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

1.1 Standard Roller Chains. These chains are designed for general usage.
1.2 High Performance Chains. These chains have higher tensile strength and greater fatigue power.
1.3 Lube-Free Chains. These chains have longer use life than regular chains without lubrication.
1.4 Environmentally Resistant Chains. Chains with transmission chain 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