276
173
733
1197
789
3056
269
177
687
1133
730
3027
255
164
680
1075
680
2997
242
153
674
17
S
R3
F
MB
7
P28
L01
1 2 3 4 5 6 7
Fig. 3a. Family 3 part number.
Family 3
Angular-contact,
separable
To build your TSO part number
in this family of bearings, follow
the steps shown here.
Step 1
Specify Material Code
Step 5
Specify Tolerance
The majority of bearings listed under
this family are manufactured from either
440C stainless-steel or 52100 steel.
The applicable ABEC class is noted for
each basic bearing listed in table 3a.
Step 2
Specify Size
Step 6
Specify Radial Internal
Clearance
Boundary dimensions for all bearings
included in this family are shown in
table 3b.
See table 3b for standard radial plays.
Alternate radial clearance ranges are
available.
Step 3
Specify Flange
Step 7
Specify Any Supplementary
Requirements
Bearings that are flanged have the
flange diameter and width noted in
table 3b; all others are not flanged.
Common supplemental requirements
are shown in table 3a.
Step 4
Specify Retainer Type
The standard retainer type for each
basic bearing is shown in table 3a.
Other retainer types may be applied.
TABLE 3a.
Material
C = 52100 chromium-alloy steel rings
and balls
D = 52100 chromium-alloy steel rings
and titanium-carbide coated balls
E = 52100 chromium-alloy steel rings
and silicon-nitride balls
Size
See
table
3b
Flange
F = flanged
bearing
No = noncode flanged
bearing
S = 440C stainless-steel rings and balls
Retainer Type
Tolerance
MB = one-piece,
machined,
stepped hole,
phenolic
5 = ABEC 5P
7 = ABEC 7P
Radial Internal
Clearance
P_ _ = indicates
alternate
radial
clearance(1)
Supplementary
if Required
Lubricant other than standard
See table 3b for
standard radial
play ranges.
Duplex pair designation
Specific torque requirement
Bore & O.D. size coding
T = 440C stainless-steel rings and
titanium-carbide coated balls
U = 440C stainless-steel rings and
silicon-nitride balls
(1)
P followed by 2 to 4 digits indicates radial internal clearance range. For example, a radial internal
clearance of P28 indicates a radial internal clearance of 0.0002 to 0.0008 in. Alternate radial internal
clearance ranges are available. For radial internal clearance ranges outside the standard range or
less than half this range, consult your Timken sales engineer.
18
W
W
FW
W
r
W
FW
r
r
D
B
B
Broken Corners
WO
WO
r
D
FD
WI
r
D
B
WI
FD
r
B
Broken Corners
WI
WO
FW
FW
r
D
D
B
WI
WO
D
B
D
FD
Broken Corners
B
FD
Broken Corners
Fig.Non-Flanged
3b. Non-flanged
equal
width.
3c.Flanged
FlangedEqual
equal
width.
Equal
Non-Flanged
Width
EqualFlanged
Width Fig.
Equal
Width
Non-Flanged
Width
Wide
Non-Flanged
Inner WideFlanged
Inner Wide Flanged
Inner Wide
Table 3b. Boundary dimensions, angular-contact, separable
Diameters
Basic
Size
Bore
O.D.
B
D
mm
in.
2.380
Open Bearings
Flange
O.D.
Equal Width Flange
Rings
Width
Radius(1)
r
FD
W
FW
mm
in.
mm
in.
mm
in.
mm
in.
mm
in.
7.938
9.12
2.779
0.58
0.13
5
Ball
Complement
Ball
Size
mm
in.
1.59
6
0.0937
0.3125
0.359
0.1094
0.023
0.005
3.175
7.938
9.12
2.771
0.58
0.08
518
1/16
1.59
7
0.1250
0.3125
0.359
0.1091
0.023
0.003
3.175
9.525
10.72
2.779
0.58
0.13
618
1/16
1.59
7
0.1250
0.3750
0.422
0.1094
0.023
0.005
3.175
9.525
11.18
3.967
0.76
0.31
R2
1/16
1.59
7
0.1250
0.3750
4.000
16.000
34
0.440
0.1562
5.000
N/A
0.1575
0.6299
4.763
12.700
0.030
1/16
0.31
3.18
N/A
0.1969
14.35
0.012
3.967
1.07
6
0.012
1/8
0.31
1.59
R3
7
0.1875
0.5000
5.000
16.000
345
0.565
0.1562
0.1969
0.6299
6.000
19.000
0.7480
6.350
12.700
3.18
6
0.012
6.000
1/8
0.31
N/A
0.2362
3.185
3/32
0.31
0.1969
13.89
0.012
N/A
N/A
0.2362
0.042
5.000
N/A
36
3.57
6
0.012
0.58
9/64
0.25
814
1.59
10
0.2500
0.5000
0.547
0.1254
0.023
0.010
1/16
6.350
15.875
17.53
4.978
1.07
0.31
1.59
R4
8
0.2500
0.6250
8.000
22.000
38
0.690
0.1960
0.8661
0.042
7.000
N/A
0.3150
(1)
Radial Play
0.012
0.31
N/A
0.2756
3/32
3.97
7
0.012
r is the maximum radius of shaft or housing fillet that bearing corner will clear.
5/32
From
To
mm
in.
0.010
0.0004
0.025
0.0010
0.010
0.0004
0.025
0.0010
0.010
0.0004
0.025
0.0010
0.010
0.0004
0.025
0.0010
0.011
0.00045
0.022
0.00085
0.032
0.00125
0.010
0.0004
0.030
0.0012
0.051
0.0020
0.015
0.0006
0.036
0.0014
0.013
0.0005
0.033
0.0013
0.010
0.0004
0.025
0.0010
0.010
0.0004
0.030
0.0012
0.051
0.0020
0.020
0.0008
0.041
0.0016
mm
in.
0.025
0.0010
0.046
0.0018
0.025
0.0010
0.046
0.0018
0.025
0.0010
0.046
0.0018
0.025
0.0010
0.046
0.0018
0.022
0.00085
0.032
0.00125
0.042
0.00165
0.030
0.0012
0.051
0.0020
0.064
0.0025
0.036
0.0014
0.056
0.0022
0.033
0.0013
0.053
0.0021
0.025
0.0010
0.046
0.0018
0.030
0.0012
0.051
0.0020
0.064
0.0025
0.041
0.0016
0.061
0.0024
Ref.
Contact Angle
From
To
12.5
19.5
19.5
26.5
12.5
19.5
19.5
26.5
13
21
21
28
12.5
19.5
19.5
26.5
13
17.5
17.5
21.5
21.5
24.5
10
18
18
23
23
26
11
16.5
16.5
21
8
12.5
12.5
16
13
21
21
28
10
18
18
23
23
26
11
15.5
15.5
19
Load Ratings
Static
Silicone Dynamic
Radial Nitride
Balls
N
N
N
lbf
lbf
lbf
70
45
353
16
10
79
66
45
347
15
10
78
86
53
401
19
12
90
72
47
389
16
11
87
92
57
410
21
13
92
77
50
396
17
11
89
78
48
379
18
11
85
65
43
368
15
10
83
193
123
952
43
28
214
178
111
947
40
25
213
165
111
941
37
25
212
197
123
818
44
28
184
168
102
799
38
23
180
152
102
783
34
23
176
269
168
1169
61
38
263
240
163
1149
54
37
258
264
166
1245
59
37
280
232
156
1232
52
35
277
154
95
524
35
21
118
130
77
506
29
17
114
251
158
923
57
35
207
216
130
901
49
29
203
195
116
883
44
26
199
537
337
2015
121
76
453
484
295
1988
109
66
447
19
S
R4
F
HH
7
P28
L01
1 2 3 4 5 6 7
Fig. 4a. Family 4 part number.
Family 4
Deep-groove,
full-complement
To build your TSO part number
in this family of bearings, follow
the steps shown here.
