Tire Coupling Hub, Size - Tire Couplings WE20, Bore Type - Couplings Fixed Bore, Bore Dia. 1-1/8 In., Outside Dia. 4.48 In., Length through Bore 2.060 In., Rated Torque (In.-Lb.) 2300, Max. RPM 6600, Keyseat Size (In.) 1/4 x 1/8, Width (In.) 2.06, Height (In.) 4.48, 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