On Tuesday 31 October 2017 11:45:45 Ed wrote: > I have a noisy bearing on the Z axis motor of my CHNC Hardinge that > needs to be replaced. > > Does it hurt anything to remove the rotor from the field housing to > replace the bearings? > > Steppers are damaged by improper disassembly, what about DC brush > servos ? > I think that depends on if its powered field, or a PM field. For PM fields, I'd want to make a shunt in the shape and size of the armature, counter bored on one end to fit over the armature shaft and windings, out of magnetically soft steel, so that the end cap can be removed, and this "magnetic shunt" can follow the armature as it is removed and it remain stuck to the PM field poles while the armature is on the bench getting its bearings serviced. It gets pushed back out as the armature is re-inserted.
It may be less tom-foolery by just removeing the end caps and making whatever is needed to pull and push the bearings while the armature is still inside the field poles. The motors maker has such tools to do exactly that if the price is reasonable. Including the best quality bearing, I'd say anything under the $50 to $75 range per end is semi-reasonable. Remember that you have to be lox clean magnetically while its open else you may reassemble it with magnetic filings in the pole to armature gaps. This is very bad karma for the motor as that stuff is very difficult to remove once allowed in. Good, illegal air nozzles with 125 to 200+ psi might be needed. OSHA has zero tolerance for that sort of thing. > TIA Ed. > > > ---------------------------------------------------------------------- >-------- 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 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) Genes Web page <http://geneslinuxbox.net:6309/gene> ------------------------------------------------------------------------------ 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
