On May 21, 4:27*pm, Ignoramus11200 ignoramus11...@NOSPAM.
11200.invalid wrote:


Am I missing anything?

i

Most lathes that will take a 12 inch chuck will not have a very high
spindle speed. Assuming you have more than one lathe, you would use a
much smaller lathe when turning something under 4 inches in diameter
and are using a fairly high spindle speed.

Assuming you are turning a 6 inch diameter part at 180 sfm, that would
be about 120 rpm.

Dan