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 1.4 mm Keyway Width 3 mm Bore Diameter 10 mm Shaft Locking Type Clamp On Bore Type Round Bore with Keyway 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