Sprocket is a mechanical transmission device, mainly used to transmit power and rotary motion. It is composed of multiple gears, each gear has a certain number of teeth, and the teeth transmit motion through meshing. Sprockets are usually made of metal materials, which have high strength and wear resistance. Sprockets are widely used and can be found in various mechanical equipment and tools. Several main uses of the sprocket will be described in detail below. Sprockets are often used in transmission systems. For example, on a bicycle, the chain transfers the rider's pedaling force through engagement with the sprocket to drive the wheel to rotate. The size and number of teeth of the sprocket can be adjusted as needed to achieve different speeds and torque outputs.