1. Transmission Chains
Power transmitting chains are classified into six major organizations.
1.1 Standard Roller Chains. These chains are designed for general usage.
1.2 POWERFUL Chains. These chains have higher tensile power and greater fatigue power.
1.3 Lube-Free Chains. These chains have longer put on life than standard chains transmission chain without lubrication.
1.4 Environmentally Resistant Chains. Chains with special 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 several types of 
chains available