It can be seen from the above chain structures that most chains are composed of chain plate, chain pin, shaft sleeve and other components. Other types of chains only have different changes to the chain plate according to different needs. Some have scraper plates on the chain plate, some have guide bearings on the chain plate, and some have rollers on the chain plate. These are all modifications for different applications.

Chains are usually metal links or rings, which are mostly used for mechanical transmission and traction. A chain (as in a street, river, or entrance to a harbor) used to obstruct traffic. The chain can be divided into short pitch precision roller chains; Short pitch precision roller chain; Curved roller chains for heavy duty drives; Chain for cement machinery, plate chain; High strength chain.