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From: Robert Bastow <>
Newsgroups: rec.crafts.metalworking
Subject: Re: 5C collet gripping range
Date: Sat, 09 Oct 1999 17:15:21 GMT

He knows more about collets than you give him credit for.

Best accuracy is + zero to - .002"

Above + five thou will damage the work, below .010" will damage the collet.

1/32 is vandalism!


"David R. Birch" wrote:

> What is the allowable gripping range of a 5C collet that
> doesn't risk springing the collet?  I worked for a former
> Hardinge salesman who thought he was an engineer who thought
> he was a machinist who thought he was a CNC programmer.
> This guy claimed that 5C collets only had a range of +.005",
> but he had been selling them and claiming a narrow range
> meant more collets sold.  The way he ran his company
> suggested he had little knowledge of or talent for
> manufacturing or machining.
> So what increments are best?  1/64?  1/32?
> David

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