Tire Coupling Hub Angular Misalignment 3 Degrees Coupling Size WE40 Horsepower @ 100 RPM 8.9 hp Maximum Speed 5 000 RPM Bore Type Round Keyed For Bushing Size Not Applicable Maximum Torque 5 500 in-lb Keyway Depth 3/16 in Keyway Width 3/8 in Hub Diameter 6.63 in Parallel Misalignment 0.09375 in Bore Diameter 1 5/8 in Screw Thread Size 5/16 In.-18 Set Screw Location Over Keyway System of Measurement Inch Torsional Stiffness 65 200 in-lb/rad Length through Bore 2 1/2 in