Threading
| PROBLEMS | CAUSES | SOLUTIONS |
| SHALLOW THREAD PROFILE | Incorrect set-up | Adjust center height |
| Worn insert | Replace insert | |
| POOR TOOL LIFE | Excessive cutting speed | Decrease speed (SFM) |
| Select wear resistant grade | ||
| Apply coolant | ||
| DEFORMATION | Excessive cutting temperature | Decrease speed (SFM) |
| Select wear resistant grade | ||
| Apply coolant | ||
| Reduce DOC on first pass | ||
| UNEVEN FLANK WEAR | Incorrect process | Decrease number of passes |
| Change in-feed angle | ||
| EXCESSIVE FLANK WEAR | Excessive cutting speed | Decrease speed (SFM) |
| Select wear resistant grade | ||
| Incorrect process | Change in-feed angle | |
| TRAILING EDGE CHIPPING | Excessive cutting force | Select tougher grade |
| Change in-feed angle | ||
| LEADING EDGE CHIPPING | Excessive cutting force | Reduce DOC on first pass |
| Select tougher grade | ||
| BROKEN NOSE | Excessive cutting force | Reduce DOC on first pass |
| Change in-feed angle | ||
| Adjust center height | ||
| Select tougher grade | ||
| BUILT-UP EDGE | Poor shearing action | Increase speed (SFM) |
| Decrease number of passes | ||
| Apply coolant | ||
| Select positive rake angle | ||
| Use PVD coated insert | ||
| CHATTER | Tool deflection | Reduce tool overhang |
| Increase speed (SFM) | ||
| Incorrect set-up | Adjust center height | |
| Check insert for movement & reseat | ||
| CREST BURR OR TORN FINISH | Incorrect process | Use topping insert |
| Change in-feed angle | ||