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

One’s teeth of a spur gear have got an planetary gearbox involute profile and mesh one tooth at a time. The involute form implies that spur gears only produce radial forces (no axial forces), but the method of tooth meshing causes high stress on the gear teeth and high noise creation. Because of this, spur gears are usually used for lower acceleration applications, although they can be used at almost any speed.