Generally speaking, the synchronous belt teeth have two types of trapezoidal teeth and arc teeth, and there are three series of arc teeth: arc teeth, flat top arc teeth and concave top parabolic teeth. The trapezoidal tooth synchronous belt is divided into two kinds of single-sided and double-sided teeth, referred to as single-sided and double-sided tape. The double-sided belt is divided into symmetrical tooth type and staggered tooth type according to the arrangement of teeth. The trapezoidal tooth synchronization comes with two dimensions: pitch system and modular system.

In addition, except for the curved tooth shape, the structure of the arc tooth synchronous belt is basically the same as that of the trapezoidal tooth synchronous belt, the pitch of the belt is equal, and the tooth height, root thickness and root fillet radius are larger than that of the trapezoidal tooth. After loading, the stress distribution state is better, the stress concentration of the root of the tooth is gentle, and the bearing capacity of the tooth is improved. Therefore, the arc tooth synchronous belt transmits more power than the trapezoidal tooth synchronous belt, and can prevent tooth interference in the process. The arc tooth synchronous belt has good wear resistance, low noise during operation, no need for lubrication, and can be used in harsh environments with dust. It has been widely used in food, automobile, textile, pharmaceutical, printing, paper and other industries.