Hello, I need some advice/suggestoins regarding reinstalling a timing belt pulley on a Light Machines (now Intelitek) Prolight mill. I used a bearing puller to remove the pulley- wanted see if it was feesible to change the ratio by installing another size- and now I realize it isn't going back on without some persuasion. It seems the pulleys are bored out to fit that portion of the screw- and then pressed on somehow- no flats for the set screws.
Any ideas on how to get it back on there without hurting the ballscrew and ball nuts? Should I take the screws somewhere and have a flat ground and then open up the pulley a bit? Gently "tap" it back on until I can get the nut that holds it all together back on there (the nut would be able to push it on after that)? I am really paranoid about damaging the screw.
What I should have done was ditch the stock motor mounts (which limit the pulley OD to under 1.5 inches) made my own mounts, and then gone to a larger pulley on the motor- hindsight being what it is...
Thanks for the tips- heating did the trick. I figured I couldn't mess much up by heating it (and even I knew not to use the microwave ). It slid on no problem. I never would have thought something like that would work but I'm sure glad it did! Thanks again. -Ryan