Jaw Coupling Hub Coupling Size MJC25 Outside Diameter 25.4 mm Coupling Overall Length 35.3 mm System of Measurement Metric Hub Material Aluminum Maximum Speed 8 000 RPM Keyway Depth Not Applicable Keyway Width Not Applicable Bore Diameter 12 mm Shaft Locking Type Clamp On Bore Type Round Bore Jaw Profile Curved Screw Thread Size M3 Bore Tolerance +0.05/-0.00 mm Fail Safe Yes Shaft Tolerance +0.000/-0.013 mm Full Bearing Support Required Yes Hub Diameter 25.4 mm