This kind of bearing is widely used in  scroll compressors of automobile air- conditioners and  turbochargers of automobiles. The dimension of expansion compensation bearings is almoust as big as that of deep groove ball bearings.   Due to  a circular tank on the surface of outside diameter ,  inlaid with the polymer materials of expansion coefficient, this kind of bearing can resist high temperature. The utility model of it is compact, small, lightweight and  easy to install. At the same time it  also has better temperature resistance and longer service life.