On 05/16/2015 09:11 AM, Gene Heskett wrote: > > On Saturday 16 May 2015 09:54:14 Jon Elson wrote: >> On 05/16/2015 04:41 AM, Gene Heskett wrote: >>> A hole that I presume is actually centered and can be used to >>> register it? That would be a nice touch. ;-) >> I would not trust it! The powder sintered pulleys I got >> were visibly out of center, > I would be afraid of that, but visibly off, yee gods! I bought some R-8 end mill holders and could just see that they looked odd when I took them out of the package. Turned out to have .020" eccentricity! I had to send them back. Apparently, a whole batch of them were made badly. Got to check all tools when they come in. >> which didn't matter as I was >> turning them on the lathe, holding the OD in rings in the chuck. >> >> Jon > Precisely why I posted the snide remark, Jon. I should have added a > frownie. :-( > > But I fear that my 4 jaw, independent, is not the chuck to use unless I > want to trust the DRO, so I can mount the indicator on the cross slide, > and back it out of the way of a passing jaw as I'm playing with the > tensions for that final bit of eccentricity removal. That sort of thing > needs a 6 jaw scroller, and they need a BIG red wagon load of rolled > quarters to put a quality one on my property. :-( > Yes, I bought a nice Phase-II adjustable 8" chuck on sale quite some years ago, and had it on my 12" Craftsman lathe. When I upgraded, I put it on my Sheldon 15". It still holds parts to about .001" TIR most of the time.
I rarely ever put the 4-jaw on the lathe. Jon ------------------------------------------------------------------------------ One dashboard for servers and applications across Physical-Virtual-Cloud Widest out-of-the-box monitoring support with 50+ applications Performance metrics, stats and reports that give you Actionable Insights Deep dive visibility with transaction tracing using APM Insight. http://ad.doubleclick.net/ddm/clk/290420510;117567292;y _______________________________________________ Emc-users mailing list Emc-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/emc-users
