Jaw Coupling Hub Coupling Size MJC19 Outside Diameter 19.1 mm Coupling Overall Length 27.2 mm System of Measurement Metric Hub Material Aluminum Maximum Speed 8 000 RPM Keyway Depth Not Applicable Keyway Width Not Applicable Bore Diameter 6 mm Shaft Locking Type Clamp On Bore Type Round Bore Jaw Profile Curved Screw Thread Size M2.5 Bore Tolerance +0.05/-0.00 mm Fail Safe Yes Shaft Tolerance +0.000/-0.013 mm Full Bearing Support Required Yes Hub Diameter 19.1 mm