On 2005-03-07, Rob Newman wrote:
Actually, if you use a good dial indicator with a four jaw chuck, you can
turn perfectly round stock. (zero runout)
If you do the same thing, you can turn a round post on square stock(good for
cam lobes), or elliptical lobes for whatever....

None of those things is true of a 4-jaw *self-centering* chuck, which is
what the guy was talking about.

--
Ben Jackson

http://www.ben.com/