Check old posts by "brownnsharp" for a good technique to adjust
trueness of jaws.

brownnsharp

Arcady wrote:
Hi,

I have small 2" lathe chuck with jaws out of true. Whole assembly is running fine with
only 2 thou but jaws need to be turned internally (current indicator gives me 0.025").
Is there any body nearby willing to help? For this one I don't need anything better than
few thou (jaws are aluminum) but lathe should be able to reach into 10 mm hole and lock
the 2" assembly and maybe 1" locking ring should be made to turn the thing properly. Maybe
somebody just know local machine shop where it could be done for few bucks? Whole Santa
Clara County will do.

Here is the pic of this chuck:
http://s89568048.onlinehome.us/images/044.JPG

Thanks,
Arcady