Spur gears certainly are a type of cylindrical equipment, with shafts that are parallel and coplanar, and teeth that are directly and oriented parallel to the shafts. They’re arguably the easiest and most common type of gear – simple to manufacture and suitable for an array of applications.
One’s teeth of a spur gear possess an involute profile and mesh one tooth at the same time. The involute form means that spur gears only produce radial planetary gearbox forces (no axial forces), however the method of tooth meshing causes high pressure on the gear tooth and high noise production. Due to this, spur gears are usually used for lower velocity applications, although they can be utilized at almost any speed.