Why a Tap Drill Hole Is Not Straight

Taps follow the drilled hole, so poor entry alignment or workholding creates a crooked thread.

Taps: selection checklist

  • Start the drill square to the workpiece.
  • Use a guide or rigid machine setup when needed.
  • Inspect the pilot hole before tapping.

How to choose the right option

  1. Stop and inspect the tool, workpiece and machine interface.
  2. Correct the size, geometry, setup or cutting condition involved.
  3. Run a controlled test and inspect the result before returning to production.

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For production quantities, unusual sizes or help selecting the correct tool, request a quote from Cutting Tools Outlet.

Industrial cutting toolsTapsTroubleshooting