Problem |
Solution |
Wear on Outer Corners |
- Reduce cutting speed
- Increase feed (IPR)
- Improve direction of coolant flow
- Increase coolant pressure
- Add corner break
|
Chipping of Chisel Edge |
- Check accuracy of drill runout
- Check workpiece clamping accuracy and movement
- Check point centrality and lip height
- Increase feed rate
|
Chipping of Cutting Lips |
- Check accuracy of drill runout
- Check workpiece clamping accuracy and movement
- Reduce speed
- Reduce point clearance
- Increase hone
|
Cracking of Lands |
- Check movement of workpiece
- Increase back taper
- Check accuracy of drill runout
- Chip packing; increase flute form opening or peck drill
- Slow down helix, horizontal drilling
- Increase feed
- When spot drilling, reduce feed
- Improve direction of coolant flow
- Increase coolant pressure
|
Oversize Hole |
- Increase speed, reduce feed
- Check workpiece clamping accuracy and movement
- Check accuracy of drill runout
- Chip packing, increase flute form opening or peck drill
- Check point centrality and lip height
|
Undersize Hole |
- Improve direction of coolant flow
- Reduce cutting speed, increase feed
- Check drill diameter
|
Hole Not Round |
- Check accuracy of drill runout
- Check workpiece clamping accuracy and movement
- Check point centrality and lip height
- Chip packing, increase flute form opening or peck drill
|
Drill Breakage |
- Chip packing, increase flute form opening or peck drill
- Check workpiece clamping accuracy and movement
- Check accuracy of drill runout
- Reduce feed rate, increase feed rate
- Improve direction of coolant flow
- Increase coolant pressure
|
