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Boston Gear - Spur Gears

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Boston Gear - Spur Gears
Gear catalog from Boston Gear about Spur Gears.

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Content

SPUR GEARS

SECTION CONTENTS
14-1/2° PRESSURE ANGLE – CATALOG NUMBER / DIMENSIONS
Spur Gears................................................................................................................................. 6 – 15
Change Gears........................................................................................................................... 16 – 20
Stem Pinions .................................................................................................................................... 21
Drawn Pinion Wire ........................................................................................................................... 22
Rack................................................................................................................................................... 23
Internal Gears ................................................................................................................................... 24
20° PRESSURE ANGLE – CATALOG NUMBER / DIMENSIONS
Spur Gears................................................................................................................................ 25 – 34
Rack................................................................................................................................................... 35
Internal Gears ................................................................................................................................... 36
Selection Procedure ................................................................................................................................. 37
Horsepower & Torque Ratings........................................................................................................ 38 – 50
Gear Gauges ............................................................................................................................................. 50
Stock Altered/Custom Spur Gears ................................................................................................. 87 – 89
Spur Gear Engineering Information ........................................................................................... 134 – 139

Gear Catalog

5
®

SPUR GEARS
141/2° PRESSURE ANGLE

48 AND 32 DIAMETRAL PITCH
BRASS

(Will not operate with 20° spurs)
ALL DIMENSIONS IN INCHES
ORDER BY CATALOG NUMBER OR ITEM CODE

No.
of
Teeth

Pitch
Dia.

Bore

Dia.

Proj.

DIAMETRAL PITCH

FACE

PITCH
DIA.

HUB
PROJ.

HUB
DIA.

BORE

OVERALL
LENGTH

.208
.250
.292
.312
.333
.375
.417
.458
.500
.542
.667
.750
.833
.917
1.000
1.125
1.250
1.375
1.500
1.750
2.000
2.083
2.500
3.000
4.000

.0935



BRASS


.125





.1875





.250

.50

.25

.3125

.62

.31

32
STANDARD TOLERANCES

48 D.P.

48 D.P.

TOLERANCE
±.0005

32 D.P.

32 D.P.

A

D

G127
G129
G130
G131
G132
G133
G134
G135
G136
G137
G138
G139
G140
G141
G142
G143
G144
G145
G146
G147
G148
G154
G149
G150
G151

09322
09324
09326
09328
09330
09332
09334
09336
09338
09340
09342
09344
09346
09348
09350
09352
09354
09356
09358
09360
09362
09364
09366
09368
09370

Face = .062"
Outside Dia. = Pitch Dia. + .062"

DIAMETRAL PITCH
DIMENSION
BORE
All

Without Keyway
or Setscrew
Catalog
Item
Number
Code

Face = .125"
Outside Dia. = Pitch Dia. + .042"
Overall Length = .125" + Hub Proj.

48

10
12
14
15
16
18
20
22
24
26
32
36
40
44
48
54
60
66
72
84
96
100
120
144
192

Style
See
Page
150

Hub

BRASS
10
14
16
20
24
28
32
40
48
64
80
96
112
128

.312
.438
.500
.625
.750
.875
1.000
1.250
1.500
2.000
2.500
3.000
3.500
4.000

8
10
12
14
15
16
18
20
22
24
26
28
30
32
36
40
44
48
52
56

.250
.312
.375
.438
.469
.500
.562
.625
.688
.750
.812
.875
.938
1.000
1.125
1.250
1.375
1.500
1.625
1.750

.125





.1875





.250





.3125





.375





A

G96
G98
G99
G101
G102
G103
G104
G105
G106
G110
G111
G112
G113
G114

09234
09238
09240
09244
09246
09248
09250
09252
09254
09256
09258
09260
09262
09264

G159
G161
G163
G165
G166
G167
G168
G169
G170
G171
G172
G173
G174
G175
G176
G177
G178
G179
G180
G181

09266
09268
09270
09272
09274
09276
09278
09280
09282
09284
09286
09288
09290
09292
09294
09296
09298
09300
09302
09304

Face = .188"

REFERENCE PAGES
Alterations — 149
Lubrication — 149
Materials — 150

.125





.1875





.250









.3125

(continued next page)

6

Gear Catalog
®

A

SPUR GEARS
141/2° PRESSURE ANGLE

32 AND 24 DIAMETRAL PITCH
BRASS AND STEEL

(Will not operate with 20° spurs)
ALL DIMENSIONS IN INCHES
ORDER BY CATALOG NUMBER OR ITEM CODE

No.
of
Teeth

Hub
Pitch
Dia.

Bore

Dia.

Proj.

Style Without Keyway
or Setscrew
See
Page Catalog Item
150 Number Code

Face = .188"
Outside Dia. = Pitch Dia. + .062"
Overall Length = .187" + Hub Proj.

32

DIAMETRAL PITCH
64
72
80
96
112
128

2.000
2.250
2.500
3.000
3.500
4.000

16
20
22
24
28
32
40
48
56
64
80
96
16
18
20
22
24
26
28
30
32
40
48
56
64
80
96
128
160
192

.500
.625
.688
.750
.875
1.000
1.250
1.500
1.750
2.000
2.500
3.000
.500
.562
.625
.688
.750
.812
.875
.938
1.000
1.250
1.500
1.750
2.000
2.500
3.000
4.000
5.000
6.000

.25
.3125

With
Setscrew
Catalog Item
Number Code

BRASS
B
C

.62
.31

D

.75

G182
G183
G184
G185
G186
G187

09306
09308
09310
09312
09314
09316















STEEL

HUB
PROJ.

FACE

PITCH
DIA.

HUB
DIA.

BORE

OVERALL
LENGTH

STANDARD TOLERANCES
DIMENSION
BORE
All

32 D.P.
D.P.
32

TOLERANCE
±.0005

24 D.P.
24
D.P.

.1875





.250





.3125
.375
.3125







.375





.1875

.39
.45
.52
.58
.64
.70
.75
.75
.75

.31

.88

.38

1.00

.38

1.12
1.25
1.88
2.12
2.12

.38
.50
.50
.50
.50

.250

.3125

.375

.31

A

.31
.38

24

DIAMETRAL PITCH

S3216 09572


S3220 09574


S3222 09576


S3224 09578


S3228 09580


S3232 09582


S3240 09584


S3248 09586


S3256 09588


S3264 09590


S3280 09592


S3296 09594




H3216
09536


H3218
09538


H3220
09540


H3222
09542


H3224
09544


H3226
09546


H3228
09548


H3230
09550


H3232
09552


H3240
09554


H3248
09556


H3256
09558


H3264
09560


H3280
09562


H3296
09564


H32128 09566


H32160 09568


H32192 09570
Face = .250"
Outside Dia. = Pitch Dia. + .083"
Overall Length = .250" + Hub Proj.

BRASS

REFERENCE PAGES
Alterations — 149
Horsepower Ratings — 38
Lubrication — 149
Materials — 150
Selection Procedure — 37

12
16
18
24
30
36
42
48
54
60
66
72
84
96
120
144

.500
.667
.750
1.000
1.250
1.500
1.750
2.000
2.250
2.500
2.750
3.000
3.500
4.000
5.000
6.000

.1875

.38
.50
.50

.25

.250

.62

.25

.62

.25

B

.3125

.69

.31

C

.375

.75
.75
.75
.88
.88

.31
.31
.31
.38
.38

D

A

G254
G256
G257
G258
G259
G261
G263
G264
G265
G266
G267
G268
G269
G270
G272
G274

09202
09204
09206
09208
09210
09212
09214
09216
09218
09220
09222
09224
09226
09228
09230
09232



































(continued next page)

Gear Catalog

7
®

SPUR GEARS
141/2° PRESSURE ANGLE

24 AND 20 DIAMETRAL PITCH
STEEL

(Will not operate with 20° spurs)
ALL DIMENSIONS IN INCHES
ORDER BY CATALOG NUMBER OR ITEM CODE

No.
of
Teeth

Style Without Keyway
or Setscrew
See
Page Catalog Item
Proj. 150 Number Code

Hub
Pitch
Dia.

Bore

Dia.

With Keyway
& Setscrew†
Catalog
Item
Number
Code

Face = .250"
Outside Dia. = Pitch Dia. + .083"
Overall Length = .250" + Hub Proj.

24

DIAMETRAL PITCH
STEEL

FACE

HUB
PROJ.
KEYWAY

PITCH
DIA.

HUB
DIA.

BORE

OVERALL
LENGTH

STANDARD TOLERANCES
DIMENSION
BORE
All

TOLERANCE
±.0005

12
15
16
18
21
24
30
36
42
48
60
72
12
14
15
16
18
20
21
24
30
36
42
48
60
72
96
120
144

.500
.625
.667
.750
.875
1.000
1.250
1.500
1.750
2.000
2.500
3.000
.500
.583
.625
.667
.750
.833
.875
1.000
1.250
1.500
1.750
2.000
2.500
3.000
4.000
5.000
6.000

.375













.500





.250
.3125

.250
.3125

.375

.500

.36
.46
.50
.54
.62
.70
.74
.87
1.00
1.12
1.12
1.25
1.25
1.38
2.00
2.25
2.25

.31

A

.31
.31

.38

.50

20

DIAMETRAL PITCH

S2412
09630


S2415
09632


S2416
09634


S2418
09636


S2421
09638


S2424
09640


S2430
09642


S2436
09644


S2442
09646


S2448
09648


S2460
09650


S2472
09652




H2412†
09596


H2414†
09598


H2415‡
09600


H2416
09602


H2418
09604


H2420
09606


H2421
09608


H2424
09610


H2430
09612


H2436
09614


H2442
09616


H2448
09618


H2460
09620


H2472
09622


H2496
09624


H24120
09626


H24144
09628
Face = .375"
Outside Dia. = Pitch Dia. + .100"
Overall Length = .375" + Hub Proj.

STEEL
11
12
13
14
15
16
18

.600*
.600
.650
.700
.750
.800
.900

20

1.000

22

1.100

24

1.200

25

1.250

28

1.400

*Special Pitch Diameter, used for calculating Center
Distance only, not Ratio.

30

1.500

†H2412 & H2414 have #35 (.110) drilled hole through
one wall, no keyway.

32

1.600

35

1.750

36

1.800

40

2.000

24 D.P.
D.P.
32
20
D.P.

2024
D.P.D.P.
16
D.P.

REFERENCE PAGES
Alterations — 149
Horsepower Ratings — 38, 39
Lubrication — 149
Materials — 150
Selection Procedure — 37

‡H2415-H24144 has one setscrew, no keyway.
**NA11B-5/16"-NA14B-5/16 bore has #35 (.110) drilled
hole through one wall, no keyway.
††3/8" & 1/2" bores have one setscrew, no keyway.
NA40-5/8" & NA40-3/4" bores have standard keyway at
90° to setscrew. See Page 150.

.3125

.375
.375
.500
.375
.500
.375
.500
.375
.500
.375
.500
.375
.500
.375
.500
.375
.500
.375
.500
.375
.500
.625
.750

48
2.400
50
2.500
.375
60
3.000
64
3.200
(continued next page)

8

Gear Catalog
®

.46
.46
.50
.56
.60
.66
.74

.38

.38

.84

.38

.82

.38

.92

.38

.97

.38

1.12

.38

1.22

.38

1.32

.50

1.47

.50

1.52

.50

1.72

.50

1.33
1.42
1.92
2.12

.50

A

NA11B
NA12B
NA13B
NA14B
NA15B
NA16B
NA18B
NA20B

NA22B

NA24

NA25B

NA28B

NA30B

NA32

NA35

NA36

NA40



NA48A
NA50A
NA60A
NA64A

09662
09664
09666
09668
09670
09672
09674
09676

09678

09680

09682

09684

09686

09688

09690

09692

09694



10208
10210
10212
10214

NA11B-5/16** 46000
NA12B-5/16** 46001
NA13B-5/16** 46002
NA14B-5/16** 46003
NA15B-3/8†† 46004
NA16B-3/8†† 46005
NA18B-3/8†† 46006
NA20B-3/8†† 46007
NA20B-1/2†† 46008
NA22B-3/8†† 46009
NA22B-1/2†† 46010
NA24-3/8†† 46011
NA24-1/2†† 46012
NA25B-3/8†† 46013
NA25B-1/2†† 46014
NA28B-3/8†† 46015
NA28B-1/2†† 46016
NA30B-3/8†† 46017
NA30B-1/2†† 46018
NA32-3/8†† 46019
NA32-1/2†† 46020
NA35-3/8†† 46021
NA35-1/2†† 46022
NA36-3/8†† 46023
NA36-1/2†† 46024
NA40-3/8†† 46025
NA40-1/2†† 46026
NA40-5/8
46027
NA40-3/4
46028









SPUR GEARS
141/2° PRESSURE ANGLE

20 AND 16 DIAMETRAL PITCH
CAST IRON, BRASS AND STEEL

(Will not operate with 20° spurs)
ALL DIMENSIONS IN INCHES
ORDER BY CATALOG NUMBER OR ITEM CODE

No.
of
Teeth

Style Without Keyway
or Setscrew
See
Page Catalog Item
Proj. 150 Number Code

Hub
Pitch
Dia.

Bore

Dia.

Face = .375”
Outside Dia. = Pitch Dia. + .100”
Overall Length = .375” + Hub Proj.

20

DIAMETRAL PITCH
70
72
80
84
90
96
100
112
120
140
144
160
180
200

HUB
PROJ.

FACE

KEYWAY

PITCH
DIA.

HUB
DIA.

BORE

3.500
3.600
4.000
4.200
4.500
4.800
5.000
5.600
6.000
7.000
7.200
8.000
9.000
10.000

.375

1.25

.500

1.25

.500

1.50

2.25

16

DIAMETRAL PITCH
8
9
10
12
14
16
18
20
24
28
32
40
48
56
64
80

.500
.563
.625
.750
.875
1.000
1.125
1.250
1.500
1.750
2.000
2.500
3.000
3.500
4.000
5.000

11
12
13
14
15
16
18

.750*
.750
.813
.875
.938
1.000
1.125

20

1.250

22

1.375

24

1.500

†3/8" and 1/2" bores have one setscrew, no keyway.

26

1.625

5/8" bore and larger have standard keyway at 90° to
setscrew. See Page 150.

28

1.750

30

1.875

OVERALL
LENGTH

STANDARD TOLERANCES
DIMENSION
BORE
All

20 D.P.
20
D.P.

TOLERANCE
±.0005

16 D.P.
D.P.
16

REFERENCE PAGES
Alterations — 149
Horsepower Ratings — 39, 40
Lubrication — 149
Materials — 150
Selection Procedure — 37
*Special Pitch Diameter, used for calculating Center
Distance only, not Ratio.

.1875



.250



.3125




.3125

.75

.375

.88
1.00
1.00

.375

.500
.500
.625
.500
.625
.500
.625
.750
.500
.625
.750
.500
.625
.750
.875
.500
.625
.750
.875
1.000

With Keyway
and Setscrew†
Catalog
Item
Number
Code

.56
.56
.63
.69
.75
.81
.94
.96
1.08
1.20
1.33

1.45

1.58

CAST IRON
NA70
10216


.50
NA72
10218


B
NA80
10220


NA84
10222


.50
NA90
10224


C
NA96
10226


NA100
10228


NA112
10230


NA120
10232


.50
NA140
10234


D
NA144
10236


NA160
10238


.62
NA180
10240


NA200B 10242


Face = .313"
Outside Dia. = Pitch Dia. + .125"
Overall Length = Face + Hub Proj.
BRASS
G226
09168
G227
09170
G228
09172
G229
09174
A
G230
09176

G231
09178
G232
09180
G233
09182

G235
09184

G236
09186
B
G237
09188
.31
G238
09190
G239
09192
D
G240
09194
.38
G241
09196
G242
09198
STEEL
Face = .500"
NB11B 09704
NB12B 09706
.44
NB13B 09708
NB14B 09710
NB15B 09712
.44
NB16B 09714
NB18B 09716
NB20B 09718
.44


NB22B 09720
.44


NB24B 09722
.44
A




NB26B 09724
.44




NB28B 09726


.50




NB30B 09728


.50










































NB11B-3/8†
NB12B-3/8†
NB13B-3/8†
NB14B-3/8†
NB15B-1/2†
NB16B-1/2†
NB18B-1/2†
NB20B-1/2†
NB20B-5/8
NB22B-1/2†
NB22B-5/8
NB24B-1/2†
NB24B-5/8
NB24B-3/4
NB26B-1/2†
NB26B-5/8
NB26B-3/4
NB28B-1/2†
NB28B-5/8
NB28B-3/4
NB28B-7/8
NB30B-1/2†
NB30B-5/8
NB30B-3/4
NB30B-7/8
NB30B-1

46029
46030
46031
46032
46033
46034
46035
46036
46037
46038
46039
46040
46041
46042
46043
46044
40645
46046
46047
46048
46049
46050
46051
46052
46053
46054

(continued next page)

Gear Catalog

9
®

SPUR GEARS
141/2° PRESSURE ANGLE

16 AND 12 DIAMETRAL PITCH
STEEL, NON-METALLIC AND CAST IRON

(Will not operate with 20° spurs)
ALL DIMENSIONS IN INCHES
ORDER BY CATALOG NUMBER OR ITEM CODE

No.
of
Teeth

Style Without Keyway
or Setscrew
See
Page Catalog Item
Proj. 150 Number Code

Hub
Pitch
Dia.

Bore

Dia.

With Keyway
and Setscrew†
Catalog
Item
Number
Code

Face = .500"
Outside Dia. = Pitch Dia. + .125"
Overall Length = .500" + Hub Proj.

16

DIAMETRAL PITCH
STEEL

HUB
PROJ.

FACE

KEYWAY

PITCH
DIA.

HUB
DIA.

BORE

OVERALL
LENGTH

STANDARD TOLERANCES
DIMENSION
BORE
All

TOLERANCE
±.0005

32

2.000

.500
.625
.750
.875
1.000

36
40
48

2.250
2.500
3.000

.500

16
20
24
32
40
48
64

1.000
1.250
1.500
2.000
2.500
3.000
4.000

54
56
60
64
72
80
84
96
112
120
128
144
160
192

3.375
3.500
3.750
4.000
4.500
5.000
5.250
6.000
7.000
7.500
8.000
9.000
10.000
12.000

.375

.500

.500

.625

.625

1.70
1.95
1.69
2.19
.81
1.06
1.31
1.81



1.25
1.25
1.38
1.38
1.38
1.50
1.50
1.50
1.50
1.50
1.50
1.75
1.75
2.00

NB32

.50

A


NB36
.50
NB40A
NB48A
NON-METALLIC
QBH16
.50
QBH20
.50
QBH24
.50
A
QBH32

QB40

QB48

QB64
CAST IRON
.50
NB54
.50
B
NB56
.62
NB60
NB64
NB72
C
NB80
.62

D
.75

12

DIAMETRAL PITCH

09730




09732
10244
10246

NB32-1/2
NB32-5/8
NB32-3/4
NB32-7/8
NB32-1




46055
46056
46057
46058
46059




09014
09018
09022
09024
09000
09002
09006

















10248


10250


10252


10254


10256


10258


NB84
10260


NB96
10262


NB112
10264


NB120
10266


NB128
10268


NB144
10270


NB160B 10272


NB192B 10274


Face = .750"
Outside Dia. = Pitch Dia. + .167"
Overall Length = .750" + Hub Proj.

STEEL
16 D.P.
D.P.
16

12 D.P.
D.P.
12

REFERENCE PAGES
Alterations — 149
Horsepower Ratings — 40, 41
Lubrication — 149
Materials — 150
Selection Procedure — 37
*Special Pitch Diameter, used for calculating Center
Distance only, not Ratio.

11
12
13
14
15
16
18

1.000*
1.000
1.083
1.167
1.250
1.333
1.500

20

1.667

21

1.750

22

1.833

24

2.000

30
32
36
40
42

2.500
2.667
3.000
3.333
3.500

†1/2" bore has one setscrew, no keyway.
5/8" bore and larger have standard keyway at 90° to
setscrew. See Page 150.

.500

.625
.625
.750
.625
.750
.875
.625
.750
.875
1.000
.625
.750
.875
1.000
.625

(continued next page)

10

Gear Catalog
®

.75
.75
.83
.92
1.00
.99
1.15

.50

.50

1.32

.50

1.40

.50
A

1.49

.50

1.65

.50

2.15
1.92
2.25
2.34
2.50

.62

ND11B
ND12B
ND13B
ND14B
ND15B
ND16B
ND18B
ND20B

ND21B


ND22B



ND24B



ND30
ND32A
ND36A
ND40A
ND42A

09744
09746
09748
09750
09752
09754
09756
09758

09760


09762



09764



09766
10276
10278
10280
10282

ND11B-1/2†
ND12B-1/2†
ND13B-1/2†
ND14B-1/2†
ND15B-5/8
ND16B-5/8
ND18B-5/8
ND20B-5/8
ND20B-3/4
ND21B-5/8
ND21B-3/4
ND21B-7/8
ND22B-5/8
ND22B-3/4
ND22B-7/8
ND22B-1
ND24B-5/8
ND24B-3/4
ND24B-7/8
ND24B-1






46060
46061
46062
46063
46064
46065
46066
46067
46068
46069
46070
46071
46072
46073
46074
46075
46076
46077
46078
46079






SPUR GEARS
141/2° PRESSURE ANGLE

12 AND 10 DIAMETRAL PITCH
STEEL, NON-METALLIC AND CAST IRON

(Will not operate with 20° spurs)
ALL DIMENSIONS IN INCHES
ORDER BY CATALOG NUMBER OR ITEM CODE

No.
of
Teeth

Pitch
Dia.

Bore

Dia.

12

DIAMETRAL PITCH

FACE

PITCH
DIA.

HUB
PROJ.

HUB
DIA.

BORE

OVERALL
LENGTH

15
18
21
24
30
36
48
60

1.250
1.500
1.750
2.000
2.500
3.000
4.000
5.000

48
54
60
64
72
84
96
108
112
120
144
168

4.000
4.500
5.000
5.333
6.000
7.000
8.000
9.000
9.333
10.000
12.000
14.000

.750

1.00
1.25
1.50
1.75
2.25




.750

1.75

.750

2.00

.875

2.00

.500

.625

10

DIAMETRAL PITCH

STANDARD TOLERANCES
DIMENSION
BORE
All

12 D.P.
12
D.P.

TOLERANCE
±.0005

10 D.P.
10
D.P.

REFERENCE PAGES
Alterations — 149
Horsepower Ratings — 41, 42
Lubrication — 149
Materials — 150
Selection Procedure — 37
*Special Pitch Diameter, used for calculating Center
Distance only, not Ratio.

†All gears have standard keyway at 90° to setscrew.
See Page 150.

Style Without Keyway
or Setscrew
See
Page Catalog Item
Proj. 150 Number Code

Hub

11
12
14
15
16

1.200*
1.200
1.400
1.500
1.600

18

1.800

20

2.000

24

2.400

25
28
30
32
35
36

2.500
2.800
3.000
3.200
3.500
3.600

15
18
20
25
30

1.500
1.800
2.000
2.500
3.000

.625
.750
.750
.875
.750
.875
1.000
.750
.875
1.000
.750
.750

.625
.750

.92
.92
1.02
1.12
1.22
1.42
1.62
2.02
2.12
1.81
2.02
2.22
2.52
2.61
1.20
1.50
1.70
2.20
2.70

With Keyway
and Setscrew†
Catalog
Item
Number
Code

Face = .750"
Outside Dia. = Pitch Dia. + .167"
Overall Length = .750" + Hub Proj.
NON-METALLIC
QDH15 09038


.50
QDH18 09042


QDH21 09046


QDH24 09050


.50
A
QDH30 09052



QD36
09026



QD48
09030



QD60
09034


CAST-IRON
ND48
10284


C
ND54
10286


ND60
10288


.75
ND64
10290


ND72
10292


ND84
10294


ND96
10296


D
ND108 10298


.75
ND112 10300


ND120 10302


ND144 10304


1.00
ND168 10306


Face = 1.000"
Outside Dia. = Pitch Dia. + .200"
Overall Length = 1.000" + Hub Proj.
STEEL
NF11B 09778 NF11B-5/8 46080
.62
NF12B 09780 NF12B-5/8 46081
NF14B 09782 NF14B-5/8 46082
NF15B 09784 NF15B-3/4 46083
.62
NF16B 09786 NF16B-3/4 46084
NF18B 09788 NF18B-3/4 46085
.62


NF18B-7/8 46086
NF20B 09790 NF20B-3/4 46087
.62


NF20B-7/8 46088
A


NF20B-1
46089
NF24B 09792 NF24B-3/4 46090
.62


NF24B-7/8 46091


NF24B-1
46092
.62
NF25
09794


NF28A 10310


NF30A 10312


.88
NF32A 10314


NF35A 10316


NF36A 10318


NON-METALLIC
QFH15 09062


.62
QFH18 09066


A
QFH20 09068


.62
QFH25 09070


QFH30 09072



(continued next page)

Gear Catalog

11
®

SPUR GEARS
141/2° PRESSURE ANGLE

10 AND 8 DIAMETRAL PITCH
CAST IRON, STEEL AND NON-METALLIC

(Will not operate with 20° spurs)
ALL DIMENSIONS IN INCHES
ORDER BY CATALOG NUMBER OR ITEM CODE

No.
of
Teeth

Pitch
Dia.

