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Troubleshooting Indexable Drilling

Troubleshoot Guide for DRILL-FIX

Problem

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.

Problem

 

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%.

Problem

Solution

  • Increase coolant pressure and volume.
  • Reduce cutting speed by 20%.
  • Use a more wear-resistant grade.

Problem

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.

Application Guidelines for HTS-C Drills

Spot Drilling

Spot Drilling

For plain/straight surfaces, no spot drilling is required. For centering, the center drill diameter should be considerably smaller than the pilot drill diameter.

Spot Drilling and Drilling Through on Inclined Surfaces

Spot Drilling and Drilling Through on Inclined Surfaces

 

Up to an 8-degree inclination angle is possible. Drilling through at a maximum of 4-degrees is possible, otherwise, a pre-facing operation is necessary.

Multi-Stage Drill Hole

Multi-Stage Drill Hole

 

HTS-C Series Drills are not recommended for boring operations. First, use the HTS-C drill to drill a larger diameter hole. Then, use a solid carbide drill for smaller holes. Optimum centering of the solid carbide drill is possible on the drill hole of the pilot drill.

Troubleshoot Guide for HTS-C Drills

Problem

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.

Problem

Solution

  • Use tougher carbide grade.
  • Reduce feed by 20%.
  • Check clamping accuracy (tool and workpiece) for possible improvement.

Problem

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.

Problem

Solution

  • Use coated carbide pilot drill B504 in grade CS3.
  • Increase coolant pressure and volume.
  • Reduce cutting speed by 20%.  

 

Problem

Solution

On Lathes:

  • Use a more wear-resistant carbide grade.
  • Increase coolant pressure and volume.
  • Reduce cutting speed by 20%.  

Problem

Solution

  • Optimize chip control for given application.
  • Increase cutting speed by 20%; reduce feed by 20%.

Problem

Solution

  • Increase coolant pressure and volume.
  • Increase cutting speed by 20%.
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