Our screw machine is down and I have to get these pins running a our cnc lathe. The tip is about 1.8mm in dia and after about 12mm it starts a taper that goes to about 3.7mm dia. and the over all length about 33mm long. Anyway I am having problems with the first 10mm being over sized because it's so narrow that the cutter is pushing the part down. Heres the setup I have in there now.
It's 3/16 4140 round stock. Iím using a 55-degree, .4mm nose radius sandvic insert. This thing is getting annoying so any help would be nice.