The reason key rotating elements in PEC self-lubrication escalator rotary chains employ self-lubricating plastic plain bearings, and do not use conventional rolling bearings, is as follows: While escalator rotary chains ordinarily employ rolling bearings, friction from the handrail belts and guide rails produces large amounts of dust and particles. This dust and particles can severely affect rolling bearings' normal operation and service life, and rolling bearings used outdoors can fail due to rusting. In addition, after operating for a certain length of time, rolling bearings tend to make increasing amounts of noise, and may even jam. Handrail belts wear and may fail, and the increasing load on escalators' drive systems can shorten the life of their electrical machinery.The rolling bearings supporting escalator rotary chains may start producing abnormal noise after six months of operation, and may suffer jams;；
he use of EPB15 plastic plain bearings made from self-lubricating material on PEC self-lubricating plastic escalator rotary chains can eliminate the need for regular bearing oiling, and the EPB15 material is highly dust resistant. The use of self-lubricating bearings employing this material can ensure long-term normal operation under harsh conditions. Apart from achieving the long-term smooth, low-noise operation of PEC rotary chains, the use of plastic plain bearings can resolve the rolling bearings' problems of noise and a tendency to jam. In addition, application of a special surface treatment to the metal components of PEC rotary chains can ensure long-term smooth outdoor operation.。
The secret to long-lasting PEC self-lubricating escalator rotary chains lies in the use of revolutionary self-lubricating plastic plain bearings, and there are many successful cases of applications in the elevator industry. More and more design engineers are using plastic plain bearings in maintenance-free drive chains and maintenance-free lubricating areas and tractors.