Step 1
Specify Material Code
Step 5
Specify Tolerance
The majority of bearings listed under
this family are manufactured from either
440C stainless-steel or 52100 steel.
The applicable ABEC class is noted for
each basic bearing listed in table 4a.
Step 2
Specify Size
Boundary dimensions for all bearings
included in this family are shown in
table 4b.
Step 3
Specify Flange
Bearings that are flanged have the
flange diameter and width noted in
table 4b; all others are not flanged.
Step 4
Specify Feature (shields)
Step 6
Specify Radial Internal
Clearance
Standard radial clearance of 0.0051 mm
to 0.0203 mm (0.0002 in. to 0.0008 in.)
applies to this family. Alternate radial
clearance ranges are available.
Step 7
Specify Any Supplementary
Requirements
Common supplemental requirements
are shown in table 4a.
The standard feature codes for each
basic bearing are shown in table 4a.
TABLE 4a.
Material
Size
S
100
S
2
S
3332
S
518
S
5632
S
R2
S
R3
S
R4
Flange
F = flanged
bearing
No code = nonflanged
bearing
Feature
Tolerance
Radial Internal Clearance
HH = double
shield
5 = ABEC 5P
P28 = standard radial internal
clearance of 0.0002 to
0.0008 in. (0.00508 to
0.02032 mm)
No code = open
bearing
(no shields
or seals)
7 = ABEC 7P
P_ _ = indicates alternate
radial clearance(1)
Supplementary
if Required
Lubricant other than
standard
Specific torque
requirement
Bore & O.D. size
coding
Duplex pair
designation
S = 440C stainless-steel rings
and balls
C = 52100 chromium-alloy
steel rings and balls
U = 440C stainless-steel rings
and silicon-nitride balls
(1)
P followed by 2 to 4 digits indicates radial internal clearance range. For example our standard radial
internal clearance of P28 indicates a radial internal clearance of 0.0002 to 0.0008 in. Alternate radial
internal clearance ranges are available. For radial internal clearance ranges outside the standard range
or less than half this range, consult your Timken sales engineer.
20
W
W
W
WI
WI
WO
WO
FW FW
W
r
r
B
r
r
D
D
FD
B
FD
FW
r
r
D
D
B
WI
WI
WO W
O
B
B
FD FD
Broken
Corners
Broken
Corners
Non-Flanged
Equal
Width
Non-Flanged
Equal
Width
Fig. 4b. Non-flanged
equal width.
D
D
B
B
r
r
D
D
B
Broken
Corners
Broken
Corners
Flanged Equal
Width
Flanged
Width
Fig. 4c.Equal
Flanged
equal width.
Non-Flanged
Non-Flanged
Inner
Fig. 4d.Wide
Non-flanged
Extended
extendedInner
inner.
Flanged
Flanged
Inner
Fig.Wide
4e. Flanged
Extended
extendedInner
inner.
Table 4b. Boundary dimensions, deep-groove, full-complement
Diameters
Basic
Size
(1)
Open Bearings
Flange
O.D.
Shielded Bearings
Equal Extended Flange
Equal Extended Flange
Width
Inner
Width
Inner
Width
Width
Rings
Ring
Rings
Ring
FW
FW
Wi and Wo
Wi
Wi and Wo
Wi
Radius(1)
Bore
O.D.
B
D
mm
in.
mm
in.
mm
in.
mm
in.
mm
in.
mm
in.
mm
in.
mm
in.
mm
in.
mm
in.
100
0.635
0.0250
2.560
0.1008
N/A
0.792
0.0312
N/A
N/A
N/A
N/A
N/A
0.08
0.003
2
1.016
0.0400
3.175
0.1250
4.34
0.171
1.191
0.0469
N/A
0.33
0.013
N/A
N/A
N/A
3332
2.380
0.0937
4.763
0.1875
5.94
0.234
1.588
0.0625
2.380
0.0937
0.46
0.018
2.380
0.0937
3.175
0.1250
518
3.175
0.1250
7.938
0.3125
9.12
0.359
2.779
0.1094
3.571
0.1406
0.58
0.023
3.571
0.1406
5632
4.763
0.1875
7.938
0.3125
9.12
0.359
2.779
0.1094
3.571
0.1406
0.58
0.023
R2
3.175
0.1250
9.525
0.3750
11.18
0.440
3.967
0.1562
N/A
R3
4.763
0.1875
12.700
0.5000
14.35
0.565
3.967
0.1562
R4
6.350
0.2500
15.875
0.6250
17.53
0.690
4.978
0.1960
FD
r
Ball
Complement
Ball
Size
Load Ratings
Static
Radial
Silicone Dynamic
Nitride
Balls
mm
in.
N
lbf
N
lbf
N
lbf
7
0.64
0.025
8
2
6
1
65
15
0.08
0.003
10
0.64
0.025
16
4
10
2
94
21
0.79
0.031
0.08
0.003
14
0.79
1/32
45
10
27
6
187
42
4.364
0.1718
0.79
0.031
0.08
0.003
11
1.59
1/16
145
33
91
20
546
123
3.175
0.1250
3.967
0.1562
0.91
0.036
0.08
0.003
16
1.19
3/64
143
32
89
20
445
100
0.76
0.030
3.967
0.1562
N/A
0.76
0.030
0.30
0.012
12
1.59
1/16
168
38
105
24
592
133
4.763
0.1875
1.07
0.042
4.978
0.1960
5.771
0.2272
1.07
0.042
0.30
0.012
11
2.38
3/32
332
75
212
48
1112
250
N/A
1.07
0.042
4.978
0.1960
N/A
1.07
0.042
0.30
0.012
14
2.38
3/32
471
106
302
68
1351
304
r is the maximum radius of shaft or housing fillet that bearing corner will clear.
21
C
R2
F
R
7
P28
L01
1 2 3 4 5 6 7
Fig. 5a. Family 5 part number.
Family 5
Deep-groove,
radial-retainer,
narrow series
To build your TSO part number
in this family of bearings, follow
Step 1
Specify Material Code
Step 5
Specify Tolerance
The majority of bearings listed under
this family are manufactured from either
440C stainless-steel or 52100 steel.
The applicable ABEC class is noted for
each basic bearing listed in table 5a.
Step 2
Specify Size
the steps shown here.
Boundary dimensions for all bearings
included in this family are shown in
table 5b.
Step 3
Specify Flange
Step 6
Specify Radial Internal
Clearance
Standard radial clearance of 0.0051 mm
to 0.0203 mm (0.0002 in. to 0.0008 in.)
applies to this family. Alternate radial
clearance ranges are available.
Step 7
Specify Any Supplementary
Requirements
Bearings that are flanged have the
flange diameter and width noted in
table 5b; all others are not flanged.
Common supplemental requirements
are shown in table 5a.
Step 4
Specify Feature (shields)
The standard feature codes for each
basic bearing are shown in table 5a.
TABLE 5a.
Material
C = 52100 chromium-alloy
steel rings and balls
D = 52100 chromium-alloy
steel rings and titaniumcarbide coated balls
E = 52100 chromium-alloy
steel rings and siliconnitride balls
Size
Flange
Retainer Type
Feature
Tolerance
Radial Internal Clearance
See
table
5b
F= flanged
bearing
C = one-piece, pressed,
snap-type crown,
stainless-steel
HN = single
shield
narrow
5 = ABEC 5P
P28 = standard radial
internal clearance
of 0.0002 to 0.0008
in. (0.00508 to
0.02032 mm)
No code =
nonflanged
bearing
R = two-piece, pressed,
ribbon-type,
stainless-steel
S = 440C stainless-steel
rings and balls
7 = ABEC 7P
P_ _ =indicates alternate
radial clearance(1)
Supplementary
if Required
Lubricant other
than standard
Specific torque
requirement
Bore & O.D. size
coding
Duplex pair
designation
T = 440C stainless-steel
rings and titaniumcarbide coated balls
U = 440C stainless-steel rings
and silicon-nitride balls
(1)
P followed by 2 to 4 digits indicates radial internal clearance range. For example our standard radial
internal clearance of P28 indicates a radial internal clearance of 0.0002 to 0.0008 in. Alternate radial
internal clearance ranges are available. For radial internal clearance ranges outside the standard range
or less than half this range, consult your Timken sales engineer.