Bore

Dia.

DIAMETRAL PITCH

HUB
PROJ.

FACE

KEYWAY

PITCH
DIA.

HUB
DIA.

BORE

OVERALL
LENGTH

4.000
4.200
4.500
4.800
5.000
5.400
5.500
6.000
6.400
7.000
7.200
8.000
8.400
9.000
9.600
10.000
11.000
12.000
14.000
14.400
16.000
18.000

2.12
.875

2.25
2.25
1.00

2.50
2.75

8

DIAMETRAL PITCH

STANDARD TOLERANCES
DIMENSION
BORE
All

10D.P.
D.P.
10

TOLERANCE
±.0005

1.500*
1.500
1.750
1.875

16

2.000

18

2.250

20

2.500

22

2.750

24
28
30
32

3.000
3.500
3.750
4.000

16
18
20
24
28

2.000
2.250
2.500
3.000
3.500

D.P.
88 D.P.

REFERENCE PAGES
Alterations — 149
Horsepower Ratings — 42, 43
Lubrication — 149
Materials — 150
Selection Procedure — 37
*Special Pitch Diameter, used for calculating Center
Distance only, not Ratio.

†All gears have standard keyway, at 90° to setscrew.
See Page 150.

12

11
12
14
15

Gear Catalog
®

.750
.875
.875
1.000
.875
1.000
1.125
.875
1.000
1.125
.875
1.000
1.125
.875
1.000
.750
.875

(continued next page)

With Keyway
and Setscrew†
Catalog
Item
Number
Code

Face = 1.000"
Outside Dia. = Pitch Dia. + .200"
Overall Length = 1.000" + Hub Proj.

10

40
42
45
48
50
54
55
60
64
70
72
80
84
90
96
100
110
120
140
144
160
180

Style Without Keyway
or Setscrew
See
Page Catalog Item
Proj. 150 Number Code

Hub

1.12
1.12
1.31
1.43
1.56
1.81
2.06
2.31
2.06
2.56
2.75
3.00
1.62
1.88
2.12
2.62
3.12

CAST IRON
NF40
10320


NF42
10322


B
NF45
10324


NF48
10326


NF50
10328


C
NF54
10330


.88
NF55
10332


NF60
10334


NF64
10336


NF70
10338


NF72
10340


NF80
10342


NF84
10344


D
NF90
10346


NF96
10348


.88
NF100
10350


NF110
10352


NF120
10356


NF140
10358


1.00
NF144
10360


NF160
10362


NF180
10364


Face = 1.250"
Outside Dia. = Pitch Dia. + .250"
Overall Length = 1.250" + Hub Proj.
STEEL
NH11B 09806 NH11B-3/4 46093
.75
NH12B 09808 NH12B-3/4 46094
NH14B 09810 NH14B-3/4 46095
.75
NH15B 09812 NH15B-7/8 46096
NH16B 09814 NH16B-7/8 46097
.75


NH16B-1
46098
NH18B 09816 NH18B-7/8 46099
.75


NH18B-1
46100


NH18B-1-1/8 46101
A
NH20B 09818 NH20B-7/8 46102
.75


NH20B-1
46103


NH20B-1-1/8 46104
NH22B 09820 NH22B-7/8 46105
.75


NH22B-1
46106


NH22B-1-1/8 46107
NH24A 10368


.88
NH28A 10370


NH30A 10372


.88
NH32A 10374


NON-METALLIC
QHH16 09082


.75
QHH18 09084


A
QHH20 09086


.75
QHH24 09088


QHH28 09090



SPUR GEARS
141/2° PRESSURE ANGLE

8 AND 6 DIAMETRAL PITCH
CAST IRON AND STEEL

(Will not operate with 20° spurs)
ALL DIMENSIONS IN INCHES
ORDER BY CATALOG NUMBER OR ITEM CODE

No.
of
Teeth

Style Without Keyway
or Setscrew
See
Page Catalog Item
Proj. 150 Number Code

Hub
Pitch
Dia.

Bore

Dia.

Face = 1.250"
Outside Dia. = Pitch Dia. + .250"
Overall Length = 1.250" + Hub Proj.

8

DIAMETRAL PITCH

FACE

PITCH
DIA.

HUB
PROJ.

HUB
DIA.

BORE

OVERALL
LENGTH

36
40
42
44
48
54
56
60
64
72
80
84
88
96
112
120
128
144
160

DIMENSION
BORE
All

TOLERANCE
±.0005

14
15

18

6 D.P.
20

REFERENCE PAGES
Alterations — 149
Horsepower Ratings — 43, 44
Lubrication — 149
Materials — 150
Selection Procedure — 37

2.50

1.125

3.00

1.125

3.25

DIAMETRAL PITCH

16

88 D.P.
D.P.

1.000

6

11
12

STANDARD TOLERANCES

4.500
5.000
5.250
5.500
6.000
6.750
7.000
7.500
8.000
9.000
10.000
10.500
11.000
12.000
14.000
15.000
16.000
18.000
20.000

21
24
27
30

2.000* 1.000
2.000
2.333 1.000
1.125
1.000
2.500 1.125
1.1875
1.250
1.000
2.667 1.125
1.1875
1.250
1.000
3.000 1.125
1.1875
1.250
1.000
3.333 1.125
1.1875
1.250
3.500 1.000
4.000
4.500 1.125
5.000

With Keyway
and Setscrew†
Catalog
Item
Number
Code

CAST IRON
NH36
10376


NH40
10378


B
NH42
10380


NH44
10382


NH48
10384


1.00
C
NH54
10386


NH56
10388


NH60
10390


NH64
10392


NH72
10394


NH80
10396


NH84
10398


D
NH88
10400


NH96
10402


1.12
NH112 10404


NH120 10406


NH128 10408


NH144 10410


1.25
NH160B 10412


Face = 1.500"
Outside Dia. = Pitch Dia + .333"
Overall Length = 1.500" + Hub Proj.
STEEL

1.46

.88

1.79

.88

1.96

.88

2.13

.88

2.46

.88

2.79

.88

2.96
3.00
3.50
4.00

.88
.88

A

NJ11B
NJ12B
NJ14B

NJ15B



NJ16B



NJ18B



NJ20



NJ21B
NJ24A
NJ27A
NJ30A

09830
09832
09834

09836



09838



09840



09842



09844
10414
10416
10418

NJ11B-1
NJ12B-1
NJ14B-1
NJ14B-1-1/8
NJ15B-1
NJ15B-1-1/8
NJ15B-1-3/16
NJ15B-1-1/4
NJ16B-1
NJ16B-1-1/8
NJ16B-1-3/16
NJ16B-1-1/4
NJ18B-1
NJ18B-1-1/8
NJ18B-1-3/16
NJ18B-1-1/4
NJ20-1
NJ20-1-1/8
NJ20-1-3/16
NJ20-1-1/4





46108
46109
46110
46111
46112
46113
46114
46115
46116
46117
46118
46119
46120
46121
46122
46123
46124
46125
46126
46127





(continued next page)

*Special Pitch Diameter, used for calculating Center
Distance only, not Ratio.

†All gears have standard keyway, at 90° to setscrew.
See Page 150.

Gear Catalog

13
®

SPUR GEARS
141/2° PRESSURE ANGLE

6 AND 5 DIAMETRAL PITCH
STEEL AND CAST IRON

(Will not operate with 20° spurs)
ALL DIMENSIONS IN INCHES
ORDER BY CATALOG NUMBER OR ITEM CODE

No.
of
Teeth

Hub
Pitch
Dia.

Bore

Dia.

Proj.

Style
See
Page
150

Without Keyway
or Setscrew
Catalog
Item
Number
Code

Face = 1.500˝
Outside Dia. = Pitch Dia + .333˝
Overall Length = 1.500˝ + Hub Proj.

6

DIAMETRAL PITCH
CAST IRON

FACE

PITCH
DIA.

32
33
36
40
42
48
54
60
64
66
72
84
96
108
120
144

HUB
PROJ.

HUB
DIA.

BORE

5.333
5.500
6.000
6.667
7.000
8.000
9.000
10.000
10.667
11.000
12.000
14.000
16.000
18.000
20.000
24.000

B
1.125

2.50

1.00

C

1.25

D

3.00
1.250
3.25
3.50
3.75

1.50

STANDARD TOLERANCES
DIMENSION
BORE
All

D.P.
66D.P.

TOLERANCE
±.0005

D.P.
55D.P.

11
12
14
15
16
18
20

2.400*
2.400
2.800
3.000
3.200
3.600
4.000

24
25
30
35
40
45
50
55
60
70
80
100

4.800
5.000
6.000
7.000
8.000
9.000
10.000
11.000
12.000
14.000
16.000
20.000

1.0625

STEEL
1.78
1.78
2.18
2.38
.88
2.58
2.98
3.38
CAST IRON

1.0625

3.00

1.25

1.1875

3.00

1.25

1.1875

3.50

1.25

1.3125

3.75

1.50

A

A
B

D

*Special Pitch Diameter, used for calculating Center Distance only, not Ratio.

REFERENCE PAGES
Alterations — 149
Horsepower Ratings — 44
Lubrication — 149
Materials — 150
Selection Procedure — 37

14

Gear Catalog
®

10420
10422
10424
10426
10428
10430
10432
10434
10436
10438
10440
10442
10444
10446
10448
10452

Face = 1.750"
Outside Dia. = Pitch Dia. + .400"
Overall Length = 1.750" + Hub Proj.

5

DIAMETRAL PITCH
OVERALL
LENGTH

NJ32
NJ33
NJ36
NJ40
NJ42
NJ48
NJ54
NJ60
NJ64
NJ66
NJ72
NJ84
NJ96
NJ108
NJ120B
NJ144B

NK11B
NK12B
NK14B
NK15B
NK16B
NK18B
NK20B

09846
09848
09850
09852
09854
09856
09858

NK24B
NK25B
NK30B
NK35B
NK40B
NK45B
NK50B
NK55B
NK60B
NK70B
NK80B
NK100B

10454
10456
10458
10460
10462
10464
10466
10468
10470
10472
10474
10478

SPUR GEARS
141/2° PRESSURE ANGLE

4 AND 3 DIAMETRAL PITCH
STEEL AND CAST IRON

(Will not operate with 20° spurs)
ALL DIMENSIONS IN INCHES
ORDER BY CATALOG NUMBER OR ITEM CODE

No.
of
Teeth

Hub
Pitch
Dia.

Bore

Dia.

Proj.

DIAMETRAL PITCH

FACE

PITCH
DIA.

HUB
PROJ.

HUB
DIA.

BORE

OVERALL
LENGTH

STANDARD TOLERANCES
DIMENSION
BORE
All

4 D.P.
D.P.

TOLERANCE
±.0005

D.P.
33D.P.

REFERENCE PAGES
Alterations — 149
Horsepower Ratings — 44, 45
Lubrication — 149
Materials — 150
Selection Procedure — 37

3.000*
3.000
3.500
3.750
4.000
4.500
5.000
5.500

24
28
30
32
36
40
42
44
48
54
56
60
64
72
80
84
88
96

6.000
7.000
7.500
8.000
9.000
10.000
10.500
11.000
12.000
13.500
14.000
15.000
16.000
18.000
20.000
21.000
22.000
24.000

Without Keyway
or Setscrew
Catalog
Item
Number
Code

Face = 2.000"
Outside Dia. = Pitch Dia. + .500"
Overall Length = 2.000" + Hub Proj.

4

11
12
14
15
16
18
20
22

Style
See
Page
150

1.125

STEEL
2.27
2.27
2.77
3.02
.88
3.27
3.77
4.27
4.77
CAST IRON

1.125

09860
09862
09864
09866
09868
09870
09872
09874

A

3.50

1.250
4.00

1.375

A

NL11B
NL12B
NL14B
NL15B
NL16B
NL18B
NL20B
NL22B

4.50

3

DIAMETRAL PITCH

NL24B
10484
NL28B
10486
NL30
10488
B
NL32B
10490
NL36B
10492
NL40B
10494
C
NL42
10496
1.50
NL44B
10498
NL48B
10500
NL54
10502
NL56B
10504
NL60
10506
D
NL64B
10508
NL72B
10510
NL80B
10512
1.50
NL84
10514
NL88B
10516
1.75
NL96B
10518
Face = 3.000"†
Outside Dia. = Pitch Dia. + .667"
Overall Length = Face + Hub Proj.

STEEL
11
12
14
15
16
18
20
21

4.000*
4.000
4.667
5.000
5.333
6.000
6.667
7.000

24
30
36
42
48
54
60
72
84
96
108

8.000
10.000
12.000
14.000
16.000
18.000
20.000
24.000
28.000
32.000
36.000

1.3125





A

CAST IRON
4.50
1.25
1.4375

5.25

1.75

1.5625

5.25

1.75

1.6875

5.50
5.75

1.75

1.9375

5.75

1.75

B
C

D

NO11B†
NO12B†
NO14B
NO15B
NO16B
NO18B
NO20
NO21B

09876
09878
09880
09882
09884
09886
09888
09890

NO24B
NO30B
NO36B
NO42
NO48B
NO54
NO60B
NO72B
NO84B
NO96B
NO108B

10524
10526
10528
10530
10532
10534
10536
10538
10540
10542
10544

*Special Pitch Diameter, used for calculating Center Distance only, not Ratio.
†NO11B and NO12B have 4" Face.

Gear Catalog

15
®

CHANGE GEARS
141/2° PRESSURE ANGLE

20 DI AM ETRA L PITCH
S T E E L A N D CA ST I R O N

(Will not operate with 20° spurs)
ALL DIMENSIONS IN INCHES
ORDER BY CATALOG NUMBER OR ITEM CODE

No.
of
Teeth

Pitch
Dia.

Hub
Dia.

Catalog
Number

Item
Code

No.
of
Teeth

20

DIAMETRAL PITCH

.375 FACE

PITCH
DIA.

1

1

(2) 8 × 16 KEYWAYS
180° APART

HUB
DIA.

.625 BORE

REFERENCE PAGES

20 D.P.
D.P.
20

Alterations — 149
Horsepower Ratings — 39
Lubrication — 149
Materials — 150
Selection Procedure — 37

COMPOUND
S T E E L B U S H IN G S
These steel bushings have 2 keys, 180°
apart and fit bores of GA series change
gears with a slip fit. They are used to
mount two gears on one shaft (or stud)
and drive one from the other.
.4370
.4380
.125

.737
.733

.625

.750

O R D ER BY C A T A L O G N U M BE R
OR ITE M C ODE

16

CATALOG NO.

ITEM CODE

GAB20A

18500

Gear Catalog
®

20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70

STEEL
1.000
GA20
1.050
GA21
1.100
GA22
1.150
GA23
1.200
GA24
1.250
GA25
1.300
GA26
1.350
GA27
1.400
GA28
1.450
GA29
1.500
GA30
1.550
GA31
1.600
GA32
1.650
GA33
1.700

GA34
1.750
GA35
1.800
GA36
1.850
GA37
1.900
GA38
1.950
GA39
2.000
GA40
2.050
GA41
2.100
GA42
2.150
GA43
2.200
GA44
2.250
GA45
2.300
GA46
2.350
GA47
2.400
GA48
2.450
GA49
2.500
GA50
CAST IRON
2.550
GA51B
2.600
GA52B
2.650
GA53B
2.700
GA54B
2.750
GA55B
2.800
GA56B
2.850
GA57B
2.900 1.38 GA58B
2.950
GA59B
3.000
GA60B
3.050
GA61B
3.100
GA62B
3.150
GA63B
3.200
GA64B
3.250
GA65B
3.300
GA66B
3.350 1.56 GA67B
3.400
GA68B
3.450
GA69B
3.500
GA70B

Pitch
Dia.

Hub
Dia.

Catalog
Number

Item
Code

Outside Dia. = Pitch Dia. +.100"

10038
10040
10042
10044
10046
10048
10050
10052
10054
10056
10058
10060
10062
10064
10066
10068
10070
10072
10074
10076
10078
10080
10082
10084
10086
10088
10090
10092
10094
10096
10098
10802
10804
10806
10808
10810
10812
10814
10816
10818
10820
10822
10824
10826
10828
10830
10832
10834
10836
10838
10840

71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120

CAST IRON
3.550
GA71B
3.600
GA72B
3.650
GA73B
3.700
GA74B
3.750 1.56 GA75B
3.800
GA76B
3.850
GA77B
3.900
GA78B
3.950
GA79B
4.000
GA80B
4.050
GA81B
4.100
GA82B
4.150
GA83B
4.200
GA84B
4.250
GA85B
4.300
GA86B
4.350
GA87B
4.400
GA88B
4.450
GA89B
4.500
GA90B
4.550
GA91B
4.600
GA92B
4.650
GA93B
4.700
GA94B
4.750
GA95B
4.800
GA96B
4.850
GA97B
4.900 1.69 GA98B
4.950
GA99B
5.000
GA100B
5.050
GA101B
5.100
GA102B
5.150
GA103B
5.200
GA104B
5.250
GA105B
5.300
GA106B
5.350
GA107B
5.400
GA108B
5.450
GA109B
5.500
GA110B
5.550
GA111B
5.600
GA112B
5.650
GA113B
5.700
GA114B
5.750
GA115B
5.800
GA116B
5.850
GA117B
5.900
GA118B
5.950
GA119B
6.000
GA120B
Style
See
Page
150

10842
10844
10846
10848
10850
10852
10854
10856
10858
10860
10862
10864
10866
10868
10870
10872
10874
10876
10878
10880
10882
10884
10886
10888
10890
10892
10894
10896
10898
10900
10902
10904
10906
10908
10910
10912
10914
10916
10918
10920
10922
10924
10926
10928
10930
10932
10934
10936
10938
10940

20 – 78 Teeth – A
79 – 120 Teeth – C

CHANGE GEARS
141/2° PRESSURE ANGLE

16 DIAMETRAL PITCH
STEEL AND CAST IRON

(Will not operate with 20° spurs)
ALL DIMENSIONS IN INCHES
ORDER BY CATALOG NUMBER OR ITEM CODE

No.
of
Teeth

Pitch
Dia.

Hub
Dia.

Catalog
Number

Item
Code

No.
of
Teeth

16

DIAMETRAL PITCH

3
3
(2)
×
KEYWAYS
16 32
180° APART

.500 FACE

PITCH
DIA.

HUB
DIA.

.750 BORE

R E F E R EN CE P AG E S

16 D.P.
D.P.

Alterations — 149
Horsepower Ratings — 40
Lubrication — 149
Materials — 150
Selection Procedure — 37

COMPOUND
S T E E L B U S H IN G S
These steel bushings have 2 keys, 180°
apart and fit bores of GB series change
gears with a slip fit. They are used to
mount two gears on one shaft (or stud)
and drive one from the other.
.4995
.5005
.188

.914
.910

.750

1.000

STEEL
1.250
GB20
1.313
GB21
1.375
GB22
1.438
GB23
1.500
GB24
1.563
GB25
1.625
GB26
1.688
GB27
1.750
GB28
1.813
GB29
1.875

GB30
1.938
GB31
2.000
GB32
2.063
GB33
2.125
GB34
2.188
GB35
2.250
GB36
2.313
GB37
2.375
GB38
2.438
GB39
2.500
GB40
CAST IRON

10100
10102
10104
10106
10108
10110
10112
10114
10116
10118
10120
10122
10124
10126
10128
10130
10132
10134
10136
10138
10140

41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75

2.563
2.625
2.688
2.750
2.913
2.875
2.938
3.000
3.063
3.125
3.188
3.250
3.313
3.375
3.438
3.500
3.563
3.625
3.688
3.750
3.813
3.875
3.938
4.000
4.063
4.125
4.188
4.250
4.313
4.375
4.438
4.500
4.563
4.625
4.688

10942
10944
10946
10948
10950
10952
10954
10956
10958
10960
10962
10964
10966
10968
10970
10972
10974
10976
10978
10980
10982
10984
10986
10988
10990
10992
10994
10996
10998
11000
11002
11004
11006
11008
11010

1.81

Hub
Dia.

Catalog
Number

Item
Code

Outside Dia. = Pitch Dia. +.125"

20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40

1.56

Pitch
Dia.

GB41B
GB42B
GB43B
GB44B
GB45B
GB46B
GB47B
GB48B
GB49B
GB50B
GB51B
GB52B
GB53B
GB54B
GB55B
GB56B
GB57B
GB58B
GB59B
GB60B
GB61B
GB62B
GB63B
GB64B
GB65B
GB66B
GB67B
GB68B
GB69B
GB70B
GB71B
GB72B
GB73B
GB74B
GB75B

76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128

CAST IRON
4.750
GB76B
4.813
GB77B
4.875
GB78B
4.938
GB79B
5.000
GB80B
5.063
GB81B
5.125
GB82A
5.188
GB83A
5.250
GB84A
5.313
GB85A
5.375
GB86A
5.438
GB87A
5.500
GB88A
5.563
GB89A
5.625
GB90A
5.688
GB91A
5.750
GB92A
5.813
GB93A
5.875
GB94A
5.938
GB95A
6.000
GB96A
6.063
GB97A
6.125
GB98A
6.188
GB99A
6.250
GB100A
6.313 1.81 GB101A
6.375
GB102A
6.438
GB103A
6.500
GB104A
6.563
GB105A
6.625
GB106A
6.688
GB107A
6.750
GB108A
6.913
GB109A
6.975
GB110A
6.938
GB111A
7.000
GB112A
7.063
GB113A
7.125
GB114A
7.188
GB115A
7.250
GB116A
7.313
GB117A
7.375
GB118A
7.438
GB119A
7.500
GB120A
7.563
GB121A
7.625
GB122A
7.688
GB123A
7.750
GB124A
7.813
GB125A
7.875
GB126A
7.938
GB127A
8.000
GB128A
Style
See
Page
150

11012
11014
11016
11018
11020
11022
11024
11026
11028
11030
11032
11034
11036
11038
11040
11042
11044
11046
11048
11050
11052
11054
11056
11058
11060
11062
11064
11066
11068
11070
11072
11074
11076
11078
11080
11082
11084
11086
11088
11090
11092
11094
11096
11098
11100
11102
11104
11106
11108
11110
11112
11114
11116

20 – 79 Teeth – A
80 – 128 Teeth – C

O R D ER BY C A T A L O G N U M BE R
OR ITE M C ODE
CATALOG NO.

ITEM CODE

GBB16A

18502

Gear Catalog

17
®

CHANGE GEARS
141/2° PRESSURE ANGLE

12 DIAMETRAL PITCH
STEEL AND CAST IRON

(Will not operate with 20° spurs)
ALL DIMENSIONS IN INCHES
ORDER BY CATALOG NUMBER OR ITEM CODE

No.
of
Teeth

Pitch
Dia.

Hub
Dia.

Catalog
Number

Item
Code

No.
of
Teeth

12

DIAMETRAL PITCH

1 1
(2) – × – KEYWAYS
4 8
180° APART

.750 FACE

PITCH
DIA.

HUB
DIA.

1.000 BORE

REFERENCE PAGES

12
12 D.P.
D.P.

Alterations — 149
Horsepower Ratings — 41
Lubrication — 149
Materials — 150
Selection Procedure — 37

COMPOUND
STEEL BUSHINGS
These steel bushings have 2 keys, 180°
apart and fit bores of GD series change
gears with a slip fit. They are used to
mount two gears on one shaft (or stud)
and drive one from the other.
.7495
.7505
.250

1.217
1.213

1.000

1.50

ORDER BY CATALOG NUMBER
OR ITEM CODE

18

CATALOG NO.

ITEM CODE

GDB12A

18504

Gear Catalog
®

20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74

STEEL
1.667
GD20
1.750
GD21
1.833
GD22
1.917
GD23
2.000
GD24
2.083
GD25
2.167
GD26
2.250
GD27
2.333

GD28
2.417
GD29
2.500
GD30
2.583
GD31
2.667
GD32
2.750
GD33
2.833
GD34
2.971
GD35
3.000
GD36
CAST IRON
3.083
GD37A
3.167
GD38A
3.250
GD39A
3.333
GD40A
3.417
GD41A
3.500 1.76 GD42A
3.583
GD43A
3.667
GD44A
3.750
GD45A
3.833
GD46A
3.917
GD47A
4.000
GD48A
4.083
GD49A
4.167
GD50A
4.250
GD51A
4.333
GD52A
4.417
GD53A
4.500
GD54A
4.583
GD55A
4.667
GD56A
4.750
GD57A
4.833
GD58A
4.917
GD59A
5.000
GD60A
5.083 2.19 GD61A
5.167
GD62A
5.250
GD63A
5.333
GD64A
5.417
GD65A
5.500
GD66A
5.583
GD67A
5.667
GD68A
5.750
GD69A
5.833
GD70A
5.917
GD71A
6.000
GD72A
6.083
GD73A
6.167
GD74A

Pitch
Dia.

