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