| Question | Solution | |
| Oversized threads | Incorrect tap selected for application | See application sheet |
| Incorrect axial feed | Make sure to control the feed rate. If possible, use a tool holder for simultaneous tapping | |
| Cutting speed error | See recommended values | |
| Tolerance error | Choose a tap with a lower tolerance | |
| Undersized thread | Tap wear | Smoother tap |
| The bottom hole of the tap is too small | Check out drilling recommendations | |
| Material shrinks after tapping | Increase drill diameter | |
| Tap tolerance error | Choose a tap with a higher tolerance | |
| The cutting blade is slightly chipped | Incorrect tap selected for application | View tool selection |
| Incorrect or insufficient lubricant | Use appropriate emulsion or oil | |
| The tap hits the bottom of the hole | Increase drilling depth or reduce thread depth | |
| Cutting jam | View tool selection | |
| Case hardening in drilling | Check out drilling recommendations | |
| fracture | Torque too high | Use a tap holder with a torque setting |
| Tap wear | Replace tap | |
| Incorrect or insufficient lubricant | Use appropriate emulsion or oil | |
| The tap hits the bottom of the hole | Increase drilling depth or reduce thread depth | |
| Cutting speed error | See recommended values | |
| Bird's nest chips are produced around the tool | Check tool selection | |
| The bottom hole of the tap is too small | Check out drilling recommendations | |
| rapid wear | Incorrect tap type selected for application | See tap selection |
| Incorrect or insufficient lubricant | Use appropriate emulsion or oil | |
| Cutting speed too high | See recommended values | |
| Process (surface) hardening in drilling | Check drilling recommendations for drill bit wear | |
| The bottom hole of the tap is too small | Check out drilling recommendations | |
| built-up edge | Incorrect or insufficient lubricant | Use appropriate emulsion or oil |
| Tap wear | Replace tap | |
| Cutting speed error | See recommended values | |
| Incorrect tap type selected for application | See tap selection | |
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