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 Not Applicable Keyway Width Not Applicable Bore Diameter 20 mm Shaft Locking Type Clamp On Bore Type Round Bore 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