SKF Double Pitch Roller Chains are produced in accordance with the ASME/ANSI B29.3 (transmission series) and B29.4 (conveyor series) American roller chain standards. In general, these chains are dimensionally similar to ASME/ANSI standard products except that the pitch is double. They are available in the transmission and conveyor series with standard sized rollers, and additionally with large (oversize) rollers in the conveyor series. These chains are an economical choice for low speeds, moderate loads, and long centre distance drive applications including a variety of conveyor systems and material handling equipment.