Spur gears are the most common type of gear. The tooth surfaces of spur gear run parallel to the axes of the mounted shafts, and are used in gear pumps, gear motors, marine engines, and more. Another type of gear configuration, a worm drive involves a toothed wheel works with a short revolving toothed cylinder rodd. A bevel gear are two toothed gear shafts that intersect at a 90 degree angle to propel a driveshaft. We also have gear racks, gear drives, speed reducers, and gearmotor accessories.