1. Check to be sure the cutting edges of the Finish Tool are not dull, chipped, broken, or have material build-up.
2. Be sure the Finish Tool or its Inserts are correct for the type of finish cut.
3. Check the size of the workpiece after the Rough pass to be sure the Finisher is not removing too much material in the finish pass, or that the Finisher is not removing enough material.
4. Check the Feed Rate for the Finish pass.
5. Check the Spindle Speed during the Finish pass.
6. Be sure the coolant reaches the Finish Tool during the cut so that chips are flushed away from during the cut, and so that excessive heat does not build up in either the tool or workpiece.
7. Make sure the workpiece material is correct as specified in the setup documents, and that the hardness of the material is within normal limits.