22
WI
W
WO
FW
W
r
r
r
D
Broken Corners
Diameters
Bore
O.D.
B
D
mm
in.
mm
in.
mm
in.
mm
in.
3
1.397
0.0550
4.763
0.1875
2.380
0.0937
0.076
0.0030
4
1.984
0.0781
6.350
0.2500
2.779
0.1094
5
2.380
0.0937
7.938
0.3125
418
3.175
0.1250
518
W
Chamfer
Ball
Size
Non-Flanged Wide Inner
Load Ratings
Static
Radial
FD
Broken
Non-Flanged Equal Width
Flanged Equal Width
Table 5b. Boundary dimensions, deep-groove, radial-retainer, narrow series
Ball
Complement
B
B
FD
Fig. 5b. Non-flanged equal width.
Width
D
D
B
Basic
Size
FW
Dynamic
Silicone
Nitride Balls
mm
in.
N
lbf
N
lbf
N
lbf
5
1.19
3/64
34
8
23
5
177
40
0.076
0.0030
5
1.59
1/16
57
13
39
9
287
65
2.779
0.1094
0.127
0.0050
6
1.59
1/16
79
18
49
11
365
82
6.350
0.2500
2.380
0.0937
0.076
0.0030
7
1.00
0.039
39
9
24
5
182
41
3.175
0.1250
7.938
0.3125
2.779
0.1094
0.076
0.0030
6
1.59
1/16
79
18
49
11
365
82
618
3.175
0.1250
9.525
0.3750
2.779
0.1094
0.127
0.0050
7
1.59
1/16
98
22
61
14
413
93
5532
3.967
0.1562
7.938
0.3125
2.779
0.1094
0.076
0.0030
7
1.19
3/64
62
14
39
9
256
58
5632
4.763
0.1875
7.938
0.3125
2.779
0.1094
0.076
0.0030
7
1.19
3/64
62
14
39
9
256
58
814c
6.350
0.2500
12.700
0.5000
3.175
0.1250
0.254
0.0100
10
1.59
1/16
163
37
103
23
530
119
814r
6.350
0.2500
12.700
0.5000
3.175
0.1250
0.254
0.0100
11
1.59
1/16
180
40
113
26
564
127
Flange
23
A
280
1
2
Fig. 6a. Family 6 part number.
Family 6
Deep-groove,
radial-retainer,
modified
dimension
Family 6 bearings are unique because they are modified-dimension product. Those
modified-dimension bearings that cannot be described using the Timken catalog
part numbering system are described using the alpha-numeric special design part
numbering system. This is a combination of the basic bearing number from table 6a and
a sequential dash number assigned for each specific application. Basic bearing chassis
can be determined by using tables 6a, 6b, 6c and 6d. The remaining nomenclature
should be completed with the assistance of a Timken engineer.
To build your TSO part number
in this family of bearings, follow
W
the steps shown here.
FW
W
Step 1
Specify Basic Bearing
r
r
D
Basic Family 6 bearings are
listed in tables 6a, 6b, 6c, 6d.
D
B
B
FD
Step 2
Contact Timken
Broken Corners
Remaining information for
your specific part should be
discussed with your Timken
sales engineer.
Non-Flanged
Width
Fig. 6b. Equal
Non-flanged
equal width.
Flanged
Equal
Width
Fig. 6c.
Flanged
equal width.
Table 6a. Boundary dimensions, modified dimensions
Basic
Size
A834
A281
A521
B70
A430
A431
D983
B698
E685
G229
Diameters
Bore
O.D.
B
mm
in.
D
mm
in.
3.175
0.1250
3.175
0.1250
3.175
0.1250
3.175
0.1250
3.175
0.1250
3.175
0.1250
6.350
0.2500
6.350
0.2500
7.938
0.3125
9.525
0.3750
9.525
0.3750
9.525
0.3750
10.414
0.4100
10.414
0.4100
12.700
0.5000
12.700
0.5000
12.700
0.5000
19.050
0.7500
12.700
0.5000
15.875
0.6250
Flange
Dia.
Flange
Width
FD
FW
mm
in.
mm
in.
mm
in.
mm
in.
2.380
0.0937
2.779
0.1094
2.380
0.0937
2.380
0.0937
2.779
0.1094
2.779
0.1094
3.175
0.1250
4.978
0.1960
2.779
0.1094
4.978
0.1960
N/A
N/A
N/A
N/A
N/A
N/A
N/A
N/A
N/A
N/A
N/A
N/A
13.894
0.5470
0.584
0.0230
N/A
N/A
13.894
0.5470
0.584
0.0230
0.08
0.003
0.08
0.003
0.13
0.005
0.08
0.003
0.13
0.005
0.08
0.003
0.25
0.010
0.30
0.012
0.25
0.010
0.25
0.010
Inner
Width
Outer
Width
mm
in.
2.380
0.0937
2.779
0.1094
2.380
0.0937
2.380
0.0937
2.779
0.1094
2.779
0.1094
6.731
0.2650
4.978
0.1960
2.779
0.1094
4.978
0.1960
N/A
N/A
Chamfer
Standard
Retainer
Type
R
C
C
R
C
C
Load Ratings
Closures
Double
Shield
Double
Shield
Single
Shield
Double
Shield
Single
Shield
Double
Shield
ABEC
7P
7P
7P
5P
5P
5P
C
Open
7P
R
Double
Shield
7P
R
Open
5P
ST
Double
Shield
7P
Static
Dynamic
N
lbf
N
lbf
48
11
42
9
76
17
48
11
36
8
39
9
156
35
282
63
189
42
293
66
201
45
184
41
246
55
201
45
167
38
182
41
525
118
935
210
564
127
686
154
Non-Fl
24
Table 6b. Boundary dimensions, modified dimensions for FAA approved TSO items
based on established approved designs
Basic
Size
A280
B44
F718
L120
Diameters
Bore
O.D.
B
mm
in.
D
mm
in.
2.380
0.0937
4.763
0.1875
4.763
0.1875
9.525
0.3750
6.985
0.2750
12.700
0.5000
12.700
0.5000
22.225
0.8750
Inner
Width
Outer
Width
Chamfer
mm
in.
mm
in.
mm
in.
1.588
0.0625
2.779
0.1094
3.967
0.1562
7.142
0.2812
1.588
0.0625
2.779
0.1094
3.967
0.1562
7.142
0.2812
0.127
0.005
0.08
0.003
0.18
0.007
0.41
0.016
Standard
Retainer
Type
Load Ratings
Closures
ABEC
Single
Shield
Single
Shield
Double
Shield
Double
Shield
C
C
R
ST
5P
7P
7P
7P
Reference
Family
Dynamic
Static
Hybrid
Static
N
lbf
N
lbf
N
lbf
18
4
59
13
126
28
771
173
11
3
36
8
81
18
501
113
87
19
253
57
462
104
2318
521
Reference
Chassis
Size
1
3332
1
5632
1
6316
1
R6
Table 6c. Boundary dimensions, modified dimensions for FAA approved TSO items
based on established approved family (2) designs
Basic
Size
Diameters
Bore
O.D.
B
mm
in.
D
mm
in.
4.763
12.700
Standard
Chamfer Retainer Closures
Type
Inner
Width
Outer
Width
mm
in.
mm
in.
mm
in.
3.976
3.967
0.30
F557
0.1875
0.5
0.1562
0.1562
0.012
4.763
12.700
3.967
3.967
0.30
L469
0.1875
0.5
0.1562
0.1562
Radial Play
ABEC
M
Open
7P
MP
Open
7P
0.012
Load Ratings
From
To
Static
Hybrid
Static
mm
in.
