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