Martin stock spur gears are available in five different styles. Steel gears are furnished in plain style and plain style with hub. Cast gears are furnished, plain with hub, web with lightening holes, and spoke. Cast gears are machined on all operating surfaces. Martin cast gears are cast with a larger hub to provide extra strength and to allow for larger bores. Spur gears are stocked in both 14-1/2 and 20 deg pressure angles. Martin Stock Spur Gear, External Tooth Reborable, 5/8 to 1-1/2 in Bore Dia, 4.166 in Outside Dia, 48 Teeth, 12 Diametral Pitch, 4 in, 3/4 in Face Width, Type B, 2-1/2 in Hub Dia, 3/4 in Hub Projection, 1-1/2 in Overall Length, 14.5 deg Pressure Angle, Steel