wild_musk
Plastic
- Joined
- Apr 4, 2011
- Location
- albuquerque
I'm working on a Logan 2557 12" lathe. It has the taper attachment, which requires a longer crossfeed screw. It came from a high school, and the hand crossfeed screw assembly was bent - the linkage through the hand crank to the crossfeed screw, Logan calls it the crossfeed sleeve gear. The crossfeed screw itself is ok, at least not visibly worn or bent. The hand crank turned ok, but not concentric.
I plan to replace the bent part of the crossfeed sleeve gear, but first I just improved the conentricity of the hand crossfeed assembly by bending the bent part back, and I cleaned everything up. I used a dial indicator and rotated the part to determine where and how much to bend it. I used a vise with 3 round bars to do that. It's not ideal, but the dial no longer appears to wobble as the hand crossfeed is rotated. But now I have a new issue.
The crossfeed screw is secured at the far end with a simple washer and nut. After cleaning and oiling, the nut has begun tightening down randomly when I turn the crossfeed, locking the hand crank. I put up with that wobbly crossfeed for 5 years, and the thing always turned smoothly. I wonder if the nut was too gunked up to be able to tighten down before? Am I supposed to thread lock it in place? I can't figure out why it ever turned smoothly before I straightened and cleaned the assembly? I looked over the diagram, can't find any missing parts. Any ideas about what I'm screwing up? I think I must be missing something very basic. I thought I could set the nut position with a second nut, but just wanted to see if anyone else has one of these can help or if someone can explain it to me.
I plan to replace the bent part of the crossfeed sleeve gear, but first I just improved the conentricity of the hand crossfeed assembly by bending the bent part back, and I cleaned everything up. I used a dial indicator and rotated the part to determine where and how much to bend it. I used a vise with 3 round bars to do that. It's not ideal, but the dial no longer appears to wobble as the hand crossfeed is rotated. But now I have a new issue.
The crossfeed screw is secured at the far end with a simple washer and nut. After cleaning and oiling, the nut has begun tightening down randomly when I turn the crossfeed, locking the hand crank. I put up with that wobbly crossfeed for 5 years, and the thing always turned smoothly. I wonder if the nut was too gunked up to be able to tighten down before? Am I supposed to thread lock it in place? I can't figure out why it ever turned smoothly before I straightened and cleaned the assembly? I looked over the diagram, can't find any missing parts. Any ideas about what I'm screwing up? I think I must be missing something very basic. I thought I could set the nut position with a second nut, but just wanted to see if anyone else has one of these can help or if someone can explain it to me.