07-09-2014, 09:15 PM
(07-09-2014, 07:58 PM)PixMan Wrote: What the low end speed of your mill in RPM, and what 3" face mill & inserts do you have? What material are you cutting?
Most of the damage was chipping. I'm not sure of the material, but it certainly was not 1018 CRS. Even after I had it annealed at the local machine tool program at the community college it was a bear to machine with sparks and very hot chips flying everywhere. I found it along the side of the road and believe it was a replaceable edge for something like a dozer, road grader, etc. Tougher than all get out, but I did make the motor adapter for the Fray's feed gear box and the round plate with notches for my arbor press.
Working it in the lathe was not nearly as difficult, but it still was not easy. The old 14 1/2" South Bend I had at the time sure complained, but did the job.
Eventually I decided it was not worth the trouble and tossed it with my scrap and sold it to the recycler.
I agree experience gives one an advantage. When I started the trade in the US Navy the best cutting tools we had were cobalt & moly (MoMax). It was not until I was working in civilian shops that I began using carbide of any sort. Relied heavily (and still do) on the speed & chip load charts when setting up a job, especially on the mill.