SOUTH BEND 9 & 10K 6 4-JAW LATHE CHUCK 4006-56 SKINNER 1-1/2-8 TPI Back Plate July 17, 2023 admin SOUTH BEND 9″ & 10K 6″ 4-JAW LATHE CHUCK 4006-56 SKINNER 1-1/2-8 TPI Back Plate. Used condition with dings dents and scratches, chuck has some staining and surface rust spots. No key wrench with this chuck. Please see photos for details. Share