I have some 1" OD, 1/16" thick (or thereabouts) stainless washers. I machine a slot that is about 1/4" wide and 1/4" deep in them. Right now I have a shaft and I put 40-50 of them on this shaft and put a nut on the end and just load it in my vice. I seem to be going through quite a lot of bits.
I am a newbie at this type of machine work and I am curious what sort of RPM, depth of cut, and feed rate I should think about? I am using a 4-flute endmill and I have carbide and TiAlN (I think thats the name) coated.
Thanks for any suggestions!