Jaw Coupling Hub Coupling Size JS36 Outside Diameter 2 1/4 in Coupling Overall Length 3 5/32 in System of Measurement Inch Hub Material Aluminum Maximum Speed 8 000 RPM Keyway Depth 3/32 in Keyway Width 3/16 in Bore Diameter 5/8 in Shaft Locking Type Set Screw Bore Type Round Bore with Keyway Jaw Profile Curved Screw Thread Size M8 Bore Tolerance +0.002/-0.000 in Fail Safe Yes Shaft Tolerance +0.0000/-0.0005 in Full Bearing Support Required Yes Hub Diameter 2 1/4 in