Motion Control Coupling Hub Angular Misalignment 0.5 Degrees Axial Motion 0.006 in Coupling Size OCC21 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 1/2 in Maximum Speed 4 500 RPM Bore Type Round Keyed Shaft Locking Type Clamp On Keyway Depth 1/16 in Keyway Width 1/8 in Screw Seating Torque 2.1 N-m