On 11/27/2009 04:45 PM, Mark & Juanita wrote:

... and that is the beauty of your design. I really like that concept.
You should seriously think about having a number of these made and
marketing them. I know I'd buy a couple -- one for 1/2" collet and one for
1/4" collet

The Bosch centering cone works on similar principles, and is
double-ended so it works on 1/2" and 1/4" collets.

I've included the Bosch website if the Amazon link doesn't work.

http://www.amazon.com/BOSCH-S-B-Powe.../dp/B0006BD7VM

http://www.boschtools.com/PRODUCTS/T...spx?pid=RA1150

Chris