In the same kind of products, according to the basic structure of the chain, that is, according to the shape of the element, the parts and parts engaged with the chain, the size ratio between the parts and other aspects of the chain product series. There are many kinds of chains, but their basic structure is only the following, and the rest are variations of these. We can see from the above chain structure, most of the chain is composed of chain plate, chain pin, sleeve and other components. Other types of chains just make different changes to the chain plate according to different needs. Some are installed on the chain plate scraper, some are installed on the chain plate guide bearing, and some are installed on the chain plate roller and so on. These are modified for application in different application occasions. After the chain cleaning and refueling, slowly reverse the tooth disc, and pull out the chain from the back should be able to be straightened. If some chains still maintain a certain Angle, it means that the action is not smooth, which belongs to a dead knot, and should be adjusted. The damaged chain must be replaced in time. It is recommended to strictly distinguish the three kinds of pins and use the connecting pins to maintain the chain. When using the chain beater, pay attention to the evenness, so that the thimble is not easy to get crooked. Careful use of tools can not only protect the tools, but also achieve good results, otherwise the tools are easily damaged, damaged tools are more likely to damage parts, it is a vicious circle.1, the chain includes four series: transmission chain; Conveyor chain; Pulley chain; Special specialty chain 2. A series of often metal links or rings: a chain of often metal links or rings used to obstruct a passage of traffic, as in a street, at the entrance to a river or harbor; A chain for mechanical transmission; 3, the chain can be divided into short pitch precision roller chain; Short pitch precision roller chain; Bent plate roller chain for heavy duty transmission; Cement machinery chain, plate chain; High strength chain