Several factors of bearing type selection


1, bearing radial load

Bearings that are primarily subjected to radial loads are radial bearings. The nominal contact angle of such bearings is a0 <= 45 0. Roller bearings with the same amount of rain have a greater radial load than ball bearings.

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

2, the axial load of the bearing

The bearing that mainly bears the axial load is generally a thrust bearing, and its nominal contact angle is a0>450. Thrust bearings and thrust angular contact ball bearings can withstand axial forces in one or two directions depending on the structure. A thrust cylindrical roller bearing and a thrust spherical roller bearing are preferably used when the bearing force is particularly high.

Thrust spherical roller bearings and one-way thrust angular contact ball bearings can withstand both axial and radial loads. Other thrust bearings can only withstand axial loads.

3, the length compensation of the bearing itself

Supporting a shaft and bearing usually adopts a structure in which a fixed bearing and a running bearing are combined. The running bearing compensates for the length error and thermal expansion of the shaft.

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