On Saturday 02 July 2016 09:08:59 Stephen Dubovsky wrote: > My L00 MT4.5 Clausing 5C adapter sticks out of the spindle a similar > amount. It's for the thread protector (which also serves to eject the > adapter when you unscrew it.)
No threads on this one at all, its just a tapered sleeve, pressed or drawn into its seat in the spindle by the 5C or in my case, the 5C->er40 adapter. So as I described to Cecil in a PM last night, I will remove enough of the rear of this sleeve to give me adequate access to the threads on the er40 adapter's tail. I'd like to have at least 8 threads engaged, but with the length of this MT->5C adapter I only have about 2.5 engaged when the drawtube runs into the rear of this adapter sleeve. since I have to add a nose piece to the drawtube spacer to both bear on the endplay adjuster nut instead of the bearing, and to center the drawtube, and order up some 3/8" ID ball bearing thrust washers for other parts of this conversion, I'll order one big enough to serve as a draw-tube<->wheel hub bearing too. Might as well go first class, the ticket doesn't cost that much more. :) Needs a swarf shielding cup around it of course. 3 other places for 6 total in my other cnc conversions I have used a ball bearing thrust washer with quite good results by putting an adjuster lock nut on the shaft so a bit of pre-load tension can be set. Buried in a pocket about .001" shallower than the bearing is thick, they can turn quite freely, and that .001 gap clearance does a good job of keeping swarf out. The rest of the bearing is still the close fit of the shaft in the bearing hub. With zero endplay there, the backlash is in the ball fit and well under 1.5 thou after hundreds of hours use in the little monster. The toy mill, not so lucky as I tried to make felt swarf wipers, which I have had to dis and re-adjust the pressure on the felt as it has collapsed, giving the trapped nut some room to move. I'd make a wrench to slip over the screw, but theres a limit switch in the way to keep LCNC from unscrewing itself out of the nut. Sigh, perfection is seems, is always just around the corner. So I've had to apply a saying an ex-b.i.l. was fond of using: "Its good enough for the girls I go with". :) [...] 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> ------------------------------------------------------------------------------ Attend Shape: An AT&T Tech Expo July 15-16. Meet us at AT&T Park in San Francisco, CA to explore cutting-edge tech and listen to tech luminaries present their vision of the future. This family event has something for everyone, including kids. Get more information and register today. http://sdm.link/attshape _______________________________________________ Emc-users mailing list [email protected] https://lists.sourceforge.net/lists/listinfo/emc-users
