I've had my machine for about 2 years. I've always had a lot of chatter with carbide tooling, but becasue I don't use it very often it hasn't been a big issue.
Right now I'm doing a run of parts and need to use a carbide cutter I have for a few of the operations. It's screaming like a .... well something that screams a lot.
The part is 1.5" X 2.5" X 6" 6061 held in a 6" vice. The cut that's giving me the most problem right now is dead center in the part. It's roughly 3"x0.75" pocket 0.65" deep.
The cutter is a 0.500" solid carbide 4 flute with a .125 Radius. DOC is 0.050", full width (small pocket). 4450 rpm 48ipm. The cutter is held in a 0.500" TTS holder with the cutter sticking out 1.300". This should be a relatively easy/light cut but it's still screaming, although sometimes worse then others. I've tried more feed as well as less rpm but nothing has made the chatter go away.
I recently faced my spindle and it made little difference. I'm stumped and looking for any ideas of suggestions anyone might have.
Thanks