This outer ring of roller bearings, spherical surface design into the surface, the centre together with the Centre bearing. Improved design to provide better Raceway and roller contacts between the lines. Such structures can provide greater radial load. In addition to good performance radial, the bearings can also withstand greater two-way axial loading. Spherical roller bearings can also adapt to a certain point of error, you can deal with the occurrence of a series of unexpected situations.
