- Joined
- Aug 6, 2013
- Messages
- 335
There should be an adjustment for the preload on the spindle bearings. I'd check it. Also could be a pulley or belt issue including alignment. Unless the bearings are very worn I don't see them as being the wobble issue unless its a cracked or broken ball/needle. Heat maybe, but most likely whatever is causing the wobble is causing the added friction and heat. Do the pulleys have a good fit on the spindle shaft? I've seen set screws tightened and moving the pulley off center enough on aluminum pulleys that weren't a perfect shaft fit or out of round cause such a wobble. I had an LMS mill for a while but didn't have issues so never checked into the bearing preload. I put a belt drive on a grizzly mill I cnc converted and I had spindle heat issues prior to the belt drive and after. Decent angular contact bearings aren't too expensive and when I upgraded the bearings everything ran much cooler FWIW.