Sleeve Coupling Spacer Hub Coupling Size 10 Maximum Speed 3 600 RPM Maximum Torque 3 735 in-lb Outside Diameter 4 3/8 in Bore Type Round Hub Diameter 4 3/8 in Hub Material Cast Iron For Bushing Size Not Applicable Bore Diameter 1 1/8 in Length through Bore 2 11/32 in System of Measurement Inch Hub Body Length Not Applicable Hub Type Spacer Hub Application Compressors Conveyors Motors Pumps Bore Tolerance +0.0005 in / +0.0015 in