Spherical roller bearings have two roller is mainly exposed to the diameter of a load, but also can withstand the axial load any direction. High radial load capacity, especially suitable for the work overload or vibration loads, but can not afford pure axial load. Kind of bearing outer ring raceway is spherical, so the good performance of aligning, can compensate concentricity error. Spherical roller bearings have two rows of symmetrical spherical roller, a common spherical outer raceway, inner ring raceway two bearing axis is tilted at an angle, aligning performance, when the axis of the force bearings can still be used normally when curved or install a different mind-mind with the bearing dimension series generally permissible aligning angle is 1 to 2.5 degrees, the load bearing capacity of the type, in addition to radial loads the outer bearing can withstand two-way axial load, with good impact resistance, in general, self-aligning roller bearings that allow the work of low speed. Neutral industrial packaging