Motion Control Coupling Hub Angular Misalignment 0.5 Degrees Axial Motion 0.004 in Coupling Size OST12 Outside Diameter 0.75 in Over-Standard Parallel Misalignment 0.075 in Parallel Misalignment 0.008 in Coupling Overall Length 0.875 in Hub Material Aluminum Length through Bore 0.3 in System of Measurement Inch Bore Diameter 3/16 in Maximum Speed 4 500 RPM Bore Type Round Shaft Locking Type Set Screw Keyway Depth Not Applicable Keyway Width Not Applicable