0.005
0.0002
0.013
0.0005
0.023
0.0009
0.033
0.0013
0.043
0.0017
0.053
0.0021
0.005
0.0002
0.013
0.0005
0.023
0.0009
0.033
0.0013
0.043
0.0017
0.053
0.0021
mm
in.
0.013
0.0005
0.023
0.0009
0.033
0.0013
0.043
0.0017
0.063
0.0021
0.064
0.0025
0.013
0.0005
0.023
0.0009
0.033
0.0013
0.043
0.0017
0.053
0.0021
0.064
0.0025
N
lbf
251
56
230
52
211
47
196
44
183
41
172
39
251
56
230
52
211
47
196
44
183
41
172
39
N
lbf
163
37
145
33
130
29
118
27
109
25
102
23
163
37
145
33
130
29
118
27
109
25
102
23
Reference
Refence
Chassis
Family
Dynamic
Size
N
lbf
903
203
897
202
889
200
882
198
874
196
866
195
903
203
897
202
889
200
882
198
874
196
866
195
2
R3
2
R3
Table 6d. Boundary dimensions, modified dimensions for FAA approved TSO items
based on established approved family (3) designs
Basic
Size
Config.
Suffix
Diameters
Bore
O.D.
B
mm
in.
D
mm
in.
2.380
0.0937
7.938
0.3125
Inner
Width
Standard
Outer
Chamfer Retainer Closures ABEC
Width
Type
mm
in.
mm
in.
mm
in.
2.779
0.1094
2.779
0.1094
0.127
0.005
Load Ratings
Radial Play
Static
Hybrid
Dynamic
Static
N
lbf
N
lbf
N
lbf
70
16
45
10
354
80
Reference
Reference
Chassis
Family
Size
000
F816
800
803
811
MB
Open
7P
0.0003
0.0011
3
5
25
C
2128
MC
H
5
P511
L01
1 2 3 4 5 6 7
Fig. 7a. Family 7 part number.
Family 7
Thin-section/
torque-tube,
Conrad series
To build your TSO part number
in this family of bearings, follow
the steps shown here.
Step 1
Specify Material Code
Step 5
Specify Tolerance
The majority of bearings listed under
this family are manufactured from either
440C stainless-steel or 52100 steel.
The applicable ABEC class is noted for
each basic bearing listed in table 7a.
Step 2
Specify Size
Step 6
Specify Radial Internal
Clearance
Boundary dimensions for all bearings
included in this family are shown in
table 7b and table 7c.
See table 7a for standard radial internal
clearances for this family. Alternate
radial clearance ranges are available.
Step 3
Specify Retainer Type
Step 7
Specify Any Supplementary
Requirements
The standard retainer type for each
basic bearing is shown in table 7a.
Other retainer types may be applied.
Common supplemental requirements
are shown in table 7a.
Step 4
Specify Feature (shields)
The standard feature codes for each
basic bearing are shown in table 7a.
Table 7a.
Material
C = 52100 chromium-alloy
steel rings and balls
D = 52100 chromium-alloy
steel rings and titaniumcarbide coated balls
E = 52100 chromium-alloy
steel rings and siliconnitride balls
S = 440C stainless-steel
rings and balls
Size
Retainer Type
See
tables
7b &7c
MC = one-piece,
machined,
snap-type crown,
phenolic
MCK = one-piece, molded,
snap-type crown,
glass reinforced
nylon
ST = tube type, Teflon
T = 440C stainless-steel
rings and titaniumcarbide coated balls
U = 440C stainless-steel
rings and silicon-nitride
balls
(1)
Feature
H = single shield
HH = double shield
Z = single seal
ZZ = double seal
E = wide inner
ring
No = open bearing
code (no shields or
seals)
Radial Internal
Clearance
For Conrad bearings, standard
3 = class 3
radial internal clearances are:
5 = ABEC 5P, Ball Standard
5T or 5F
Size Radial Play (in.)
(ABEC 5P
1/16”, 3/32” 0.0003-0.0008 P38
for 610
1/8”
0.0005-0.0011 P511
and 812
5/32” 0.0006-0.0012 P612
sizes)
3/16” 0.0007-0.0015 P715
7 = ABEC 7P,
1/8” and 0.0005-0.0015 P515
7T or 7F
larger
(ABEC 7P
Contact angle 30˚ Nominal
for 610
and 812
P_ _ = indicates alternate
sizes)
radial clearance(1)
Tolerance
Supplementary
if Required
Lubricant other
than standard
Specific torque
requirement
Bore & O.D. size
coding
Duplex pair
designation
P followed by 2 to 4 digits indicates radial internal clearance range. For example our standard radial
internal clearance of P28 indicates a radial internal clearance of 0.0002 to 0.0008 in. Alternate radial
internal clearance ranges are available. For radial internal clearance ranges outside the standard
range or less than half this range, consult your Timken sales engineer.
26
W
W
W FW
W
r
r
r
WO
WO
B
B
Fig. 7b. Non-flanged
equal width.
Broken Corners
FD
r
r
r
D
D
B
B
WO
FW
D
D
WI
WI
WO
r
r
D
D
FD
WI
FW
D
B
WI
FD
Fig. 7c. Non-flanged extended inner.
Broken Corners
B
B
Broken Corners
D
FD
B
Broken Corners
Non-Flanged Equal Width
Equal WidthFlanged Equal
Non-Flanged
Flanged
Non-FlangedFlanged
Equal Width
Width
Non-Flanged Wide
Inner
Flanged Wide Inner
Extended
Inner instrument Extended
Inner
Table 7b. Boundary dimensions, torque-tube series, Conrad
assembly
ball bearings
Diameters
Basic
Size
610
812
1014
1216
1418
1622
1721
2024
2226
2428
2430
2630
3240
3242
4048
4050
4856
4858
5664
5666
6472
64-74
64-76
64-80
68-76
68-78
Ball Complement
Bore
O.D.
B
D
mm
in.
9.525
0.3750
12.700
0.5000
15.875
0.6250
19.050
0.7500
22.225
0.8750
25.400
1.0000
26.988
1.0625
31.750
1.2500
34.925
1.3750
38.100
1.5000
38.100
1.5000
41.275
1.6250
50.800
2.0000
50.800
2.0000
63.500
2.5000
63.500
2.5000
76.200
3.0000
76.200
3.0000
88.900
3.5000
88.900
3.5000
101.600
4.0000
101.600
4.0000
101.600
4.0000
101.600
4.0000
107.950
4.2500
107.950
4.2500
mm
in.
15.875
0.6250
19.050
0.7500
22.225
0.8750
25.400
1.0000
28.575
1.1250
34.925
1.3750
33.338
1.3125
38.100
1.5000
41.275
1.6250
44.450
1.7500
47.625
1.8750
47.625
1.8750
63.500
2.5000
66.675
2.6250
76.200
3.0000
79.375
3.1250
88.900
3.5000
92.075
3.6250
101.600
4.0000
104.775
4.1250
114.300
4.5000
117.475
4.6250
120.650
4.7500
127.000
5.0000
120.650
4.7500
123.825
4.8750
Width
W
mm
in.
3.962
0.1560
3.962
0.1560
3.962
0.1560
3.962
0.1560
3.962
0.1560
4.763
0.1875
3.962
0.1560
3.962
0.1560
3.962
0.1560
3.962
0.1560
4.763
0.1875
3.962
0.1560
6.350
0.2500
7.938
0.3125
6.350
0.2500
7.938
0.3125
6.350
0.2500
7.938
0.3125
6.350
0.2500
7.938
0.3125
6.350
0.2500
7.938
0.3125
9.525
0.3750
12.700
0.5000
6.350
0.2500
7.938
0.3125
Chamfer
mm
in.