Hub
Dia.

Catalog
Number

Item
Code

Outside Dia. = Pitch Dia. +.167"

10142
10144
10146
10148
10150
10152
10154
10156
10158
10160
10162
10164
10166
10168
10170
10172
10174
11118
11120
11122
11124
11126
11128
11130
11132
11134
11136
11138
11140
11142
11144
11146
11148
11150
11152
11154
11156
11158
11160
11162
11164
11166
11168
11170
11172
11174
11176
11178
11180
11182
11184
11186
11188
11190
11192

75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120

CAST IRON
6.250
GD75A
6.333
GD76A
6.417
GD77A
6.500
GD78A
6.583 2.19 GD79A
6.667
GD80A
6.750
GD81A
6.833
GD82A
6.917
GD83A
7.000
GD84A
7.083
GD85A
7.167
GD86A
7.250
GD87A
7.333
GD88A
7.417
GD89A
7.500
GD90A
7.583
GD91A
7.667
GD92A
7.750
GD93A
7.833
GD94A
7.917
GD95A
8.000
GD96A
8.083
GD97A
8.167
GD98A
8.250
GD99A
8.333 2.44 GD100A
8.417
GD101A
8.500
GD102A
8.583
GD103A
8.667
GD104A
8.750
GD105A
8.833
GD106A
8.917
GD107A
9.000
GD108A
9.083
GD109A
9.167
GD110A
9.250
GD111A
9.333
GD112A
9.417
GD113A
9.500
GD114A
9.583
GD115A
9.667
GD116A
9.750
GD117A
9.833
GD118A
9.917
GD119A
10.000
GD120A

Style
See
Page
150

11194
11196
11198
11200
11202
11204
11206
11208
11210
11212
11214
11216
11218
11220
11222
11224
11226
11228
11230
11232
11234
11236
11238
11240
11242
11244
11246
11248
11250
11252
11254
11256
11258
11260
11262
11264
11266
11268
11270
11272
11274
11276
11278
11280
11282
11284

20 – 60 Teeth – A
61 – 120 Teeth – C

CHANGE GEARS
141/2° PRESSURE ANGLE

10 DIAMETRAL PITCH
STEEL AND CAST IRON

(Will not operate with 20° spurs)
ALL DIMENSIONS IN INCHES
ORDER BY CATALOG NUMBER OR ITEM CODE

No.
of
Teeth

Pitch
Dia.

Hub
Dia.

Catalog
Number

Item
Code

No.
of
Teeth

10

DIAMETRAL PITCH

5
5
×
KEYWAYS
16 32
180° APART

1.000" FACE

PITCH
DIA.

(2)

HUB
DIA.

1.250 BORE

REFERENCE PAGES
10 D.P.
10
D.P.

Alterations — 149
Horsepower Ratings — 42
Lubrication — 149
Materials — 150
Selection Procedure — 37

COMPOUND
STEEL BUSHINGS
These steel bushings have 2 keys, 180°
apart and fit bores of GF series change
gears with a slip fit. They are used to
mount two gears on one shaft (or stud)
and drive one from the other.
.9995
1.0005

20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60

STEEL
2.000
GF20
2.100
GF21
2.200
GF22
2.300
GF23
2.400
GF24
2.500

GF25
2.600
GF26
2.700
GF27
2.800
GF28
2.900
GF29
3.000
GF30
CAST IRON
3.100
GF31B
3.200
GF32B
3.300
GF33B
3.400
GF34B
3.500
GF35B
3.600 1.94 GF36B
3.700
GF37B
3.800
GF38B
3.900
GF39B
4.000
GF40B
4.100
GF41B
4.200
GF42B
4.300
GF43B
4.400
GF44B
4.500
GF45B
4.600
GF46B
4.700
GF47B
4.800 2.68 GF48B
4.900
GF49B
5.000
GF50B
5.100
GF51B
5.200
GF52A
5.300
GF53A
5.400
GF54A
5.500
GF55A
5.600
GF56A
5.700 3.12 GF57A
5.800
GF58A
5.900
GF59A
6.000
GF60A

Pitch
Dia.

Hub
Dia.

Catalog
Number

Item
Code

Outside Dia. = Pitch Dia. +.200"

10176
10178
10180
10182
10184
10186
10188
10190
10192
10194
10196
11286
11288
11290
11292
11294
11296
11298
11300
11302
11304
11306
11308
11310
11312
11314
11316
11318
11320
11322
11324
11326
11328
11330
11332
11334
11336
11338
11340
11342
11344

61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100

CAST IRON
6.100
GF61A
6.200
GF62A
6.300
GF63A
6.400
GF64A
6.500
GF65A
6.600
GF66A
6.700
GF67A
6.800
GF68A
6.900
GF69A
7.000
GF70A
7.100
GF71A
7.200
GF72A
7.300
GF73A
7.400
GF74A
7.500
GF75A
7.600
GF76A
7.700
GF77A
7.800
GF78A
7.900
GF79A
8.000
GF80A
8.100 3.12 GF81A
8.200
GF82A
8.300
GF83A
8.400
GF84A
8.500
GF85A
8.600
GF86A
8.700
GF87A
8.800
GF88A
8.900
GF89A
9.000
GF90A
9.100
GF91A
9.200
GF92A
9.300
GF93A
9.400
GF94A
9.500
GF95A
9.600
GF96A
9.700
GF97A
9.800
GF98A
9.900
GF99A
10.000
GF100A
Style
See
Page
150

11346
11348
11350
11352
11354
11356
11358
11360
11362
11364
11366
11368
11370
11372
11374
11376
11378
11380
11382
11384
11386
11388
11390
11392
11394
11396
11398
11400
11402
11404
11406
11408
11410
11412
11414
11416
11418
11420
11422
11424

20 – 60 Teeth – A
61 – 66 Teeth – B
67 – 100 Teeth – C

.313

1.523
1.519

1.250

2.000

ORDER BY CATALOG NUMBER
OR ITEM CODE
CATALOG NO.

ITEM CODE

GFB10A

18506

Gear Catalog

19
®

CHANGE GEARS
141/2° PRESSURE ANGLE

8 DIAMETRAL PITCH
STEEL AND CAST IRON

(Will not operate with 20° spurs)
ALL DIMENSIONS IN INCHES
ORDER BY CATALOG NUMBER OR ITEM CODE

No.
of
Teeth

Pitch
Dia.

Hub
Dia.

Catalog
Number

Item
Code

No.
of
Teeth

8

DIAMETRAL PITCH

20
21
22
23
24

3 3
(2) 8 × 16 KEYWAYS
180° APART

1.250 FACE

PITCH
DIA. HUB
DIA.

1.375 BORE

REFERENCE PAGES

88 D.P.
D.P.

Alterations — 149
Horsepower Ratings — 43
Lubrication — 149
Materials — 150
Selection Procedure — 37

COMPOUND
STEEL BUSHINGS
These steel bushings have 2 keys, 180°
apart and fit bores of GH series change
gears with a slip fit. They are used to
mount two gears on one shaft (or stud)
and drive one from the other.
1.1245
1.1255
.375

1.698
1.694

1.375

2.50

ORDER BY CATALOG NUMBER
OR ITEM CODE

20

CATALOG NO.

ITEM CODE

GHB8A

18508

Gear Catalog
®

25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60

STEEL
2.500

GH20
2.625

GH21
2.750

GH22
2.875

GH23
3.000

GH24
CAST IRON
3.125
GH25B
3.250
GH26B
3.375
GH27B
3.500
GH28B
3.625
GH29B
3.750 2.06 GH30B
3.875
GH31B
4.000
GH32B
4.125
GH33B
4.250
GH34B
4.375
GH35B
4.500
GH36B
4.625
GH37B
4.750
GH38B
4.875
GH39B
5.000
GH40B
5.125 2.69 GH41A
5.250
GH42A
5.375
GH43A
5.500
GH44A
5.625
GH45A
5.750
GH46A
5.875
GH47A
6.000
GH48A
6.125
GH49A
6.250
GH50A
6.375
GH51A
6.500 3.12 GH52A
6.625
GH53A
6.750
GH54A
6.875
GH55A
7.000
GH56A
7.125
GH57A
7.250
GH58A
7.375 3.25 GH59A
7.500
GH60A

Pitch
Dia.

Hub
Dia.

Catalog
Number

Item
Code

Outside Dia. = Pitch Dia. +.250"

10198
10200
10202
10204
10206
11426
11428
11430
11432
11434
11436
11438
11440
11442
11444
11446
11448
11450
11452
11454
11456
11458
11460
11462
11464
11466
11468
11470
11472
11474
11476
11478
11480
11482
11484
11486
11488
11490
11492
11494
11496

61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100

CAST IRON
7.625
GH61A
7.750
GH62A
7.875
GH63A
8.000
GH64A
8.125
GH65A
8.250
GH66A
8.375
GH67A
8.500
GH68A
8.625
GH69A
8.750 3.25 GH70A
8.875
GH71A
9.000
GH72A
9.125
GH73A
9.250
GH74A
9.375
GH75A
9.500
GH76A
9.625
GH77A
9.750
GH78A
9.875
GH79A
10.000
GH80A
10.125
GH81A
10.250
GH82A
10.375
GH83A
10.500
GH84A
10.625
GH85A
10.750
GH86A
10.875
GH87A
11.000
GH88A
11.125 3.75 GH89A
11.250
GH90A
11.375
GH91A
11.500
GH92A
11.625
GH93A
11.750
GH94A
11.875
GH95A
12.000
GH96A
12.125
GH97A
12.250
GH98A
12.375
GH99A
12.500
GH100A

Style
See
Page
150

11498
11500
11502
11504
11506
11508
11510
11512
11514
11516
11518
11520
11522
11524
11526
11528
11530
11532
11534
11536
11538
11540
11542
11544
11546
11548
11550
11552
11554
11556
11558
11560
11562
11564
11566
11568
11570
11572
11574
11576

20 – 49 Teeth – A
50 – 57 Teeth – B
58 – 68 Teeth – C
69 – 100 Teeth – D

STEM PINIONS
141/2° PRESSURE ANGLE

20 THROUGH 6 DIAMETRAL PITCH
STEEL

(Will not operate with 20° spurs)
Boston Gear Stem Pinions feature small numbers of teeth cut integral on a steel
shaft. Undercutting of the teeth is minimized by the use of special enlarged Pitch
Diameters. When run with standard stock spur gears, they provide high ratios
not normally found in spur gear drives. They are not intended to be operated
with each other, with internal gears or with 11 tooth pinions, but will run satisfactorily with all other standard 141⁄2° Pressure Angle spur gears.

ALL DIMENSIONS IN INCHES
ORDER BY CATALOG NUMBER OR ITEM CODE

No.
of
Teeth

Pitch
Dia.*

Stem
Dia.

Stem
Length

Overall
Length

Catalog
Number

.375
.375
.500
.625

2.875
2.875
3.375
3.375

4.500
4.500
5.000
5.000

NAR5
NAR6
NAR8
NAR10

.4375
.500
.625
.750

3.125
3.125
3.375
3.375

5.000
5.000
5.250
5.250

.625
.625
.750
.875
1.000

4.375
4.375
4.375
4.375
4.375

7.250
7.250
7.250
7.250
7.250

.750
.750
.875
1.000
1.125

4.375
4.375
4.375
4.375
4.375

7.500
7.500
7.500
7.500
7.500

.875
1.000
1.125
1.125
1.500

4.375
4.375
4.375
4.375
4.375

7.750
7.750
7.750
7.750
7.750

20

DIAMETRAL PITCH
PITCH
DIA
(SPL)

OVERALL LENGTH
FACE

5
6
8
10

STEM LENGTH

STEM
DIA

STANDARD TOLERANCES
DIMENSION
STEM DIA.
All

TOLERANCE
+.0000 – .0015

.287
.335
.430
.525

FACE = 1.125"

16

DIAMETRAL PITCH
5
6
8
10

.359
.419
.537
.656

DIAMETRAL PITCH
.479
.558
.637
.716
.875

DIAMETRAL PITCH
.575
.670
.765
.860
1.050

DIAMETRAL PITCH
.718
.837
.956
1.075
1.312

DIAMETRAL PITCH
.958
1.116
1.433
1.750

NDR5
NDR6
NDR7
NDR8
NDR10

09734
09736
09738
09740
09742

NFR5
NFR6
NFR7
NFR8
NFR10

09768
09770
09772
09774
09776

FACE = 2.500"

6

5
6
8
10

09696
09698
09700
09702

FACE = 2.250"

8

5
6
7
8
10

NBR5
NBR6
NBR8
NBR10

FACE = 2.000"

10

5
6
7
8
10

09654
09656
09658
09660

FACE = 1.375"

12

5
6
7
8
10

Item
Code

NHR5
NHR6
NHR7
NHR8
NHR10

09796
09798
09800
09802
09804

FACE = 3.000"
1.250
1.375
1.625
2.000

4.375
4.375
5.000
5.375

8.500
8.500
9.000
9.500

NJR5
NJR6
NJR8
NJR10

09822
09824
09826
09828

*Used for calculating Center Distance, not ratio.

Gear Catalog

21
®

DRAWN PINION WIRE
141/2° PRESSURE ANGLE

48, 32 AND 24 DIAMETRAL PITCH
BRASS AND STEEL

(Will not operate with 20° spurs)
ORDER BY CATALOG NUMBER
OR ITEM CODE

No. of
Teeth

Pitch
Dia.

Catalog
Number

Item
Code

48

DIAMETRAL PITCH

Drawn Pinion Wire, teeth not generated.
All Pinion Wire is stocked in 4 foot
pieces. Other lengths can be furnished
on special order. Price on application.

6
8
9
10
12
14
15
16
18

.125
.167
.188
.208
.250
.292
.312
.333
.375

6
8
9
10
12
14
15
16
18

.125
.167
.188
.208
.250
.292
.312
.333
.375

BRASS
G24
G25
G26
G27
G29
G30
G31
G32
G33
STEEL
GS24
GS25
GS26
GS27
GS29
GS30
GS31
GS32
GS33

36900
36902
36904
36906
36908
36910
36912
36914
36916
36954
36956
36958
36960
36962
36964
36966
36968
36970

32

DIAMETRAL PITCH
6
8
9
10
11
12
14
15
16

.188
.250
.281
.312
.344
.375
.438
.469
.500

6
8
9
10
11
12
14
15
16

.188
.250
.281
.312
.344
.375
.438
.469
.500

BRASS
G39
G40
G41
G42
G43
G44
G45
G46
G47
STEEL
GS39
GS40
GS41
GS42
GS43
GS44
GS45
GS46
GS47

36918
36920
36922
36924
36926
36928
36930
36932
36934
36972
36974
36976
36978
36980
36982
36984
36986
36988

24

DIAMETRAL PITCH

22

Gear Catalog
®

6
9
10
12
14
15
16

.250
.375
.417
.500
.583
.625
.667

6
8
9
10
11
12
14
15
16

.250
.333
.375
.417
.458
.500
.583
.625
.667

BRASS
G54
G56
G57
G59
G60
G61
G62
STEEL
GS54
GS55
GS56
GS57
GS58
GS59
GS60
GS61
GS62

36936
36940
36942
36946
36948
36950
36952
36990
36992
36994
36996
36998
37000
37002
37004
37006

RACK
141/2° PRESSURE ANGLE

48 THROUGH 3 DIAMETRAL PITCH
NYLON AND STEEL

(Will not operate with 20° spurs)
ALL DIMENSIONS IN INCHES
ORDER BY CATALOG NUMBER OR ITEM CODE

Pitch Nom- Mating
Nylon
Steel
Overall Line
inal
Spur
Thick- to Back Length Gear Catalog Item Catalog Item
ness
(B)
(Feet) Page # Number Code Number Code
48 DIAMETRAL PITCH
FACE WIDTH = .125"
1
2
32 DIAMETRAL PITCH
.125

1
2
7,8
4
20 DIAMETRAL PITCH

GP579-1 53901




L505-2 12732


L505-4 12734
FACE WIDTH = .375"

OVERALL
THICKNESS

STANDARD TOLERANCES ‡
DIMENSION
LENGTH†
FACE
WIDTH

All
1/8 – 3/4
1 – 1-1/2
1-3/4 – 2
3

+ 1.00 – .000
+ .000 – .002
+ .000 – .003
+ .000 – .004
+ .000 – .006

†Ends not machined. Tolerance allows for cutting and
matching. Nylon Rack is molded in proper lengths to
permit end to end butting without interruption of tooth
spacing.
‡Steel only.


L509-2 12736

L509-4 12738

L509-6 12740
*FACE WIDTH = .313"

2
4
9,10
4
.500
.438
6
12 DIAMETRAL PITCH







L510-2 12742

L510-4 12744

L512-4 12746

L512-6 12748
FACE WIDTH = .750"

4
6
10,11
.750
.667
4
6
10 DIAMETRAL PITCH







L514-4 12750

L514-6 12752

L515-4 12754

L515-6 12756
FACE WIDTH = 1.000"

4
6
11,12
4
1.000
.900
6
8 DIAMETRAL PITCH







L516-4 37324

L516-6 37326

L517-4 37328

L517-6 37330
FACE WIDTH = 1.250"

4
6
12,13
4
1.250 1.125
6
6 DIAMETRAL PITCH







L518-4 37332

L518-6 37334

L519-4 37336

L519-6 37338
FACE WIDTH = 1.500"

4
6
13,14
4
1.500 1.333
6
5 DIAMETRAL PITCH







L520-4 37340

L520-6 37342

L521-4 37344

L521-6 37346
FACE WIDTH = 1.750"

14





L522-4 37348

L522-6 37350
FACE WIDTH = 2.000"

15





L523-4 37352

L523-6 37354
FACE WIDTH = 3.000"

15







.312

.625

.750

1.000
PITCH DIA
OF GEAR
(D)
GEAR
CENTER LINE
TO BACK OF RA
B+D
2

FACE
WIDTH
CK

LENGTH
PITCH LINE
TO BACK
(B)

OVERALL
THICKNESS

4

3

Alterations — 149
Lubrication — 149
Materials — 150

.325

.250

.417

.525

.625

.833

4
6
DIAMETRAL PITCH

1.250

1.050

4
6
DIAMETRAL PITCH

1.500

REFERENCE PAGES

.208





.500

TOLERANCE

.156

2
4
8,9
6
16 DIAMETRAL PITCH
.375

LENGTH

GP586-1 53899




L501-2 12726
FACE WIDTH = .188"
GP583-1 53900




L503-2 12728


L503-4 12730
FACE WIDTH = .250"

.250

WIDTH

6

1
2
6,7
4
24 DIAMETRAL PITCH
.188

PITCH LINE
TO BACK
(B)

.104

1.500

1.250

1.167

4
6

L524-4
L524-6

37356
37358

*Face Width of L512-4 and L512-6 = 1/2".

Gear Catalog

23
®

INTERNAL GEARS
141/2° PRESSURE ANGLE

48 THROUGH 16 DIAMETRAL PITCH
BRASS

(Will not operate with 20° spurs)
ORDER BY CATALOG NUMBER
OR ITEM CODE

No. of
Teeth

Pitch
Dia.

O.D.

I.D.

Catalog
Number

1.500
2.000
2.750
3.750

.986
1.486
1.986
2.986

G632
G633
G635
G637

2.000
2.750
3.750
4.750
6.750

1.480
1.980
2.980
3.980
5.980

G664
G666
G668
G669
G670

2.250
2.750
3.750
4.750
6.750

1.474
1.974
2.974
3.974
5.974

G675
G677
G679
G680
G681

2.750
3.750
4.750
6.750

1.962
2.962
3.962
5.962

G689
G691
G692
G693

Item
Code

48
DIAMETRAL PITCH
48
72
96
144

1.000
1.500
2.000
3.000

FACE = .125"
12066
12068
12070
12072

32
DIAMETRAL PITCH
48
64
96
128
192

FACE

1.500
2.000
3.000
4.000
6.000

FACE = .188"
12056
12058
12060
12062
12064

24
DIAMETRAL PITCH
PITCH
DIA.

OUTSIDE
DIA.

INSIDE
DIA.

36
48
72
96
144

1.500
2.000
3.000
4.000
6.000

FACE = .250"
12046
12048
12050
12052
12054

16
DIAMETRAL PITCH

STANDARD TOLERANCES
DIMENSION
48 Pitch
I.D.
32 Pitch
24 Pitch
16 Pitch
O.D.
All

All
All
All
All

TOLERANCE
+.004 – .000
+.005 – .000
+.006 – .000
+.008 – .000
+.001 + .003

32
48
64
96

2.000
3.000
4.000
6.000

FACE = .313"

PINION
PITCH DIA.
(d)
CENTER DISTANCE
GEAR
PITCH DIA.
(D)

CENTER = D – d
DISTANCE
2

NOTE: The difference in tooth numbers between Gear and Pinion
should not be less than 15.

24

Gear Catalog
®

12038
12040
12042
12044

SPUR GEARS
64 AND 48 DIAMETRAL PITCH
DELRIN AND BRASS

20° PRESSURE ANGLE
(Will not operate with 141⁄2° spurs)
ALL DIMENSIONS IN INCHES
ORDER BY CATALOG NUMBER OR ITEM CODE

No.
of
Teeth

Style
See
Page
150

Hub
Pitch
Dia.

Bore

Dia.

Proj.

Without Keyway
or Setscrew
Catalog
Item
Number
Code

Face = .125"
Outside Dia. = Pitch Dia. + .033"
Overall Length = .125" + Hub Proj.

64

DIAMETRAL PITCH
BRASS

HUB
PROJ.

FACE

PITCH
DIA.

HUB
DIA.

BORE

OVERALL
LENGTH

STANDARD TOLERANCES
DIMENSION
BORE
All

48 D.P.

48
64D.P.
DP

48 D.P.

REFERENCE PAGES
Alterations — 149
Lubrication — 149
Materials — 150

16
18
20
24
28
32
36
40
44
48
52
56
60
64
72
80
88
96
112
128
144
160
192

.250
.281
.312
.375
.438
.500
.562
.625
.688
.750
.812
.875
.938
1.000
1.125
1.250
1.375
1.500
1.750
2.000
2.250
2.500
3.000

.125

.1875

.250

.3125

64 DP

64 D.P.

.19

.25

A

.25

.31

C

Y6416
Y6418
Y6420
Y6424
Y6428
Y6432
Y6436
Y6440
Y6444
Y6448
Y6452
Y6456
Y6460
Y6464
Y6472
Y6480
Y6488
Y6496
Y64112
Y64128
Y64144
Y64160
Y64192

09482
09484
09486
09488
09490
09492
09494
09496
09498
09500
09502
09504
09506
09508
09510
09512
09514
09516
09518
09520
09522
09524
09526

Face = .125"
Outside Dia. = Pitch Dia. + .042"
Overall Length = .125" + Hub Proj.

48
DIAMETRAL PITCH

MOLDED DELRIN

TOLERANCE
±.0005

.19
.22
.25
.28
.34
.38
.44
.44
.50
.50
.56
.56
.62
.62
.69
.69
.75
.75
.81
.88
.75
.75
.88

18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
42

.375
.396
.417
.438
.458
.479
.500
.521
.542
.562
.583
.604
.625
.646
.667
.688
.708
.729
.750
.771
.792
.813
.833
.875

.31
.34
.38
.1562

.41

.25

.45
.48
.50

.1875

.55

A

.25

YP4818
YP4819
YP4820
YP4821
YP4822
YP4823
YP4824
YP4825
YP4826
YP4827
YP4828
YP4829
YP4830
YP4831
YP4832
YP4833
YP4834
YP4835
YP4836
YP4837
YP4838
YP4839
YP4840
YP4842

53902
53903
53904
53905
53906
53907
53908
53909
53910
53911
53912
53913
53914
53915
53916
53917
53918
53919
53920
53921
53922
53923
53924
53925

(continued next page)

Gear Catalog

25
®

SPUR GEARS
48 DIAMETRAL PITCH
DELRIN

20° PRESSURE ANGLE
(Will not operate with 141⁄2° spurs)
ALL DIMENSIONS IN INCHES
ORDER BY CATALOG NUMBER OR ITEM CODE

No.
of
Teeth

Style
See
Page
150

Hub
Pitch
Dia.

Bore

Dia.

Proj.

Without Keyway
or Setscrew †
Catalog
Item
Number
Code

Face = .125"
Outside Dia. = Pitch Dia. + .042"
Overall Length = .125" + Hub Proj.

48

DIAMETRAL PITCH

MOLDED DELRIN

HUB
PROJ.

FACE

PITCH
DIA.

HUB
DIA.

BORE

OVERALL
LENGTH

STANDARD TOLERANCES*
DIMENSION
BORE

TOLERANCE

All

+.001 – .000

*Gears with Brass Inserts only.

