Application is required for any products, especially for synchronous belt such as an important device in the device to use the product, but also in many respects, have very strict requirements, need to fully comply with the requirements of the device, can fully meet the requirements, application performance can be obtained by the will is very good. Such as requiring the device has good stability, and can be used in the structure of the medium and long term stable state. Requires synchronization with good stability, because of the application of kagyu device, regardless of their to any type of problem with the structure of its direct impact on application effect and application security. So the demands of its, have related properties in terms of structure, especially need the structure state, long-term stability can be reliable function in the application, this can be achieved by the application of performance is very good. That is to say, because of the synchronous belt need by gear with the overall structure to bite, and give play to the role of the transmission, makes the mechanical equipment can run normally. Once the structure damage or deformation of this kind of phenomenon, will directly affect the its normal occlusion with gear, and then appear fall off bite instability etc. Bad phenomenon. So to have a good stability, and promote its used in applications with stable and reliable operation, the functional reliability assurance.