On Thursday 03 March 2016 13:59:59 Ed wrote: > On 03/03/2016 11:14 AM, andy pugh wrote: > > On 3 March 2016 at 16:12, Gene Heskett <ghesk...@wdtv.com> wrote: > >>> Not normally. You remove Jacobs tapers with a pair of forked > >>> wedges: > >>> http://www.amazon.com/Wedge-Sets-Set-No-WEDGE/dp/B0067BSG9S/ref=sr > >>>_1_1 ?ie=UTF8&qid=1457019896&sr=8-1&keywords=jacobs+wedge > >> > >> Luverly, just luverly... > > > > Especially so when the JT is bigger than the MT so there is no > > shoulder to hook on to.
The MT3 did have a shoulder of sorts. > If the shank is bad then weld a couple of pieces of square stock onto > it and lever on that. I have removed bad ones by rapping the side of > the shank sharply with a small hammer. Rude and crude and unrefined > but it works. > > Ed. > I popped both of these with nothing more than a 3/8" rod stuck in the chucks mouth and the jaws brought down for a loose fit. Couple whacks with a 16oz claw hammer. It was driving right on the end face of the JT-3. Put the R8 spud back in the mill & dialed the jt-3, eccentric, not even round, 1.3 thou wobble at the top, and .7 thou at the bottom. Put the lathes chuck on it with one tap, obviously worse wobble, so I put the one that came with the mill back on. On a rod in the chuck, 27 thou of wobble 2" from the chucks jaws. Obviously better... Knocked it back off, pulled the R8-JT3 and cleaned the inside of the spindle and the spud, put it back together, still the jt-3 had some wobble but it was less by .1 thou. Slapped the mills OEM chuck back on it, measured 3 thou at the jaws, 5 thou 2" away. I'm standing there in disbelief with a WTF expression on my face when I came to the consclusion that the 2 instances of sloppy were mostly canceling each other, so I removed the whole thing and gave the back end of the R8 an ALU padded couple of whacks to set it good. Put it back in, still measured 5 thou 2" from the jaws. Since thats at least 50 thou better than it was, we'll see how it works next time. Occasionally on does hit a lick. ;-) Thanks Ed. 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) Genes Web page <http://geneslinuxbox.net:6309/gene> ------------------------------------------------------------------------------ Site24x7 APM Insight: Get Deep Visibility into Application Performance APM + Mobile APM + RUM: Monitor 3 App instances at just $35/Month Monitor end-to-end web transactions and take corrective actions now Troubleshoot faster and improve end-user experience. Signup Now! http://pubads.g.doubleclick.net/gampad/clk?id=272487151&iu=/4140 _______________________________________________ Emc-users mailing list Emc-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/emc-users
