Spherical roller bearings have two rows of rollers, mainly bear radial load, but also can
withstand the axial load in either direction. Have high radial load capacity, especially
suitable for heavy load or vibration load work, but can not bear pure axial load. This kind of
bearing outer ring raceway is spherical, so its alignment performance is good, can
compensate for coaxiality error. (When the shaft is bent by the force or installation of
different heart bearing can still be used normally)