Jaw Coupling Hub; 1-5/8" Bore; 3-11/32" Hub Dia; Jaw Coupling; Hub; Shaft; Finished Bore; Keyway; 3.344" Outside Diameter; 2.5" Length Thru Bore; L110 Size or Series; Set Screw; Steel; 3600 Maximum Speed; Buna-N 3600In-Lbs Torque