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Newsgroups: rec.crafts.metalworking
Subject: Re: Help machining ball holding collet
From: Robert Bastow <>
Date: Tue, 21 Sep 1999 05:38:54 GMT

My sentiments entirely Tony..PLUS, I might add:

If the collet is less than 1/2 diameter won't hold!

If it is greater than 1/2 dia deep..How do you get the ball in?  And once it is the monkey's fist..How do you get it out??

A cylindrical recess a little deeper than 1/2 diameter will hold the sphere firm
enough for any operation.


tonyp wrote:
> Mark Fullerton  wrote in article
> <
> > I would like to machine a collet that will hold a steel ball bearing.
> > I am having trouble figuring out how to machine the inside of the collet
> to a
> > perfect sphere.
> Mark, why would you WANT to?  You'd never get perfect contact over the
> whole spherical surface unless you matched the radii EXACTLY.

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