0.25
0.010
0.25
0.010
0.25
0.010
0.25
0.010
0.25
0.010
0.38
0.015
0.25
0.010
0.25
0.010
0.25
0.010
0.25
0.010
0.38
0.015
0.25
0.010
0.64
0.025
1.02
0.040
0.64
0.025
1.02
0.040
0.64
0.025
1.02
0.040
0.64
0.025
1.02
0.040
0.64
0.025
1.02
0.040
1.02
0.040
1.52
0.060
0.64
0.025
1.02
0.040
Ball
Quantity
14
17
20
24
26
21
32
36
40
44
29
48
30
25
36
30
43
35
49
40
55
45
38
30
58
48
Load Ratings
Radial Static
Ball
Diameter
Steel
Ceramic
Hybrid
Dynamic
mm
in.
1.59
1/16
1.59
1/16
1.59
1/16
1.59
1/16
1.59
1/16
2.38
3/32
1.59
1/16
1.59
1/16
1.59
1/16
1.59
1/16
2.38
3/32
1.59
1/16
3.18
1/8
3.97
5/32
3.18
1/8
3.97
5/32
3.18
1/8
3.97
5/32
3.18
1/8
3.97
5/32
3.18
1/8
3.97
5/32
4.76
3/16
6.35
1/4
3.18
1/8
3.97
5/32
N
lbf
338
76
427
96
516
116
605
136
693
156
1648
370
865
195
984
221
1100
247
1215
273
2358
530
1331
299
4393
988
5555
1249
5352
1203
6787
1526
6459
1452
8017
1802
6745
1516
8267
1859
7616
1712
9369
2106
11072
2489
15956
3587
8052
1810
10024
2254
N
lbf
214
48
271
61
327
74
384
86
440
99
1067
240
549
124
625
141
699
157
772
174
1528
344
846
190
2839
638
3601
810
3459
778
4402
990
4176
939
5202
1169
4220
949
5160
1160
4766
1072
5849
1315
6901
1551
9973
2242
5039
1133
6259
1407
N
lbf
757
170
823
185
879
198
928
209
974
219
2154
484
1067
240
1107
249
1158
260
1206
271
2435
547
1251
281
4201
944
5838
1313
4484
1008
6253
1406
4811
1082
6620
1488
4673
1051
6397
1438
4865
1094
6675
1501
8623
1939
13596
3056
4955
1114
6855
1541
Continued on next page.
27
Table 7b continued.
Table 7b. Boundary dimensions, torque-tube series, Conrad assembly instrument ball bearings
Diameters
Basic
Size
68-80
68-84
72-80
72-82
72-84
72-88
76-84
76-86
76-88
76-92
80-88
80-90
80-92
80-96
88-96
Ball Complement
Bore
O.D.
B
D
mm
in.
107.950
4.2500
107.950
4.2500
114.300
4.5000
114.300
4.5000
114.300
4.5000
114.300
4.5000
120.650
4.7500
120.650
4.7500
120.650
4.7500
120.650
4.7500
127.000
5.0000
127.000
5.0000
127.000
5.0000
127.000
5.0000
139.700
5.5000
mm
in.
127.000
5.0000
133.350
5.2500
127.000
5.0000
130.175
5.1250
133.350
5.2500
139.700
5.5000
133.350
5.2500
136.525
5.3750
139.700
5.5000
146.050
5.7500
139.700
5.5000
142.875
5.6250
146.050
5.7500
152.400
6.0000
152.400
6.0000
Width
Chamfer
W
mm
in.
9.525
0.3750
12.700
0.5000
6.350
0.2500
7.938
0.3125
9.525
0.3750
12.700
0.5000
6.350
0.2500
7.938
0.3125
9.525
0.3750
12.700
0.5000
6.350
0.2500
7.938
0.3125
9.525
0.3750
12.700
0.5000
6.350
0.2500
Ball
Quantity
mm
in.
1.02
0.040
1.52
0.060
0.64
0.025
1.02
0.040
1.02
0.040
1.52
0.060
0.64
0.025
1.02
0.040
1.02
0.040
1.52
0.060
0.64
0.025
1.02
0.040
1.02
0.040
1.52
0.060
0.64
0.025
40
31
62
50
43
33
65
53
45
35
68
55
47
36
74
Load Ratings
Radial Static
Ball
Diameter
Steel
Ceramic
Hybrid
Dynamic
mm
in.
4.76
3/16
6.35
1/4
3.18
1/8
3.97
5/32
4.76
3/16
6.35
1/4
3.18
1/8
3.97
5/32
4.76
3/16
6.35
1/4
3.18
1/8
3.97
5/32
4.76
3/16
6.35
1/4
3.18
1/8
N
lbf
11697
2630
16564
3724
8626
1939
10471
2354
12615
2836
17706
3980
9062
2037
11126
2501
13240
2976
18849
4237
9497
2135
11572
2601
13865
3117
19453
4373
10367
2331
N
lbf
7291
1639
10354
2328
5399
1214
6538
1470
7864
1768
11070
2489
5672
1275
6948
1562
8255
1856
11786
2650
5945
1337
7227
1625
8645
1943
12165
2735
6491
1459
N
lbf
8780
1974
13686
3077
5098
1146
6934
1559
9074
2040
14063
3161
5182
1165
7102
1597
9218
2072
14423
3243
5263
1183
7176
1613
9357
2104
14502
3260
5419
1218
Table 7c. Boundary dimensions, torque-tube series, Conrad assembly instrument ball bearings
Diameters
Basic
Size
Extended
Inner Ring
Wi
Radius(1)
Bore
O.D.
B
D
mm
in.
15.875
0.6250
19.050
0.7500
22.225
0.8750
26.988
1.0625
33.338
1.3125
39.688
1.5625
46.038
1.8125
52.388
2.0625
58.738
2.3125
65.088
2.5625
mm
in.
26.988
1.0625
30.163
1.1875
33.338
1.3125
38.100
1.5000
44.450
1.7500
50.800
2.0000
57.150
2.2500
66.675
2.6250
73.025
2.8750
82.550
3.2500
mm
in.
6.350
0.2500
6.350
0.2500
6.350
0.2500
6.350
0.2500
6.350
0.2500
6.350
0.2500
6.350
0.2500
6.350
0.2500
6.350
0.2500
7.938
0.3125
mm
in.
7.137
0.2810
7.137
0.2810
7.137
0.2810
7.137
0.2810
7.137
0.2810
7.137
0.2810
7.137
0.2810
7.137
0.2810
7.137
0.2810
9.525
0.3750
mm
in.
0.38
0.015
0.38
0.015
0.38
0.015
0.38
0.015
0.38
0.015
0.38
0.015
0.38
0.015
0.38
0.015
0.38
0.015
0.38
0.015
4556
71.438
2.8125
88.900
3.500
7.938
0.3125
9.525
0.3750
0.38
0.015
4962
77.788
3.0625
98.425
3.8750
7.938
0.3125
9.525
0.3750
0.38
0.015
1017
1219
1421
1724
2128
2532
2936
3342
3746
4152
(1)
Ball Complement
Width
Equal Width
Rings
Wi and Wo
r
r is the maximum radius of shaft or housing fillet that bearing corner will clear.
Ball
Quantity
Load Ratings
Radial Static
Ball
Diameter
Steel
Ceramic
Hybrid
Dynamic
mm
in.
3.18
1/8
3.18
1/8
3.18
1/8
3.18
1/8
3.18
1/8
3.18
1/8
3.18
1/8
3.18
1/8
3.18
1/8
4.76
3/16
N
lbf
1520
342
1566
352
1871
421
2472
556
2815
633
3437
773
4062
913
4701
1057
5033
1131
8231
1850
N
lbf
978
220
1009
227
1206
271
1595
359
1817
408
2220
499
2624
590
3037
683
3253
731
5333
1199
N
lbf
2836
638
2782
625
3016
678
3447
775
3548
798
3856
867
4131
929
4340
976
4391
987
8161
1835
28
4.76
3/16
8933
2008
5789
1301
8384
1885
32
4.76
3/16
10299
2315
6675
1501
8907
2002
12
12
14
18
20
24
28
32
34
26
28
S
1017
M
H
7
P38
L01
1 2 3 4 5 6 7
Fig. 8a. Family 8 part number.
