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Posted to rec.crafts.metalworking
Norm Dresner
 
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Default How are chuck keys sized

I decided to get a new chuck key for my DP and, not knowing any better, went
to the Enco site. Well, I didn't buy my DP or its chuck from Enco so I
can't match any of their letter-sizes to what I have.

What is the normal method for specifying a chuck key size? Isn't it the
diameter of the pilot hole?

TIA
Norm