DU Oilless Bush, PAF Bushing, PAP Bushing ,INA PAP Bushing, SF-1X bushing 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 coefficient,anti-wear,anti-corrosion and can be used without oil,or only a trace of oil is 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 machines,Such as textile machines,tobacoo machines,hydraulic vechicles,antomobiles,agriculture and forests machinese and so on.