SF-1 is wall wrapped bearing made of triple layer composites material which consists of a steel backing, a sintered porous bronze particles interlayer and calendared with PTFE and Pb mixture as surface layer, It is of low friction cofeeicient, anti-wear, anti-corrosion and can be used without oil, or only a trace of oil os needed. Moreover, it is of low cost, low vibration and low noise, compact and light, sf-1Xis widely applied in various sliding articles of different kind of machinery, Such as textile machinery, tobacoo machinery, hydraulic vechicles, antomobiles, agriculture and forests machinese and soon.