Top roller chain is used primarily in the automotive and precision equipment industries for free flow conveyance. It is based on the standard chain with extended side plates. These are installed on the pins that connect SK-1 extended plates. Pallets with conveyed objects are loaded on the top rollers. They are made up of stainless steel, carbon steel, or plated carbon steel. These are available with R-rollers and with S-rollers. R-rollers is preferred, especially with the condition that overall length of the equipment is more than 10 m and the chain speed is more than 20 m/min. It has the feature of high maximum allowable tension and economical cost.