I have obtained a 10 pack of uxcel 3mm mills. Look more like a rasp than
a normal spiral mill. 2 edges on the plunge face though.
They will be used as both the probe signal generator to find the 3mm
holes for bolts in a 9mm wide linear bearing rail. That means they will
have maybe .2mm total clearance when inserted into the 3mm hole in the
rail to reach the bottom of the hole. When functioning as the probe
contact I'm spinning them in reverse, so if they do touch, tripping the
probe, they should skip w/o cutting because they are turning backwards.
I intend to do the usual 4 corner search when locating the hole, but
once found, I'll g38.2 Z deep enough to reach the cf tube, reverse the
direction to fwd, and run it down several mm thru the cf and stroke it
up and down to clear as much of the cf from the hole as possible.
What I need is a good idea of an rpm and feed rate that will not wear
the edge from too slow.
What revs and feed rate stands a chance of doing a decent job of making
a clean hole w/o excess tool wear? Max revs about 2750/minute.
Thanks all.
Cheers, Gene Heskett, CET.
--
"There are four boxes to be used in defense of liberty:
soap, ballot, jury, and ammo. Please use in that order."
-Ed Howdershelt (Author, 1940)
If we desire respect for the law, we must first make the law respectable.
- Louis D. Brandeis
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