Main use of outer spherical bearings


There are two common types of outer spherical bearings: […]

There are two common types of outer spherical bearings: 1. outer spherical UC bearing with set screw; 2. outer spherical UK bearing with tapered bore;
The outer spherical bearing is a bearing unit that combines a rolling bearing with a bearing housing. Most of the outer spherical bearing are made of spherical surface and are mounted together with the bearing housing with spherical inner hole. The structure is various, and the versatility and interchangeability are good. At the same time, these bearings are also designed with a certain degree of self-alignment, easy to install, and have a double-structured sealing device that can work in harsh environments. The bearing housing is typically cast. Commonly used seats are vertical seat (P), square seat (F), boss square seat (FS), boss circular seat (FC), diamond seat (FL), ring seat (C), slider seat, etc. T).

The outer spherical ball bearing is actually a variant of the deep groove ball bearing. Its characteristic is that its outer ring outer diameter surface is spherical, which can be fitted into the corresponding concave spherical surface of the bearing seat to play the role of centering. Although its basic performance should be similar to that of deep groove ball bearings, most of these bearings are used in relatively rough machines, the mounting position is not accurate enough, the axis of the shaft and the seat hole is poorly centered, or the shaft length is deflected. In the case of a large class, and the accuracy of the bearing itself is not high enough, and some structures are also rough, so the actual performance of the common performance is comparable to the deep groove ball bearing of the same specification. For example, the outer spherical ball bearing with top wire is applied to the through shaft with large difference in deflection. The bearing has sealing ring on both sides, which can strictly prevent the intrusion of dirt. The factory is loaded with a proper amount of lubricant, and it does not need to be cleaned before installation. No additional lubricant is required, and the axial load on the protruding end of the inner ring of the bearing is tightened on the shaft. The allowable axial load shall not exceed 20% of the rated dynamic load.
Outer spherical bearings are preferred for applications where equipment and components are required to be simple, such as for agricultural machinery, transportation systems or construction machinery. It is mainly used to bear radial and axial combined loads mainly based on radial load. Generally, it is not suitable to bear axial load alone. Such bearings can be installed with inner ring (with full set of rollers and retainers) and outer ring. This type of bearing does not allow the shaft to be tilted relative to the housing, creating additional axial forces under radial load. The axial clearance of the bearing has a great relationship with the normal operation of the bearing. When the axial clearance is too small, the temperature rise is high; when the axial clearance is large, the bearing is easily damaged.