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LARTMAN
10-27-2014, 03:11 PM
I just joined this site and am in need of some advice.

I have recently acquired a Graziano SAG-12 and it came with the 3 jaw chuck mounted on the machine plus a 4 jaw chuck and a collet closer attachment. My question is, what is the procedure for changing the chucks? I bought a copy of the factory manual but this procedure is not addressed.

There is an exploded view of the spindle assembly showing eccentric pins with locking screws which I have toyed with but I don't want to force anything without knowing the correct procedure.

EddyCurr
10-27-2014, 06:05 PM
Welcome.

According to your description and supported by information
about Graziano lathe models at http://www.lathes.co.uk/graziano/,
the SAG 12 utilizes a D1-4 Camlock system for the chuck.

The following document was created for the Smithy Granite series
of lathes but I believe there will be little dissent about recommending
it to you as a guide for removal, adjustment and mounting the D1-4
chucks supplied with your SAG 12.

"Adjusting The Chuck Mounting Studs on the GN1324 And The GN1340"
http://www.home-machine-shop.com/Smithy-Support-Files/operation/camlock_adjust.pdf

Do not neglect to place wood under the chuck to protect the
ways - especially for your first attempt at chuck removal.
Ideally, there should be little gap between the bottom of
the chuck and the top of the wooden way protector. Be
mindful of pinching fingers under the chuck.

If in doubt, ask more questions. A deadblow hammer, wood
mallet or similar object might help free a chuck bound by dried
fluids, but force is not called for.

LARTMAN
10-28-2014, 03:05 PM
Thanks, I was on the right track, just needed a couple of taps with a dead blow and it was sitting on the wood block. The download link was very helpful for the adjustment procedure also. I just needed the encouragement to pick up the hammer.