Roller chains make the world go ’round . These hard-working chains support the machines that drive vehicle assembly lines, harvest wheat, and transmit power in conveyor systems of all sorts. roller chains have been a primary driver of industrial growth. These versatile chains also can be used in hoisting heavy loads, or you can add attachments that provide them with special functionalities for transport. They are sturdy, reliable and cost-effective, but you know immediately when your chain becomes slack or breaks as it can cause an immediate breakdown and halt work. When this happens, it’s crucial to quickly identify and order the exact chain that you need for your project.