Hello all.
Thank you very much for all your advice.
It has been passed on to my friend.
After doing a bunch of cleaning work on the lathe, he asked me for some help,
to make sure he was proceeding in the right direction, and test the lathe.
The machine is a Monarch model 12 C.
An electrician had been brought in to enable the motor - missing capacitors
have been replaced.
The history of the machine was it was brought into Canada in 1947.
It was the personal machine of the Shop Master, after the shop had been
converted to CNC,
and then he took the lathe when he retired. (!)
After that history, I got out the Height gauge, put the indicator on it,
and checked the ways for tolerance.
Results lengthwise are mainly +/- .1 to .2 thou, with one spot of +/- .7 thou.
Crosswise, between the ways was much the same. I could not detect any
individual warping of the ways.
This +/- .1 to .2 thou is not a problem, because the work will be +/- one thou,
maximum.
The legs of the lathe are bolted to a U channel. Lots of length exists to tie
the channel down to the concrete pad, and the machine may be moved later. IF
my friend finds their straps are not enough to keep the machine stable, they
can add more and stronger straps.
I was concerned with the compound rest, to enable thread cutting.
Buddy was thinking along the same lines, and had the gib of the compound rest
loose.
Pushed a cloth through a gib space three times to remove fines, applied grease,
and put the gib back. Clued in the "gib" was part of the compound rest's
tension / holding mechanism, and checked with my friend what force he wanted on
the compound rest handle.
The lead screw and pan were filthy, with chips dramatically larger than the
fines found alongside the compound rest "gib", so that proves that the lathe
had not been used by the original Shop Master for a while.
Yes, I have told my friend the lead screw is critical.
Did not try either feed.
Sorry. Too many things to do in a day.
Since the Monarch 12 C is not a model Monarch has continued to manufacture,
progress to making the lathe perfect will be slower.
Once again, I wish to thank everyone who gave advice.
James Isaac.
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