Family 8
Thin-section/
torque-tube,
angular-contact
series
To build your TSO part number
in this family of bearings, follow
the steps shown here.
Step 1
Specify Material Code
Step 5
Specify Tolerance
The majority of bearings listed under
this family are manufactured from either
440C stainless-steel or 52100 steel.
The applicable ABEC class is noted for
each basic bearing listed in table 8a.
Step 2
Specify Size
Step 6
Specify Radial Internal
Clearance
Boundary dimensions for all bearings
included in this family are shown in
table 8b and table 8c.
See table 8a for standard radial internal
clearances for this family. Alternate
radial clearance ranges are available.
Step 3
Specify Retainer Type
Step 7
Specify Any Supplementary
Requirements
The standard retainer type for each
basic bearing is shown in table 8a.
Other retainer types may be applied.
Common supplemental requirements
are shown in table 8a.
Step 4
Specify Feature (shields)
The standard feature codes for each
basic bearing are shown in table 8a.
Table 8a.
Material
C = 52100 chromium-alloy
steel rings and balls
D = 52100 chromium-alloy
steel rings and titaniumcarbide coated balls
E = 52100 chromium-alloy
steel rings and siliconnitride balls
S = 440C stainless-steel
rings and balls
T = 440C stainless-steel
rings and titaniumcarbide coated balls
Size
See
tables
8b & 8c
Retainer Type
M = one piece, machined,
through hole, phenolic
MR = full ball complement
(no retainer used)
MS = one piece, stamped,
through hole, SST
MSO = toroid separators,
Teflon
MST = slug separators, Teflon
MT = one piece, machined,
through hole,
aluminum bronze
Feature
E = wide inner
ring
Tolerance
3 = class 3
5 = ABEC 5P,
5T or 5F
(ABEC 5P
for 610
and 812
sizes)
7 = ABEC 7P,
7T or 7F
(ABEC 7P
for 610
and 812
sizes)
Radial Internal
Clearance
For angular contact bearings,
standard radial internal
clearances are:
Ball Standard
Size Radial Play (in.)
Supplementary
if Required
Lubricant other
than standard
Specific torque
requirement
1/16”, 3/32” 0.0003-0.0008 P38 Bore & O.D.
size coding
1/8” and 0.0007-0.0012 P712
larger
Duplex pair
designation
Contact angle 30˚ Nominal
P_ _ = indicates alternate
radial clearance(1)
U = 440C stainless-steel rings
and silicon-nitride balls
P followed by 2 to 4 digits indicates radial internal clearance range. For example our standard radial
internal clearance of P28 indicates a radial internal clearance of 0.0002 to 0.0008 in. Alternate radial
internal clearance ranges are available. For radial internal clearance ranges outside the standard
range or less than half this range, consult your Timken sales engineer.
(1)
W
W
W
FW
r
r
r
FD
B
B
WO
Fig. 8b. Non-flanged
equal
width.
Broken
Corners
r
D
D
B
B
FD
r
r
D
D
FD
Fig. 8c. Non-flanged extended inner.
Broken Corners
WI
WO
FW
r
r
D
D
29
WI
WO
WI
WO
FW
D
B
WI
W
B
B
Broken Corners
D
FD
B
Broken Corners
Non-Flanged Equal Width
Equal WidthFlanged Equal
Non-Flanged
Flanged
Non-FlangedFlanged
Equal Width
Width
Non-Flanged Wide
Inner
Flanged Wide Inner
Extendedseries
Inner instrument Extended
Inner
Table 8b. Boundary dimensions, thin-section, angular-contact
ball bearings
Diameters
Chassis
610
812
1014
1216
1418
1622
1721
2024
2226
2428
2430
2630
3240
3242
4048
4050
4856
4858
5664
5666
6472
64-74
64-76
64-80
68-76
68-78
(1)
Bore
O.D.
B
D
mm
in.
9.525
0.3750
12.700
0.5000
15.875
0.6250
19.050
0.7500
22.225
0.8750
25.400
1.0000
26.988
1.0625
31.750
1.2500
34.925
1.3750
38.100
1.5000
38.100
1.5000
41.275
1.6250
50.800
2.0000
50.800
2.0000
63.500
2.5000
63.500
2.5000
76.200
3.0000
76.200
3.0000
88.900
3.5000
88.900
3.5000
101.600
4.0000
101.600
4.0000
101.600
4.0000
101.600
4.0000
107.950
4.2500
107.950
4.2500
mm
in.
15.875
0.6250
19.050
0.7500
22.225
0.8750
25.400
1.0000
28.575
1.1250
34.925
1.3750
33.338
1.3125
38.100
1.5000
41.275
1.6250
44.450
1.7500
47.625
1.8750
47.625
1.8750
63.500
2.5000
66.675
2.6250
76.200
3.0000
79.375
3.1250
88.900
3.5000
92.075
3.6250
101.600
4.0000
104.775
4.1250
114.300
4.5000
117.475
4.6250
120.650
4.7500
127.000
5.0000
120.650
4.7500
123.825
4.8750
Width
Radius(1)
W
r
mm
in.
3.962
0.1560
3.962
0.1560
3.962
0.1560
3.962
0.1560
3.962
0.1560
4.763
0.1875
3.962
0.1560
3.962
0.1560
3.962
0.1560
3.962
0.1560
4.763
0.1875
3.962
0.1560
6.350
0.2500
7.938
0.3125
6.350
0.2500
7.938
0.3125
6.350
0.2500
7.938
0.3125
6.350
0.2500
7.938
0.3125
6.350
0.2500
7.938
0.3125
9.525
0.3750
12.700
0.5000
6.350
0.2500
7.938
0.3125
mm
in.
0.25
0.010
0.25
0.010
0.25
0.010
0.25
0.010
0.25
0.010
0.38
0.015
0.25
0.010
0.25
0.010
0.25
0.010
0.25
0.010
0.38
0.015
0.25
0.010
0.64
0.025
1.02
0.040
0.64
0.025
1.02
0.040
0.64
0.025
1.02
0.040
0.64
0.025
1.02
0.040
0.64
0.025
1.02
0.040
1.02
0.040
1.52
0.060
0.64
0.025
1.02
0.040
r is the maximum radius of shaft or housing fillet that bearing corner will clear.
Ball Complement
Ball
Quantity
16
21
24
30
32
28
38
44
48
52
40
56
42
34
52
42
62
50
70
58
80
66
54
47
86
63
Ball
Diameter
Radial Static
Steel
mm
in.
1.59
1/16
1.59
1/16
1.59
1/16
1.59
1/16
1.59
1/16
2.38
3/32
1.59
1/16
1.59
1/16
1.59
1/16
1.59
1/16
2.38
3/32
1.59
1/16
3.18
1/8
3.97
5/32
3.18
1/8
3.97
5/32
3.18
1/8
3.97
5/32
3.18
1/8
3.97
5/32
3.18
1/8
3.97
5/32
4.76
3/16
6.35
1/4
3.18
1/8
3.97
5/32
mm
in.
386
87
528
119
619
139
789
177
852
192
2197
494
1028
231
1203
270
1320
297
1436
323
3252
731
1553
349
6035
1357
7515
1689
7587
1706
9453
2125
9141
2055
11395
2562
9635
2166
11987
2695
11078
2490
13750
3091
15752
3541
22339
5022
11938
2684
14210
3195
Load Ratings
Radial Static
Ceramic
Hybrid
N
lbf
244
55
335
75
393
88
500
112
541
122
1423
320
652
147
764
172
838
188
913
205
2108
474
987
222
3872
870
4862
1093
4869
1095
6119
1376
5868
1319
7378
1659
6029
1355
7482
1682
6933
1559
8579
1929
9807
2205
13962
3139
7472
1680
8867
1993
Radial
Dynamic
N
lbf
827
186
947
213
993
223
1108
249
1118
251
2610
587
1196
269
1266
285
1308
294
1348
303
3017
678
1386
312
5189
1166
7143
1606
5654
1271
7800
1753
6059
1362
8369
1881
5928
1333
8195
1842
6245
1404
8617
1937
10899
2450
17015
3825
6443
1449
8646
1944
Continued on next page.
