Note: In addition to the models in the table, other types and sizes of speed change belts can be produced. For the pitch length of the speed change belt, please refer to the Selection Table of the Pitch Line Circumference of the Speed Speed Belt

       For ordinary V-belts, if m = 0.3, the average mv = 0.51 = 1.7m . Under other conditions being the same, the working capacity of V-belt drive is much improved than that of flat-belt drive.
Narrow V-belt drive is a V-belt drive that has been widely used internationally in recent years. The load-bearing layer of the belt adopts synthetic fiber rope or steel wire rope. The height to section width ratio of ordinary V-belt is 0.7, and the ratio of narrow V-belt height to section width is 0.9. The narrow V is available in SPZ, SPA, SPB and SPC models, the structure and related dimensions have been standardized. Narrow V-belt with high load-carrying capacity and low hysteresis loss. The maximum allowable speed of the narrow V-belt drive can reach 40～50m/s, which is suitable for the drive with high power and compact structure.

Combined V-belt drive

       It features several identical V-belts joined together at the top to form a single V-belt. It overcomes the uneven force between the two belts of the ordinary V-belt, reduces the lateral vibration of each single belt drive, and thus increases the life of the belt. The disadvantage is that it requires high manufacturing and installation accuracy.