triangular inserts . What worked was to lock the rotary table in position and using the end of the mill to do the cutting . Average depth of cut was around .015" per pass , cranking slow in X . I first tried locking down both axes and advancing the RT one hole (in a 47 hole plate) at a time . That calculated out to about .003" feed per hole . Full depth cuts , and that didn't work so well . I didn't make a killin' on this , but learned a little more about machining hard materials . I gotta say , I felt very pessimistic about this whole thing when an M42 end mill just skated on the part . Delivered them today and found out it took 20 years to cause the damage , this should give him 20 more - and this was their only option , parts are no longer available .
- posted
5 years ago