Thrust spherical roller bearings and spherical roller bearing,the same seat ring raceway surface is consistent with the bearing center shaft point as the center of the sphere,the roller of these bearings are of spherical shape,therefore,has the automatic regulating cardiac function,are not sensitive to coaxial degree and axis deflection.Compared with cylindrical roller thrust bearing,large carring capacity,relative sliding is small,but limit rotatinaol speed is low.