Self lubricating spherical plain bearings are applied in circumstances which axle and bearing house need self-aligning and maybe have some slant and swing. This kind of bearing has a series of advantanges, no matter from technology or economy, it can meet customers' demands preferabley, so it is used widespread. Compared with other type of slide bearings, this type of bearings have the following advantages: Bear the radial and axial force simultaneously, possess the best combination of the sliding contact surfaces, non-sensitive to slant, amortizing vibration.