Incorrect Tap Selection
- Reduce cutting angle.
- Use different kind of high-speed steel tap.
- Reduce hardness of the tap.
- Increase chamfer length.
- Avoid chip packing in the flutes or in the bottom of the hole by using spiral fluted or spiral pointed taps.
- Reduce tapping speed.
- Avoid misalignment between tap and hole.
- Avoid sudden return of reverse in blind hole tapping.
- Avoid galling.
- Use large hole size.