Boring small diameter holes with end mill held in lathe
Nov 23, 2020#0183;#32;Just be sure the one of the four cutting teeth at the end is 90 degrees to cutting surface. Started doing this due to chatter using HSS boring bits. This chatter appeared when handcranking a 10 degree slope in a 1/4 internal diameter cylinder. The only thing is that the cutter contact is almost nothing and I just plow through very slow in.