3 jaw lathe chuck
 

hi i'm after a 3 jaw chuck to fit our large old mitchell lathe, needs to be approx 3.5 inches over the spindle threads and 2.5 inches up the spout, i have a spare back plate thats 8 inches diameter bolt spacing. (4 off) but ideally a chuck i can just screw on if anyones got one spare or laying about, im getting tired of having to put a 4 jaw in the 4 jaw!