Spur gears are a type of cylindrical equipment, with shafts that are parallel and coplanar, and the teeth that are straight and oriented parallel to the shafts. They’re arguably the easiest and most common type of gear – simple to manufacture and ideal for an array of applications.

One’s teeth of a spur gear have an involute profile and mesh one tooth at the same time. The involute type means that spur gears only generate radial forces (no axial forces), however the method of tooth meshing planetary gearbox causes high stress on the gear teeth and high noise creation. For this reason, spur gears are usually used for lower swiftness applications, although they can be utilized at almost any speed.