48 D.P.

48 D.P.

REFERENCE PAGES
Alterations — 149
Materials — 150
†All YPB gears have setscrews.

BORE

SETSCREW

1/8

#2-56

3/16

#4-40

1/4

#6-32

44
45
48
52
54
56
60
64
66
72
80
84
96
100
108
120

.917
.938
1.000
1.083
1.125
1.168
1.250
1.333
1.375
1.500
1.667
1.750
2.000
2.083
2.250
2.500

18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
42
44
45
48
52
54
56
60
64
66
72
80
84
96
100
108
120

.375
.396
.417
.438
.458
.479
.500
.521
.542
.562
.583
.604
.625
.646
.667
.688
.708
.729
.750
.771
.792
.813
.833
.875
.917
.938
1.000
1.083
1.125
1.168
1.250
1.333
1.375
1.500
1.667
1.750
2.000
2.083
2.250
2.500

YP4844
YP4845
YP4848
YP4852
YP4854
YP4856
YP4860
YP4864
.250
.61
.25
B
YP4866
YP4872
YP4880
YP4884
YP4896
YP48100
YP48108
YP48120
MOLDED DELRIN WITH BRASS INSERTS
.188

.55

.31
.34
.125
.38
.40
.45
.48
.50

A

.188
.55

.250

.25

.61

(continued next page)

26

Gear Catalog
®

B

YPB4818
YPB4819
YPB4820
YPB4821
YPB4822
YPB4823
YPB4824
YPB4825
YPB4826
YPB4827
YPB4828
YPB4829
YPB4830
YPB4831
YPB4832
YPB4833
YPB4834
YPB4835
YPB4836
YPB4837
YPB4838
YPB4839
YPB4840
YPB4842
YPB4844
YPB4845
YPB4848
YPB4852
YPB4854
YPB4856
YPB4860
YPB4864
YPB4866
YPB4872
YPB4880
YPB4884
YPB4896
YPB48100
YPB48108
YPB48120

53926
53927
53928
53929
53930
53931
53932
53933
53934
53935
53936
53937
53938
53939
53940
53941
53942
53943
53944
53945
53946
53947
53948
53949
53950
53951
53952
53953
53954
53955
53956
53957
53958
53959
53960
53961
53962
53963
53964
53965
53966
53967
53968
53969
53970
53971
53972
53973
53974
53975
53976
53977
53978
53979
53980
53981

SPUR GEARS
48 AND 32 DIAMETRAL PITCH
DELRIN AND BRASS

20° PRESSURE ANGLE
(Will not operate with 141⁄2° spurs)
ALL DIMENSIONS IN INCHES
ORDER BY CATALOG NUMBER OR ITEM CODE

No.
of
Teeth

Style
See
Page
150

Hub
Pitch
Dia.

Bore

Dia.

Proj.

Without Keyway
or Setscrew
Catalog
Item
Number
Code

Face = .125"
Outside Dia. = Pitch Dia. + .042"
Overall Length = .125" + Hub Proj.

48

DIAMETRAL PITCH
BRASS

HUB
PROJ.

FACE

PITCH
DIA.

HUB
DIA.

BORE

OVERALL
LENGTH

12
15
18
21
24
27
30
36
42
48
54
60
66
72
84
96
120
144
192

.250
.312
.375
.438
.500
.562
.625
.750
.875
1.000
1.125
1.250
1.375
1.500
1.750
2.000
2.500
3.000
4.000

.125

.1875

.250

.3125

.18
.22
.28
.35
.38
.44
.44
.50
.57
.63
.69
.69
.75
.75
.82
.88
.75
.88
1.00

.19

.25
A

.25

.31

C

Y4812
Y4815
Y4818
Y4821
Y4824
Y4827
Y4830
Y4836
Y4842
Y4848
Y4854
Y4860
Y4866
Y4872
Y4884
Y4896
Y48120
Y48144
Y48192

09444
09446
09448
09450
09452
09454
09456
09458
09460
09462
09464
09466
09468
09470
09472
09474
09476
09478
09480

Face = .188"
Outside Dia. = Pitch Dia. + .062"
Overall Length = .188" + Hub Proj.

32

DIAMETRAL PITCH

MOLDED DELRIN

STANDARD

TOLERANCES*

DIMENSION
BORE
All

TOLERANCE
±.0005˜

*Brass only.

48 D.P.

3248
D.P.D.P.

48 D.P.

REFERENCE PAGES
Alterations — 149
Lubrication — 149
Materials — 150

32 D.P.

32 D.P.

12
14
15
16
18
20
22
24
26
28
30
32
34
36
38
40
42
44
48
52
56
64
72
80
96

.375
.438
.469
.500
.562
.625
.688
.750
.812
.875
.938
1.000
1.062
1.125
1.187
1.250
1.312
1.375
1.500
1.625
1.750
2.000
2.250
2.500
3.000

.1562

.28
.31
.31

.31

.34
.47

A

.50
.1875

.250

.56
.50
.56
.63

.61

.31

.31

.63

B

.67
.3125

.31
.81

YP3212
YP3214
YP3215
YP3216
YP3218
YP3220
YP3222
YP3224
YP3226
YP3228
YP3230
YP3232
YP3234
YP3236
YP3238
YP3240
YP3242
YP3244
YP3248
YP3252
YP3256
YP3264
YP3272
YP3280
YP3296

53982
53983
53984
53985
53986
53987
53988
53989
53990
53991
53992
53993
53994
53995
53996
53997
53998
53999
54000
54001
54002
54003
54004
54005
54006

(continued next page)

Gear Catalog

27
®

SPUR GEARS
32 DIAMETRAL PITCH
DELRIN AND BRASS

20° PRESSURE ANGLE
(Will not operate with 141⁄2° spurs)
ALL DIMENSIONS IN INCHES
ORDER BY CATALOG NUMBER OR ITEM CODE

No.
of
Teeth

Hub
Pitch
Dia.

Bore

Dia.

Proj.

Without Keyway
or Setscrew †
Catalog
Item
Number
Code

Style
See
Page
150

Face = .188"
Outside Dia. = Pitch Dia. + .062"
Overall Length = .188" + Hub Proj.

32

DIAMETRAL PITCH

MOLDED DELRIN with BRASS INSERTS

HUB
PROJ.

FACE

PITCH
DIA.

HUB
DIA.

BORE

OVERALL
LENGTH

STANDARD TOLERANCES
DIMENSION

TOLERANCE
Brass
BORE
All
± .0005
Delrin with Brass Inserts
BORE
All
+ .001 – .000

32 D.P.

32 D.P.

REFERENCE PAGES
Alterations — 149
Lubrication — 149
Materials — 150
†All YPB gears have setscrew and spot drill.

28

BORE

SETSCREW

1/8

#2-56

3/16

#4-40

1/4

#6-32

5/16

#8-32

Gear Catalog
®

12
14
15
16
18
20
22
24
26
28
30
32
34
36
38
40
42
44
48
52
56
64
72
80
96

.375
.438
.469
.500
.562
.625
.688
.750
.812
.875
.938
1.000
1.062
1.125
1.187
1.250
1.312
1.375
1.500
1.625
1.750
2.000
2.250
2.500
3.000

12
14
16
18
20
24
28
32
36
40
48
56
64
72
80
96
112
128
160

.375
.438
.500
.562
.625
.750
.875
1.000
1.125
1.250
1.500
1.750
2.000
2.250
2.500
3.000
3.500
4.000
5.000

.125

.1875

.250

.3125

.125

.1875

.250

.3125

.28
.31
.31
.34
.34
.47
.50
.50
.56
.50
.56
.63
.31
.61
.61
.61
.61
.61
.61
.63
.67
.67
.67
.81
.81
.81
BRASS
.28
.34
.40
.43
.47
.53
.59
.66
.72
.72
.78
.84
.90
.88
.88
1.00
1.00
1.00
1.00

A

B

.25

.25
A
.25

.25

.31

C

YPB3212
YPB3214
YPB3215
YPB3216
YPB3218
YPB3220
YPB3222
YPB3224
YPB3226
YPB3228
YPB3230
YPB3232
YPB3234
YPB3236
YPB3238
YPB3240
YPB3242
YPB3244
YPB3248
YPB3252
YPB3256
YPB3264
YPB3272
YPB3280
YPB3296

54007
54008
54009
54010
54011
54012
54013
54014
54015
54016
54017
54018
54019
54020
54021
54022
54023
54024
54025
54026
54027
54028
54029
54030
54031

Y3212
Y3214
Y3216
Y3218
Y3220
Y3224
Y3228
Y3232
Y3236
Y3240
Y3248
Y3256
Y3264
Y3272
Y3280
Y3296
Y32112
Y32128
Y32160

09406
09408
09410
09412
09414
09416
09418
09420
09422
09424
09426
09428
09430
09432
09434
09436
09438
09440
09442

SPUR GEARS
24 DIAMETRAL PITCH
DELRIN

20° PRESSURE ANGLE
(Will not operate with 141⁄2° spurs)
ALL DIMENSIONS IN INCHES
ORDER BY CATALOG NUMBER OR ITEM CODE

No.
of
Teeth

Style
See
Page
150

Hub
Pitch
Dia.

Bore

Dia.

Proj.

Without Keyway
or Setscrew†
Catalog
Item
Number
Code

Face = .250"
Outside Dia. = Pitch Dia. + .083"
Overall Length = .250" + Hub Proj.

24

DIAMETRAL PITCH

MOLDED DELRIN

HUB
PROJ.

FACE

PITCH
DIA.

HUB
DIA.

BORE

OVERALL
LENGTH

STANDARD TOLERANCES*
DIMENSION
BORE

TOLERANCE

All

+.001 – .000

*Gears with Brass Inserts only.

24 D.P.

24 D.P.

REFERENCE PAGES
Alterations — 149
Materials — 150
†All YPB gears have setscrew and spot drill.

BORE

SETSCREW

3/16

#4-40

1/4

#6-32

5/16

#8-32

12
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
30
32
33
34
36
39
40
42
44
45
48
50
52
54
56
60

.500
.583
.625
.667
.709
.750
.791
.833
.875
.917
.959
1.000
1.041
1.083
1.125
1.167
1.250
1.333
1.375
1.416
1.500
1.625
1.666
1.750
1.833
1.875
2.000
2.083
2.166
2.250
2.333
2.500

12
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
30
32
33
34
36
39
40
42

.500
.583
.625
.667
.709
.750
.791
.833
.875
.917
.959
1.000
1.041
1.083
1.125
1.167
1.250
1.333
1.375
1.416
1.500
1.625
1.666
1.750

.38
.44

YP2412
YP2414
YP2415
.48
YP2416
YP2417
.188
A
YP2418
YP2419
.55
YP2420
YP2421
YP2422
YP2423
.63
YP2424
.61
YP2425
YP2426
YP2427
.63
.250
YP2428
.31
YP2430
YP2432
.61
YP2433
YP2434
.63
YP2436
B
YP2439
YP2440
YP2442
YP2444
YP2445
.313
.67
YP2448
YP2450
YP2452
YP2454
YP2456
YP2460
MOLDED DELRIN WITH BRASS INSERTS
.38
.44
.48
.188

A
.55
.31
.63
.61

.250

.63
B
.61
.63

.313

.67

YPB2412
YPB2414
YPB2415
YPB2416
YPB2417
YPB2418
YPB2419
YPB2420
YPB2421
YPB2422
YPB2423
YPB2424
YPB2425
YPB2426
YPB2427
YPB2428
YPB2430
YPB2432
YPB2433
YPB2434
YPB2436
YPB2439
YPB2440
YPB2442

54032
54033
54034
54035
54036
54037
54038
54039
54040
54041
54042
54043
54044
54045
54046
54047
54048
54049
54050
54051
54052
54053
54054
54055
54056
54057
54058
54059
54060
54061
54062
54063
54064
54065
54066
54067
54068
54069
54070
54071
54072
54073
54074
54075
54076
54077
54078
54079
54080
54081
54082
54083
54084
54085
54086
54087

(continued next page)

Gear Catalog

29
®

SPUR GEARS
24 AND 20 DIAMETRAL PITCH
DELRIN, BRASS, STEEL AND CAST IRON

20° PRESSURE ANGLE
(Will not operate with 141⁄2° spurs)
ALL DIMENSIONS IN INCHES
ORDER BY CATALOG NUMBER OR ITEM CODE

No.
of
Teeth

Style Without Keyway
or Setscrew
See
Page Catalog Item
Proj. 150 Number Code

Hub
Pitch
Dia.

Bore

Dia.

With Keyway
and Setscrew†
Catalog
Item
Number
Code

Face = .250"
Outside Dia. = Pitch Dia. + .083"
DIAMETRAL PITCH
Overall Length = .250" + Hub Proj.
MOLDED DELRIN WITH BRASS INSERTS
44
1.833
YPB2444 54088


45
1.875
YPB2445 54089


48
2.000
YPB2448 54090


50
2.083
YPB2450 54091


.3125
.67
.31
B
52
2.166
YPB2452 54092


54
2.250
YPB2454 54093


56
2.333
YPB2456 54094


60
2.500
YPB2460 54095


BRASS
12
.500
.38
Y2412
09372


15
.625
.50
Y2415
09374


.1875
.25
18
.750
.54
Y2418
09376



24

HUB
PROJ.

FACE

PITCH
DIA.

HUB
DIA.

BORE

OVERALL
LENGTH

STANDARD TOLERANCES
DIMENSION
TOLERANCE
Brass, Steel and Cast Iron
BORE
All
± .0005
Delrin with Brass Inserts
BORE
All
+ .001 – .000

24 D.P.

24D.P.
D.P.
20

24 D.P.

20 D.P.

20 D.P.

REFERENCE PAGES
Alterations — 149
Horsepower Ratings — 46
Lubrication — 149
Materials — 150
Selection Procedure — 37
†YPB gears have one setscrew (#8-32), no keyway.
*5/16" bore have #35 (.110) drilled hole
through one wall, no keyway.
‡3/8" bore have one setscrew.
No keyway.
1/2" bore and larger have standard
keyway at 90° to setscrew.
See Page 150.

30

Gear Catalog
®

21
24
27
30
36
42
48
54
60
72
84
96
120
144

.875
1.000
1.125
1.250
1.500
1.750
2.000
2.250
2.500
3.000
3.500
4.000
5.000
6.000

.250

.3125

.60
.66
.73
.73
.79
.86
.92
.88
.88

A
.25
.25
.31
.31

.375

C

1.00
.38

20

DIAMETRAL PITCH

Y2421
09378


Y2424
09380


Y2427
09382


Y2430
09384


Y2436
09386


Y2442
09388


Y2448
09390


Y2454
09392


Y2460
09394


Y2472
09396


Y2484
09398


Y2496
09400


Y24120 09402


Y24144 09404


Face = .500"
Outside Dia. = Pitch Dia. + .100"
Overall Length = .500" + Hub Proj.

STEEL
12
14
15
16
18
20
24
25
30
35

.600
.700
.750
.800
.900
1.000
1.200
1.250
1.500
1.750

40

2.000

.500
.625
.750

1.72

45
50
60
70

2.250
2.500
3.000
3.500

.500

1.97
1.62
2.12
2.38

80
84
90
100
120
140
160
180
200

4.000
4.200
4.500
5.000
6.000
7.000
8.000
9.000
10.000

.625

1.38

.625

1.50

.625

1.75

.3125
.375

.500

.46
.56
.60
.66
.74
.84
.92
.97
1.22
1.47

YA12
YA14
YA15
.44
YA16
YA18
YA20
YA24
.44
A YA25
YA30
.50
YA35
YA40
.50


YA45
YA50A
.50
YA60A
YA70A
CAST IRON
C YA80
.62
B YA84
YA90
C
YA100
YA120
.62
YA140
D YA160
YA180
.75
YA200
.44

09892
09894
09896
09898
09900
09902
09914
09904
09906
09908
09910


09912
10548
10550
10552

YA12-5/16*
YA14-5/16*
YA15-3/8‡
YA16-3/8‡
YA18-3/8‡
YA20-1/2
YA24-1/2
YA25-1/2
YA30-1/2
YA35-1/2
YA40-1/2
YA40-5/8
YA40-3/4





46128
46129
46130
46131
46132
46133
46134
46135
46136
46137
46138
46139
46140





10554
10556
10558
10560
10562
10564
10566
10568
10570





















SPUR GEARS
16 AND 12 DIAMETRAL PITCH
STEEL AND CAST IRON

20° PRESSURE ANGLE
(Will not operate with 141⁄2° spurs)
ALL DIMENSIONS IN INCHES
ORDER BY CATALOG NUMBER OR ITEM CODE

No.
of
Teeth

Style Without Keyway
or Setscrew
See
Page Catalog Item
Proj. 150 Number Code

Hub
Pitch
Dia.

Bore

Dia.

With Keyway
and Setscrew†
Catalog
Item
Number
Code

Face = .750"
Outside Dia. = Pitch Dia. + .125"
Overall Length = .750" + Hub Proj.

16

DIAMETRAL PITCH
STEEL

HUB
PROJ.

FACE

PITCH
DIA.

HUB
DIA.

BORE

OVERALL
LENGTH

STANDARD TOLERANCES
DIMENSION
BORE
All

16 D.P.

TOLERANCE
±.0005

16 D.P.
12 D.P.
12 D.P. 12 D.P.

16 D.P.

REFERENCE PAGES
Alterations — 149
Horsepower Ratings — 46, 47
Lubrication — 149
Materials — 150
Selection Procedure — 37
†3/8" bore have one setscrew.
No keyway.
YB15-1/2 and larger have standard
keyway at 90° to setscrew.
See page 150.
*YD12-1/2 has one setscrew.
No keyway.
‡YD13-5/8 has one setscrew.
No keyway.
YD14-5/8 bore and larger have standard
keyway at 90° to setscrew.

12
14

.750
.875

.375

.56
.69

.50

15

.938

.375
.500

.75

.50

16
18
20

1.000
1.125
1.250

.500

.81
.94
1.05

.50

24

1.500

1.20

.50

28

1.750

1.45

.50

30

1.875

1.58

.50

32

2.000

36
40
48
56
60
64
72
80

2.250
2.500
3.000
3.500
3.750
4.000
4.500
5.000

96
128
144
160
192

6.000
8.000
9.000
10.000
12.000

.625
.625
.750
.625
.750
.625
.750
.875
.625
.750
.875
1.000
.625

.750

YB12
YB14
YB15

YB16
YB18
YB20
YB24

YB28

YB30


YB32



YB36
YB40
YB48A
YB56A
YB60A
YB64A
YB72A
YB80A

.50

A
1.70

.50

1.95
2.20
2.00
2.50
2.75
2.88
3.38
3.88

.50
.62

.75

09916
09918
09920

09922
09924
09926
09928

09930

09932


09934



09936
09938
10572
10574
10576
10578
10580
10582

YB12-3/8†
YB14-3/8†
YB15-3/8†
YB15-1/2
YB16-1/2
YB18-1/2
YB20-5/8
YB24-5/8
YB24-3/4
YB28-5/8
YB28-3/4
YB30-5/8
YB30-3/4
YB30-7/8
YB32-5/8
YB32-3/4
YB32-7/8
YB32-1









46141
46142
45991
46143
46144
46145
46146
46147
46148
46149
46150
46151
46152
46153
46154
46155
46156
46157









CAST IRON
.750

1.75
2.00
2.00

.75

.875

2.00

.75
1.00

.75
.83
.92
.99
1.07
1.24
1.32

.62
.62

1.40

.62

1.65

.62

1.99

.62

D

12

DIAMETRAL PITCH

YB96
10584


YB128 10588


YB144 10590


YB160 10592


YB192 10594


Face = 1.000"
Outside Dia. = Pitch Dia. + .167"
Overall Length = 1.000" + Hub Proj.

STEEL
12
13
14
15
16
18
20

1.000
1.083
1.167
1.250
1.333
1.500
1.667

21

1.750

24

2.000

28

2.333

30
36
42
48
54

2.500
3.000
3.500
4.000
4.500

.500
.625
.750
.750
.875
.750
.875
1.000
.750
.875
1.000
.750
.875

2.15
1.94
2.44
2.88
3.38

.62

.62
.88
.88

A

YD12
YD13
YD14
YD15
YD16
YD18
YD20
YD21

YD24


YD28


YD30
YD36A
YD42A
YD48A
YD54A

09940
09942
09944
09946
09948
09950
09952
09954

09956


09958


09960
10596
10598
10600
10602

Gear Catalog

YD12-1/2*
YD13-5/8‡
YD14-5/8
YD15-5/8
YD16-5/8
YD18-3/4
YD20-3/4
YD21-3/4
YD21-7/8
YD24-3/4
YD24-7/8
YD24-1
YD28-3/4
YD28-7/8
YD28-1






46158
46159
46160
46161
46162
46163
46164
46165
46166
46167
46168
46169
46170
46171
46172






31
®

SPUR GEARS
12 AND 10 DIAMETRAL PITCH
CAST IRON AND STEEL

20° PRESSURE ANGLE
(Will not operate with 141⁄2° spurs)
ALL DIMENSIONS IN INCHES
ORDER BY CATALOG NUMBER OR ITEM CODE

No.
of
Teeth

Style Without Keyway
or Setscrew
See
Page Catalog Item
Proj. 150 Number Code

Hub
Pitch
Dia.

Bore

Dia.

Face = 1.000"
Outside Dia. = Pitch Dia. + .166"
Overall Length = 1.000" + Hub Proj.

12

DIAMETRAL PITCH
60
66
72
84
96
108
120
132
144
168
192
216

HUB
PROJ.

FACE

5.000
5.500
6.000
7.000
8.000
9.000
10.000
11.000
12.000
14.000
16.000
18.000

.875

2.12
2.25
2.25

1.000

2.50
2.75

10
PITCH
DIA.

HUB
DIA.

BORE

OVERALL
LENGTH

STANDARD TOLERANCES
DIMENSION
BORE
All

12 D.P.

TOLERANCE
±.0005

12 D.P.
10 D.P.
10 D.P.

12 D.P.

10 D.P.

DIAMETRAL PITCH
12
14
15
16

1.200
1.400
1.500
1.600

.625

18

1.800

20

2.000

24

2.400

25

2.500

28

2.800

.750
.875
.875
1.000
.875
1.000
.875
1.000
.875
1.000

30
35
40
45
48
50

3.000
3.500
4.000
4.500
4.800
5.000

55
60
70
80
90
100
120
140
160
200

5.500
6.000
7.000
8.000
9.000
10.000
12.000
14.000
16.000
20.000

.750

.875
1.000

.92
1.12
1.22
1.32
1.42
1.62
2.02
2.12
2.42
2.00
2.50
2.95
3.45
3.75
3.95

CAST IRON
B
YD60
10604


YD66
10606


.88
YD72
10608


YD84
10610


YD96
10612


YD108 10614


.88
D
YD120 10616


YD132 10618


YD144 10620


1.00
YD168 10622


YD192 10624


YD216 10626


Face = 1.250"
Outside Dia. = Pitch Dia. + .200"
Overall Length = 1.250" + Hub Proj.
STEEL
YF12
YF14
YF15
.62
YF16
YF18
.62

YF20
.62

A
YF24
.62

YF25
.62

YF28
.62

YF30A
.88
YF35A
YF40A
YF45A
.88
YF48A
YF50A
CAST IRON
.62

B
1.000

2.50

1.00

3.00

1.12

3.25

1.25

D
1.125

YF55
YF60
YF70
YF80
YF90
YF100
YF120
YF140
YF160
YF200B

†All gears have standard keyway at 90° to setscrew. See Page 150.

REFERENCE PAGES
Alterations — 149
Horsepower Ratings — 47, 48
Lubrication — 149
Materials — 150
Selection Procedure — 37

32

Gear Catalog
®

With Keyway
and Setscrew†
Catalog
Item
Number
Code

09962
09964
09966
09968
09970

09972

09974

09976

09978

10630
10632
10634
10636
10638
10640
10642
10644
10646
10648
10650
10652
10656
10658
10660
10664

YF12-5/8
YF14-5/8
YF15-3/4
YF16-3/4
YF18-3/4
YF18-7/8
YF20-7/8
YF20-1
YF24-7/8
YF24-1
YF25-7/8
YF25-1
YF28-7/8
YF28-1

















46173
46174
46175
46176
46177
46178
46179
46180
46181
46182
46183
46184
46185
46186

















SPUR GEARS
8 AND 6 DIAMETRAL PITCH
STEEL AND CAST IRON

20° PRESSURE ANGLE
(Will not operate with 141⁄2° spurs)
ALL DIMENSIONS IN INCHES
ORDER BY CATALOG NUMBER OR ITEM CODE

No.
of
Teeth

Style Without Keyway
or Setscrew
See
Page Catalog Item
Proj. 150 Number Code

Hub
Pitch
Dia.

Bore

Dia.

With Keyway
and Setscrew†
Catalog
Item
Number
Code

Face = 1.500"
Outside Dia. = Pitch Dia. + .250"
Overall Length = 1.500" + Hub Proj.

