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%.
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