Tire Coupling Hub Angular Misalignment 4 Degrees Coupling Size WE5 Horsepower @ 100 RPM 1.5 hp Maximum Speed 7 500 RPM Bore Type Round For Bushing Size Not Applicable Maximum Torque 925 in-lb Keyway Depth Not Applicable Keyway Width Not Applicable Hub Diameter 3.13 in Parallel Misalignment 0.0625 in Bore Diameter 3/4 in Screw Thread Size 3/8 In.-16 Set Screw Location Inside System of Measurement Inch Torsional Stiffness 9 820 in-lb/rad Length through Bore 1 3/4 in