Roller chain is a type of power transmission chain that is commonly used in conveyor systems. Roller chains consist of a series of cylindrical rollers that are connected by pins and links. The rollers are free to rotate on the pins, allowing the chain to move smoothly over sprockets or other components. In conveyor systems, roller chains are typically used to move heavy loads over long distances. The chain is looped around sprockets at either end of the conveyor, and the rollers on the chain engage with the sprocket teeth, causing the chain to move. Roller chains are available in a variety of sizes and configurations, including single-strand, double-strand, and triple-strand. They can be made from a range of materials, including steel, stainless steel, and plastic. The selection of chain type and material will depend on the specific requirements of the conveyor system, such as load capacity, speed, and environment.