On Saturday 04 July 2020 13:54:05 andy pugh wrote: > On Sat, 4 Jul 2020 at 18:02, Gene Heskett <ghesk...@shentel.net> wrote: > > Attacking HSS with diamond is a waste of time and burns up the > > expen$ive diamond. > > Whilst it is meant to be a terrible idea, in practice it works OK.
Not for me. Between the $20 dremel disks, and a $120 diamond plated on one side, 5" in diameter that I peeled the diamond off of, I've wore out or wrecked a good $300 worth just making a single tooth threading tool for a 10 tpi square thread on a 6.5 creedmoor barrel I was putting in old meat in the pot. > > I have a 4" cup cbn wheel, but the arbors are junk, so its contact > > isn't true. > > As bad as this one? > https://www.youtube.com/watch?v=Y1NwskdkFv4 I'd say half that bad. And the link worked just fine as it never triggered the word wrap, too short. > (I got my money back on that one. And confidently predict that the URL > won't work for Gene) See above. > You have a lathe? Re-machine the wheel and/or the arbor. Two of them, but this was 2+ years ago, before I found the spindle was bent on this Sheldon. That lathe is now running at under a thou runout several inches away from the chuck face. With a bent spindle, its been quite a chore to get to that. That lathe came to me with a smashed and broken compound from landing on the compound handle in a fallover I wasn't told about, and apparently the mounted 3 jaw was heavy enough to bend it when it fell. The MT-5 has been reground true again, both faceplates remachined true. The MT-5 rebore was about 7 thou to make it true again. And at least a 20 thou wobble cut back off the faces of both backing plates, and the registration ledge cut back enough to let me tap it true as I tightened the bolts. Cheers, Gene Heskett -- "There are four boxes to be used in defense of liberty: soap, ballot, jury, and ammo. Please use in that order." -Ed Howdershelt (Author) If we desire respect for the law, we must first make the law respectable. - Louis D. Brandeis Genes Web page <http://geneslinuxbox.net:6309/gene> _______________________________________________ Emc-users mailing list Emc-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/emc-users
