... backed Oilless Bearing WZB-1 isa kind of thin wall wrapped bearings made of tripple layer compositesmaterial which consists of a steel backing, ... used withoutoil, or only a trace of oil is needed. Moreover, it is of low cost, lowvibration and low voice, ... the mating surface from scorring.WZB-1 iswidely applied in various sliding articles of different kind of machines, suchas printting machines, textile ...