Take a grinder to the motor shaft and make a flat on it. Then tighten the setscrew on the flat with some Loctite on the threads or a second setscrew behind it if you have the room.
John > -----Original Message----- > From: Ralph Stirling [mailto:ralph.stirl...@wallawalla.edu] > Sent: January-26-22 8:30 PM > To: emc-users@lists.sourceforge.net > Subject: [Emc-users] miniature taper-lock type pulleys > > I had some problems today with a small XL timing > pulley slipping on a NEMA17 stepper shaft due to > the set screw loosening after running for long > periods (multiple days). I drilled and tapped a > second set screw hole, and I can probably apply > some thread locker, but I got to wondering if it > would be possible to make a miniature taper lock > type bushing and pulley to clamp onto a stepper > shaft. Anybody ever seen anything like that? > > The original taper lock system has a split bushing > with an 8 degree taper against the pulley. They > also have a clever set screw arrangement to tighten > the pieces together and to jack them apart when > removing. If you haven't used them before, a video > is the best way to understand them: > https://www.youtube.com/watch?v=-3K_vf_7fhM > > I like to 3d print my timing pulley perimeters, but > a metal hub is nice (as has been discussed on here > in the past). I'm pondering how I could make hybrid > pulleys with a taper locking hub. Threading the holes > in the plastic pulley wouldn't work so well. Perhaps > some threaded metal insert can be incorporated from > the back side. > > Enough of my musings. Looking forward to hearing > other ideas and suggestions. > > -- Ralph > > _______________________________________________ > Emc-users mailing list > Emc-users@lists.sourceforge.net > https://lists.sourceforge.net/lists/listinfo/emc-users _______________________________________________ Emc-users mailing list Emc-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/emc-users
