On Monday 05 May 2014 03:57:25 Steve Blackmore did opine: > On Sun, 4 May 2014 08:52:26 -0400, you wrote: > >The first one resembles the anchoring for the 16mm5 screw used as the Z > >on the lathe, 12mm bore and I had yet to get all the end play out of > >it even though I have extra shims between the bearings outer races. > >Poorly made, so I still have about .0015" of end play. 20 thou better > >than the OEM screw & half nut, but still... > > Only a few ways they can have endfloat. Not tight enough, nut bottoming > out on thread, wrong length spacer or bearings in wrong way ;) If they > are angular contact bearings and you fit them facing the same way, you > get endfloat - Never trust them being correctly assembled out of the > box.
I did check that at the time Steve, and they were both facing the correct way, large diameter end of the inners to the outside, that side also has a dust seal. But the inner races were meeting solidly and when the nut is tight, there is still about 2 thou of play. As shipped, it was about 9 thou with the nut tighter than a bulls butt in fly time. I did check the threads, and there were about 4 left when the nut was solid. I wound up putting a ring of 28 gauge wire so as to space the outer race of one bearing a few thou farther out. But next time I take it apart, I'll lay in a thicker wire, or if I can't find that, another piece of the 28 gauge on the outer race of the other one too. The bevels on the outer edge of the outer races are prominent enough a piece of 30 gauge just rattles in the room the bevel makes. Even most of a 28 gauge wire is absorbed in the bevel. I spent a couple hours getting that wire to lay in there just so. ;-) That, fortunately, is fairly easy to get to, and remounting the far end isn't that big a deal, I just run the nut & carriage out there and bolt it down wherever the nut is holding it. Thanks Steve. Cheers, Gene -- "There are four boxes to be used in defense of liberty: soap, ballot, jury, and ammo. Please use in that order." -Ed Howdershelt (Author) Genes Web page <http://geneslinuxbox.net:6309/gene> US V Castleman, SCOTUS, Mar 2014 is grounds for Impeaching SCOTUS ------------------------------------------------------------------------------ Is your legacy SCM system holding you back? Join Perforce May 7 to find out: • 3 signs your SCM is hindering your productivity • Requirements for releasing software faster • Expert tips and advice for migrating your SCM now http://p.sf.net/sfu/perforce _______________________________________________ Emc-users mailing list Emc-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/emc-users
