| PROBLEM | SUGGESTIONS |
| Chipping on point | Reduce feed rate Check part rigidity Constant feed rate Verify speeds and feeds Minimum drill overhang Reduce number of peck cycles |
| Chipping on O.D. | Reduce feed rate Confirm concentricity of drill in holder Check coolant flow and location Check part rigidity |
Breakage | Reduce feed rate Check your program-is ‘R’ clearing the part Check coolant flow and location Check part rigidity |
Heavy wear on corners | Increase feed rate Check coolant flow and location Confirm concentricity of drill in holder Check part rigidity |
Long, stringy chips | Increase feed rate Increase hone relief Constant feed rate Increase number of peck cycles |
Excessive noise | Check drill Check part rigiditiy Check for proper speeds and feeds |
Tool life | Lower speeds and feeds Check coolant flow and location Confirm concentricity of drill in holder Confirm coolant concentration |
Hole too small | Increase feed rate Confirm coolant concentration Confirm drill diameter |
Hole too large | Reduce feed rate Slow feed rate to start hole Increase RPMs Spot hole |
Chip welding | Increase RPMs by 20% Confirm coolant concentration Check coolant flow and location |
Chip packing | Add a peck cycle to clear chips Increase RPMs Reduce feed rate Check coolant flow and location |
-Troubleshooting for Drills
