Motion Control Coupling Hub Angular Misalignment 0.5 Degrees Axial Motion 0.006 in Coupling Size OCT21 Outside Diameter 1.313 in Over-Standard Parallel Misalignment 0.131 in Parallel Misalignment 0.008 in Coupling Overall Length 1.875 in Hub Material Aluminum Length through Bore 0.59 in System of Measurement Inch Bore Diameter 5/16 in Maximum Speed 4 500 RPM Bore Type Round Shaft Locking Type Clamp On Keyway Depth Not Applicable Keyway Width Not Applicable