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The difference between spherical ball bearings and spherical roller bearings

wallpapers News 2021-07-27
Self-aligning ball bearings and self-aligning roller bearings have been applied. Their names are similar but there are still differences, both in appearance and application. What is the difference between a self-aligning ball bearing and a spherical roller bearing?
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 papermaking machinery, reduction gears, railway vehicle axles, rolling mill gearbox seats, crushers, various industrial reducers, etc.
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. The middle bearing mainly bears the radial load. While bearing radial load, it can also bear a small amount of axial load. It is usually not used for bearing 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.
Reasons for choosing 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. It can bear a relatively large radial load and certain axial load.
The application difference between spherical roller bearings and spherical ball bearings
1. Low-speed, heavy-duty working conditions, suitable for spherical roller bearings
2. High-speed, light-load working conditions, suitable for self-aligning ball bearings

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