Thread surface not according to requirements
BACK
| Possible causes | Solution |
| burrs | remove burrs |
| cutting edge geometry (chamfer lead, rake-, chamfer-, spiral point angle) not retained | - observe technical specifications when regrinding. - observe regrinding instruction |
| peak-to-valley height of the reground tap too large | - regrind again or apply new tool. - observe max. regrinding limits. |
| cold welding at the flanks | remove cold welding marks |