Economy kits Economy kits In hard and abrasive drilling condition the external parts of DTH hammer is wearing out before the internal parts reaches their fatigue limits. In these conditions the E-kit can serve as a tool to reduce the total drilling cost. With the E-kit the hammer can be rebuilt and the internal part re-used for another run. The cost saving can be substantial as the cost for an E-kit is only 50% of a new hammer. An E-kit contains all the needed parts for a rebuild and will ease the logistic constrains as all needed parts can be ordered under one product number. A rule of thumb for use of E-kits:
Economy kits Product No.
Product code
Description
89000957
9703-10-04-040
COP 34 Std
89000812
9703-03-04-040
COP 34 Std
Notes
Rock formation
Hammer life
Action
Highly abrasive
< 5000 m
Use E-kit to rebuild the hammer 1-2 times
Medium abrasive
5-10 000 m
Consider E-kit to rebuild the hammer 1 time
None abrasive
>10 000 m
Rebuilding not recommended, risk that internal parts might fail before E-kit worn out