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...