"Dave Hinz" wrote in message
...
On Wed, 01 Mar 2006 22:30:51 GMT, RoyJ wrote:
It's always good practice to tighten all the holes in sucession. It
takes out any possible slop in the the chuck,

How can it? The two parts you're exerting force on, are the same parts
in each of the 3 locations.

Simple. Due to inherent clearances of components, the outer member is skewed
by the tightening force, so you benefit by tightening each of the positions,
offsetting the deflection, with a result of a tighter grip. You usually
gain better concentricity in the bargain. If the device was perfect, with
no slop, and no friction, that likely wouldn't be true

Harold