J. Mark Wolf wrote:

I recently noticed noticed that it was making poor cuts, and
the tool was "diving" in to the work. I investigated and found
that the brass Acme lead screw nut on one of the axiis was not
only loose, but is quite worn as well.

I've bought Acme nuts from Enco; but don't think they carry them
in brass. This URL should fetch their PDF catalog page:

http://www.use-enco.com/CGI/INPDFF?PMPAGE=664&PARTPG=INLMK32

If you do find a source of brass Acme nuts, I'd appreciate if you
let me know where/who it is!

--
Morris Dovey
DeSoto Solar
DeSoto, Iowa USA
http://www.iedu.com/DeSoto/solar.html