Sleeve Coupling Spacer Flange Coupling Size 4 Maximum Speed 7 600 RPM Maximum Torque 156 in-lb Outside Diameter 2 in Bore Type Round Keyed Hub Diameter 2 in Hub Material Cast Iron For Bushing Size Not Applicable Bore Diameter 1 1/8 in Length through Bore 1 1/16 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