Jaw Coupling Hub; 1/2" Bore; 1-3/4" Hub Dia; Jaw Coupling; Hub; Shaft; Finished Bore; No Keyway; 1.75" Outside Diameter; 0.82" Length Thru Bore; L075 Size or Series; Set Screw; Sintered Iron; 11000 Maximum Speed; NBR 90 | Hytrel/Bronze 227 | Urethane 135In-Lbs Torque