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