8

DIAMETRAL PITCH
STEEL

HUB
PROJ.

FACE

PITCH
DIA.

STANDARD TOLERANCES
DIMENSION

1.500
1.750

.750

1.12
1.31

15

1.875

1.43

16

2.000

18

2.250

20

2.500

22

2.750

24

3.000

28
32
36

3.500
4.000
4.500

.750
.875
.875
1.000
.875
1.000
1.125
.875
1.000
1.125
.875
1.000
1.125
.875
1.000
1.125
.875

40
44
48
56
60
64
72
80
88
96
112
120
128

5.000
5.500
6.000
7.000
7.500
8.000
9.000
10.000
11.000
12.000
14.000
15.000
16.000

HUB
DIA.

BORE

OVERALL
LENGTH

BORE

12
14

TOLERANCE

All

±.0005

1.000

1.000

1.56
1.81
2.06
2.31
2.56
3.06
3.00
3.50

2.50

YH12
YH14
YH15
.75

YH16
.88

YH18
.88
A


YH20
.88


YH22
.88


YH24
.88


.88
YH28
YH32C
.88
YH36C
CAST IRON
YH40B
B
YH44B
YH48B
1.00
YH56B
C
YH60
.75

3.00
1.125

D
1.25

3.25

6

DIAMETRAL PITCH
8 D.P.
8 D.P.

8 D.P.

YH12-3/4
YH14-3/4
YH15-3/4
YH15-7/8
YH16-7/8
YH16-1
YH18-7/8
YH18-1
YH18-1-1/8
YH20-7/8
YH20-1
YH20-1-1/8
YH22-7/8
YH22-1
YH22-1-1/8
YH24-7/8
YH24-1
YH24-1-1/8




46187
46188
46189
46190
46191
46192
46193
46194
46195
46196
46197
46198
46199
46200
46201
46202
46203
46204




10670


10672


10674


10676


10678


YH64B 10680


YH72B 10682


YH80B 10684


YH88B 10686


YH96B 10688


YH112B 10690


YH120 10692


YH128B 10694


Face = 2.000"
Outside Dia. = Pitch Dia. + .333"
Overall Length = 2.000" + Hub Proj.

STEEL

6 D.P.
6 D.P.

6 D.P.

09980
09982
09984

09986

09988


09990


09992


09994


09996
10666
10668

12

2.000

14

2.333

15

2.500

1.000
1.000
1.125
1.000
1.125
1.1875
1.250

1.46

.88

1.79

.88

1.96

.88

A

YJ12
YJ14

YJ15




09998
10000

10002




YJ12-1
YJ14-1
YJ14-1-1/8
YJ15-1
YJ15-1-1/8
YJ15-1-3/16
YJ15-1-1/4

46205
46206
46207
46208
46209
46210
46211

†All gears have standard keyway at 90° to setscrew. See Page 150.

REFERENCE PAGES
Alterations — 149
Horsepower Ratings — 48, 49
Lubrication — 149
Materials — 150
Selection Procedure — 37

Gear Catalog

33
®

SPUR GEARS
6 AND 5 DIAMETRAL PITCH
STEEL AND CAST IRON

20° PRESSURE ANGLE
(Will not operate with 141⁄2° spurs)
ALL DIMENSIONS IN INCHES
ORDER BY CATALOG NUMBER OR ITEM CODE

No.
of
Teeth

Style Without Keyway
or Setscrew
See
Page Catalog Item
Proj. 150 Number Code

Hub
Pitch
Dia.

Bore

Dia.

With Keyway
and Setscrew†
Catalog
Item
Number
Code

Face = 2.000"
Outside Dia. = Pitch Dia. + .333"
Overall Length = 2.000" + Hub Proj.

6

DIAMETRAL PITCH
STEEL

HUB
PROJ.

FACE

PITCH
DIA.

HUB
DIA.

BORE

OVERALL
LENGTH

STANDARD TOLERANCES
DIMENSION
BORE

TOLERANCE

All

±.0005

16

2.667

18

3.000

21

3.500

24
27
30

4.000
4.500
5.000

33
36
42
48
54
60
66
72
84
96
108
120

5.500
6.000
7.000
8.000
9.000
10.000
11.000
12.000
14.000
16.000
18.000
20.000

1.000
1.125
1.1875
1.250
1.000
1.125
1.1875
1.250
1.000
1.125
1.1875
1.250

2.13

2.46

2.96

YJ16



YJ18

.88


A
YJ21

.88


YJ24A
.88
YJ27A
YJ30C
CAST IRON

.88

1.125

3.00
3.50
4.00

1.125

3.00
3.50

1.50

B
A

1.250

3.50

1.50

B
C

1.250

4.00

1.50
D

1.375

4.50

1.50

5

DIAMETRAL PITCH

10004



10006



10008



10704
10706
10708

YJ16-1
YJ16-1-1/8
YJ16-1-3/16
YJ16-1-1/4
YJ18-1
YJ18-1-1/8
YJ18-1-3/16
YJ18-1-1/4
YJ21-1
YJ21-1-1/8
YJ21-1-3/16
YJ21-1-1/4




46212
46213
46214
46215
46216
46217
46218
46219
46220
46221
46222
46223




YJ33B
10710


YJ36B
10712


YJ42B
10714


YJ48B
10716


YJ54B
10718


YJ60B
10720


YJ66B
10722


YJ72B
10724


YJ84B
10726


YJ96B
10728


YJ108B 10730


YJ120B 10732


Face = 2.500"
Outside Dia. = Pitch Dia. + .400"
Overall Length = 2.500" + Hub Proj.

STEEL

6 D.P.
6 D.P.

6 D.P.

5 D.P.
5 D.P.
5 D.P.

REFERENCE PAGES
Alterations — 149
Horsepower Ratings — 49, 50
Lubrication — 149
Materials — 150
Selection Procedure — 37

12
14
15
16
18
20

2.400
2.800
3.000
3.200
3.600
4.000

24
25
28
30
35
40
45
50
60
70
80
100
110
120
140
160
180

4.800
5.000
5.600
6.000
7.000
8.000
9.000
10.000
12.000
14.000
16.000
20.000
22.000
24.000
28.000
32.000
36.000

1.125

1.78
2.18
2.38
2.58
2.98
3.38

1.125

3.75

1.250

3.75
4.00

1.375

4.38

1.500

4.75
5.00
5.00
5.00
5.50

1.625

YK12
YK14
YK15
.88
A
YK16
YK18
YK20
CAST IRON
YK24
YK25B
1.25
A
YK28
YK30B
YK35B
B
YK40B
1.25
YK45B
C
YK50
YK60
1.50
YK70B
YK80B
YK100
1.75
D
YK110
YK120
YK140B
2.00
YK160B
YK180B

†All gears have standard keyway at 90° to setscrew. See Page 150.

34

Gear Catalog
®

10010
10012
10014
10016
10018
10020















10738
10740
10742
10744
10746
10748
10750
10752
10754
10756
10758
10762
10764
10766
10768
10770
10772





































RACK
20 THROUGH 4 DIAMETRAL PITCH
STEEL

20° PRESSURE ANGLE
(Will not operate with 141⁄2° spurs)
ALL DIMENSIONS IN INCHES
ORDER BY CATALOG NUMBER OR ITEM CODE

Overall
Thickness

Pitch Line Nominal
Mating
to Back
Length Spur Gear
(B)
(Feet)
Page No.

Steel
Catalog Item
Number Code

20
DIAMETRAL PITCH
.500

.450

FACE WIDTH - .500”
4
6

30

L2020-4 12758
L2020-6 12760

16

DIAMETRAL PITCHFACE WIDTH - .750”
4
.750
.688
31
6

L2016-4 12762
L2016-6 12764

12
DIAMETRAL PITCH
PITCH LINE
TO BACK
(B)

1.000
WIDTH

.917

FACE WIDTH - 1.000”
4
6

31 – 32

L2012-4 37320
L2012-6 37322

10
DIAMETRAL PITCH
1.250

1.150

FACE WIDTH - 1.250”
4
6

32

L2010-4 37316
L2010-6 37318

8
OVERALL
THICKNESS

LENGTH

DIAMETRAL PITCH
1.500

1.375

FACE WIDTH - 1.500”
4
6

33

L208-4
L208-6

37312
37314

6
DIAMETRAL PITCH

STANDARD TOLERANCES
DIMENSION
LENGTH†
All
1/2 – 3/4
FACE
1 – 1-1/2
WIDTH
2 – 2-1/2
3-1/2

1.500

TOLERANCE
+1.000 – .000
+.000 – .002
+.000 – .003
+.000 – .004
+.000 – .006

†Ends not machined. Tolerance allows for cutting and
matching.

33 – 34

L206-4
L206-6

37308
37310

5
DIAMETRAL PITCH
1.500

1.300

FACE WIDTH - 2.500”
4
6

34

L205-4
L205-6

37304
37306

4
DIAMETRAL PITCH
2.000

PITCH DIA
OF GEAR
(D)

1.333

FACE WIDTH - 2.000”
4
6

1.750

FACE WIDTH - 3.500”
4
6



L204-4
L204-6

37300
37302

FACE
WIDTH

GEAR
CENTER LINE
TO BACK OF RA
B+D
2

CK

OVERALL
THICKNESS

LENGTH
PITCH LINE
TO BACK
(B)

REFERENCE PAGES
Alterations — 149
Lubrication — 149
Materials — 150

Gear Catalog

35
®

INTERNAL GEARS
64 THROUGH 24 DIAMETRAL PITCH
BRASS

20° PRESSURE ANGLE
(Will not operate with 141⁄2° spurs)
ALL DIMENSIONS IN INCHES
ORDER BY CATALOG NUMBER OR ITEM CODE

No. of
Teeth

Pitch
Dia.

O.D.

I.D.

DIAMETRAL PITCH
64
1.000
96
1.500
128
2.000
192
3.000

1.500
2.000
2.750
3.750

.980
1.480
1.980
2.980

FACE WIDTH - .125”
YI6464
12030
YI6496
12032
YI64128
12034
YI64192
12036

1.500
2.000
2.750
3.750
4.750

.974
1.474
1.974
2.974
3.974

FACE WIDTH - .125”
YI4848
12020
YI4872
12022
YI4896
12024
YI48144
12026
YI48192
12028

2.000
2.750
3.750
4.750
6.750

1.461
1.961
2.961
3.961
5.961

FACE WIDTH - .188”
YI3248
12010
YI3264
12012
YI3296
12014
YI32128
12016
YI32192
12018

2.250
2.750
3.750
4.750
6.750

1.450
1.950
2.950
3.950
5.950

FACE WIDTH - .250”
YI2436
12000
YI2448
12002
YI2472
12004
YI2496
12006
YI24144
12008

64

48

DIAMETRAL PITCH
48
1.000
72
1.500
96
2.000
144
3.000
4.000
192

32
FACE

PITCH
DIA.

OUTSIDE
DIA.

INSIDE
DIA.

DIAMETRAL PITCH
48
1.500
64
2.000
96
3.000
128
4.000
192
6.000

24

DIAMETRAL PITCH
36
1.500
48
2.000
72
3.000
96
4.000
144
6.000

Catalog
Number

Item
Code

NOTE: The difference in tooth numbers between Gear and Pinion should not be less than 12.

STANDARD TOLERANCES
DIMENSION
64 Pitch
48 Pitch
I.D.
32 Pitch
24 Pitch
O.D.
All

All
All
All
All

TOLERANCE
+.004 – .000
+.005 – .000
+.006 – .000
+.008 – .000
+.001 + .003

PINION
PITCH DIA.
(d)
CENTER DISTANCE
GEAR
PITCH DIA.
(D)

CENTER = D – d
DISTANCE
2

36

Gear Catalog
®

SPUR GEARS
Boston spur gears are designed to transmit motion or power between parallel
shafts. Configurations include spur, rack, pinion wire, stem pinions and internal gears; most with a selection of bores, keyways and setscrews. Styles
include plain, web, web with lightening holes or spoked. Change gears have
consecutive numbers of teeth for reduction uses.
Boston fine-pitch spur gears are available in Delrin and Brass. Configurations
include spur, rack, pinion wire and internal gears; most with a selection of
bores, keyways, and setscrews. Styles include plain, web with lightening
holes or spoked.

SELECTION PROCEDURE

SELECTION HINTS

1. Determine service factor.
a. Using application Classification Chart, pages 152153, determine service factor or
b. With knowledge of operating conditions and load
classification, select service factor from Table 1
below.

A. Select pinion having pitch diameter at least twice the
shaft diameter.
B. Pinion number of teeth should be greater than 16 for
14 1⁄2°PA and 13 for 20°PA to avoid excessive undercutting.
C. For tooth numbers or RPMs not on Chart, interpolation of
horsepower is adequate.

Design HP = Application Load X Service Factor (Table 1)
3. Select spur gear pinion with horsepower capacity equal to
(or greater than) design horsepower determined in Step 2.
141⁄2° Pressure Angle Spur Gears—Page 38 to Page 45.
20° Pressure Angle Spur Gears— Page 46 to Page 50.
4. Select a driven spur gear with a catalog rating equal to or
greater than the horsepower determined in Step 2. All ratings are predicated on gears properly lubricated and
maintained.

D. Pitchline velocities above 1000 FPM are not recommended for metallic spur gears. The Selection Chart
reflects this in the lack of ratings for larger numbers of
teeth at higher RPM’s. Ratings to the right of heavy line
are not recommended, as suggested maximum velocity
is exceeded, and should be used for interpolation
purposes only.

TABLE 1
Service
Factor
.8
1.0
1.25
1.50
1.75
2.0

Operating Conditions
Uniform — not more than 15 minutes in 2 hours.
Moderate Shock — not more than 15 minutes in 2 hours.
Uniform — not more than 10 hours per day.
Moderate Shock — not more than 10 hours per day.
Uniform — more than 10 hours per day.
Heavy Shock — not more than 15 minutes in 2 hours.
Moderate Shock — more than 10 hours per day.
Heavy Shock — not more than 10 hours per day.
Heavy Shock — more than 10 hours per day.

Heavy shock loads and/or severe wear conditions may require
the use of higher service factors. Consultation with factory is
recommended in these applications.

Gear Catalog

37
®

SPUR GEARS
APPROXIMATE HORSEPOWER AND TORQUE* RATINGS
FOR CLASS I SERVICE (Service Factor = 1.0)
32 DIAMETRAL PITCH STEEL
25 RPM

50 RPM

100 RPM

141⁄2° PRESSURE ANGLE
200 RPM

300 RPM

3/16" FACE

600 RPM

900 RPM

REFERENCE PAGE 7.

1200 RPM

1800 RPM

3600 RPM

No.
Teeth

H.P. Torque H.P. Torque H.P. Torque H.P. Torque H.P. Torque H.P. Torque H.P. Torque H.P. Torque H.P. Torque

H.P.

Torque

16
18
20
22
24
26
28
30
32
40
48
56
64
80
96
128
160
192

.003
7.4
.003
8.9
.004 10.2
.005 11.7
.01
13.0
.01
14.5
.01
15.9
.01
17.3
.01
18.9
.01
24.5
.01
29.9
.01
35.7
.02
41.4
52.4
.02
.02
62.6
.03
83.9
.04 106
.05 126

.24
.27
.30
.32
.34
.37
.39
.40
.43
.48
.52
.55
.58

4.2
4.7
5.2
5.7
6.0
6.4
6.8
7.0
7.4
8.4
9.0
9.7
10.2

.01
7.3
.01
8.8
.01 10.2
.01 11.6
.01 12.9
.01 14.4
.01 15.1
.01 17.0
.01 18.7
.02 24.2
.02 29.4
.03 35
.03 40.6
.04 51
.05 60.6
.06 80.6
.08 101
.09 119

.01
7.3
.01
8.7
.02 10.1
.02 11.4
.02 12.7
.02 14.1
.02 15.5
.03 16.7
.03 18.3
.04 23.6
.05 28.5
.05 33.8
.06 38.9
.08 48.5
.09 57.1
.12 74.6
.15 92.1
.17 107

24 DIAMETRAL PITCH STEEL
25 RPM

50 RPM

100 RPM

.02
.03
.03
.04
.04
.04
.05
.05
.06
.07
.09
.10
.11
.14
.16
.21
.25
.28

7.1
8.5
9.8
11.1
12.3
13.7
14.9
16.1
17.6
22.4
26.8
31.5
36
44.2
51.2
64.9
78.2
88.4

.03
.04
.05
.05
.06
.06
.07
.07
.08
.10
.12
.14
.16
.19
.22
.27
.32
.36

7.0
8.3
9.6
10.8
11.9
13.3
14.5
15.5
16.9
21.3
25.4
29.6
33.5
40.6
46.4
57.5
67.8
75.4

.06
.07
.08
.09
.10
.12
.12
.13
.14
.18
.21
.24
.26
.31
.34
.41
.46
.50

6.6
7.8
8.9
9.9
10.9
12.0
13.1
13.9
15.2
18.7
21.8
24.9
27.8
32.5
36.2
42.7
48.6
52.4

141⁄ 2° PRESSURE ANGLE
200 RPM

300 RPM

.09
.10
.12
.13
.14
.16
.17
.18
.20
.24
.27
.31
.34
.39
.42
.49
.54
.57

6.3
7.3
8.3
9.3
10.1
11.1
12.0
12.7
13.7
16.7
19.1
21.6
23.7
27.2
29.6
34
37.9
40.1

.11
.13
.15
.16
.18
.20
.21
.22
.24
.29
.32
.36
.39
.44
.48
.54

5.9
6.9
7.8
8.7
9.4
10.2
11.0
11.7
12.6
15
17
18.9
20.7
23.3
25.1
28.3

1/4" FACE

600 RPM

900 RPM

.15
.18
.20
.22
.24
.26
.27
.29
.31
.36
.40
.44
.47
.52
.55

5.4
6.1
6.9
7.6
8.3
8.9
9.5
10.0
10.7
12.5
13.9
15.3
16.5
18.2
19.2

REFERENCE PAGE 8.

1200 RPM

1800 RPM

3600 RPM

No.
Teeth

H.P. Torque H.P. Torque H.P. Torque H.P. Torque H.P. Torque H.P. Torque H.P. Torque H.P. Torque

H.P. Torque

H.P.

Torque

12
14
15
16
18
20
21
24
30
36
42
48
60
72
96
120
144

.004
.01
.01
.01
.01
.01
.01
.01
.02
.02
.02
.03
.04
.04
.06
.07
.09

.22
.28
.31
.33
.38
.42
.45
.50
.60
.68
.74
.80
.89
.96

.35
.43
.46
.49
.55
.61
.63
.69
.80
.89
.94
.99

6.1
7.5
8.0
8.6
9.7
10.6
11.0
12.0
13.9
15.5
16.5
17.4

10.9
14.2
15.8
17.5
20.9
24.3
26.1
30.7
40.7
51.2
60.7
70.4
90
109
147
185
219

.01
.01
.01
.01
.02
.02
.02
.02
.03
.04
.05
.05
.07
.08
.11
.14
.16

10.8
14.1
15.7
17.4
20.7
24.1
25.8
30.4
40.2
50.4
59.6
68.9
87.7
106
141
175
207

.02
10.7
.02
13.9
.02
15.5
.03
17.2
.03
20.4
.04
23.7
.04
25.4
.05
29.7
.06
39.2
.08
48.8
.09
59.5
.11
66.2
.13
83.3
.16
99.8
.21 130
.25 159
.29 185

.03
10.5
.04
13.6
.05
15.1
.05
16.7
.06
19.8
.07
22.9
.08
24.5
.09
28.5
.12
37.2
.15
46
.17
53.6
.19
61.3
.24
75.9
.28
89.5
.36 113
.43 135
.49 153

.05
.06
.07
.08
.09
.11
.11
.13
.17
.21
.24
.27
.33
.39
.48
.56
.62

10.3
13.3
14.7
16.2
19.2
22.1
23.6
27.5
35.5
43.5
50.3
57
69.6
81
100
118
131

.09
.12
.13
.14
.17
.19
.20
.23
.30
.36
.40
.45
.53
.60
.71
.80
.86

9.7
12.4
13.7
15
17.6
20.1
21.4
24.6
31.1
37.3
42.4
47.2
55.9
63.2
74.7
84.3
90.8

.13
.17
.18
.20
.23
.26
.28
.32
.40
.47
.52
.58
.67
.74
.85
.94
.99

9.2
11.6
12.8
14
16.3
18.5
19.6
22.3
27.7
32.7
36.6
40.3
46.6
51.8
59.5
65.7
69.6

.17
.21
.23
.25
.29
.33
.34
.39
.48
.55
.61
.67
.76
.84
.94
1.07

8.7
10.9
12
13.1
15.1
17.1
18.1
20.4
24.9
29.1
32.3
35.1
40
43.9
49.5
56.4

7.9
9.8
10.7
11.6
13.3
14.8
15.6
17.4
20.8
23.9
26
28
31.2
33.6

Ratings are based on strength calculation. Basic static strength rating, or for hand operation of above gears is approximately 3 times the 100 RPM rating.
NOTE: Ratings to right of heavy line are not recommended, as pitch line velocity exceeds 1000 feet per minute.
They should be used for interpolation purposes only.
* Torque Ratings (Lb. Ins.).
Ratings for brass gears are approximately 50% of steel ratings with same face width.

38

Gear Catalog
®

SPUR GEARS
APPROXIMATE HORSEPOWER AND TORQUE* RATINGS
FOR CLASS I SERVICE (Service Factor = 1.0)
20 DIAMETRAL PITCH STEEL
No.
Teeth

11
12
13
14
15
16
18
20
22
24
25
28
30
32
35
36
40
48
50
60
64

25 RPM

50 RPM

141⁄2° PRESSURE ANGLE

100 RPM

200 RPM

300 RPM

3/8" FACE

600 RPM

900 RPM

REFERENCE PAGE 8.

1200 RPM

1800 RPM

3600 RPM

H.P. Torque H.P. Torque H.P. Torque H.P. Torque H.P. Torque H.P. Torque H.P. Torque H.P. Torque H.P. Torque

H.P.

Torque

.01
.01
.01
.01
.01
.02
.02
.02
.02
.03
.03
.03
.03
.04
.04
.04
.05
.06
.06
.08
.08

.66
.70
.77
.84
.90
.97
1.08
1.18
1.26
1.33
1.38
1.47
1.52
1.59
1.66
1.68
1.75

11.6
12.2
13.4
14.7
15.8
16.9
18.9
20.6
22.1
23.3
24.0
25.7
26.6
27.8
29.1
29.3
30.7

21.6
23.5
26.9
30.7
34.2
37.8
45.1
52.4
59.5
66.3
70.5
81.2
87.8
96.3
107
110
124
151
158
193
209

.02
.02
.02
.02
.03
.03
.04
.04
.05
.05
.06
.06
.07
.08
.08
.09
.10
.12
.12
.15
.16

21.4
23.4
26.8
30.5
33.9
37.5
44.7
51.9
58.8
65.4
69.5
80
86.4
94.7
105
108
122
148
154
187
203

.03
.04
.04
.05
.05
.06
.07
.08
.09
.10
.11
.12
.13
.15
.16
.17
.19
.22
.23
.28
.30

21.2
23
26.4
30
33.4
36.8
43.8
50.8
57.5
63.8
67.7
77.7
83.7
91.6
101
104
117
141
146
176
190

.07
.07
.08
.09
.10
.11
.13
.15
.17
.19
.20
.23
.25
.27
.30
.31
.34
.41
.42
.50
.54

20 DIAMETRAL PITCH CAST IRON
25 RPM

50 RPM

100 RPM

20.7
22.5
25.7
29.1
32.3
35.7
42.3
48.7
54.9
60.8
64.4
73.4
78.9
86
94.7
97.1
108
128
133
158
169

.10
.10
.12
.13
.15
.16
.19
.22
.25
.28
.29
.33
.36
.39
.42
.43
.48
.56
.58
.68
.73

20.2 .18 18.9
21.9 .19 20.5
25
.22 23.2
28.3 .25 26.1
31.4 .27 28.8
34.5 .30 31.6
40.8 .35 36.9
46.9 .40 42
52.7 .45 46.8
58
.49 51.1
61.4 .51 53.8
69.7 .57 60.3
74.6 .61 64
81
.66 69.1
88.9 .71 74.9
91
.73 76.4
101
.79 83.5
118
.91 95.4
122
.93 98
143
1.06 112
153
1.12 118

.25
.27
.31
.35
.38
.41
.48
.54
.60
.65
.68
.76
.80
.86
.92
.94
1.02
1.14
1.17
1.31
1.37

141⁄2° PRESSURE ANGLE
200 RPM

300 RPM

600 RPM

17.8
19.2
21.6
24.2
26.6
29
33.7
38
42
45.6
47.9
53.2
56.1
60.2
64.7
65.8
71.2
80
81.7
91.6
96

.32
.34
.39
.43
.47
.51
.59
.66
.73
.78
.82
.91
.95
1.02
1.09
1.10
1.18
1.31
1.34
1.48
1.54

16.8
18
20.3
22.6
24.7
26.9
31
34.8
38.2
41.2
43.1
47.5
50
53.3
57
57.8
62.1
69.8
70.1
77.6
80.9

3/8" FACE
900 RPM

.43
.46
.51
.57
.62
.67
.76
.85
.92
.99
1.03
1.12
1.17
1.24
1.31
1.33
1.41
1.54
1.56
1.70

15.1
16.1
17.9
20
21.7
23.4
26.7
29.7
32.3
34.6
36
39.2
40.9
43.4
46
46.5
49.4
53.8
54.6
59.5

REFERENCE PAGE 9.

