To assist you in selecting the appropriate bearing type, the following guidelines are provided.

1. Radial load of bearings

The bearings that mainly bear radial loads are radial bearings. The nominal contact angle a0 of this type of bearing is less than or equal to 45 °. Roller bearings with the same size can withstand greater radial loads than ball bearings.

N-type and NU type cylindrical roller bearings can only withstand radial loads, while other types of radial bearings can withstand both radial and axial loads.

2. Axial load of bearings

The bearings that mainly bear axial loads are generally thrust bearings, with a nominal contact angle a0>45 °. Thrust bearings and thrust angular contact ball bearings can simultaneously withstand axial forces in one or two directions depending on their structure. When subjected to particularly high axial forces, it is preferable to use thrust cylindrical roller bearings and thrust self-aligning roller bearings.

Thrust self-aligning roller bearings and unidirectional thrust angular contact ball bearings can simultaneously withstand axial and radial loads, while other thrust bearings can only withstand axial loads.

3. Compensation for the length of the bearing itself

The structure of supporting a shaft and bearing usually adopts a combination of fixed bearings and floating bearings. The length error and thermal expansion of the compensating shaft of the moving bearing.

NU and N-type cylindrical roller bearings are ideal moving bearings that can compensate for length on their own. The inner and outer rings of the bearing can be tightly fitted.

Length compensation for sliding fit

Non separable bearings (such as deep groove ball bearings and self-aligning roller bearings) can also be used as traveling bearings. One of the two rings of this type of bearing is matched and does not have an axial fixing surface. Therefore, a ring of the bearing can move on its bearing surface.

4. Separable bearings (accuracy)

This is a type of bearing where the rings can be installed separately, and its advantages are particularly prominent when both rings are tightly fitted.

Separable bearings include four point contact ball bearings, double half inner ring double row angular contact ball bearings, cylindrical roller bearings, tapered roller bearings, thrust ball bearings, thrust cylindrical roller bearings, and thrust self-aligning roller bearings.

Let me also introduce a type of non separable bearing here: Non separable bearings include deep groove ball bearings, single row angular contact ball bearings, self-aligning ball bearings, Peng shaped roller bearings, and self-aligning roller bearings.

accuracy

In most cases, using rolling bearings of general size and rotational accuracy is sufficient. When higher requirements are needed, bearings require higher precision levels, such as machine tool spindle bearings.

5. Non neutral compensation

Non neutrality occurs when machining the mating surface of the shaft neck or bearing seat, especially when the machining of the mating surface is not completed in one assembly. Misalignment can also occur when using a bearing seat, such as a flanged bearing seat or a vertical bearing seat. When the work load causes the shaft to bend and deform, resulting in the inclination of the inner and outer rings of the bearing, misalignment can also occur.