SF-1X is wall wrapped bearings 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 for lubricant.It is of low friction coefficient ,anti-wear ,anti-corrosion and can be used without oil.or only a trace of oil needed,Moreover,it is of low cost ,low vibration,and low noise,compact and light.SF-1X is widely applied in various sliding articles of different kind of machines such as textile machine,tobacco machines,hydraulic vechicles,automobiles,agriculture and forests machines and so on.