Sleeve Coupling Spacer Hub Coupling Size 9 Maximum Speed 3 750 RPM Maximum Torque 2 340 in-lb Outside Diameter 3 5/8 in Bore Type Round Hub Diameter 3 5/8 in Hub Material Cast Iron For Bushing Size Not Applicable Bore Diameter 7/8 in Length through Bore 1 31/32 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