30
Table 8b continued.
Table 8b. Boundary dimensions, thin-section, angular-contact series instrument ball bearings
Diameters
Chassis
68-80
68-84
72-80
72-82
72-84
72-88
76-84
76-86
76-88
76-92
80-88
80-90
80-92
80-96
88-96
Bore
O.D.
B
D
mm
in.
107.950
4.2500
107.950
4.2500
114.300
4.5000
114.300
4.5000
114.300
4.5000
114.300
4.5000
120.650
4.7500
120.650
4.7500
120.650
4.7500
120.650
4.7500
127.000
5.0000
127.000
5.0000
127.000
5.0000
127.000
5.0000
139.700
5.5000
mm
in.
127.000
5.0000
133.350
5.2500
127.000
5.0000
130.175
5.1250
133.350
5.2500
139.700
5.5000
133.350
5.2500
136.525
5.3750
139.700
5.5000
146.050
5.7500
139.700
5.5000
142.875
5.6250
146.050
5.7500
152.400
6.0000
152.400
6.0000
Width
Radius(1)
W
r
mm
in.
9.525
0.3750
12.700
0.5000
6.350
0.2500
7.938
0.3125
9.525
0.3750
12.700
0.5000
6.350
0.2500
7.938
0.3125
9.525
0.3750
12.700
0.5000
6.350
0.2500
7.938
0.3125
9.525
0.3750
12.700
0.5000
6.350
0.2500
mm
in.
1.02
0.040
1.52
0.060
0.64
0.025
1.02
0.040
1.02
0.040
1.52
0.060
0.64
0.025
1.02
0.040
1.02
0.040
1.52
0.060
0.64
0.025
1.02
0.040
1.02
0.040
1.52
0.060
0.64
0.025
Ball Complement
Ball
Quantity
58
44
90
72
62
46
94
76
64
50
100
80
68
52
110
Ball
Diameter
Radial Static
Steel
mm
in.
4.76
3/16
6.35
1/4
3.18
1/8
3.97
5/32
4.76
3/16
6.35
1/4
3.18
1/8
3.97
5/32
4.76
3/16
6.35
1/4
3.18
1/8
3.97
5/32
4.76
3/16
6.35
1/4
3.18
1/8
mm
in.
16980
3817
23510
5285
12522
2815
15087
3392
18209
4094
24681
5548
13104
2946
15965
3589
18852
4238
26927
6053
13966
3140
16842
3786
20083
4515
28098
6317
15411
3465
Load Ratings
Radial Static
Ceramic
Hybrid
N
lbf
10572
2377
14697
3304
7838
1762
9415
2117
11339
2549
15430
3469
8203
1844
9964
2240
11740
2639
16837
3785
8743
1965
10512
2363
12508
2812
17571
3950
9648
2169
Radial
Dynamic
N
lbf
11248
2529
17286
3886
6536
1469
8842
1988
11581
2604
17549
3945
6627
1490
9031
2030
11657
2621
18295
4113
6806
1530
9213
2071
11970
2691
18531
4166
7059
1587
Table 8c. Boundary dimensions, thin-section, angular-contact series instrument ball bearings
Diameters
Chassis
1017
1219
1421
1724
2128
2532
2936
3342
3746
4152
4556
4962
(1)
Bore
O.D.
B
D
mm
in.
15.875
0.6250
19.050
0.7500
22.225
0.8750
26.988
1.0625
33.338
1.3125
39.688
1.5625
46.038
1.8125
52.388
2.0625
58.738
2.3125
65.088
2.5625
71.438
2.8125
77.788
3.0625
mm
in.
26.988
1.0625
30.163
1.1875
33.338
1.3125
38.100
1.5000
44.450
1.7500
50.800
2.0000
57.150
2.2500
66.675
2.6250
73.025
2.8750
82.550
3.2500
88.900
3.5000
98.425
3.8750
Width
Extended
Equal Width
Inner Ring
Rings
Wi
Wi and Wo
mm
mm
in.
in.
6.350
7.137
0.2500
0.2810
6.350
7.137
0.2500
0.2810
6.350
7.137
0.2500
0.2810
6.350
7.137
0.2500
0.2810
6.350
7.137
0.2500
0.2810
6.350
7.137
0.2500
0.2810
6.350
7.137
0.2500
0.2810
6.350
7.137
0.2500
0.2810
6.350
7.137
0.2500
0.2810
7.938
9.525
0.3125
0.3750
7.938
9.525
0.3125
0.3750
7.938
9.525
0.3125
0.3750
Radius(1)
r
mm
in.
0.38
0.015
0.38
0.015
0.38
0.015
0.38
0.015
0.38
0.015
0.38
0.015
0.38
0.015
0.38
0.015
0.38
0.015
0.38
0.015
0.38
0.015
0.38
0.015
r is the maximum radius of shaft or housing fillet that bearing corner will clear.
Ball Complement
Ball
Quantity
16
18
20
24
28
34
38
44
48
36
39
42
Ball
Diameter
mm
in.
3.18
1/8
3.18
1/8
3.18
1/8
3.18
1/8
3.18
1/8
3.18
1/8
3.18
1/8
3.18
1/8
3.18
1/8
4.76
3/16
4.76
3/16
4.76
3/16
Load Ratings
Radial Static
Radial Static
Ceramic
Steel
Hybrid
N
N
lbf
lbf
1986
1269
446
285
2302
1472
518
331
2621
1677
589
377
3232
2070
727
465
3865
2477
869
557
4778
3063
1074
689
5409
3469
1216
780
6343
4069
1426
915
6974
4475
1568
1006
11547
7521
2596
1691
12606
8212
2834
1846
13694
8923
3079
2006
Radial
Dynamic
N
lbf
3398
764
3603
810
3780
850
4124
927
4384
986
4801
1079
4998
1124
5296
1191
5453
1226
10220
2298
10542
2370
10765
2420
31
C
2128
B
S
*
5
P712 DB30
1 2 3 4 5 6 7 8
Fig. 9a. Family 9 part number.
* - nil, leave no space
Family 9
Thin-section/
torque-tube,
fractured-race
series
To build your TSO part number
in this family of bearings, follow
the steps shown here.
Step 1
Specify Material Code
Step 5
Specify Features
Go to table 9a. The majority of
bearings listed under this family
are manufactured from either 440C
stainless-steel or 52100 steel.
Feature option is shown in table 9a.
Step 6
Specify Tolerance
The applicable ABEC class is noted for
each basic bearing listed in table 9a.
Step 2
Specify Size
Boundary dimensions for all bearings
included in this family are shown in
tables 9b and 9c.
Step 7
Specify Radial Internal
Clearance
Step 3
Specify Bearing Type (shields)
See table 9a for standard radial internal
clearances for this family. Alternate
radial clearance ranges are available.
Choice of shield options is shown in
table 9a.
Step 4
Specify Retainer Type
The standard retainer type for each
basic bearing is shown in table 9a.
Other retainer types may be applied.
Step 8
Specify Any Supplementary
Requirements
Common supplemental requirements
are shown in table 9a.
Table 9a.
