Abstract: Two kinds of self-lubricating fabric liner made of polytetrafluoroethylene (PTFE)/Kevlar fiber were prepared by using different weave processes. The tribological properties of self-lubricating spherical plain bearing with two kinds of liners are studied under certain conditions， and the worn surface morpho-logies of the liners and the counterfaces are investigated under a scanning electron microscope (SEM) and an energy dispersive spectrometer (EDS). The results show that spherical plain bearings with the liner A (two kinds of fibers were mixed into the yarn firstly， and they were woven into fabric together with Kevlar fibers) present poor tribological properties under the condition of high frequency and heavy load. The serious fatigue wear and adhesive wear occurred on the worn surfaces of the liner A. However，the spherical plain bearings with the liner B（PTFE and Kevlar fibers were woven into fabric， and the friction surface was rich in PTFE fibers and the bonding surface was rich in Kevlar fibers）present better tribological properties compared with the liner A. And the wear resistance of the self-lubricating spherical plain bearings is significantly improved. Slight adhesive wear and abrasive wear occurred on the worn surfaces of the liner B. So the weave process for the liner has a great influence on the tribological properties of spherical plain bearings. Key

Key words: mechanics, sphericalplainbearing, fabricliner, weaveprocess, frictionandwear