12-22-2015, 11:15 PM
(12-21-2015, 11:03 AM)Sunset Machine Wrote: Guessing: It looks like the end of the cutter has made full contact, causing chatter. Not enough relief, the endmill has slipped in a collet, or there's a lot of flex in the mill. The full circle here is saying something:
Well I found part of the problem....
I went ahead and tried taking a skim cut with a 1" 4-flute HSS endmill. MUCH better!
Time to get the ring off of the arbor and turn it into a broach bushing.
Won't be long now. (Famous last words...)
Willie