Self-aligning ball bearings are double row bearings with a spherical outer ring raceway. The inner ring, balls, and cage can rotate freely around the center of the bearing, which is self-aligning. Its self-aligning ability can compensate for misalignment, shaft deformation and housing deformation. Self-aligning ball bearings are suitable for transmission bearings where the shaft and upper shell are difficult to center and the shaft is prone to deflection.

self-aligning ball bearing

The self-aligning ball bearing is a double-row ball bearing with the raceway of the outer ring processed into a spherical shape, and the inner ring has two deep groove raceways. It has self-aligning performance. It is mainly used to bear radial load. While bearing radial load, it can also bear a small amount of axial load, but generally cannot bear pure axial load, and its limiting speed is lower than that of deep groove ball bearings. This type of bearing is mostly used on double-supported shafts that are prone to bending under load, and in parts where the double seat holes cannot guarantee strict coaxiality, but the relative inclination between the centerline of the inner ring and the centerline of the outer ring must not exceed 3 Spend.

Basic types of self-aligning ball bearings

Self-aligning ball bearings in series 12, 13, 22 and 23 can have cylindrical or conical bores. Self-aligning ball bearings with an inner hole taper of 1:12 (code suffix K) can be mounted directly on a conical shaft or on a cylindrical shaft through an adapter sleeve. FAG can provide self-aligning ball bearings without seals In addition to ball bearings, the basic type of self-aligning ball bearings with sealing covers at both ends can also be provided (code name suffix 2RS).

Self-aligning ball bearing bearing clearance

The basic type of self-aligning ball bearings with cylindrical bores is manufactured with a common clearance group, and bearings with a radial clearance larger than the normal clearance (code suffix C3) are available upon request. The radial clearance of the basic type self-aligning ball bearing with tapered hole is C3 group which is larger than the ordinary group.

Sealed self-aligning ball bearings

Sealed self-aligning ball bearings (code suffix .2RS) have seal covers (contact seals) at both ends. To ensure longevity, they have been greased at the factory. The minimum operating temperature of sealed bearings is limited to -30°C.

Alignment of self-aligning ball bearings

The self-aligning ball bearing allows the shaft to deflect 4° around the center of the bearing, and the sealed self-aligning ball bearing can compensate up to 1.5°.

1. Adapt to alignment errors

Self-aligning ball bearings accommodate misalignment conditions better than any other bearing. Even in the case of shaking, the bearing can still run smoothly.

2. Excellent high-speed performance

F&F self-aligning ball bearings have the lowest starting and running friction of all roller bearings. In other words, the bearing has excellent high-speed performance.

3. Minimal maintenance requirements

Only a small amount of lubricant is required for efficient operation of self-aligning ball bearings. Its low friction and superior design extend relubrication intervals. Sealed bearings require no relubrication.

4. Low noise and vibration levels

A large number of comparative tests have shown that: the self-aligning ball bearings have precise and smooth raceways, making them have the lowest vibration and noise levels.

Characteristics and uses of self-aligning ball bearings

Self-aligning ball bearings have two structures: cylindrical hole and tapered hole, and the cage is made of steel plate, synthetic resin, etc. Its characteristic is that the raceway of the outer ring is spherical and has self-aligning properties, which can compensate errors caused by different concentricity and shaft deflection, but the relative inclination of the inner and outer rings must not exceed 3 degrees. the

Structural form of self-aligning ball bearing:

The deep groove ball bearing with dust cover and sealing ring has been filled with proper amount of grease during assembly. It should not be heated or cleaned before installation. It does not need to be re-lubricated during use. It is suitable for operating temperatures between -30°C and +120°C. between.

Main application of self-aligning ball bearings: suitable for precision instruments, low-noise motors, automobiles, motorcycles and general machinery, etc. It is the most widely used type of bearing in the machinery industry