Spur Gear Bore Diameter 1 in Hub Diameter 2.46 in Hub Projection 0.88 in Face Width 1 1/2 in Pitch Diameter 3 in Material Steel Pressure Angle 14.5 Degrees Compatible Gear Rack Grainger Part Number 1L907 1L908 Compatible Gear Rack Manufacturer Part Number L520-6 L521-6 Diametral Pitch 6 Keyway No