Tire Coupling Hub Angular Misalignment 4 Degrees Coupling Size WE2 Horsepower @ 100 RPM 0.3 hp Maximum Speed 7 500 RPM Bore Type Round For Bushing Size Not Applicable Maximum Torque 190 in-lb Keyway Depth Not Applicable Keyway Width Not Applicable Hub Diameter 1.85 in Parallel Misalignment 0.0625 in Bore Diameter 1/2 in Screw Thread Size 3/8 In.-16 Set Screw Location Inside System of Measurement Inch Torsional Stiffness 3 170 in-lb/rad Length through Bore 15/16 in