One machine I have is using some of those Transtorque taper locks. For a 1/2" shaft they require a 7/8" bore on the pulley. It works very well in the application we're using it.
Todd Zuercher P. Graham Dunn Inc. 630 Henry Street Dalton, Ohio 44618 Phone: (330)828-2105ext. 2031 -----Original Message----- From: dave engvall <[email protected]> Sent: Thursday, January 27, 2022 12:45 AM To: [email protected] Subject: Re: [Emc-users] miniature taper-lock type pulleys [EXTERNAL EMAIL] Be sure links are safe. I assume everyone knows about these. https://nam04.safelinks.protection.outlook.com/?url=https%3A%2F%2Fwww.fennerdrives.com%2Ftrantorque%2F&data=04%7C01%7Ctoddz%40pgrahamdunn.com%7C48ebb618469644679cdb08d9e1585cfc%7C5758544c573f47cebee96c3e0806fb43%7C0%7C0%7C637788591905293663%7CUnknown%7CTWFpbGZsb3d8eyJWIjoiMC4wLjAwMDAiLCJQIjoiV2luMzIiLCJBTiI6Ik1haWwiLCJXVCI6Mn0%3D%7C3000&sdata=IhwZVWvjZdf7uiq9ZK93ZsKCeOlC2XtGtfmAbLHov9M%3D&reserved=0 Not cheap but tend to work. Dave On 1/26/22 8:30 PM, Ralph Stirling wrote: > 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://nam04.safelinks.protection.outlook.com/?url=https%3A%2F%2Fwww. > youtube.com%2Fwatch%3Fv%3D-3K_vf_7fhM&data=04%7C01%7Ctoddz%40pgrah > amdunn.com%7C48ebb618469644679cdb08d9e1585cfc%7C5758544c573f47cebee96c > 3e0806fb43%7C0%7C0%7C637788591905303659%7CUnknown%7CTWFpbGZsb3d8eyJWIj > oiMC4wLjAwMDAiLCJQIjoiV2luMzIiLCJBTiI6Ik1haWwiLCJXVCI6Mn0%3D%7C3000&am > p;sdata=V%2B2AvDhruCz4GIEEOGrXbnSS7FMw%2Fyqj%2F6tu3mtVVio%3D&reser > ved=0 > > 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 > [email protected] > https://nam04.safelinks.protection.outlook.com/?url=https%3A%2F%2Flist > s.sourceforge.net%2Flists%2Flistinfo%2Femc-users&data=04%7C01%7Cto > ddz%40pgrahamdunn.com%7C48ebb618469644679cdb08d9e1585cfc%7C5758544c573 > f47cebee96c3e0806fb43%7C0%7C0%7C637788591905303659%7CUnknown%7CTWFpbGZ > sb3d8eyJWIjoiMC4wLjAwMDAiLCJQIjoiV2luMzIiLCJBTiI6Ik1haWwiLCJXVCI6Mn0%3 > D%7C3000&sdata=ouGa5z5V8cH4kJf9zdlcKrxcwWQQVdXwMGrP%2BZHm%2Fl0%3D& > amp;reserved=0 _______________________________________________ Emc-users mailing list [email protected] https://nam04.safelinks.protection.outlook.com/?url=https%3A%2F%2Flists.sourceforge.net%2Flists%2Flistinfo%2Femc-users&data=04%7C01%7Ctoddz%40pgrahamdunn.com%7C48ebb618469644679cdb08d9e1585cfc%7C5758544c573f47cebee96c3e0806fb43%7C0%7C0%7C637788591905303659%7CUnknown%7CTWFpbGZsb3d8eyJWIjoiMC4wLjAwMDAiLCJQIjoiV2luMzIiLCJBTiI6Ik1haWwiLCJXVCI6Mn0%3D%7C3000&sdata=ouGa5z5V8cH4kJf9zdlcKrxcwWQQVdXwMGrP%2BZHm%2Fl0%3D&reserved=0 _______________________________________________ Emc-users mailing list [email protected] https://lists.sourceforge.net/lists/listinfo/emc-users
