"Joe Gwinn" wrote in message
...
In article , Jim Wilkins
wrote:

Could be, a kinematic fit may be good enough for the steady rest
since
it doesn't slide and wear.

If you recall, I got a 70-degree included angle conical mill bit for
making Vee grooves to fit the Clausing. The resulting grooved
blocks
are quite stable on the ways, not being in the least wobbly.

Joe Gwinn

A kinematic fit refers point or line contact, the minimun needed to
prevent wobble. A 3-leg stool is a good example. Unlike a large-area
contact they wear quickly and may deform under heavy load.
jsw