1. Transmission Chains
Power transmission transmission chain Chains are classified into six major organizations.
1.1 Standard Roller Chains. These chains are made 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 regular 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 several types of chains available