On Wednesday 14 May 2014 02:46:26 Steve Blackmore did opine And Gene did reply: > On Tue, 13 May 2014 15:14:53 -0400, you wrote: > >As I need every mm of that screw I can salvage, I am thinking of > >boring a pocket in the inside end of the bearing boss end that fits > >the OD of the screw, close enough I might have to drive it in. Then > >turning a "pipe taper" thread on the OD for a suitable nut, then > >slitting the end into 4 petals, so that when the nut is screwed on, > >it closes up the petals and gets a death grip on the screw. > > > >Long term workable? I should think so, but has anyone else done it > >that way? There simply is not room inside an 8mm shaft for one of > >those dual tpi screws as likely will not have adequate wall thickness > >for the 6.35mm extension the motor drive coupling will be clamped to. > > > >I did do that on the lathes x, but used a 9mm thru shaft, and the > >motor is on the other end of the screw, so all this rig had to do was > >take the end thrust, which its done rather nicely so far. > > Can't picture what you are trying to achieve here but all of it sounds > awfully over complex? > > As Andy said - glue > > A simple sleeve "glued" on will work for a ball screw extension. It > will hold FAR greater than what a wimpy stepper is ever going to > achieve to break it. > > Just use correct glue. > > BTW - super glue is wrong answer.. > Ok, so name the Right Stuff(TM).
I thought about one of the Goop's, but that stuff can be springy. Motors are 425 oz max, those 2 are 262's though. Also thought of the epoxies, but I've had some disappointing results as it gets brittle with the years. I still like the mechanical clamp from hell, the pipe thread idea. I can make that with G33 easily enough. And in any size needed as its a one off anyway. Looking around the shop for a 7/16" SAE nut I can re-bore came up empty though. So I might have to make the whole nut from 5/8" stock. Not impossible either, and probably desirable since stock nuts are too thin anyway. Using a pipe wrench to tighten it wouldn't bother me either as once assembled, it goes out of sight, and the hex corners clearance might need dremel surgery on the table ends. Keeps me out of the bars don'tcha know, Steve. > Steve Blackmore > -- > > ----------------------------------------------------------------------- > ------- "Accelerate Dev Cycles with Automated Cross-Browser Testing - > For FREE Instantly run your Selenium tests across 300+ browser/OS > combos. Get unparalleled scalability from the best Selenium testing > platform available Simple to use. Nothing to install. Get started now > for free." > http://p.sf.net/sfu/SauceLabs > _______________________________________________ > Emc-users mailing list > [email protected] > https://lists.sourceforge.net/lists/listinfo/emc-users 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 ------------------------------------------------------------------------------ "Accelerate Dev Cycles with Automated Cross-Browser Testing - For FREE Instantly run your Selenium tests across 300+ browser/OS combos. Get unparalleled scalability from the best Selenium testing platform available Simple to use. Nothing to install. Get started now for free." http://p.sf.net/sfu/SauceLabs _______________________________________________ Emc-users mailing list [email protected] https://lists.sourceforge.net/lists/listinfo/emc-users
