The chain is usually a metal link or ring, which is mostly used for mechanical transmission and traction. A chain, as in a street, river, or harbor entrance, used to obstruct a passage of traffic.

1. The chain includes four series: transmission chain, conveyor chain, drag chain and special professional chain

2. A series of often metal links or rings: chains used to obstruct traffic (as in streets, rivers, or harbors); chains used for mechanical transmission;

3. The chain can be divided into short pitch precision roller chain, short pitch precision roller chain, heavy load transmission bending roller chain, cement machinery chain, plate chain, high-strength chain.

According to different purposes and functions, the chain can be divided into four types: transmission chain, conveying chain, traction chain and special chain.

1. Transmission chain: mainly used to transmit power chain.

2. Conveying chain: mainly used for conveying materials.

3. Hauling chain: mainly used for hauling and lifting chain.

4. Special special chain: mainly used for the chain with special function and structure on special mechanical device.

In the same kind of products, according to the basic structure of the chain, i.e. according to the shape of the components, the parts and parts meshed with the chain, the size proportion between the parts, etc., the chain product series is divided. There are many kinds of chains, but their basic structure is only the following, others are all these kinds of deformation. We can see from the above chain structures that most of the chains are composed of chain plate, chain pin, shaft sleeve and other components. Other types of chain only make different changes to the chain plate according to different requirements. Some of them are equipped with scraper on the chain plate, some of them are equipped with guide bearings on the chain plate, and some of them are equipped with rollers on the chain plate, etc., which are all for the purpose of refitting in different application occasions.