What is the difference between a self-aligning ball bearing and a spherical roller bearing? Which one should I choose?

Self-aligning ball bearing

The self-aligning ball bearing has two rows of steel balls, the inner ring has two raceways, and the outer ring raceway is an inner spherical surface, which has the performance of self-aligning. It can automatically compensate for the coaxiality error caused by the bending of the shaft and the deformation of the housing, and it is suitable for parts where strict coaxiality cannot be guaranteed in the support seat hole. This kind of bearing mainly bears a radial load. While bearing radial load, it can also bear a small amount of axial load. It is usually not used to bear pure axial load. For example, bearing pure axial load, only one row of steel balls is stressed. It is mainly used in agricultural machinery such as combine harvesters, blowers, paper machines, textile machinery, woodworking machinery, traveling wheels, and drive shafts of bridge cranes.

Spherical roller bearing

Spherical roller bearings have two rows of rollers, which are mainly used to bear radial loads and can also bear axial loads in any direction. This kind of bearing has high radial load capacity, especially suitable for working under heavy load or vibration load, but cannot bear pure axial load; it has good centering performance and can compensate for the same bearing error. Main uses paper-making machinery, reduction gears, railway vehicle axles, rolling mill gearbox seats, crushers, various industrial reducers, etc.

The application difference between spherical roller bearings and spherical ball bearings

1. High-speed, light-load working conditions, suitable for self-aligning ball bearings.

2. Low-speed, heavy-duty working conditions, suitable for spherical roller bearings.

Why use self-aligning bearings

1. It is used in the bearing seat, where it does not have high requirements on the axis of the shaft.

2. the shaft is easy to be loaded and deformed

3.thermal deformation at high temperature

4. The wheel on the axle has an uneven datum plane.

5.can bear relatively large radial load, can bear certain axial load.