In article ,
Joe wrote:
(Contrary to
intuition, for the typical jacobs chuck, the jaws should be extended
slightly out of the adjustment sleeve, and the jaws struck, rather
than the sleeve.)

First time I've ever heard this... What's the logic behind it?
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Regards,
Joe Agro, Jr.
http://www.autodrill.com
http://www.multi-spindle-heads.com

V8013

My eBay: http://tinyurl.com/4hpnc



The jaws are through hardened and can take a reasonable hammer blow.
The sleeve is only held on the chuck by a press fit and pounding on it
can move it towards the back of the chuck. There is nothing to stop it
from being pressed on too far. If this happens the chuck key will not
fit. Ball-bearing chucks and the multicraft line may be different, I
have never rebuilt any of those..

At any rate, you probably wouldn't have any problems with a
"reasonable" hammer blow no matter where you hit the chuck.




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Larry Wasserman Baltimore, Maryland