Material
Size
C = 52100 chromium-alloy
steel rings and balls
See
tables
9b &
9c
D = 52100 chromium-alloy
steel rings and
titanium-carbide
coated balls
E = 52100 chromium-alloy
steel rings and siliconnitride balls
S = 440C stainless-steel
rings and balls
T = 440C stainless-steel
rings and titaniumcarbide coated balls
U = 440C stainless-steel
rings and siliconnitride balls
Bearing
Type
B = fractured
outer ring
BI = fractured
outer
ring,
integral
shields
Retainer Type
M = one piece, machined,
through hole, phenolic
MT = one piece, machined,
through hole,
Aluminum Bronze
S = one piece, stamped,
through hole,
stainless-steel
SO = toroid separators,
Teflon
ST = slug separators,
Teflon
Feature
E = wide
inner
ring
Radial Internal
Clearance
3 = class 3
For fractured race bearings,
standard radial internal
5 = ABEC 5P,
clearances are:
5T or 5F
Ball Standard
(ABEC 5P
Size Radial Play (in.)
for 610
and 812 1/16”, 3/32” 0.0003-0.0008 P38
1/8” and 0.0005-0.0015 P515
sizes)
larger
7 = ABEC 7P,
P_ _ = indicates alternate
7T or 7F
(1)
(ABEC 7P radial clearance
for 610
and 812
sizes)
Tolerance
Supplementary
if Required
Lubricant
other than
standard
Specific
torque
requirement
Bore & O.D.
size coding
Duplex pair
designation
No = Full complement
code = (no retainer used)
“P followed by 2 to 4 digits indicates radial internal clearance range. For example our standard radial
internal clearance of P28 indicates a radial internal clearance of 0.0002 to 0.0008 in. Alternate radial
internal clearance ranges are available. For radial internal clearance ranges outside the standard
range or less than half this range, consult your Timken sales engineer.
(1)
32
W
W
r
r
WO
WO
r
r
D
D
B
WI
FW
W FW
W
WI
FD
B
r
B
FD
Fig. 9b. Non-flanged equal width.
B
FD
Fig. 9c. Non-flanged extended inner.
Broken Corners
Broken Corners
r
r
D
D
B
WO
FW
r
D
D
WI
WI
WO
B
B
Broken Corners
Non-FlangedFlanged
Equal Width
Width
Non-Flanged Wide
Inner
Non-Flanged Equal Width
Equal WidthFlanged Equal
Non-Flanged
Flanged
Extended
Inner
Extended
Inner
Table 9b. BoundAry dimensions, thin-section, fractured-race,
instrument ball bearings
Diameters
Ball
Diameter
Radial Static
Steel
mm
in.
N
lbf
Load Ratings
Radial Static
Ceramic
Hybrid
N
lbf
24
1.59
1/16
579
130
366
82
1084
244
0.25
0.010
31
1.59
1/16
779
175
494
111
1228
276
3.962
0.1560
0.25
0.010
37
1.59
1/16
955
215
605
136
1325
298
3.962
0.1560
0.25
0.010
43
1.59
1/16
1130
254
717
161
1409
317
Width
Radius(1)
Wo
r
mm
in.
mm
in.
mm
in.
9.525
0.3750
15.875
0.6250
3.962
0.1560
0.254
0.010
812
12.700
0.5000
19.050
0.7500
3.962
0.1560
1014
15.875
0.6250
22.225
0.8750
1216
19.050
0.7500
25.400
1.0000
Bore
O.D.
B
D
mm
in.
610
Chassis
Ball Complement
Ball
Quantity
D
D
FD
Broken Corners
Flanged Wide Inner
Radial
Dynamic
N
lbf
Table 9c. BoundAry dimensions, torque-tube, fractured-race,
instrument ball bearings
Diameters
Ball
Diameter
Radial Static
Steel
mm
in.
N
lbf
Load Ratings
Radial Static
Ceramic
Hybrid
N
lbf
21
3.18
1/8
2589
582
1650
371
4058
912
0.38
0.015
24
3.18
1/8
3049
685
1945
437
4348
977
7.137
0.2810
0.38
0.015
27
3.18
1/8
3515
790
2244
504
4598
1034
6.350
0.2500
7.137
0.2810
0.38
0.015
32
3.18
1/8
4282
963
2736
615
4975
1118
44.450
1.7500
6.350
0.2500
7.137
0.2810
0.38
0.015
38
3.18
1/8
5213
1172
3332
749
5351
1203
39.688
1.5625
50.800
2.0000
6.350
0.2500
7.137
0.2810
0.38
0.015
44
3.18
1/8
6144
1381
3930
884
5676
1276
2936
46.038
1.8125
57.150
2.2500
6.350
0.2500
7.137
0.2810
0.38
0.015
50
3.18
1/8
7073
1590
4525
1017
5975
1343
3342
52.388
2.0625
66.675
2.6250
6.350
0.2500
7.137
0.2810
0.38
0.015
58
3.18
1/8
8309
1868
5319
1196
6339
1425
3746
58.738
2.3125
73.025
2.8750
6.350
0.2500
7.137
0.2810
0.38
0.015
64
3.18
1/8
9241
2078
5916
1330
6577
1479
4152
65.088
2.5625
82.550
3.2500
7.938
0.3125
9.525
0.3750
0.38
0.015
48
4.76
3/16
15328
3446
9966
2240
12347
2776
4556
71.438
2.8125
88.900
3.5000
7.938
0.3125
9.525
0.3750
0.38
0.015
52
4.76
3/16
16734
3762
10882
2446
12736
2863
4962
77.788
3.0625
98.425
3.8750
7.938
0.3125
9.525
0.3750
0.38
0.015
58
4.76
3/16
18829
4233
12247
2753
13313
2993
Radius(1)
O.D.
B
D
mm
in.
mm
in.
1017
15.875
0.6250
26.988
1.0625
6.350
0.2500
7.137
0.2810
0.38
0.015
1219
19.050
0.7500
30.163
1.1875
6.350
0.2500
7.137
0.2810
1421
22.225
0.8750
33.338
1.3125
6.350
0.2500
1724
26.988
1.0625
38.100
1.5000
2128
33.338
1.3125
2532
Chassis
(1)
Width
Extended
Equal Width
Inner Ring
Rings
Wi
Wi and Wo
mm
mm
in.
in.
Bore
r
Ball Complement
Ball
Quantity
mm
in.
r is the maximum radius of shaft or housing fillet that bearing corner will clear.
B
Radial
Dynamic
N
lbf
33
Appendix
Codes for use
in TSO part
specification
Lubrication:
LD no lubrication or dry bearings.
LO followed by a number indicates specified oil
lubrication.
LG followed by a number indicates other specified
grease lubrication.
LY followed by a number indicates other Timkenapproved lubricants.
LOV or LYV followed by a number indicates specified
oil to be vacuum impregnated into the retainer.
LOC or LYC followed by a number indicates specified
oil to be used and the bearing centrifuged.
LGF or LYF followed by a number indicates film of a
specific grease.
Standard
Lubrication is
dip and drain
with Timken
LO1 lubricant.
Torque: (Applicable to miniature sizes):
Q Q followed by a number indicates peak starting torque
limit in hundreds of mg•mm. For example, Q14 indicates a
bearing with less than 1400 mg•mm peak starting torque.
V V followed by a number indicates peak running torque
limit in hundreds of mg•mm. For example, V13 indicates a
bearing with less than 1300 mg•mm peak running torque.
Torque is measured under a 75 gram thrust load for bearings having an O.D. of 3/8 in. or less. Larger cataloged
bearings are measured under a test load of 400 grams.
Preloaded Pairs:
DB back-to-back mounting
DF face-to-face mounting
DT tandem mounting
Numbers following letter code
indicate nominal preload or preload range
in pounds.
Dimensional Coding:
ZO graded O.D.’s only
ZB graded bores only
ZD graded O.D.’s and bores
ZDM graded for preloaded pairs
having matched O.D.’s and
bores
Standard dimensional grading is in
increments of 0.0001 in. “X” prefix for
0.000050 in. increments.
Bearings • Steel •
Power Transmission Systems •
Precision Components • Seals •
Lubrication • Industrial Services •
Remanufacture and Repair
www.timken.com
06-11: Order No. 10454
Timken® and Where You Turn® are registered trademarks of The Timken Company • © 2011 The Timken Company • Printed in U.S.A.
34
