1. Transmission Chains
Power transmission chains are classified into six major transmission chain organizations.

1.1 Regular Roller Chains. These chains are designed for general usage.
1.2 High Performance Chains. These chains possess higher tensile strength and greater fatigue strength.
1.3 Lube-Free Chains. These chains have longer use life than standard chains without lubrication.
1.4 Environmentally Resistant Chains. Chains with particular corrosion resistance.
1.5 Specialized 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