| Cause | Solution |
| Bending, deformation, sliding | Increase the rigidity of tool and machine tool, increase the rigidity of workpiece and jig |
| Lip Relief Angle is too small | Regrinding Lip Relief Angle |
| High Stock Removal | To reduce Stock Removal |
| Bit wear | Use drill bit grinder to grinding |
| Blocking of chips | Re-select the alloy bit (chip groove, helix Angle);
Re-select machining method (adjustment of feed rate, step-step method, etc.) |
| Poor cutting | Increase the rigidity of tools and machine tools
Increase the rigidity of workpiece and jig Predrilling center hole The cutting plane is first adjusted or processed into a horizontal plane with a guide sleeve |
