On Saturday 21 January 2017 18:30:24 Jon Elson wrote: > On 01/21/2017 01:24 PM, Gene Heskett wrote: > > Greetings everybody. > > > > My 3 jaw chuck atm, runs pretty true. But to be able to turn the > > faceplate around and clean up the OD of the hub for a grab surface > > for my clamp concoction so it can't unscrew itself during a violent > > reversal, I'll have to remove the chuck, removing its 5.16" socket > > cap screws. > > > > Whats my chances of getting it remounted so it runs true again once > > I have made a 2 or 3 thou cleanup cut on the rear hubs OD with the > > the faceplate reversed on the spindle? > > You should know about the "poor man's adjustable chuck". > You leave the register diameter on the backplate a bit > undersized, and it allows you to loosen the mounting screws > and tap the chuck into any alignment you like. Note that no > 3-jaw chuck can be trusted to hold any diameter exactly > true,
Very true of the $30 3" 3 jaw that came on TLM and exactly why its wearing a 5" 4 jaw independent chuck now. At least I can get back to sub-thou runouts by tensioning each jaw by itself with a 15" cheater bar on the key. > it always has some imprecision. So, when a critical > job come up, you clamp the work in the jaws and then adjust > the chuck to run the part true. A good chuck will then > repeat that position pretty accurately for the same diameter. > > Jon No, I didn't know about that by that name but have considered that possibility. So I'll go take it off tomorrow since I can probably put the tap-it-till-true clearance into it easily enough. I've never tried that on TLM because the fits were tight enough I have to knock them loose with a dead blow hammer, then draw the next one home the last 2 turns of each nut when installing the next one. Thanks Jon. 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> ------------------------------------------------------------------------------ Check out the vibrant tech community on one of the world's most engaging tech sites, SlashDot.org! http://sdm.link/slashdot _______________________________________________ Emc-users mailing list [email protected] https://lists.sourceforge.net/lists/listinfo/emc-users
