If we combine the rollers from a gravity conveyor with the chains of a chain driven system, we can link the rollers. Add a motor and gearbox and now we have a live roller conveyor or chain driven live roller system. Sometimes people in the industry use the acronym CDLR. They are members of the floor conveyor family, and they are heavy duty material handling systems. Use them to transport pallets, seats (on skids or pallets), tires and containers. Chains are linked together from one roller to the next on the side. Learn more about them here