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Solid Carbide Drilling Troubleshooting

solid carbide drills

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


 
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