1200 RPM

1800 RPM

No.
Teeth

H.P. Torque H.P. Torque H.P. Torque H.P. Torque H.P. Torque H.P. Torque H.P. Torque H.P. Torque H.P. Torque

70
72
80
84
90
96
100
112
120
140
144
160
180
200

.05
.06
.06
.07
.07
.07
.08
.09
.09
.11
.11
.13
.14
.15

137
140
158
166
177
189
196
222
237
273
281
317
353
388

.10
.11
.12
.13
.13
.14
.15
.17
.18
.20
.21
.23
.26
.28

132
136
152
159
169
180
186
210
223
255
262
294
324
354

.20
.20
.22
.23
.25
.26
.27
.30
.32
.36
.37
.41
.44
.48

123
126
141
147
155
164
170
189
200
225
230
256
278
300

.35
.35
.39
.40
.42
.44
.46
.50
.53
.58
.59
.64
.69
.73

109
111
123
127
133
140
144
158
166
183
186
203
217
230

.46
.47
.52
.53
.56
.58
.59
.65
.67
.73
.74
.80
.85
.89

97.5
99.4
108
112
117
122
125
136
141
153
156
168
178
187

.71
.72
.77
.79
.81
.84
.85
.91
.93
.99
1.00
1.06
1.10
1.13

74.2 .86
75.3 .87
80.7 .92
82.7 .94
85.4 .96
87.9 .98
89.5 1.00
95.5 1.05
98.1 1.07
104
105
111
115
119

60
60.6
64.3
65.5
67.2
68.8
69.7
73.6
75.1

.96
.97
1.02
1.03

3600 RPM
H.P. Torque

50.2
50.7
53.4
54.3

Ratings are based on strength calculation. Basic static strength rating, or for hand operation of above gears is approximately 3 times the 100 RPM rating.
NOTE: Ratings to right of heavy line are not recommended, as pitch line velocity exceeds 1000 feet per minute.
They should be used for interpolation purposes only.
*Torque Ratings (Lb. Ins.).

Gear Catalog

39
®

SPUR GEARS
APPROXIMATE HORSEPOWER AND TORQUE* RATINGS
FOR CLASS I SERVICE (Service Factor = 1.0)
16 DIAMETRAL PITCH STEEL
No.
Teeth

11
12
13
14
15
16
18
20
22
24
26
28
30
32
36
40
48

25 RPM

50 RPM

141⁄ 2° PRESSURE ANGLE

100 RPM

200 RPM

300 RPM

1/2" FACE

600 RPM

900 RPM

REFERENCE PAGE 9 & 10.

1200 RPM

1800 RPM

H.P.

Torque

.02
.02
.02
.03
.03
.03
.04
.04
.05
.05
.06
.07
.07
.08
.09
.10
.12

1.24
1.29
1.42
1.55
1.66
1.77
1.96
2.13
2.27
2.38
2.51
2.62
2.69
2.81

21.7
22.6
24.9
27.1
29.0
30.9
34.3
37.2
39.7
41.7
43.9
45.8
47.1
49.3

44.9
48.9
56.1
63.8
71.1
78.7
93.8
109
124
138
154
168
182
200
228
258
314

.04
.04
.04
.05
.06
.06
.07
.09
.10
.11
.12
.13
.14
.16
.18
.20
.24

44.5
48.5
55.6
63.2
70.3
77.8
99.6
107
122
135
151
165
179
196
223
251
304

.07
.08
.09
.10
.11
.12
.14
.17
.19
.21
.23
.25
.27
.30
.34
.38
.45

43.9
47.8
54.7
62
68.9
76.2
90.5
105
118
131
146
160
172
188
213
239
286

.14
.15
.17
.19
.21
.23
.27
.32
.36
.39
.43
.47
.51
.55
.62
.69
.81

16 DIAMETRAL PITCH CAST IRON
25 RPM

50 RPM

100 RPM

42.7 .20
46.3 .21
52.9 .24
59.8 .28
66.4 .30
73.1 .33
86.5 .39
99
.45
112
.51
124
.56
137
.61
149
.66
160
.71
174
.77
196
.86
217
.95
257
1.11

41.5
44.9
51.2
57.8
63.9
70.3
82.8
94.9
106
117
129
140
149
162
181
200
232

.36
.39
.44
.50
.55
.60
.70
.79
.88
.96
1.04
1.12
1.19
1.28
1.40
1.52
1.73

38.3
41.2
46.7
52.4
57.6
63
73.4
83.2
92.3
100
110
118
125
134
147
160
181

.51
.54
.61
.68
.75
.82
.94
1.06
1.16
1.26
1.36
1.45
1.53
1.63
1.77
1.91
2.12

141⁄ 2° PRESSURE ANGLE
200 RPM

300 RPM

600 RPM

35.6
38.1
42.9
47.9
52.5
57.1
65.9
74.1
81.5
88
95.4
102
107
114
124
134
149

.63
33.2
.67
35.4
.76
39.7
.84
44.2
.92
48.1
.99
52.2
1.14 59.8
1.27 66.7
1.39 72.9
1.49 78.3
1.61 84.4
1.71 89.6
1.79 93.8
1.90 99.7
2.05 107
2.18 115
2.40 126

1/2" FACE
900 RPM

.84
.89
.99
1.09
1.18
1.27
1.44
1.59
1.72
1.83
1.96
2.06
2.15
2.27
2.42
2.55
2.76

29.4
31
34.6
38.2
41.3
44.5
50.4
55.7
60.3
64.2
68.6
72.3
75.1
79.4
84.6
89.4
96.5

REFERENCE PAGE 10.

1200 RPM

1800 RPM

No.
Teeth

H.P. Torque H.P. Torque H.P. Torque H.P. Torque H.P. Torque H.P. Torque H.P. Torque H.P. Torque H.P. Torque

54
56
60
64
72
80
84
96
112
120
128
144
160
192

.09
.09
.10
.10
.12
.13
.14
.15
.18
.19
.20
.23
.26
.307

217
224
239
260
290
327
342
388
455
486
516
574
648
762

.17
.17
.18
.20
.22
.25
.26
.29
.34
.36
.38
.42
.47
.54

209
216
231
249
277
311
325
365
425
452
477
527
590
683

.31
.32
.34
.37
.40
.45
.47
.52
.60
.63
.66
.72
.79
.90

196
202
214
231
255
283
294
327
376
396
415
453
500
566

.55
.57
.60
.64
.69
.76
.79
.86
.97
1.01
1.05
1.12
1.22
1.34

16 DIAMETRAL PITCH NON-METALLIC
No.
Teeth

3600 RPM

H.P. Torque H.P. Torque H.P. Torque H.P. Torque H.P. Torque H.P. Torque H.P. Torque H.P. Torque H.P. Torque

25 RPM

50 RPM

100 RPM

173
178
188
201
219
240
248
271
304
318
330
353
384
421

.74
.76
.80
.85
.91
.99
1.02
1.10
1.22
1.26
1.30
1.38
1.48
1.60

156
160
167
178
192
208
214
231
256
265
274
289
311
335

1.13
1.16
1.20
1.26
1.33
1.42
1.45
1.53
1.65
1.69
1.72
1.79
1.89

119
121
126
132
140
149
152
161
173
177
181
188
198

1.38
1.40
1.44
1.50
1.57
1.66
1.69
1.76

141⁄ 2° PRESSURE ANGLE

200 RPM

300 RPM

600 RPM

96.6
98.1
100
105
110
116
118
123

1.54
1.57
1.60
1.67

.06
.09
.11
.14
.18
.21
.26

19
28
34
44
57
63
82

.09
.12
.15
.19
.24
.28
.34

19
30
31
40
50
58
71

.15
.20
.24
.31
.38
.44
.54

16
21
25
32
40
46
57

.20
.26
.31
.40
.49
.60
.72

14
18
22
28
34
40
50

.25
.32
.38
.49
.62
.72
.88

Torque

REFERENCE PAGE 10.

1200 RPM

1800 RPM

H.P. Torque H.P. Torque H.P. Torque H.P. Torque H.P. Torque H.P. Torque H.P. Torque H.P. Torque H.P. Torque

16
20
24
32
40
48
64

H.P.

81.1
82.2
84.2
87.5

1/2" FACE

900 RPM

3600 RPM

13
17
20
26
32
37
46

.32
.42
.50
.65
.82
.96
1.20

11
15
17
23
29
33
42

3600 RPM
H.P.

Torque

.56
.69
.82
1.12
1.41
1.65

9
12
14
20
25
29

Ratings are based on strength calculation. Basic static strength rating, or for hand operation of above gears is approximately 3 times the 100 RPM rating.
NOTE: 1. Ratings to right of heavy line are not recommended, as pitch line velocity exceeds 1000 feet per minute.
They should be used for interpolation purposes only.
2. Non-metallic gears are most commonly used for the driving pinion of a pair of gears, with mating gear made of Cast Iron or Steel, where pitch line velocities exceed
1000 FPM and are not subjected to shock loads.
*Torque Ratings (Lb. Ins.).

40

Gear Catalog
®

SPUR GEARS
APPROXIMATE HORSEPOWER AND TORQUE* RATINGS
FOR CLASS I SERVICE (Service Factor = 1.0)
12 DIAMETRAL PITCH STEEL
No.
Teeth

11
12
13
14
15
16
18
20
21
22
24
30
32
36
40
42

25 RPM

50 RPM

141⁄ 2° PRESSURE ANGLE

100 RPM

3/4" FACE

200 RPM

300 RPM

600 RPM

900 RPM

REFERENCE PAGE 10.

1200 RPM

1800 RPM

H.P. Torque H.P. Torque

H.P. Torque

H.P. Torque

H.P. Torque

H.P. Torque H.P. Torque H.P. Torque

H.P.

Torque

.05
.05
.06
.07
.07
.08
.10
.11
.12
.13
.14
.19
.21
.24
.27
.28

.09
.10
.12
.13
.15
.16
.19
.23
.24
.26
.28
.37
.41
.46
.52
.55

.35
.38
.44
.49
.55
.60
.71
.82
.87
.92
1.01
1.29
1.40
1.57
1.74
1.80

.51
.55
.63
.71
.78
.86
1.01
1.15
1.22
1.28
1.41
1.78
1.92
2.13
2.34
2.42

.93
.99
1.12
1.25
1.37
1.50
1.73
1.95
2.06
2.15
2.33
2.85
3.05
3.33
3.59
3.69

1.27
1.35
1.51
1.68
1.83
1.99
2.28
2.54
2.67
2.78
2.98
3.57
3.80
4.09
4.37
4.46

2.82
2.92
3.19
3.46
3.69
3.91
4.31
4.65
4.81
4.93
5.14

49.4
51.1
55.9
60.6
64.6
68.5
75.4
81.4
84.3
86.2
90.0

119
130
149
169
189
209
249
289
310
328
365
483
529
605
682
715

118
129
147
167
186
206
245
284
304
322
357
470
514
586
659
689

.18
.20
.23
.26
.29
.32
.38
.44
.47
.49
.54
.71
.77
.88
.98
1.02

116
126
144
163
181
200
237
274
293
310
343
447
488
552
617
644

12 DIAMETRAL PITCH CAST IRON
25 RPM

50 RPM

100 RPM

112
120
138
156
172
190
224
257
274
288
317
407
442
495
547
568

108
116
132
149
164
180
242
215
257
270
296
373
403
448
492
509

97
104
118
131
144
157
182
205
216
226
245
299
320
349
377
387

141⁄ 2° PRESSURE ANGLE
200 RPM

300 RPM

600 RPM

88.6
94.4
106
118
128
139
159
178
187
195
209
250
266
286
306
312

1.55
1.64
1.83
2.03
2.20
2.38
2.70
2.99
3.14
3.25
3.47
4.09
4.32
4.62
4.90
4.99

81.5
86.3
96.3
107
116
125
142
157
164
171
182
215
227
243
257
262

3/4" FACE
900 RPM

2.00
2.10
2.33
2.56
2.76
2.96
3.32
3.64
3.80
3.92
4.14
4.78
5.02
5.31

70
73.6
81.6
89.6
96.6
103
116
127
133
137
145
167
176
186

REFERENCE PAGE 11.

1200 RPM

1800 RPM

No.
Teeth

H.P. Torque H.P. Torque H.P. Torque H.P. Torque H.P. Torque H.P. Torque H.P. Torque H.P. Torque H.P. Torque

48
54
60
64
72
84
96
108
112
120
144
168

.20
.23
.25
.27
.30
.36
.40
.46
.47
.50
.59
.69

497
571
631
683
762
896
1014
1148
1187
1264
1487
1745

.38
.43
.48
.51
.57
.66
.74
.84
.86
.91
1.06
1.22

477
545
600
647
718
837
938
1054
1087
1150
1333
1541

.70 441
.79 500
.87 546
.93 586
1.02 644
1.17 739
1.30 817
1.44 906
1.47 929
1.55 975
1.75 1103
1.98 1248

1.22
1.36
1.47
1.56
1.69
1.90
2.06
2.24
2.29
2.37
2.61
2.87

12 DIAMETRAL PITCH NON-METALLIC
No.
Teeth

3600 RPM

H.P. Torque

25 RPM

50 RPM

100 RPM

384
430
463
493
533
598
649
706
720
748
821
905

1.62
1.79
1.91
2.02
2.17
2.40
2.56
2.76
2.80
2.89
3.11
3.38

340
377
402
425
455
503
538
579
588
607
654
710

2.41
2.62
2.74
2.87
3.01
3.24
3.39
3.58
3.62
3.69
3.86

253
275
288
301
316
340
356
376
379
387
406

2.88
3.09
3.21
3.33
3.46

141⁄ 2° PRESSURE ANGLE

200 RPM

300 RPM

600 RPM

201
216
224
233
242

3.19
3.40

REFERENCE PAGE 11.

1200 RPM

1800 RPM

H.P. Torque H.P. Torque H.P. Torque H.P. Torque H.P. Torque H.P. Torque H.P. Torque H.P. Torque H.P. Torque

15
18
21
24
30
36
48
60

.13
.19
.23
.27
.34
.40
.51
.60

41
60
72
85
107
126
161
189

.20
.26
.31
.36
.44
.52
.66
.80

42
54
65
76
92
109
138
168

.34
.43
.50
.58
.73
.82
1.05
1.29

36
45
52
60
76
86
110
135

.45
.56
.66
.76
.95
1.13
1.39
1.72

31
39
46
53
66
79
97
120

.56
.68
.81
.92
1.14
1.36
1.70
2.13

Torque

167
178

3/4" FACE

900 RPM

3600 RPM
H.P.

29
36
42
48
60
71
89
112

.72
.90
1.06
1.22
1.56
1.83
2.33
2.95

25
31
37
42
54
64
81
103

3600 RPM
H.P.

Torque

1.15
1.44
1.80
2.07
2.64
3.18

20
25
31
36
46
56

Ratings are based on strength calculation. Basic static strength rating, or for hand operation of above gears is approximately 3 times the 100 RPM rating.
NOTE: 1. Ratings to right of heavy line are not recommended, as pitch line velocity exceeds 1000 feet per minute.
They should be used for interpolation purposes only.
2. Non-metallic gears are most commonly used for the driving pinion of a pair of gears, with mating gear made of Cast Iron or Steel, where pitch line velocities exceed
1000 FPM and are not subjected to shock loads.
*Torque Ratings (Lb. Ins.).

Gear Catalog

41
®

SPUR GEARS
APPROXIMATE HORSEPOWER AND TORQUE* RATINGS
FOR CLASS I SERVICE (Service Factor = 1.0)
10 DIAMETRAL PITCH STEEL
No.
Teeth

11
12
14
15
16
18
20
24
25
28
30
32
35
36

25 RPM

50 RPM

141⁄ 2° PRESSURE ANGLE

100 RPM

200 RPM

40
42
45
48
50
54
55
60
64
70
72
80
84
90
96
100
110
120
140
144
160
180

900 RPM

1200 RPM

1800 RPM

3600 RPM
H.P.

Torque

.09
.10
.13
.14
.16
.19
.22
.28
.29
.34
.37
.40
.45
.46

4.85
5.00
5.89
6.25
6.62
7.25
7.79

85
88
103
109
116
127
136

229
249
325
362
400
447
553
698
742
854
922
1010
1123
1153

.18
226
.20
246
.25
320
.28
356
.31
393
.37
468
.43
542
.54
681
.57
722
.66
829
.71
893
.78
977
.86 1083
.88 1111

.35
221 .67
.38
240 .73
.49
311 .93
.55
345 1.03
.60
381 1.13
.72
451 1.33
.83
520 1.53
1.03
648 1.88
1.09
687 1.98
1.24
784 2.24
1.34
842 2.39
1.46
917 2.59
1.60 1011 2.83
1.64 1036 2.89

25 RPM

50 RPM

100 RPM

211
229
294
325
357
420
481
592
625
707
754
817
893
912

.96
1.04
1.33
1.46
1.60
1.87
2.13
2.59
2.73
3.06
3.25
3.51
3.80
3.88

202
218
279
307
337
394
448
545
574
644
683
737
799
815

1.71
1.83
2.30
2.51
2.73
3.15
3.53
4.19
4.38
4.83
5.07
5.41
5.79
5.87

179
192
241
264
287
330
371
440
460
507
533
569
608
617

2.31
2.45
3.04
3.30
3.57
4.07
4.52
5.26
5.49
5.98
6.24
6.61
7.01
7.09

141⁄ 2° PRESSURE ANGLE
200 RPM

300 RPM

600 RPM

162
172
213
231
250
285
317
369
384
419
437
463
491
496

2.80
2.95
3.62
3.92
4.22
4.76
5.26
6.04
6.28
6.79
7.05
7.44
7.83
7.91

147
155
190
206
221
250
276
317
330
357
370
391
411
415

1" FACE
900 RPM

3.55
3.71
4.49
4.82
5.15
5.75
6.28
7.09
7.34
7.85
8.10

124
130
157
169
180
201
220
248
257
275
283

REFERENCE PAGE 12.

1200 RPM

1800 RPM

H.P. Torque H.P. Torque H.P. Torque H.P. Torque H.P. Torque H.P. Torque H.P. Torque H.P. Torque H.P. Torque

.31
.32
.35
.38
.39
.43
.44
.48
.51
.56
.57
.64
.67
.72
.76
.79
.87
.94
1.08
1.11
1.24
1.37

780
818
889
946
983
1083
1105
1199
1297
1410
1447
1623
1697
1807
1916
1988
2203
2380
2724
2791
3132
3459

.59
.62
.67
.71
.74
.82
.83
.90
.97
1.04
1.07
1.19
1.24
1.32
1.39
1.44
1.58
1.69
1.91
1.95
2.16
2.36

749
783
850
901
935
1029
1046
1130
1217
1316
1349
1502
1565
1659
1750
1810
1990
2133
2405
2457
2727
2971

1.10
1.15
1.24
1.31
1.35
1.48
1.50
1.61
1.72
1.84
1.88
2.07
2.15
2.26
2.37
2.44
2.64
2.80
3.09
3.15
3.44
3.68

693
722
780
823
851
931
945
1013
1084
1162
1187
1308
1355
1425
1492
1535
1667
1766
1949
1983
2166
2318

1.92
1.99
2.13
2.23
2.29
2.48
2.51
2.66
2.82
2.99
3.04
3.30
3.39
3.53
3.65
3.74
3.99
4.17
4.48
4.54
4.87
5.11

10 DIAMETRAL PITCH NON-METALLIC
No.
Teeth

600 RPM

REFERENCE PAGE 11.

H.P. Torque H.P. Torque H.P. Torque H.P. Torque H.P. Torque H.P. Torque H.P. Torque H.P. Torque H.P. Torque

10 DIAMETRAL PITCH CAST IRON
No.
Teeth

300 RPM

1" FACE

25 RPM

50 RPM

100 RPM

603
626
670
701
722
782
791
839
890
942
958
1039
1069
1111
1152
1177
1258
1314
1413
1430
1535
1609

2.54
2.63
2.79
2.91
2.98
3.21
3.24
3.41
3.59
3.77
3.82
4.10
4.10
4.34
4.46
4.54
4.81
4.98
5.27
5.33
5.66
5.87

534
552
587
611
626
674
681
716
755
792
803
861
882
911
938
955
1011
1047
1108
1119
1188
1233

3.79
3.88
4.08
4.20
4.27
4.53
4.57
4.73
4.93
5.10
5.15
5.43
5.51
5.63
5.73
5.80
6.05
6.18

398
407
428
441
449
476
480
497
518
535
541
570
579
591
602
609
636
650

4.52
4.61
4.81
4.92
4.99
5.26
5.29
5.43

141⁄ 2° PRESSURE ANGLE

200 RPM

300 RPM

600 RPM

317
323
337
345
350
368
371
381

5.01
5.09

.27
.33
.40
.51
.62

85
104
126
161
195

.38
.47
.54
.67
.81

80
99
113
140
170

.63
.78
.88
1.09
1.29

66
82
92
114
135

.83
58
1.02
71
1.15
80
1.42
99
1.69 118

1.00
1.24
1.39
1.73
2.07

Torque

REFERENCE PAGE 11.

1200 RPM

1800 RPM

H.P. Torque H.P. Torque H.P. Torque H.P. Torque H.P. Torque H.P. Torque H.P. Torque H.P. Torque H.P. Torque

15
18
20
25
30

H.P.

263
267

1" FACE
900 RPM

3600 RPM

52
65
73
90
109

1.31
1.63
1.85
2.32
2.80

46
57
65
81
98

3600 RPM
H.P.

Torque

2.08
2.60
3.12
4.00
4.89

36
45
55
70
86

Ratings are based on strength calculation. Basic static strength rating, or for hand operation of above gears is approximately 3 times the 100 RPM rating.
NOTE: 1. Ratings to right of heavy line are not recommended, as pitch line velocity exceeds 1000 feet per minute.
They should be used for interpolation purposes only.
2. Non-metallic gears are most commonly used for the driving pinion of a pair of gears, with mating gear made of Cast Iron or Steel, where pitch line velocities exceed
1000 FPM and are not subjected to shock loads.
*Torque Ratings (Lb. Ins.).

42

Gear Catalog
®

SPUR GEARS
APPROXIMATE HORSEPOWER AND TORQUE* RATINGS
FOR CLASS I SERVICE (Service Factor = 1.0)
8 DIAMETRAL PITCH STEEL
No.
Teeth

11
12
14
15
16
18
20
22
24
28
30
32

25 RPM

50 RPM

141⁄ 2° PRESSURE ANGLE
100 RPM

200 RPM

300 RPM

1-1/4" FACE

600 RPM

900 RPM

REFERENCE PAGE 12.

