I don't have a direct threaded chuck but if memory serves me right, where it is threaded, that is part of the main casting,so the set screw hole can't be changed in relation to the cut out on the rim of the chuck body. Before I returned it, I would put the allen head set screw in the hole and use a ball end hex key for tightening and see how it works on the lathe.
Last edited by Don McLeod; 01-28-2013 at 7:54 PM.
Yeah. I can't use the screw on my SN2s because it would tighten directly onto the back threads on my Jet 1642 (though I don't use the screw anyway). It does not get back far enough to reach the flat on the spindle behind the threads, and I am cretainly not going to sacrifice a thread on this spindle (which is already a bit short for my preference).