V-belt is a kind of mechanical equipment used to transmit force and transport goods. It has the advantages of convenient installation, small floor space, high transmission efficiency and low noise. Its cross-sectional shape and size can be divided into ordinary V-belt, narrow V-belt, wide V-belt and multi-wedge belt. According to the belt structure, it can be divided into winding V-belt and trimming V-belt. According to the belt core structure, it can be divided into rope core V belt and rope core V belt. Mainly used for power transmission of mechanical equipment driven by motors and internal combustion engines.

B-belt refers to B-type V-belt, which is one of the two types of common V-belt. There is a vertical line at the top of the V-belt. Belt B is an isosceles trapezoid with trapezoid sides, with an upper bottom of about 2.3 cm and a lower bottom of about 2.7 cm. B belt is an important part in industry, and its quality is directly related to the efficiency and accuracy of equipment operation. It is an irreplaceable important component in the transmission system, mainly used in automobiles, motorcycles and grinders.