Jaw Coupling Hub Coupling Size MJC41 Outside Diameter 41.3 mm Coupling Overall Length 53 mm System of Measurement Metric Hub Material Aluminum Maximum Speed 8 000 RPM Keyway Depth 1.8 mm Keyway Width 4 mm Bore Diameter 12 mm Shaft Locking Type Clamp On Bore Type Round Bore with Keyway Jaw Profile Curved Screw Thread Size M4 Bore Tolerance +0.05/-0.00 mm Fail Safe Yes Shaft Tolerance +0.000/-0.013 mm Full Bearing Support Required Yes Hub Diameter 41.3 mm