Chain coupling is a coupling with superior performance, called roller chain coupling in full, and is widely used in fluid machinery 

and transportation equipment. There are two standards commonly used in the domestic market. The first one comes from the 

Japanese standard [JIS B 1456], which is our common KC series coupling. The biggest feature of this standard is that the length of 

the shaft hole is standardized, that is, the shaft hole length is standardized. The hole length is fixed. The second standard is the 

national standard [GB6069], which is the GL series roller chain coupling. The two standard structures are similar and both can be 

equipped with dustproof covers.

The roller chain coupling has a simple structure (composed of four parts), easy assembly and disassembly, no need to move the 

two connected axes during disassembly, compact size, light weight, certain compensation capabilities, low installation accuracy 

requirements, and reliable operation , longer life, lower cost and other advantages