Spur Gear Bore Diameter 7/8 in Hub Diameter 1.81 in Hub Projection 0.75 in Face Width 1 1/4 in Pitch Diameter 2.25 in Material Steel Pressure Angle 14.5 Degrees Compatible Gear Rack Grainger Part Number 1L905 1L906 Compatible Gear Rack Manufacturer Part Number L518-6 L519-6 Diametral Pitch 8 Keyway No