Jaw Coupling Hub Coupling Size MJC57 Outside Diameter 57.2 mm Coupling Overall Length 80 mm System of Measurement Metric Hub Material Aluminum Maximum Speed 8 000 RPM Keyway Depth 3.3 mm Keyway Width 8 mm Bore Diameter 25 mm Shaft Locking Type Clamp On Bore Type Round Bore with Keyway Jaw Profile Curved Screw Thread Size M6 Bore Tolerance +0.05/-0.00 mm Fail Safe Yes Shaft Tolerance +0.000/-0.013 mm Full Bearing Support Required Yes Hub Diameter 57.2 mm