Aqua-Proof Self Lube Roller Chain BS | Single Pitch | Anti Corrosion | Lube Free | AP SLR “AP SLR” type roller chains are designed to ensure both corrosion resistance and self lubrication. All of the components except the oil-impregnated bushings are treated with the dual layer coat treatment process before the chain is assembled to insure maximum protection. “AP SLR” type roller chain is lubricated prior to delivery. Plate Thickness The thickness of the intermediate plate of the multiple strand 08B AP SLR chain is 1.25mm. Connecting links are “cotter” style for all sizes above 20B AP SLR. Consult SUGIYAMA for offset links. Service life decreases dramatically if the lubricant in the oil-impregnated bushings is depleted. The lubrication in the oil-impregnated bushings will seep out rapidly when the operating temperature exceeds 70°C. A wet or dusty environment may lead to premature wearing. It is not recommended for applications which are exposed to chemicals or water, or associated with a shock load. Do not use Aqua-Proof chains in applications where chain may come in direct contact with food or where coating flakes or wear dust can contaminate food.