1200 RPM

1800 RPM

H.P. Torque H.P. Torque H.P. Torque H.P. Torque H.P. Torque H.P. Torque H.P. Torque H.P. Torque H.P. Torque

.18
.19
.25
.28
.31
.37
.43
.48
.54
.66
.71
.78

446
485
632
703
778
927
1075
1219
1355
1655
1786
1957

.35
.38
.49
.55
.60
.72
.83
.94
1.04
1.27
1.36
1.49

439
478
620
690
762
905
1047
1184
1313
1596
1718
1878

.68
.73
.95
1.05
1.16
1.37
1.58
1.78
1.96
2.37
2.53
2.76

427
463
599
664
731
865
996
1121
1237
1490
1598
1738

1.28
1.38
1.77
1.96
2.15
2.52
2.88
3.21
3.52
4.18
4.44
4.80

8 DIAMETRAL PITCH CAST IRON
25 RPM

50 RPM

100 RPM

404
436
559
617
677
794
907
1012
1109
1316
1400
1513

1.82
1.96
2.49
2.74
3.00
3.49
3.96
4.39
4.78
5.61
5.93
6.38

383
412
524
576
630
734
832
923
1004
1178
1247
1340

3.16
3.37
4.21
4.58
4.97
5.69
6.35
6.95
7.46
8.53
8.93
9.49

332 4.19 294
5.00
354 4.43 310
5.26
442 5.45 382
6.40
481 5.90 413
6.89
522 6.36 445
7.39
598 7.20 504
8.30
667 7.96 557
9.10
730 8.62 603
9.79
783 9.17 642 10.36
896 10.33 723 11.54
938 10.73 752 11.94
997 11.34 794 12.56

141⁄ 2° PRESSURE ANGLE
200 RPM

300 RPM

600 RPM

263 6.21
276 6.47
336 7.75
362 8.29
388 8.83
436 9.80
478 10.64
514 11.34
544 11.90
606
627
660

1-1/4" FACE
900 RPM

1200 RPM

217 8.17
226 8.39
271 9.81
290 10.39
309 10.96
343
372
397
417

1800 RPM

H.P. Torque H.P. Torque H.P. Torque H.P. Torque H.P. Torque H.P. Torque H.P. Torque H.P. Torque H.P. Torque

36
40
42
44
48
54
56
60
64
72
80
84
88
96
112
120
128
144
160

.53
.60
.63
.67
.72
.83
.86
.92
.99
1.10
1.23
1.29
1.34
1.45
1.69
1.79
1.89
2.09
2.33

1.01
1.14
1.19
1.26
1.36
1.55
1.60
1.70
1.83
2.02
2.24
2.34
2.42
2.60
2.98
3.14
3.30
3.59
3.95

1279
1434
1498
1591
1719
1958
2021
2145
2307
2548
2828
2943
3056
3277
3757
3960
4155
4528
4980

1.86
2.07
2.16
2.28
2.44
2.75
2.83
2.98
3.19
3.47
3.81
3.94
4.06
4.31
4.83
5.04
5.24
5.60
6.07

1174
1305
1358
1437
1540
1735
1784
1880
2008
2188
2398
2481
2561
2713
3045
3176
3300
3532
3828

3.20
3.51
3.63
3.82
4.05
4.48
4.59
4.79
5.06
5.42
5.84
5.99
6.13
6.41
7.01
7.22
7.42
7.78
8.28

8 DIAMETRAL PITCH NON-METALLIC
No.
Teeth

25 RPM

50 RPM

100 RPM

884
961
989
1036
1088
1192
1215
1259
1323
1399
1492
1523
1553
1608
1731
1773
1811

6.14
6.55
6.69
6.95
7.19
7.72
7.83
8.01
8.33
8.64
9.06
9.18
9.30
9.50

645
688
703
730
756
811
822
842
875
908
952
965
976
998

7.25
7.66
7.78
8.05
8.27

300 RPM

600 RPM

25 RPM

50 RPM

176
192
233
283
334

.76
.88
.99
1.19
1.38

160
185
208
250
290

1.23
1.41
1.59
1.90
2.20

129
148
167
200
231

900 RPM

141⁄ 2° PRESSURE ANGLE
100 RPM

200 RPM

300 RPM

1.61
1.84
2.08
2.50
2.91

1200 RPM

112
129
146
175
204

1.96
2.25
2.54
3.06
3.57

103
118
133
160
187

1-1/2" FACE

600 RPM

946
1030
1340
1491
1648
1962
2273
2436
2860
3335
3761

.74
.80
1.04
1.15
1.27
1.51
1.74
1.86
2.18
2.53
2.84

928
1008
1308
1452
1603
1902
2196
2349
2745
3186
3576

1.42
1.54
1.98
2.19
2.41
2.84
3.26
3.48
4.03
4.64
5.17

893
968
1247
1381
1519
1792
2057
2194
2541
2924
3255

2.64
2.84
3.62
3.99
4.37
5.10
5.79
6.15
7.02
7.97
8.76

832 3.70 778
896 3.97 834
1142 5.01 1053
1257 5.49 1154
1376 5.98 1257
1606 6.92 1455
1825 7.81 1640
1937 8.25 1734
2212 9.32 1958
2512 10.48 2201
2761 11.41 2396

6.20
6.57
8.12
8.81
9.51
10.80
11.97
12.56
13.87
15.29
16.35

652
691
853
925
999
1135
1258
1319
1457
1606
1717

900 RPM

8.01
8.41
10.24
11.03
11.83
13.28
14.57
15.20
16.57
18.05
19.10

H.P. Torque

REFERENCE PAGE 12.
1800 RPM

2.60
3.00
3.40
4.13
4.86

91
105
119
144
170

561
589
717
773
828
930
1020
1065
1160
1264
1338

9.37
9.78
11.77
12.62
13.47
15.00
16.33
16.99
18.35

3600 RPM
H.P. Torque

4.39
4.71
5.84
7.22

77
82
102
126

REFERENCE PAGE 13.

1200 RPM

1800 RPM

H.P. Torque H.P. Torque H.P. Torque H.P. Torque H.P. Torque H.P. Torque H.P. Torque H.P. Torque H.P. Torque

.38
.41
.53
.59
.65
.78
.90
.97
1.13
1.32
1.49

3600 RPM

507
536
545
564
579

141⁄ 2° PRESSURE ANGLE 1-1/4" FACE

200 RPM

.56
.61
.74
.90
1.06

6 DIAMETRAL PITCH STEEL

11
12
14
15
16
18
20
21
24
27
30

4.21
4.57
4.71
4.93
5.18
5.67
5.78
5.99
6.30
6.66
7.10
7.25
7.39
7.65
8.24
8.44
8.62

H.P. Torque H.P. Torque H.P. Torque H.P. Torque H.P. Torque H.P. Torque H.P. Torque H.P. Torque H.P. Torque

16
18
20
24
28

No.
Teeth

1009
1107
1145
1204
1275
1413
1446
1508
1595
1707
1839
1887
1933
2019
2207
2275
2339
2452
2610

143
147
172
182
192

REFERENCE PAGE 13.

No.
Teeth

1339
1508
1579
1681
1824
2092
2164
2307
2492
2775
3107
3246
3384
3656
4256
4517
4773
5272
5868

3600 RPM
H.P. Torque

492
514
618
663
708
788
858
892
964

11.29
11.69
13.85
14.75
15.65
17.23

3600 RPM
H.P. Torque

395 14.19 249
409 14.51 254
485
517
548
603

Ratings are based on strength calculation. Basic static strength rating, or for hand operation of above gears is approximately 3 times the 100 RPM rating.
NOTE: Ratings to right of heavy line are not recommended, as pitch line velocity exceeds 1000 feet per minute.
They should be used for interpolation purposes only.
*Torque Ratings (Lb. Ins.).

Gear Catalog

43
®

SPUR GEARS
APPROXIMATE HORSEPOWER AND TORQUE* RATINGS
FOR CLASS I SERVICE (Service Factor = 1.0)
6 DIAMETRAL PITCH CAST IRON
25 RPM

50 RPM

100 RPM

141⁄ 2° PRESSURE ANGLE

1-1/2" FACE

200 RPM

900 RPM

300 RPM

600 RPM

REFERENCE PAGE 14.

1200 RPM

1800 RPM

No.
Teeth

H.P. Torque H.P. Torque H.P. Torque H.P. Torque H.P. Torque H.P. Torque H.P. Torque H.P. Torque H.P. Torque

32
33
36
40
42
48
54
60
64
66
72
84
96
108
120
144

.98 2470
1.01 2543
1.12 2813
1.25 3163
1.31 3310
1.51 3814
1.73 4364
1.90 4801
2.05 5177
2.11 5322
2.28 5750
2.66 6695
2.98 7510
3.35 8436
3.65 9205
4.23 10664

1.86
1.91
2.10
2.35
2.45
2.80
3.18
3.47
3.72
3.81
4.09
4.69
5.19
5.75
6.19
7.01

2341 3.36
2406 3.45
2650 3.77
2962 4.17
3090 4.33
3530 4.88
4005 5.46
4371 5.88
4688 6.26
4807 6.39
5153 6.77
5912 7.60
6538 8.24
7246 8.97
7806 9.50
8831 10.43

2120
2173
2375
2628
2728
3073
3440
3706
3944
4027
4267
4790
5193
5652
5987
6571

5 DIAMETRAL PITCH STEEL
No.
Teeth

11
12
14
15
16
18
20

25 RPM

50 RPM

24
25
30
35
40
45
50
55
60
70
80
100

100 RPM

11
12
14
15
16
18
20
22

7.32
7.46
7.99
8.62
8.85
9.64
10.47
10.97
11.48
11.62
12.03
12.96
13.56
14.31

1539
1567
1678
1811
1858
2025
2199
2305
2411
2442
2528
2724
2849
3006

10.38
10.51
11.09
11.76
11.97
12.75
13.59
14.00
14.50
14.62
14.94

200 RPM

300 RPM

.63
.68
.89
.99
1.09
1.30
1.50

1583
1723
2241
2491
2754
3275
3793

1.23
1.33
1.73
1.92
2.11
2.50
2.89

1546
1680
2176
2415
2664
3156
3640

2.35
2.54
3.26
3.61
3.97
4.67
5.35

1479
1600
2057
2275
2501
2942
3370

25 RPM

50 RPM

100 RPM

4.31
4.64
5.89
6.47
7.07
8.22
9.31

1360 5.99 1258
1462 6.40 1345
1855 8.04 1689
2039 8.79 1847
2227 9.56 2008
2590 11.01 2313
2934 12.36 2597

1-3/4" FACE

600 RPM

9.79
10.33
12.68
13.71
14.76
16.68
18.40

900 RPM

REFERENCE PAGE 14.

1200 RPM

1028
1085
1332
1441
1550
1752
1933

12.41
12.99
15.70
16.86
18.03
20.13
21.98

869
910
1099
1181
1262
1410
1539

14.33
14.91
17.82
19.05
20.27
22.46
24.34

141⁄ 2° PRESSURE ANGLE

1-3/4" FACE

200 RPM

900 RPM

300 RPM

1800 RPM

600 RPM

753
783
936
1000
1065
1179
1279

16.96
17.49
20.60
21.88

REFERENCE PAGE 14.

1200 RPM

1800 RPM

H.P. Torque H.P. Torque H.P. Torque H.P. Torque H.P. Torque H.P. Torque H.P. Torque

1.13
1.20
1.49
1.80
2.08

3.95
4.17
5.03
5.95
6.70

2.16
2.29
2.80
3.37
3.85

2.36 5947 4.33
2.60 6543 4.73
2.90 7321 5.25
3.14 7910 5.62
3.65 9213 6.45
4.17 10514 7.26
5.03 12671 8.52

2723
2885
3534
4246
4852

2487 6.73
2626 7.07
3168 8.32
3749 9.64
4224 10.65

5459 7.44 4689 11.60
5956 8.01 5051 12.29
6612 8.79 5539 13.27
7089 9.31 5870 13.86
8135 10.46 6592 15.16
9153 11.54 7270 16.35
10745 13.08 8241 17.84

25 RPM

50 RPM

2120 8.79 1847 12.69
2227 9.20 1933 13.19
2623 10.66 2238 14.80
3038 12.15 2554 16.44
3356 13.25 2783 17.53

1333 14.88 1042
1385 15.41 1079
1554 17.00 1191
1727
1841

3657
3874
4182
4368
4779
5152
5620

1945
2005
2112
2159

14.27
14.95
15.99
16.56
17.84
18.99

2997
3142
3359
3478
3748
3989

18.52
19.08
20.11
20.55

141⁄ 2° PRESSURE ANGLE
100 RPM

200 RPM

300 RPM

600 RPM

2" FACE
900 RPM

2810
3057
3971
4414
4876
5794
6703
7579

2.17
2.35
3.04
3.37
3.71
4.39
5.06
5.69

2730 4.10
2963 4.43
3831 5.67
4247 6.26
4680 6.87
5535 8.06
6373 9.21
7173 10.28

2584
2792
3577
3948
4332
5080
5802
6478

7.41
7.94
10.02
10.98
11.97
13.85
15.61
17.22

2334
2502
3158
3461
3772
4364
4920
5427

10.13
10.79
13.46
14.67
15.90
18.20
20.33
22.23

2128
2266
2827
3081
3339
3824
4271
4670

16.01
16.83
20.48
22.06
23.66
26.56
29.13
31.33

1682
1768
2151
2318
2485
2790
3060
3291

19.86
20.69
24.79
26.52
28.26
31.35
34.04
36.29

1391
1449
1736
1857
1979
2196
2384
2541

22.57
23.37
27.70
29.50
31.30

3600 RPM
H.P. Torque

REFERENCE PAGE 15.

1200 RPM

1800 RPM

H.P. Torque H.P. Torque H.P. Torque H.P. Torque H.P. Torque H.P. Torque H.P. Torque H.P. Torque H.P. Torque

1.11
1.21
1.58
1.75
1.93
2.30
2.66
3.01

3600 RPM
H.P. Torque

594
613
721
766

H.P. Torque H.P. Torque

2859
3034
3752
4548
5242

H.P. Torque

1090 12.06 844
1104
1165
1235
1257
1339
1427
1471
1523
1536
1569

H.P. Torque H.P. Torque H.P. Torque H.P. Torque H.P. Torque H.P. Torque H.P. Torque H.P. Torque H.P. Torque

4 DIAMETRAL PITCH STEEL
No.
Teeth

1783
1821
1967
2144
2211
2441
2683
2842
2993
3040
3175
3473
3680
3924
4083
4347

141⁄ 2° PRESSURE ANGLE

5 DIAMETRAL PITCH CAST IRON
No.
Teeth

5.66
5.78
6.24
6.80
7.02
7.75
8.52
9.02
9.50
9.65
10.08
11.02
11.68
12.45
12.96
13.79

3600 RPM

3600 RPM
H.P.

1185 26.14 915
1228 26.85 940
1455
1550
1644

Ratings are based on strength calculation. Basic static strength rating, or for hand operation of above gears is approximately 3 times the 100 RPM rating.
NOTE: Ratings to right of heavy line are not recommended, as pitch line velocity exceeds 1000 feet per minute.
They should be used for interpolation purposes only.
*Torque Ratings (Lb. Ins.).

44

Gear Catalog
®

Torque

SPUR GEARS
APPROXIMATE HORSEPOWER AND TORQUE* RATINGS
FOR CLASS I SERVICE (Service Factor = 1.0)
4 DIAMETRAL PITCH CAST IRON
No.
Teeth

24
28
30
32
36
40
42
44
48
54
56
60
64
72
80
84
88
96

25 RPM

50 RPM

100 RPM

11
12
14
15
16
18
20
21

200 RPM

2.00
2.43
2.62
2.86
3.25
3.64
3.80
4.04
4.36
4.97
5.13
5.44
5.86
6.47
7.18
7.47
7.76
8.32

5042
6129
6599
7211
8187
9177
9588
10181
10999
12530
12933
13727
14763
16305
18101
18838
19561
20970

3.77
4.54
4.87
5.30
5.96
6.63
6.90
7.29
7.82
8.81
9.06
9.55
10.20
11.11
12.18
12.60
13.00
13.78

4750
5723
6135
6675
7514
8354
8694
9195
9858
11104
11419
12034
12852
14005
15350
15877
16387
17365

6.75
8.02
8.53
9.22
10.24
11.24
11.63
12.22
12.95
14.35
14.68
15.32
16.20
17.33
18.68
19.17
19.63
20.50

4257
5053
5378
5811
6454
7085
7328
7703
8163
9045
9253
9652
10209
10923
11772
12079
12372
12922

24
30
36
42
48
54
60
72
84
96
108

600 RPM

25 RPM

50 RPM

11.19
12.99
13.69
14.65
15.98
17.24
17.69
18.46
19.28
20.94
21.29
21.94
22.95
24.07
25.48
25.93
26.35
27.13

3525
4094
4314
4616
5034
5433
5575
5816
6074
6598
6708
6915
7233
7585
8029
8170
8304
8548

14.32
16.38
17.14
18.22
19.64
20.97
21.42
22.24
23.02
24.72
25.04
25.65
26.66
27.65

3008
3441
3601
3829
4126
4406
4499
4672
4837
5193
5261
5388
5601
5810

19.88
22.16
22.92
24.11
25.49
26.77
27.12
27.97
28.58

2" FACE
900 RPM

1200 RPM

REFERENCE PAGE 15.
1800 RPM

100 RPM

200 RPM

300 RPM

3" FACE

7421 5.67 7146 10.56
8067 6.14 7743 11.37
10462 7.92 9979 14.49
11618 8.76 11046 15.96
12825 9.64 12156 17.47
15214 11.37 14333 20.38
17570 13.05 16454 23.16
18795 13.92 17549 24.59

6652
7167
9134
10056
11008
12845
14599
15495

25 RPM

50 RPM

100 RPM

18.55
19.80
24.79
27.06
29.38
33.75
37.80
39.84

5846
6239
7812
8528
9259
10637
11913
12556

24.82
26.30
32.48
35.24
38.03
43.20
47.89
50.24

5213
5524
6824
7403
7989
9076
10062
10554

600 RPM

37.47
39.14
47.09
50.49
53.89
60.00
65.33
67.96

3936
4111
4947
5304
5661
6303
6863
7139

141⁄ 2° PRESSURE ANGLE
200 RPM

300 RPM

900 RPM

1200 RPM

1800 RPM

600 RPM

45.15
46.74
55.40
59.01
62.60
68.93

13175
17164
21199
24721
28241
32043
34965
41223
47293
52300
57968

9.67
12.40
15.07
17.32
19.50
21.83
23.52
27.08
30.40
32.96
35.87

12195
15626
18998
21828
24586
27523
29651
34136
38322
41545
45212

16.84
21.03
24.96
28.06
30.99
34.06
36.08
40.30
44.08
46.71
49.81

10617
13251
15732
17687
19530
21466
22740
25402
27782
29437
31395

26.76
32.25
37.15
40.69
43.91
47.30
49.22
53.32
56.87
59.02
61.84

8433
10162
11707
12822
13838
14906
15509
16803
17923
18597
19486

33.30
39.23
44.37
47.87
51.00
54.35

3600 RPM
H.P. Torque

3162 50.30 2642
3273 51.78 2719
3880
4132
4383
4827

3" FACE
900 RPM

1200 RPM

REFERENCE PAGE 15.
1800 RPM

H.P. Torque H.P. Torque H.P. Torque H.P. Torque H.P. Torque H.P. Torque H.P. Torque H.P. Torque H.P. Torque

5.23
6.81
8.41
9.81
11.20
12.71
13.87
16.35
18.76
20.75
22.99

H.P. Torque

REFERENCE PAGE 15.

H.P. Torque H.P. Torque H.P. Torque H.P. Torque H.P. Torque H.P. Torque H.P. Torque H.P. Torque H.P. Torque

2.94
3.20
4.15
4.61
5.09
6.03
6.97
7.46

3600 RPM

2089 22.84 1600
2328
2408
2534
2677
2812
2849
2938
3002

141⁄ 2° PRESSURE ANGLE

3 DIAMETRAL PITCH CAST IRON
No.
Teeth

300 RPM

H.P. Torque H.P. Torque H.P. Torque H.P. Torque H.P. Torque H.P. Torque H.P. Torque H.P. Torque H.P. Torque

3 DIAMETRAL PITCH STEEL
No.
Teeth

141⁄ 2° PRESSURE ANGLE

3600 RPM
H.P. Torque

6995 44.05 4627
8241 50.07 5259
9322 55.08 5786
10056
10715
11417

Ratings are based on strength calculation. Basic static strength rating, or for hand operation of above gears is approximately 3 times the 100 RPM rating.
NOTE: Ratings to right of heavy line are not recommended, as pitch line velocity exceeds 1000 feet per minute.
They should be used for interpolation purposes only.
*Torque Ratings (Lb. Ins.).

Gear Catalog

45
®

SPUR GEARS
APPROXIMATE HORSEPOWER AND TORQUE* RATINGS
FOR CLASS I SERVICE (Service Factor = 1.0)
20 DIAMETRAL PITCH STEEL
No.
Teeth

12
14
15
16
18
20
24
25
30
35
40
45
50
60
70

25 RPM

50 RPM

20° PRESSURE ANGLE

100 RPM

200 RPM

300 RPM

1/2" FACE

600 RPM

900 RPM

REFERENCE PAGE 30.

1200 RPM

1800 RPM

H.P. Torque H.P. Torque H.P. Torque H.P. Torque H.P. Torque H.P. Torque H.P. Torque H.P. Torque H.P. Torque

H.P. Torque

.01
.02
.02
.02
.03
.03
.04
.04
.05
.07
.08
.09
.10
.12
.14

1.08
1.32
1.42
1.49
1.64
1.78
2.00
2.04
2.28
2.55
2.73

36.5
48.0
53.8
58.6
68.6
79.2
99.5
105
132
165
194
224
248
306
365

.03
.04
.04
.05
.05
.06
.08
.08
.10
.13
.15
.17
.19
.24
.28

36.3
47.7
53.3
58.1
67.9
78.4
98.3
103
130
162
190
219
242
296
352

.06
.07
.08
.09
.11
.12
.15
.16
.20
.25
.29
.33
.37
.44
.52

35.8
46.9
52.5
57.1
66.7
76.8
95.8
101
126
156
182
209
230
279
329

20 DIAMETRAL PITCH CAST IRON
25 RPM

50 RPM

100 RPM

.11
.14
.16
.18
.20
.23
.29
.30
.38
.46
.53
.61
.66
.79
.92

34.9 .16
45.6 .21
50.9 .23
55.2 .25
64.2 .29
73.7 .34
91.3 .41
95.6 .43
119
.53
145
.65
168
.75
192
.84
210
.92
250 1.08
291 1.24

34.1
44.3
49.3
53.5
62.0
70.8
87.1
91.1
112
136
157
177
192
227
260

.30
.39
.43
.46
.53
.60
.73
.76
.92
1.09
1.24
1.38
1.47
1.68
1.88

31.8
40.9
45.3
48.8
56.1
63.5
76.7
79.9
96.4
115
130
145
154
177
198

20° PRESSURE ANGLE
200 RPM

300 RPM

.42
.54
.60
.64
.73
.82
.98
1.02
1.21
1.42
1.58
1.74
1.84
2.07
2.28

29.7
37.9
41.9
44.9
51.2
57.5
68.5
71.1
84.5
99.4
111
122
129
145
160

.53
.67
.74
.79
.90
1.00
1.18
1.22
1.43
1.67
1.84
2.01
2.10
2.34
2.55

28.0
35.4
38.9
41.6
47.1
52.6
61.9
64.1
75.2
87.5
96.6
105
111
123
134

1/2" FACE

600 RPM

900 RPM

.71
.89
.97
1.04
1.16
1.28
1.48
1.53
1.76
2.02
2.20
2.37
2.46
2.69

25.0
31.2
34.1
36.3
40.6
44.9
51.9
53.5
61.6
70.6
77.0
83.0
86.1
94.0

1800 RPM

H.P. Torque H.P. Torque H.P. Torque H.P. Torque H.P. Torque H.P. Torque H.P. Torque H.P. Torque H.P. Torque

80
84
90
100
120
140
160
180
200

.10
.11
.11
.13
.15
.18
.21
.23
.25

256
269
287
317
387
447
520
579
637

.20
.20
.22
.24
.29
.33
.38
.42
.46

246
257
274
302
365
418
481
532
580

.36
.38
.40
.44
.52
.59
.66
.72
.78

228
237
252
275
327
369
419
457
492

16 DIAMETRAL PITCH STEEL

12
14
15
16
18
20
24
28
30
32
36
40
48
56
60
64
72
80

25 RPM

50 RPM

.63
.65
.69
.74
.86
.95
1.06
1.13
1.20

198
206
216
233
271
299
333
356
377

.84
.86
.90
.96
1.10
1.20
1.31
1.39
1.46

176
181
189
202
231
251
276
292
306

1.24
1.27
1.32
1.38
1.53
1.62
1.74
1.80
1.86

131
134
138
145
161
170
183
189
195

20° PRESSURE ANGLE

100 RPM

200 RPM

300 RPM

1.49
1.51
1.55
1.61
1.76
1.83

104
106
109
113
123
128

1.65
1.67
1.71
1.76

900 RPM

3600 RPM
H.P.

REFERENCE PAGE 31.

1200 RPM

1800 RPM

3600 RPM

H.P. Torque H.P. Torque H.P. Torque H.P. Torque H.P. Torque H.P. Torque H.P. Torque H.P. Torque H.P. Torque

H.P.

