Spherical roller bearings are composed of a spherical raceway outer ring and a double raceway inner ring, one or two cages and spherical rollers. Since the center of the outer ring spherical raceway is consistent with the bearing center, it has self-aligning performance and can automatically adjust the tilt or shaft deflection caused by the angular error between the shaft and the bearing seat.

Spherical roller bearings can withstand large radial loads and bidirectional axial loads. Especially suitable for bearing heavy loads or shock and vibration loads. However, the allowable working speed of spherical roller bearings is relatively low.

 Under normal working conditions, the allowable angular deviation of spherical roller bearings is 1°～2.5°, and the self-aligning performance will be reduced if the sealing device is equipped.

 For the values of the allowable angular deviations of different size series of spherical roller bearings, please refer to the relevant content of "Bearing Type Selection" in the overview part of this catalog.

Type C

The C-type bearing has no ribs on both sides of the inner ring, there are two cages, and there is a movable middle retaining ring between the two rows of spherical rollers. When the bearing is running, the middle retaining ring can move axially to play a compensation role. When the bearing is bearing the axial load, the load of the two rows of rollers can be adjusted to make it evenly load and avoid stress concentration.

CA type

CA type bearing has ribs on both sides of the inner ring, a cage, and there is (or no) a movable middle retaining ring between the two rows of spherical rollers. When the bearing is running, the middle retaining ring can move axially to compensate When the bearing is under axial load, the load of the two rows of rollers can be adjusted to make it evenly load and avoid stress concentration. If there is no movable sidewall, its function is assumed by the cage.

MB type

Spherical roller bearings with fixed ribs have ribs on both sides of the inner ring, and a fixed middle rib in the middle,

There are two cages. Although the rollers and the C and CA type bearing rollers are spherical rollers, the length in the axial direction of the rollers is asymmetrical. When the bearing is running, although the middle retaining ring cannot move axially, it guides the rollers well. When the bearing is under axial load, the load of the two rows of rollers cannot be adjusted, and it is easy for the single row of rollers to be stressed or have stress concentration.

Although this structure has a tendency to be replaced by C and CA type bearings, it still has certain advantages in certain applications, such as occasions where the axial load is not large and the vibration load is large.