5 Dia. South Bend SBL 3-Jaw Lathe Chuck 9 10K with 1-1/2 x 8tpi Mount PT4352-1 October 3, 2023 admin Nice original SBL 3-jaw self-centering lathe chuck with a 4-7/8″ actual diameter and a 1-1/2″ x 8tpi threaded mount. Jaws are not reversible and the 5/16 square key is not included. Share