Applications & Solutions
This page provides answers to frequently asked questions as well as helpful information with regard to troubleshooting.
Trade division
Trouble Shooting Guide for drilling
12 tips to help diagnose problems
Click on the headings below to expand or collapse answers. Should you have further questions you can contact us
1. Cutting edge built-up
- Cause
- Cutting speed too low
- Excessive honing of cutting lip
- Bright finish cutting lip
- Remedy
- Increase cutting speed
- Reduce cutting lip honing
- Have tool coated
2. Crumbling of outer corner
- Cause
- Non rigid conditions insufficient work piece clamping
- Deviation from concentricity too large
- Interrupted cut
- Remedy
- Rigid clamping of work piece
- Check and correct concentricity if possible
- Reduce feed
3. Heavy wear and tear at flank
- Cause
- Cutting speed too high
- Feed too low
- Clearance angle too small
- Remedy
- Increase cutting speed
- Increase feed
- Increase clearance angle
4. Crumbling on cutting lips
- Cause
- Non rigid conditions insufficient work piece clamping
- Interrupted cut
- Max, wear and tear values have been exceeded
- Wrong tool type
- Remedy
- Rigid clamping of work piece
- Reduce feed
- Reduce tool change intervals
- Apply suitable tool
5. Land wear
- Cause
- Non rigid conditions insufficient work piece clamping
- Deviation from concentricity too large
- Back taper too small
- Wrong coolant (oil) soluble oil too thin
- Remedy
- Rigid clamping of work piece
- Check and correct concentricity if possible
- Increase back taper
- Thicken soluble oil or use neat oil
6. Scoring on tool body
- Cause
- Non rigid conditions insufficient work piece clamping
- Deviation from concentricity too large
- Abrasive material
- Remedy
- Rigid clamping of work piece
- Check and correct concentricity if possible
- Reduce feed
- Thicken soluble oil or use neat oil
7. Heavy chisel edge wear and tear
- Cause
- Cutting speed too low
- Feed too high
- Excessive honing of cutting lip
- Remedy
- Increase cutting speed
- Reduce feed
- Reduce cutting lip honing
8. Crumbling at intersection web thinning and cutting lip
- Cause
- Clearance angle too small
- Excessive honing of cutting lip
- Wrong tool type
- Remedy
- Increase clearance angle
- Reduce cutting lip honing
- Apply suitable tool
9. Plastic deformation of outer corner
- Cause
- Cutting speed too high
- Insufficient coolant
- Incorrect or no corner chamfer
- Remedy
- Decrease cutting speed
- Increase coolant (volume, pressure)
- Apply correct corner chamfer
10. Misalignment, axis shifting
- Cause
- Non rigid conditions insufficient work piece clamping
- Deviation from concentricity too large
- Spotting area transverse
- Chisel edge too large
- Remedy
- Rigid clamping of workpiece
- Check and correct concentricity if possible
- Use milling cutter (twin fluted) for spotting
- Reduce chisel edge
11. Heaving burring on breakthrough
- Cause
- Feed too high
- Max, wear and tear values have been exceeded
- Excessive honing of cutting lip
- Remedy
- Decrease feed
- Reduce tool change intervals
- Reduce cutting lip honing
12. Unsatisfactory surface finish
- Cause
- Non rigid conditions insufficient work piece clamping
- Deviation from concentricity too large
- Insufficient coolant
- Remedy
- Rigid clamping of workpiece
- Check and correct concentricity if possible
- Increase coolant (volume, pressure)
