On Fri, 23 Dec 2005 04:40:24 +0000, (DoN.
Nichols) wrote:

According to Harold and Susan Vordos :

"Andrew VK3BFA" wrote in message
oups.com...
snip----

Still dont know what an
ACME thread is. Have a small Unimat lathe

If your Unimat has a lead screw, chances are good it is an Acme thread.
The thread has an included angle of 29 degrees, and the root and crest is
flat.

Not based on my old Unimat SL-1000. That one used plain M6x1.0
threads for all leadscrews. (And M12x10. thread for the spindle nose
and the duplicate one on the tailstock ram.)

But I agree that it *should* have Acme threads. :-)


Enjoy,
DoN.
Likewise for the Unimat 3 except that the lead screw and cross slide
screw are M7x1.0, the spindle and tail stock ram are M14x1.0 and the
compound is M6x1.0
Gerry :-)}
London, Canada