To assist you in choosing the right bearing type, Z&W offers the following guide.

Bearing radial load

The main bearing bearing radial load is the radial bearing. The nominal contact Angle of this type of bearing is α0≤45°. Roller bearings of the same size can bear more radial loads than ball bearings.

Type N and NU cylindrical roller bearings can only bear radial loads, and other types of radial bearings can bear both radial loads and axial loads.

Axial load of bearings

Bearings that mainly bear axial loads are generally thrust bearings, and their nominal contact Angle is α0 > 45°. Thrust bearings and thrust angular contact ball bearings can withstand axial forces in one or two directions at the same time depending on the structure. When the axial force is particularly high, the thrust cylindrical roller bearing and thrust aligning roller bearing are preferred.

Thrust aligning roller bearings and unidirectional thrust angular contact ball bearings can bear axial load and radial load at the same time, and other thrust bearings can only bear axial load.

The length compensation of the bearing itself

Supporting a shaft and bearing usually adopts a combination of fixed bearings and floating bearings. The travelling bearing compensates for the length error and thermal expansion of the shaft.

Type NU and type N cylindrical roller bearings are ideal for travelling bearings, which themselves compensate for length. The inner and outer rings of the bearing can be fitted tightly.

Length compensation for sliding fit

Non-separable bearings (such as deep groove ball bearings and self-aligning roller bearings) can also be used as travelling bearings. One of the two rings of this type of bearing is fitted and has no axial fixed surface. Therefore, one of the rings of the bearing can move on its supporting surface.

Separable bearing (accuracy)

This is a bearing whose rings can be mounted separately, and its advantages are outstanding when both rings are fitted tightly.

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

Here is also an introduction to the type of non-separable bearings: non-separable bearings are: deep groove ball bearings, single row angular contact ball bearings, self-aligning ball bearings, cylindrical roller bearings and self-aligning roller bearings.

precision

In most cases, rolling bearings of general size and rotation accuracy are sufficient. When the requirements are higher, the bearings require a higher precision class (e.g., machine spindle bearings).

Non-neutral compensation

Non-neutrality occurs when machining the journal fitting surface or the bearing seat fitting surface, especially when the fitting surface is not processed in a single clamping. Misalignment can also occur when using bearing housings (e.g., flange housings or vertical housings). Due to the bending deformation of the shaft caused by the working load, the inner and outer rings of the bearing are inclined, and the misalignment will also occur.

Hunan Z&W bearing selection guide