Hello gentleman, I'm new here and need some help. I also have Craftsman Commercial 101.28980 The bed is 42" long and the cross slide, travels about 6" Is it a 12" lathe or 6"? There is visible wear on the X-Slide, mostly on the front rail and my cross slide Y-Slide, gets tighter as it goes dipper in away from me. Obviously it is worn on the front. But I've learned to deal with it and not complaining. However, the biggest problem I have is when I'm parting off a piece. I use KDK tool holders and ISCAR parting blade with inserts and 5C collet chuck, as well as 5" six-jaw Buck chuck. Needless to say, that I have my tool aligned exactly in the center, perpendicular to the work, 50% speed, and plenty of cutting oil. When I'm parting, my work, sometimes jumps on top of my blade and breaks it. When I free the blade and spin the chuck - it seems to wobble, although it wasn't wobbling before. I would unscrew the chuck and screw it back again, then it quits wobbling, until the next parting off accident. Correct me if I am wrong: There could only be two reasons for that. It's either my tool holder is not sturdy enough and it dives under the work, or my spindle bearings are gone. I tightened all the gibbs but it didn't help. The last time I looked at the bearings, was when I replaced the belts and they looked OK to me. Please advise, what am I missing? It only happens under a lot of pressure, when parting. It never happens when I'm turning, even under a lot of pressure. UPDATE: I forgot to ask: It seems like every time, I move my tail stock, it gets off center. The question is: Do I loosen the nut, that's holding the tail stock, before I start adjusting my screws (one on the front, one on the back), or I could adjust my tail stock, while it's holding my work tight?