Tire Coupling Hub, Size - Tire Couplings WE50, Bore Type - Couplings Fixed Bore, Bore Dia. 2-1/8 In., Outside Dia. 8.13 In., Length through Bore 2.750 In., Rated Torque (In.-Lb.) 7650, Max. RPM 4200, Keyseat Size (In.) 1/2 x 1/4, Width (In.) 2.75, Height (In.) 8.13, Material of Construction Low Carbon Steel, Setscrew Location One Over Keyway, Max. Angular Misalignment 3 Degrees , Ideal For Numerous Industrial Applications, Including Pumps, Motors, Compressors