Originally Posted by
QuinnSjoblom
Everything showed up last week. I checked a few things on the spindle and tool holders and everything looks very good. no measurable run out in the taper that i could see. needle on my tenths dti stays dead still.
I was able to get the top end of the spindle apart to remove the stock pulley. The pulley is stacked on top of a bell and then the top bearing. The preloaded pair of bearings are below and secured with a separate nut so I don't have to mess with that to swap the pulley. when I had the pulley and bell removed and top bearing exposed, I noticed something that worries me a bit. when turning the spindle by hand, the outer race of that top bearing was turning slightly occasionally. the bell and pulley stack clamp down on the inner race of that bearing, so the outer race is not secured when it's assembled. I would assume the outer race of that bearing is meant to float vertically as not to fight the vertical position of the preloaded pair, but shouldn't the outer race at least fit tight enough to not spin? I grabbed the top of the drawbar with my cordless drill and spun it up at 2k rpm. At that speed the outer race of that bearing was still taking probably 30 seconds to intermittently move a full revolution. Is this going to be a problem? I feel like maybe once the drive belt is tensioned on there, maybe it will put a bit more pressure on that top bearing and stop it from moving but it still doesn't seem right to me. one thought I had was very carefully wicking some green loctite around that outer race with a needle, but I don't know if that's a good idea. It seems to be pretty greasy on the inside bore of the spindle so I don't know if loctite would bond anyway.
any thoughts on this? I was planning on taking some pics and videos to show the seller and ask if that's normal, but I wanted to get an opinion on here first. To me that doesn't seem right at all, but I don't know much about spindles.