On Dec 16, 11:53*pm, "
wrote:
Last night on my little Rockwell 21-100 mill, I was changing the radius on the underside of rifle scope base with a boring head.

As I raised the knee, there was cutting close to me, and then as I lowered the knee there was a new .001" of cutting on the mill side.

Is my vise too heavy?

Maybe. How heavy is it?

are the knee gibbs loose?

Probably, but that ought to be easy to check

What is going on?

See above.


TIA