paranoid56
Well-known member
With a ball nose end mill, you can't use a 50% overlap or you end up with the ridges. The smaller overlap you can do the better. It takes longer but gives a better finish. For what you are doing, try a flat bottom cutter, 2 flute, then you can run a 50% overlap. For a ball nose, I wouldn't go more than 5-10% at the most overlap for a decent finish.
Yea the only reason for the ball mill was to give the inside edges the roundness. i normally use a 2 fluke flat cutter and can do 10% overlap. when i do the next test i will probably do 90-95% overlap with the ball or just switch back to my normal flat bit


