Tool life insufficient

Tool life insufficient
Possible causes Solution
cutting edge geometry (chamfer lead, rake-, chamfer-, spiral point angle) not retained - regrind again or apply new tool.
- observe max. regrinding limits.
loss of tap hardness due to heat development during the regrinding process - check quality of grinding wheel
- check coolant supply
loss of coating - recoat
- check coating of the material to be machined