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

Self-aligning ball bearing

The self-aligning ball bearing is a double-row ball bearing in which the outer ring raceway is processed into a spherical shape and the inner ring has two deep groove raceways, and has a self-aligning performance. It is mainly used to bear the radial load. While receiving the radial load, it can also bear a small amount of axial load, but generally can not withstand the pure axial load, and its limit speed is lower than that of the deep groove ball bearing. This kind of bearing is mostly used on the double support shaft which is easy to bend under the load, and the part with the double bearing hole can not guarantee the strict coaxiality, but the relative inclination of the center line of the inner ring and the center line of the outer ring must not exceed 3 degree.

Self-aligning ball bearing basic type

The inner bore of the 12, 13, 22 and 23 series of self-aligning ball bearings may be cylindrical or conical. Self-aligning ball bearings with a bearing bore of 1:12 (code suffix K) can be mounted directly onto a conical shaft or mounted to a cylindrical shaft via an adapter sleeve. FAG provides a seal-free alignment. In addition to the ball bearings, a basic type of self-aligning ball bearing with a sealing cover at both ends (code suffix 2RS) is also available.

Self-aligning ball bearing bearing clearance

The basic type of cylindrical bore is the normal set of self-aligning ball bearings, and the radial clearance is larger than that of the normal set (code suffix C3). The basic type of tapered bore has a radial clearance of the C3 group which is larger than the normal group.

Sealed self-aligning ball bearing

Sealed self-aligning ball bearings (code suffix .2RS) are sealed at both ends (contact seal). To ensure longevity, they have added grease to the manufacturing plant. Sealed bearings have a minimum operating temperature limit of -30 °C.

Self-aligning ball bearing alignment

Self-aligning ball bearings allow the shaft to be deflected by 4° around the center of the bearing, and the sealed self-aligning ball bearing can compensate for up to 1.5°.

1. Adapt to the alignment error

Self-aligning ball bearings are better suited to alignment errors than any other bearing. That is to say, the bearing can still run smoothly under the condition of shaking.

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. Minimum maintenance requirements

With a small amount of lubricant, the self-aligning ball bearings can be operated efficiently. Its low friction and excellent design extend the time interval for relubrication. Sealed bearings do not require relubrication.

4. Low noise and vibration levels

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

Characteristics and uses of self-aligning ball bearings

The self-aligning ball bearing has two structures of a cylindrical hole and a tapered hole, and the material of the cage is steel plate, synthetic resin and the like. The characteristic is that the outer ring raceway has a spherical shape and has self-aligning property, which can compensate for errors caused by different degrees of heart and shaft deflection, but the relative inclination of the inner and outer rings must not exceed 3 degrees.

Self-aligning ball bearing structure:

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

The main purpose 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.