The outer spherical ball bearing is actually a variant of the deep groove spherical ball bearing, which is characterized by a spherical surface of outer diameter on the outer ring, which can be mounted on the corresponding concave spherical surface of the bearing for centering. External spherical bearing is mainly used to withstand a combination of radial and axial loads, mainly radial loads, generally not suitable for single axial load.

Although its main characteristics should be similar to deep groove ball bearings, but since such bearings are mainly used in relatively rough machinery, the installation and positioning are not accurate enough, the axis between the axis and the seat hole is poorly aligned, or the shaft length and large bend, the accuracy of the bearing itself is not high enough, and some designs are relatively rough, the actual performance of the support with deep grooves of the same specification is greatly reduced. For example, outer spherical ball bearings with an upper thread are applied to axles with a greater difference in stiffness and flexure. Bearings of this type have sealing rings on both sides that tightly prevent dirt from falling and are already filled at the factory

No need to clean or replenish the appropriate amount of lubricants before installation. When tightening the upper screw on the projection of the inner ring of the bearing on the axis, the permissible axial load shall not exceed 20% of the nominal mobile load.