Undersize Pitch Diameter

Damaged Thread

    Undersize Pitch Diameter>
  • Use proper reversing speed to avoid damaging tapped thread on the way out of the hole.

Incorrect Tap

  • Use oversize taps:
    • Use for cutting materials such as copper alloy, aluminum alloy, and cast iron.
    • Use for cutting tubing which will have "spring back" action after tapping.
  • Apply proper chamfer angle.
  • Increase cutting angle.

Left-over Chips

  • Increase cutting performance to avoid any left over chips in the hole.
  • Remove left over chips from the hole for gage checking.

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