On Saturday 26 December 2020 14:55:02 andy pugh wrote: > On Sat, 26 Dec 2020 at 19:34, John Dammeyer <[email protected]> wrote: > > Making a new lower pulley with 9 teeth is out of the question. It's > > too small for only 9T and definitely won't fit on the 19mm motor > > shaft. And that's the kicker. At almost 3/4" the pulley that goes > > onto it has to be large enough to have a decent grip with set screws > > onto a 6mm key. > > I seem to recall that it is recommended to not go below 12T anyway. > > I don't know much about L and XL belts, all my machines have used T5. > T5 is available in widths from 8mm to 25mm. > https://www.bearingboys.co.uk/T5-Section-5mm-Pitch-1224-c > > I also have the correct hob for making custom T5 pulleys, so that is > one reason for _me_ to use them. > > You could consider ignoring the keyway, especially if the motor shafts > have a threaded hole in the end. > > I have several times taken inspiration from the Trantorque bushings: > https://uk.rs-online.com/web/p/keyless-bushes/7542545/ > However they require a huge central bore, so what I have done is > machine the pulley bore with a taper and then pull or push in a > sleeve. > At various times I have used a bolt in the end of the shaft, a nut > pulling the wedge through, or a ring of bolts to push the wedge in. > > Here is variation on the theme, with two tapers: > https://bodgesoc.blogspot.com/2017/01/gears.html
That I like, a lot. I've made my own taperlock setups several times, but nothing that thin. Thanks for posting it. 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) If we desire respect for the law, we must first make the law respectable. - Louis D. Brandeis Genes Web page <http://geneslinuxbox.net:6309/gene> _______________________________________________ Emc-users mailing list [email protected] https://lists.sourceforge.net/lists/listinfo/emc-users
