I, too, have recently acquired a used Emcoturn 320. The previous owner said that the X-axis seals and bearings need to be replaced. I haven't even begun to address that issue at this point. I'm still in the process of cleaning the machine up.

I have come across one thing that puzzles me. While I was cleaning out the spindle motor cabinet, I noticed that there is an empty threaded hole in the top of the spindle motor. The threads in there are still shiny, so I think that hole was recently occupied by something -- perhaps whatever was in there rattled out while I was hauling the machine home?

Anyway, if any fellow owners of Emcoturn 320's could have a look at my pictures and let me know what is supposed to go in that hole, I would greatly appreciate it.