I have Rockwell 46-201 wood lathe that I picked up a few years ago. Sandblasted and painted it, replaced a few missing pieces, and installed new bearings. The threads on the spindle (1" 8tpi) are pretty rough. The spindle is not available for purchase new anymore. I have attached a few pictures. Anyone have any idea if the threads can be repaired, suggestions, or leads on any used spindles. The lathe came out of a high school.