“HP” type chains are constructed with cold-forged solid bushings. This process assures that the inside diameter of the bushing’s hollow center is completely cylindrical all the way through. This unique hollow pin feature allows for easy insertion of cross rods without damaging the chain or rods.
Roller Type "S" indicates a bushed chain which made without rollers. Roller Type "R" indicates an oversized carrier roller. Roller Type "R" can be manufactured with plastic oversized carrier rollers.