Composite dry sliding bearing is an industrial bearing that does not require external lubrication. It belongs to the sliding friction type bearing and is mainly used in mechanical motion scenarios where maintenance is not required or lubricants are insufficient. It complies with ISO 3547-1976 and DIN 1494 standards. It achieves low friction operation through solid lubricating materials and is divided into two standard designs: B/E type and M type There are two standard designs for composite shaft sleeves, with the difference being the composition of the sliding layer: composite B/E shaft sleeves and composite M shaft sleeves. B material has a layer of copper plated steel plate backing (bearing wall thickness within 2 millimeters (inclusive)), on which a porous layer of tin bronze with a thickness of 0.2 to 0.4 millimeters is sintered. Bearings with thicker bearing walls do not have copper plated backing. By pressing process, PTFE (polytetrafluoroethylene) is mixed with other additives that can reduce friction Fill the mixture into the fine pores on the sintered layer. This layer of sintered copper is covered with a running in layer that is 5 to 30 millimeters thick and made of the same mixture. The bearing made of B/E material achieves the optimal combination of mechanical properties of sintered copper and excellent sliding and lubrication properties of PTFE mixture. This combination ensures good dimensional stability and conductivity
