"Tim Wescott" wrote in message
...
Harold and Susan Vordos wrote:
"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.

Harold

Merry Christmas! (Or should that be Happy Holidays?) g


In other words, an acme thread has a kinda-square profile, as opposed to
a triangular profile like "regular" threads.

--

Tim Wescott


Well, sorta. You have to be careful to not confuse an Acme with a square
thread, which resemble one another quite a bit. Difference? The 29
degree included angle that the Acme enjoys as opposed to the square
shoulders of a square thread.

Harold