"Bob Engelhardt" wrote in message
...
Jim Wilkins wrote:
...
For a proof-of-concept demo to get a job I've adjusted a 4-jaw lathe
chuck to 1 micron. ...

Impressive! What was the tolerance on the piece in the chuck?

Bob

I only showed that the part could be moved by less than half a division on a
ten-thousandth indicator. The clamping force was too light for machining.

jsw