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From: "Jim Wilkins" <muratlanne@gmail.com>
Newsgroups: rec.crafts.metalworking
Subject: Re: 3/8" drill chuck replacement
Date: Thu, 10 Apr 2025 22:09:01 -0400
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BP wrote in message news:vt9kpt$3mlh$1@dont-email.me...


Still, in-person transactions aren't foolproof, at least when I'm the
fool. Went to a local Ace store and asked for a chuck key to fit a
3/8" Jacobs chuck with a 15/64ths (0.234") pilot. The pilot's right,
fits just fine. but the pinion gear is too big.

It's a nice bike ride to return it and I don't think they'll give me
much pushback if i want to exchange it for the right part, but that
was a one star deal too.

Thanks for writing!

bob prohaska
--------------------------
Is the K number of the key stamped in tiny letters on the chuck?

If you find one with the right gear but too small a pilot you could sleeve 
it with hobby store brass tubing, stretched to almost fit and pressed on.