Tire Coupling Hub Angular Misalignment 3 Degrees Coupling Size WE40 Horsepower @ 100 RPM 8.9 hp Maximum Speed 5 000 RPM Bore Type Round For Bushing Size Not Applicable Maximum Torque 5 500 in-lb Keyway Depth Not Applicable Keyway Width Not Applicable Hub Diameter 6.63 in Parallel Misalignment 0.09375 in Bore Diameter 1 in Screw Thread Size 5/8 In.-11 Set Screw Location Inside System of Measurement Inch Torsional Stiffness 65 200 in-lb/rad Length through Bore 2 1/2 in