1. Transmission Chains
Power transmitting transmission chain Chains are classified into six major groups.
1.1 Regular Roller Chains. These chains are created for general usage.
1.2 High Performance Chains. These chains possess higher tensile power and greater fatigue strength.
1.3 Lube-Free 
Chains. These chains have longer wear life than standard chains without lubrication.
1.4 Environmentally Resistant Chains. Chains with particular corrosion resistance.
1.5 Specialized Chains, Type 1. For specific applications.
1.6 Specialized Chains, Type 2. For general designs.
Within these six groups, there are many types of chains available