1. Transmission Chains
Power transmission chains are categorized into six major groupings.
1.1 Regular Roller Chains. These chains are designed for general usage.
1.2 POWERFUL Chains. These chains possess higher tensile power and greater fatigue strength.
1.3 Lube-Totally 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 Specialty Chains, Type 1. For particular transmission chain applications.
1.6 Specialized Chains, Type 2. For general designs.
Within these six groups, 
there are several types of chains available