Chain Coupling Sprocket Chain Number 50 Bore Diameter 1 1/2 in Bore Type Split Taper Bushing Horsepower @ 100 RPM 7.86 hp Outside Diameter with Chain 3.65625 in Hub Diameter 2 7/16 in For Bushing Size H For Chain Pitch 5/8 in Keyway Depth Not Applicable Keyway Width Not Applicable Maximum Angular Misalignment 1 Degrees Number of Teeth 16 Parallel Misalignment 0.005 in System of Measurement Inch Axial Motion 0.06 in For Cover Part Number AL50