Stainless steel guide rollers with xirodur® A500 ball bearings

Plastics are not necessarily incompatible with hot temperatures, as the Koppe example, below, shows. The pellet stove's operation is simple and ingenious. A mechanical drive unit moves the pellets without electrical energy through a cylinder resting on a roller into the combustion chamber for a burning time of around 24 hours. For the production process, Koppe was therefore looking for bearings for the drive mechanism that would work in adverse conditions without malfunctioning. The solution the company found was xiros polymer ball bearings made of temperature-resistant xirodur A500. This special material even allows brief high-temperature applications of up to 599°F, and because it needs no external lubrication, it runs smoothly over long periods. Metal ball bearings were out of the question. They seized immediately and generated an immense noise load.