Copper Gear

Spur gears are gears that drive between two parallel shafts, and are also easily imagined and common gears. Since the tooth flanks are parallel to the axis of the assembly shaft, spur gears generate no thrust (axial force) in the gearbox. In addition, due to the simple processing of spur gears, gears with high precision can be manufactured.
A common unit for representing gear size is the modulus. The same reasoning applies. In addition, in recent years, the pressure angle is a common factor in determining the inclination angle of gear teeth. In addition, the widely used gear teeth in industrial machinery are involute teeth, that is, a part of the involute curve is used as a gear.