I have had no luck with milling jaws. I grind them by eye, and with round stock chucked up, I put the
jaw I just ground, back in,get a measurement with a feeler gage, tweek it some more till it is flat,
to the stock and do the other three. Even if one is ground a little more, 4Jaws (independant) dont
care. 3 Jaw, whole different ballgame. My chuck Im talking about is 70Yrs old and was a school
lathe so??? Now its back to normal. If this helps, the old man insisted on rapping a brown paper
bag strip around the work on all machines, and its gotta be, "brown" bag, something to do with
a clay content. Common problem is drilling, sometimes pushing the stock right into the headstock
no matter how tight you tighten it, the brown bag stops that, the slipping is no good for jaws.
Right or wrong grinding jaws works for me.
