Internal Gears


Our internal gears are spur gears that turn “inside out”. In other words, cut the teeth into the inner diameter while the outer diameter remains smooth. This design allows the drive pinion to rotate inside the gear, enabling cleaning operations. These gears are for light-duty applications and are only available in brass. When choosing a matching spur gear, always remember that the difference in the number of teeth between the internal gear and the pinion should not be less than 15 (14 1/2° PA) or 12 (20° PA).

Product Features

  • Available in 14 1/2° and 20° PA, our internal gears are designed to fit a wide range of equipment.
  • Made of brass, these gears are ideal for various light-duty applications – and are cost-effective.
  • Their non-binding tooth design ensures smooth, quiet operation.
  • Pitch diameters from 1″ to 6″