| PROBLEM | SUGGESTIONS |
| Chipping | Check part rigidity Verify speeds and feeds Confirm concentricity of end mill in holder Decrease ramp angle or slow down approach Check coolant flow and location |
Breakage | Decrease feed rate Decrease axial depth Use shorter tool or stub holder Resharpen earlier |
Chattering | Too light of a cut Leave more stock for finish pass Decrease axial depth Adjust speeds and feeds |
Part finish | Confirm concentricity of end mill in holder Decrease feed rate Use different style of end mill Check coolant flow and location Check part rigidity |
Burr | Change end mill sooner / too much wear Verify speeds and feeds Increase spindle speed Decrease feed rate Use different style of end mill |
Excessive noise | Check part rigidity Verify speeds and feeds Too light of a cut Confirm concentricity of end mill in holder |
Tool life | Work material harder than expected Verify speeds and feeds Recutting chips Too light of a cut Use different style of end mill |
Wear | Speed too fast Too light of a feed Confirm concentricity of end mill in holder Verify speeds and feeds |
Chip welding | Verify speeds and feeds Check coolant flow and location Use different style of end mill |
Chip packing | Check coolant flow and location Decrease axial depth Adjust speeds and feeds Use different style of end mill |
Wall not straight | Decrease feed rate Decrease axial depth Use shorter tool or stub holder Use different style of end mill |
-Troubleshooting for End Mills
