Hi,
I got to work on the lathe...I finished disassembling and cleaning every single piece.
To reply Dennis, mi apron is missing the worm gear and the casting supporting it.
Also the split nut is different from the one in the picture you posted, in my case the thread is brass.
Here two pictures of the back of the apron (before and after cleaning).
About the threading lead screw I remembered well, it is imperial, 12 threads per inches.
Andrea
