Troubleshooting Indexable Drilling
Solution
On Lathes:
- Check machine alignment.
- Check clamping accuracy. If tool clamping cannot be improved and/or optimum machine stability is doubtful, reduce feed by 30%.
- Use tougher carbide grade.
TIP: Grades can be mixed to achieve optimum performance.
EXAMPLE: Use grade C7225 in the inside pocket with KC7140 in the outside pocket.
Solution
- Increase coolant pressure and volume (coolant helps support chip evacuation as well as cooling the cutting edges).
- Optimize chip control for a given application.
- Increase cutting speed by 20%.
Solution
- Increase coolant pressure and volume.
- Reduce cutting speed by 20%.
- Use a more wear-resistant grade.
Solution
- Increase coolant pressure and volume.
- Increase cutting speed by 20%.
- Check clamping accuracy (tool and workpiece) for possible improvement.
TIP: Use higher speed with lighter feed to produce better hole quality.
Troubleshoot Guide for HTS-C Drills
Solution
On Lathes:
- Verify that the tool is centered correctly. Readjsut machine, if necessary.
- Check clamping accuracy (tool and workpiece) for possible improvement.
- Use pilot drill B503 in HSS grade AS3.
Solution
- Use tougher carbide grade.
- Reduce feed by 20%.
- Check clamping accuracy (tool and workpiece) for possible improvement.
Solution
- Use tougher carbide grade and/or stronger insert geometry.
- Reduce feed by 20%.
- When drilling through, reduce feed by 50%.
- Check clamping accuracy (tool and workpiece) for possible improvement.
Solution
- Use coated carbide pilot drill B504 in grade CS3.
- Increase coolant pressure and volume.
- Reduce cutting speed by 20%.
Solution
On Lathes:
- Use a more wear-resistant carbide grade.
- Increase coolant pressure and volume.
- Reduce cutting speed by 20%.
Solution
- Optimize chip control for given application.
- Increase cutting speed by 20%; reduce feed by 20%.
Solution
- Increase coolant pressure and volume.
- Increase cutting speed by 20%.