Jaw Coupling Hub Coupling Size MJC51 Outside Diameter 50.8 mm Coupling Overall Length 61 mm System of Measurement Metric Hub Material Aluminum Maximum Speed 8 000 RPM Keyway Depth Not Applicable Keyway Width Not Applicable Bore Diameter 25 mm Shaft Locking Type Clamp On Bore Type Round Bore Jaw Profile Curved Screw Thread Size M5 Bore Tolerance +0.05/-0.00 mm Fail Safe Yes Shaft Tolerance +0.000/-0.013 mm Full Bearing Support Required Yes Hub Diameter 50.8 mm