Pete Keillor explained :
On Mon, 29 Sep 2008 17:34:30 -0500, Wayne
wrote:

A friend at work has a wine press which needs some help. The internal
threads of a piece that moves up and down on an acme thread are
damaged.
I've been unsuccesful at getting him to bring it so I can measure it.
Through other methods it appears to be 1.25 x 3 TPI (or possibly
M32 x 8.5). I haven't been able to find any sources for any acme
nuts of that size. The lowest the my lathe will go is to 4 TPI.
It will also do 6 or 9 TPI.
Is there anyway to fudge a 3 TPI?

Wayne D.

Mine switches from 9 to 4-1/2 tpi by switching from a 24 tooth stud
gear to a 48 tooth. If I could find a 72 tooth, that'd cut 3 tpi.

Pete Keillor

I don't think I'd get into looking for different gears for a one off
project such as this one.

Wayne D.