Roller conveyor, is a type of equipment that uses freely rotating rollers arranged at certain intervals to convey unit loads. It is one of the most common and fundamental conveying methods in automated production lines and logistics systems. Items move on the rollers relying on their own gravity or external force. When the roller axes are perpendicular to the conveying direction, items are propelled forward by friction. By changing the arrangement of the rollers, various functions such as straight lines, curves, diverging, and merging can be achieved. With its excellent modular characteristics, flexible layout capabilities, and wide load adaptability, the roller conveyor has become the "skeleton" and "joints" connecting various production processes and building automated logistics systems. When selecting one, it is necessary to comprehensively decide the most suitable drive method and roller specifications based on item characteristics, conveying requirements, process layout, and environmental conditions.