I glued loads of pulleys to motor shafts with loctite 648. no issues, interference fit is no problem.
> On 9. Mar 2018, at 08:17, Marcus Bowman <[email protected]> > wrote: > > Last time I spoke to the technical chaps at Loctite, they emphasised that > mating components should be a light press fit, or at least an interference > fit, because Loctite works at the molecular level, across the shear plane > between the surfaces. That arrangement provides maximum strength. > Although page 5 of the document claims it 'fills gaps', the illustration > reveals these are simply the interstitial spaces in an interference fit. > > What about a key? > Mind you; a margin of 100% (from your calculation) is not bad at all, given > that 13Nm is the peak torque. > > Marcus > > On 8 Mar 2018, at 23:28, andy pugh wrote: > >> I need to connect a toothed-belt pulley to a motor shaft. >> >> (I have burned out the motor on the Z of my mill, so need to fit a >> replacement pulley to the replacement motor). >> >> The previous pulley was attached by a cunning taper-lock. I bored the >> pulley bore with a taper, and made a thin tapered sleeve that was >> pushed in by a screw and washer in the threaded hole in the end of the >> shaft. >> That has worked very well. Too well, I really can't get it apart. >> >> For the new motor I am thinking of just Loctiting the pulley on. >> >> The new motor is rated 3.4Nm. >> >> A case-study here >> http://na.henkel-adhesives.com/us/content_data/356776_9294_LT5021_Retaining_Brochure_F.pdf >> calculates 225Nm for a 32mm shaft. >> The torque goes with the square, so (225 / 32^2) * 11^2 gives me 26Nm >> for my 11mm shaft. >> >> A very similar motor from the same manufacturer is rated 3.4Nm and has >> a peak torque of 13Nm. >> >> I wonder if that is enough margin? >> >> -- >> atp >> "A motorcycle is a bicycle with a pandemonium attachment and is >> designed for the especial use of mechanical geniuses, daredevils and >> lunatics." >> — George Fitch, Atlanta Constitution Newspaper, 1916 >> >> ------------------------------------------------------------------------------ >> Check out the vibrant tech community on one of the world's most >> engaging tech sites, Slashdot.org! http://sdm.link/slashdot >> _______________________________________________ >> Emc-users mailing list >> [email protected] >> https://lists.sourceforge.net/lists/listinfo/emc-users > > > ------------------------------------------------------------------------------ > Check out the vibrant tech community on one of the world's most > engaging tech sites, Slashdot.org! http://sdm.link/slashdot > _______________________________________________ > Emc-users mailing list > [email protected] > https://lists.sourceforge.net/lists/listinfo/emc-users ------------------------------------------------------------------------------ Check out the vibrant tech community on one of the world's most engaging tech sites, Slashdot.org! http://sdm.link/slashdot _______________________________________________ Emc-users mailing list [email protected] https://lists.sourceforge.net/lists/listinfo/emc-users