Torque

.03
.04
.05
.05
.06
.07
.09
.11
.12
.13
.16
.18
.22
.26
.28
.31
.35
.39

2.26
2.73
2.93
3.07
3.35
3.62
4.02
4.40
4.55
4.79
5.09
5.37

39.5
47.7
51.3
53.8
58.6
63.3
70.4
77.0
79.7
83.9
89.1
94.1

85.5
112
126
136
160
185
233
283
308
340
395
452
556
665
711
779
872
991

.07
.09
.10
.11
.13
.14
.18
.22
.24
.26
.31
.35
.43
.51
.54
.59
.66
.75

84.7
111
124
135
158
183
229
278
302
333
385
440
539
642
684
748
833
943

.13
.17
.19
.21
.25
.28
.35
.43
.46
.51
.58
.66
.81
.95
1.01
1.10
1.21
1.36

83.4
109
122
133
155
178
222
268
291
320
368
418
508
599
636
692
764
858

.26
.33
.37
.40
.47
.54
.66
.79
.86
.94
1.07
1.21
1.44
1.68
1.77
1.91
2.08
2.31

80.9
105
117
127
148
169
209
250
270
296
338
381
455
529
557
602
656
728

.37
.48
.54
.58
.67
.77
.94
1.12
1.20
1.31
1.49
1.66
1.96
2.25
2.36
2.54
2.74
3.01

78.4
102
113
122
142
161
198
235
253
275
312
349
412
474
496
533
575
632

.69
.88
.97
1.04
1.19
1.35
1.62
1.88
2.01
2.17
2.42
2.67
3.06
3.43
3.55
3.78
4.00
4.31

72.0
92.2
102
110
125
141
170
198
211
228
254
280
322
360
373
397
420
653

.95
1.20
1.33
1.42
1.61
1.80
2.12
2.44
2.59
2.78
3.06
3.34
3.76
4.15
4.27
4.51
4.72
5.04

66.5
84.4
92.8
99.4
113
126
149
171
181
195
215
234
264
291
299
316
330
353

1.18
1.48
1.62
1.73
1.94
2.16
2.52
2.87
3.02
3.23
3.53
3.82
4.25
4.64
4.75
5.00

61.8
77.7
85.2
90.8
102
113
132
151
159
170
186
201
223
244
250
263

1.55
1.92
2.09
2.21
2.46
2.70
3.10
3.47
3.63
3.86
4.17
4.47
4.88

54.2
67.2
73.1
77.5
86.2
94.7
108
122
127
135
146
156
171

Ratings are based on strength calculation. Basic static strength rating, or for hand operation of above gears is approximately 3 times the 100 RPM rating.
NOTE: Ratings to right of heavy line are not recommended, as pitch line velocity exceeds 1000 feet per minute.
They should be used for interpolation purposes only.
*Torque Ratings (Lb. Ins.).

46

Torque

86.5
87.8
89.7
92.4

3/4" FACE

600 RPM

18.9
23.0
24.9
26.2
28.7
31.2
34.9
35.8
40.0
44.7
47.8

REFERENCE PAGE 30.
1200 RPM

No.
Teeth

No.
Teeth

3600 RPM

Gear Catalog
®

SPUR GEARS
APPROXIMATE HORSEPOWER AND TORQUE* RATINGS
FOR CLASS I SERVICE (Service Factor = 1.0)
16 DIAMETRAL PITCH CAST IRON
25 RPM

50 RPM

100 RPM

20° PRESSURE ANGLE
200 RPM

300 RPM

3/4" FACE

600 RPM

900 RPM

REFERENCE PAGE 31.
1200 RPM

1800 RPM

No.
Teeth

H.P. Torque H.P. Torque H.P. Torque H.P. Torque H.P. Torque H.P. Torque H.P. Torque H.P. Torque H.P. Torque

96
128
144
160
192

.28
.38
.42
.47
.56

707 .53 666
949 .70 879
1057 .77 970
1195 .86 1088
1406 1.00 1260

.95 597
1.21 765
1.32 833
1.46 923
1.66 1044

12 DIAMETRAL PITCH STEEL
No.
Teeth

12
13
14
15
16
18
20
21
24
28
30
36
42
48
54

25 RPM

50 RPM

1.57
1.93
2.06
2.25
2.46

494
608
650
707
777

2.01
2.40
2.54
2.73
2.94

421
504
533
574
618

2.79
3.17
3.29
3.49
3.65

293
333
346
366
384

3.20
3.56

20° PRESSURE ANGLE

100 RPM

200 RPM

300 RPM

224
249

1" FACE

600 RPM

900 RPM

REFERENCE PAGE 31.

1200 RPM

1800 RPM

H.P. Torque H.P. Torque H.P. Torque H.P. Torque H.P. Torque H.P. Torque H.P. Torque H.P. Torque H.P. Torque

.08
.09
.11
.12
.13
.15
.17
.19
.22
.26
.29
.37
.44
.52
.60

202 .16 200
233 .18 230
265 .21 262
297 .23 293
323 .25 319
379 .30 373
437 .34 429
468 .36 459
548 .43 537
667 .52 651
720 .56 707
928 .71 899
1112 .85 1073
1304 .99 1252
1505 1.14 1437

.31
196
.36
225
.41
256
.45
285
.49
310
.57
361
.66
415
.70
443
.82
515
.99
621
1.07
673
1.34
847
1.59 1001
1.84 1159
2.09 1319

12 DIAMETRAL PITCH CAST IRON
25 RPM

50 RPM

100 RPM

.60 188
.86
.68 215
.98
.77 244 1.11
.86 271 1.23
.93 294 1.33
1.08 340 1.53
1.23 389 1.74
1.31 413 1.84
1.51 477 2.11
1.80 568 2.49
1.94 612 2.68
2.41 759 3.27
2.81 884 3.77
3.20 1009 4.25
3.60 1133 4.73

181
206
233
259
279
322
365
388
444
524
562
688
792
893
993

1.54
1.75
1.96
2.16
2.31
2.63
2.95
3.11
3.50
4.04
4.29
5.11
5.73
6.33
6.90

162
183
206
227
243
276
310
327
368
425
451
537
602
665
724

20° PRESSURE ANGLE
200 RPM

300 RPM

2.09
2.36
2.63
2.88
3.07
3.46
3.84
4.03
4.48
5.10
5.37
6.28
6.94
7.56
8.14

147
165
184
202
215
242
269
282
314
357
376
440
486
529
570

2.55
2.86
3.18
3.46
3.68
4.10
4.52
4.73
5.21
5.86
6.15
7.09
7.76
8.37

134
150
167
182
193
215
238
249
274
308
323
373
407
440

1" FACE

600 RPM

900 RPM

3.27
3.63
4.00
4.34
4.58
5.04
5.50
5.73
6.22
6.89
7.19
8.15

114
127
140
152
160
177
193
201
218
241
252
285

1800 RPM

H.P. Torque H.P. Torque H.P. Torque H.P. Torque H.P. Torque H.P. Torque H.P. Torque H.P. Torque H.P. Torque

60
66
72
84
96
108
120
132
144
168
192
216

.40
.45
.48
.58
.65
.75
.82
.89
.97
1.13
1.27
1.41

.75
.84
.91
1.07
1.21
1.37
1.49
1.61
1.73
2.00
2.22
2.42

949
1064
1150
1354
1519
1725
1882
2034
2181
2526
2794
3045

1.37
1.53
1.64
1.90
2.10
2.35
2.53
2.70
2.87
3.25
3.52
3.77

864
961
1031
1196
1322
1482
1596
1704
1806
2047
2219
2375

2.32
2.56
2.71
3.07
3.33
3.67
3.88
4.08
4.26
4.71
4.99
5.23

733
805
853
969
1050
1156
1224
1287
1344
1484
1573
1649

3.03
3.30
3.47
3.88
4.15
4.51
4.73
4.92
5.09
5.54
5.80
6.01

636
693
728
814
871
947
993
1033
1070
1164
1218
1263

4.34
4.65
4.81
5.24
5.49
5.85
6.03
6.19
6.32

456
488
506
551
576
615
634
650
664

5.07
5.38
5.53

3600 RPM
H.P. Torque

4.53
4.97
5.42
5.80
6.05
6.55
7.02
7.26
7.72

79.4
87.1
94.8
102.0
106.0
115.0
123.0
127.0
135.0

REFERENCE PAGE 32.
1200 RPM

No.
Teeth

998
1125
1221
1450
1641
1879
2068
2252
2433
2861
3209
3545

3600 RPM
H.P. Torque

3600 RPM
H.P.

Torque

355
377
387

Ratings are based on strength calculation. Basic static strength rating, or for hand operation of above gears is approximately 3 times the 100 RPM rating.
NOTE: Ratings to right of heavy line are not recommended, as pitch line velocity exceeds 1000 feet per minute.
They should be used for interpolation purposes only.
*Torque Ratings (Lb. Ins.).

Gear Catalog

47
®

SPUR GEARS
APPROXIMATE HORSEPOWER AND TORQUE* RATINGS
FOR CLASS I SERVICE (Service Factor = 1.0)
10 DIAMETRAL PITCH STEEL
No.
Teeth

12
14
15
16
18
20
24
25
28
30
35
40
45
48
50

25 RPM

50 RPM

20° PRESSURE ANGLE

100 RPM

200 RPM

300 RPM

1-1/4" FACE

600 RPM

900 RPM

REFERENCE PAGE 32.

1200 RPM

1800 RPM

H.P. Torque H.P. Torque H.P. Torque H.P. Torque H.P. Torque H.P. Torque H.P. Torque H.P. Torque H.P. Torque

.14
.19
.21
.23
.27
.31
.39
.41
.47
.52
.64
.75
.87
.92
.96

363
477
533
580
679
784
983
1032
1195
1300
1615
1896
2190
2328
2420

.28
.37
.42
.45
.53
.61
.76
.80
.92
1.00
1.24
1.44
1.66
1.76
1.83

358
469
525
571
667
768
958
1005
1161
1260
1558
1820
2092
2218
2301

.55
.72
.81
.88
1.02
1.17
1.45
1.52
1.74
1.88
2.31
2.67
3.05
3.21
3.32

349
456
509
552
642
737
913
956
1097
1187
1454
1685
1920
2026
2095

10 DIAMETRAL PITCH CAST IRON
25 RPM

50 RPM

100 RPM

1.06
1.37
1.52
1.64
1.90
2.16
2.65
2.76
3.14
3.38
4.08
4.65
5.23
5.48
5.64

333
431
479
518
599
682
834
870
990
1064
1284
1467
1649
1727
1777

1.51
1.95
2.16
2.32
2.67
3.02
3.65
3.80
4.29
4.59
5.47
6.18
6.88
7.16
7.34

318 2.66 280 3.57
409 3.37 354 4.46
453 3.70 389 4.87
488 3.96 416 5.18
561 4.48 471 5.79
635 5.00 526 6.41
767 5.89 619 7.41
799 6.10 641 7.64
901 6.76 710 8.37
964 7.16 752 8.80
1150 8.33 875 10.08
1299 9.20 966 10.99
1445 10.04 1054 11.85
1504 10.33 1085 12.12
1542 10.52 1105 12.29

20° PRESSURE ANGLE
200 RPM

300 RPM

250 4.30 226 5.40 189 7.27
312 5.31 279 6.58 230 8.63
341 5.78 303 7.10 249 9.22
363 6.12 321 7.47 262 9.60
406 6.79 356 8.19 287 10.33
449 7.45 391 8.90 311 11.04
519 8.50 447 9.98 349
535 8.74 459 10.21 358
586 9.50 499 10.99 385
616 9.94 522 11.42 400
706 11.27 592
770 12.17 639
830
849
861

1-1/4" FACE

600 RPM

900 RPM

1800 RPM

H.P. Torque H.P. Torque H.P. Torque H.P. Torque H.P. Torque H.P. Torque H.P. Torque H.P. Torque H.P. Torque

55
60
70
80
90
100
120
140
160
200

.65
.71
.84
.98
1.09
1.20
1.45
1.66
1.91
2.30

1.23
1.33
1.57
1.81
2.00
2.18
2.59
2.93
3.32
3.90

1550
1675
1974
2279
2517
2746
3271
3688
4191
4920

2.22
2.38
2.77
3.15
3.43
3.70
4.30
4.74
5.28
5.99

1400
1501
1743
1984
2162
2329
2709
2989
3329
3773

8 DIAMETRAL PITCH STEEL
No.
Teeth

12
14
15
16
18
20
22
24
28
32
36

25 RPM

50 RPM

3.72
3.94
4.48
5.00
5.35
5.67
6.40
6.88
7.49
8.17

1173
1243
1413
1576
1686
1786
2016
2167
2359
2573

4.80
5.05
5.65
6.22
6.58
6.89
7.64
8.09
8.69

1009
1061
1187
1307
1382
1448
1605
1699
1826

6.77
7.01
7.65
8.23
8.54
8.80
9.48

711
737
803
865
897
924
996

20° PRESSURE ANGLE
100 RPM

200 RPM

300 RPM

7.84
8.06

678
890
996
1084
1268
1462
1651
1831
2224
2664
3082

.53
.69
.77
.84
.98
1.13
1.27
1.41
1.70
2.03
2.34

667
874
976
1061
1238
1424
1604
1775
2145
2557
2944

1.03
1.34
1.49
1.62
1.88
2.15
2.41
2.65
3.18
3.76
4.29

647
843
939
1018
1183
1354
1518
1672
2003
2367
2703

1.93
2.50
2.77
2.99
3.44
3.91
4.35
4.75
5.61
6.54
7.37

609
787
873
943
1086
1233
1371
1498
1768
2060
2321

2.74
3.51
3.88
4.18
4.77
5.39
5.95
6.46
7.54
8.68
9.68

576
738
816
877
1003
1131
1250
1357
1583
1824
2034

4.71
5.92
6.49
6.92
7.78
8.64
9.41
10.08
11.47
12.92
14.13

495
622
681
727
817
908
989
1059
1204
1358
1484

3600 RPM
H.P. Torque

900 RPM

REFERENCE PAGE 33.

1200 RPM

1800 RPM

H.P. Torque H.P. Torque H.P. Torque H.P. Torque H.P. Torque H.P. Torque H.P. Torque H.P. Torque H.P. Torque

.27
.35
.39
.43
.50
.58
.66
.73
.88
1.06
1.22

6.19 434
7.68 537
8.35 585
8.85 620
9.84 689
10.82 758
11.67 817
12.39 868
13.88 972
15.44 1081
16.68 1168

7.35
9.01
9.76
10.30
11.35
12.38
13.27
14.00
15.51
17.10

386
473
513
541
596
650
698
735
815
898

9.03
10.91
11.73
12.30
13.40
14.47
15.36
16.08

316
382
411
431
469
507
538
563

3600 RPM
H.P.

Torque

11.72
13.81
14.70

205
242
257

Ratings are based on strength calculation. Basic static strength rating, or for hand operation of above gears is approximately 3 times the 100 RPM rating.
NOTE: Ratings to right of heavy line are not recommended, as pitch line velocity exceeds 1000 feet per minute.
They should be used for interpolation purposes only.
*Torque Ratings (Lb. Ins.).

48

Gear Catalog
®

127
151
161
168
181
193

549
564

1-1/2" FACE

600 RPM

Torque

REFERENCE PAGE 32.

1200 RPM

No.
Teeth

1638
1778
2114
2462
2742
3016
3650
4177
4814
5802

3600 RPM
H.P.

SPUR GEARS
APPROXIMATE HORSEPOWER AND TORQUE* RATINGS
FOR CLASS I SERVICE (Service Factor = 1.0)
8 DIAMETRAL PITCH CAST IRON
25 RPM

50 RPM

100 RPM

20° PRESSURE ANGLE
200 RPM

300 RPM

1-1/2" FACE

600 RPM

900 RPM

REFERENCE PAGE 33.

1200 RPM

1800 RPM

No.
Teeth

H.P. Torque H.P. Torque H.P. Torque H.P. Torque H.P. Torque H.P. Torque H.P. Torque H.P. Torque H.P. Torque

40
44
48
56
60
64
72
80
88
96
112
120
128

.84
.95
1.03
1.22
1.30
1.42
1.59
1.79
1.96
2.11
2.49
2.64
2.79

2111
2384
2587
3080
3283
3588
3997
4525
4929
5325
6266
6651
7028

1.59
1.79
1.93
2.28
2.42
2.64
2.91
3.27
3.53
3.79
4.39
4.63
4.85

2007
2256
2437
2876
3052
3322
3669
4119
4451
4772
5533
5830
6118

2.90
3.23
3.47
4.03
4.25
4.59
5.00
5.54
5.92
6.27
7.11
7.42
7.71

1928 4.92 1550 6.40
2038 5.42 1707 6.99
2184 5.74 1809 7.35
2539 6.53 2057 8.23
2676 6.81 2146 8.53
2892 7.29 2297 9.07
3151 7.80 2458 9.59
3493 8.50 2679 10.34
3729 8.93 2816 10.76
3952 9.33 2941 11.15
4483 10.31 3250 12.13
4677 10.63 3351 12.43
4860 10.93 3444 12.69

6 DIAMETRAL PITCH STEEL
No.
Teeth

12
14
15
16
18
21
24
27
30

25 RPM

50 RPM

1345
1469
1543
1729
1792
1905
2014
2173
2262
2341
2549
2610
2667

9.18
9.86
10.20
11.14
11.40
12.00
12.44
13.20
13.54
13.83

964 10.72 751
1035 11.41 799
1072 11.72 821
1170
1198
1260
1307
1386
1422
1453

20° PRESSURE ANGLE
100 RPM

200 RPM

300 RPM

2" FACE

600 RPM

900 RPM

REFERENCE PAGE 33 & 34.

1200 RPM

1800 RPM

H.P. Torque H.P. Torque H.P. Torque H.P. Torque H.P. Torque H.P. Torque H.P. Torque H.P. Torque H.P. Torque

.63
.83
.93
1.01
1.18
1.46
1.70
1.98
2.25

1559
2097
2345
2551
2981
3671
4294
4986
5660

1.24
1.62
1.81
1.97
2.29
2.81
3.27
3.78
4.27

1565
2046
2284
2480
2889
3541
4122
4763
5381

2.38
3.10
3.45
3.73
4.32
5.25
6.05
6.94
7.77

1502 4.41 1391 6.16
1951 5.67 1786 7.84
2171 6.27 1977 8.64
2351 6.76 2129 9.26
2722 7.74 2440 10.52
3306 9.26 2919 12.44
3815 10.54 3322 14.00
4372 11.92 3755 15.66
4899 13.18 4155 17.17

6 DIAMETRAL PITCH CAST IRON
25 RPM

50 RPM

100 RPM

1294
1647
1814
1945
2210
2613
2941
3241
3607

10.20
12.70
13.85
14.71
16.41
18.93
20.83
22.85
24.60

1072
1334
1455
1545
1724
1988
2188
2400
2584

20° PRESSURE ANGLE
200 RPM

300 RPM

13.06
16.02
17.35
18.30
20.18
22.91
24.88
26.98
28.75

915
1122
1215
1282
1413
1605
1743
1889
2013

15.19
18.42
19.85
20.85
22.79
25.61
27.56

798
967
1043
1095
1197
1345
1448

2" FACE

600 RPM

900 RPM

18.14
21.67
23.20
24.21
26.18

REFERENCE PAGE 34.
1200 RPM

1800 RPM

H.P. Torque H.P. Torque H.P. Torque H.P. Torque H.P. Torque H.P. Torque H.P. Torque H.P. Torque H.P. Torque

33
36
42
48
54
60
66
72
84
96
108
120

1.53
1.71
2.04
2.38
2.74
3.01
3.38
3.65
4.30
4.82
5.47
5.97

2.89
3.23
3.81
4.41
5.02
5.48
6.10
6.54
7.59
8.39
9.40
10.13

3641
4066
4807
5563
6333
6910
7691
8245
9566
10579
11583
12770

5.22
5.78
6.73
7.68
8.63
9.30
10.22
10.83
12.30
13.33
14.67
15.54

3288
3644
4244
4843
5440
5860
6443
6827
7752
8404
9245
9793

8.74
9.58
10.91
12.21
13.46
14.26
15.44
16.12
17.83
18.90
20.37
21.20

2755
3018
3439
3847
4243
4494
4864
5080
5620
5955
6420
6680

11.28
12.26
13.76
15.19
16.55
17.35
18.60
19.26
20.98
21.95
23.41

2370
2575
2891
3191
3477
3645
3907
4045
4407
4611
4917

15.90
17.02
18.62
20.09
21.48
22.14
23.39
23.90

3600 RPM
H.P. Torque

635
759
812
848
917

No.
Teeth

3847
4316
5148
6009
6899
7591
8515
9200
10835
12152
13800
15059

3600 RPM
H.P. Torque

3600 RPM
H.P. Torque

1670 18.42 1290
1788 19.56 1370
1955
2111
2256
2326
2457
2511

Ratings are based on strength calculation. Basic static strength rating, or for hand operation of above gears is approximately 3 times the 100 RPM rating.
NOTE: Ratings to right of heavy line are not recommended, as pitch line velocity exceeds 1000 feet per minute.
They should be used for interpolation purposes only.
*Torque Ratings (Lb. Ins.).

Gear Catalog

49
®

SPUR GEARS
APPROXIMATE HORSEPOWER AND TORQUE* RATINGS
FOR CLASS I SERVICE (Service Factor = 1.0)
5 DIAMETRAL PITCH STEEL
No.
Teeth

12
14
15
16
18
20

25 RPM

50 RPM

20° PRESSURE ANGLE
100 RPM

24
25
28
30
35
40
45
50
60
70
80
100
110
120
140
160
180

300 RPM

600 RPM

900 RPM

REFERENCE PAGE 34.

1200 RPM

1800 RPM

H.P. Torque H.P. Torque H.P. Torque H.P. Torque H.P. Torque H.P. Torque H.P. Torque H.P. Torque H.P. Torque

1.14
1.49
1.67
1.81
2.12
2.44

2865
3756
4198
4565
5332
6141

2.22
2.89
3.23
3.50
4.08
4.68

2794
3647
4069
4416
5138
5894

4.22
5.47
6.08
6.58
7.60
8.66

2662
3449
3833
4146
4789
5456

5 DIAMETRAL PITCH CAST IRON
No.
Teeth

200 RPM

2-1/2" FACE

25 RPM

50 RPM

100 RPM

7.71
9.87
10.90
11.72
13.38
15.07

2431
3110
3435
3693
4216
4750

10.65
13.48
14.81
15.85
17.92
20.02

2237
2832
3112
3329
3766
4205

17.19
21.25
23.11
24.47
27.15
29.79

1805
2233
2427
2570
2852
3129

20° PRESSURE ANGLE
200 RPM

300 RPM

21.61
26.31
28.41
29.89
32.77
35.58

1513
1843
1990
2093
2295
2492

24.80
29.87
32.09
33.61
36.56
39.41

1302 29.09 1019
1569 34.53 1209
1686 36.87 1291
1765
1920
2070

2-1/2" FACE

600 RPM

900 RPM

REFERENCE PAGE 34.

1200 RPM

1800 RPM

H.P. Torque H.P. Torque H.P. Torque H.P. Torque H.P. Torque H.P. Torque H.P. Torque H.P. Torque H.P. Torque

1.82
1.91
2.21
2.40
2.97
3.47
3.98
4.38
5.32
6.27
7.23
8.71
9.68
10.38
11.70
13.30
14.49

4599
4826
5571
6050
7477
8737
10040
11046
13399
15794
18229
21969
24409
26168
29508
33526
36534

3.48
3.64
4.18
4.52
5.54
6.42
7.31
7.98
9.53
11.06
12.59
14.78
16.22
17.19
18.97
21.13
22.61

4381
4588
5267
5700
6982
8087
9216
10056
12008
13945
15869
18630
20449
21669
23910
26631
28495

6.35
6.63
7.54
8.10
9.78
11.17
12.56
13.53
15.78
17.93
20.00
22.67
24.50
25.58
27.50
29.94
31.40

4002
4177
4750
5108
6164
7040
7916
8528
9944
11300
12605
14288
15439
16125
17334
18870
19787

10.82
11.24
12.60
13.42
15.85
17.75
19.59
20.75
23.48
26.00
28.34
30.92
32.88
33.85
35.49
37.83
38.97

3411
3542
3970
4230
4995
5593
6174
6540
7400
8192
8932
9745
10362
10666
11182
11921
12281

14.15
14.64
16.23
17.18
19.98
22.08
24.09
25.25
28.05
30.58
32.92

2972
3075
3410
3609
4199
4639
5060
5304
5892
6425
6916

20.41
20.97
22.81
23.86
27.04
29.21
31.26
32.22
34.81

2144
2203
2396
2506
2840
3068
3284
3384
3657

23.95
24.51
26.37
27.41

3600 RPM
H.P. Torque

3600 RPM
H.P. Torque

1677
1716
1847
1920

Ratings are based on strength calculation. Basic static strength rating, or for hand operation of above gears is approximately 3 times the 100 RPM rating.
NOTE: Ratings to right of heavy line are not recommended, as pitch line velocity exceeds 1000 feet per minute.
They should be used for interpolation purposes only.
*Torque Ratings (Lb. Ins.).

STAINLESS STEEL GEAR GAUGE SET
14-1/2° and 20° PRESSURE ANGLES
This handy, steel gear gauge set consists of 16 leaves — 24 gauges — to measure both 14-1/2° and 20° pressure angle tooth form, in diametral pitch sizes 64,
48, 32, 24, 20, 16, 12, 10, 8, 6, 5 and 4. Pitch sizes 8, 6, 5 and 4 both 14-1/2°
and 20° are cut on individual leaves. Pitch sizes 64 through 10 inclusive, have
both 14-1/2° and 20° pressure angles on a single leaf.

SOLD ONLY AS A COMPLETE SET
ORDER BY CATALOG NUMBER OR ITEM CODE

50

Gear Catalog
®

Catalog Number

Item Code

Gear Gauge

06000

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