Development of science and technology to make each product has a fair opportunity of development, because all the time in the development of science and technology, so the products as long as the rapid acceptance of the development of science and technology, can be on the road to development is in the lead. On this issue, the synchronous belt development is consistent and other products, so synchronous belt what changes are needed to adapt to the demand. Synchronous belt transmission is composed of a root of tooth surface with spacing within weeks of circular belt and with appropriate match round. It combines belt transmission, chain and gear drive their respective advantages. Turns, with toothed wheel tooth mesh to transmit power. With accurate synchronous belt transmission gear ratio, no slip, constant speed ratio can be obtained, is stable and can absorb vibration, little noise. General can reach 98%, high transmission efficiency, compact structure, and is suitable for multiple spindle drive, without lubrication, no pollution, so there is no pollution and can work in environment is relatively bad places. But that's not enough, synchronous belt also need to make a change. Now mechanical products are in constant updates, applications in machinery parts, of course also need to mechanical changes on rhythm. As people often use mobile phones, the iphone 5 also didn't buy, Iphone6 is out. In these changing products, any one of the parts are needed to make changes, or product? What is the difference between two generations. Synchronous belt wheel in many mechanical also occupies a very important position, in order to be able to still maintain our position in modern machinery, you need to constantly change for them. In modern mechanical, they are generally required components can have high precision, work is very stable, strong sex, more simple structure, environmental polluting the environment, energy conservation is not a waste of resources, etc. Today's synchronous belt wheel already have these requirements, so can be widely used in the new machinery. Synchronous belt wheel manufacturer at the time of making products, in order to keep it running quite high strong sex, had riveting the retaining ring to it. And in riveting even when considering the location of the riveting, and their quality and strength. To the retaining ring (solid rivet in synchronous belt wheel, manufacturers are also on opposite sides of the synchronous belt wheel circumference, create 9 o 'V' groove. This is to strengthen the riveting can not affected by extrusion, a very symmetrical shape.