The outer spherical ball bearing is actually a variant of the deep groove ball bearing, which is characterized in that the outer diameter surface of its outer ring is spherical and can be fitted into the corresponding concave spherical surface of the bearing seat to play a self-aligning role.

Although its basic performance should be similar to that of deep groove ball bearings, but because these bearings are mostly used in relatively rough machinery, the installation and positioning are not accurate enough, the axis of the shaft and the seat hole is poorly aligned, or the shaft is long and deflected. In the case of large grades, and the accuracy of the bearing itself is not high enough, and some structures are relatively rough, the actual performance of the common performance is relatively discounted for deep groove ball bearings of the same specification. For example, the outer spherical ball bearing with a top wire is used for a through shaft with poor rigidity and deflection. This type of bearing has sealing rings on both sides to prevent the invasion of dirt tightly. It is filled with an appropriate amount of lubricant at the factory and does not need to be cleaned before installation. No additional lubricant is needed, when the top screw on the protruding end of the bearing inner ring is tightened on the shaft. The allowable axial load must not exceed 20% of the rated dynamic load.

The performance of the outer spherical ball bearing with eccentric sleeve is basically the same as that of the outer spherical bearing with top wire, except that the top wire is not on the inner ring but on the eccentric sleeve. The inner hole of the outer spherical ball bearing with a tapered hole is a tapered hole with a 1:12 taper, which can be directly mounted on a tapered shaft, or mounted on an optical shaft without a shoulder by means of a fixed bushing, and the bearing clearance can be fine-tuned.