1. Transmission Chains
Power transmitting transmission chain chains are 
categorized into six major groupings.
1.1 Standard Roller Chains. These chains are designed for general usage.
1.2 High Performance Chains. These chains have higher tensile power and greater fatigue power.
1.3 Lube-Totally free Chains. These chains have longer put on life than regular chains without lubrication.
1.4 Environmentally Resistant Chains. Chains with special 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 many types of chains available