Spherical Roller BearingsSpherical roller bearings have two rows of rollers, mainly take radial load, can also take axial load in any one direction. This kind of bearings have high radial load capacity, especially apply to the environments of heavy load or vibrate load, but they can't take axial load only. These bearings' outer raceway is spherical surface which contribute to aligning function, insensitive to misalignment of the shaft relative to the housing.
Self-aligning Ball BearingsThe outer ring of self-aligning ball bearings' raceway consist of two balls units composed by spheres, inner ring, balls and cage. The curvature center and bearing center line are the same. So the inner ring, ball and the cage can rotate around the bearing center. These bearings can be made into both opened and sealed. Self-aligning ball bearings have two structures: cylindrical bore and taper bore.