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Pair mounted angular contact ball bearings

- Jul 27, 2018 -

Pair mounted angular contact ball bearings

The pair of angular contact ball bearings can withstand radial and axial two-way load combined with radial load, and can also bear pure radial load. The series configuration can only bear the axial load in a single direction, while the other two configurations can bear axial load in any direction. This type of bearing is usually submitted by the manufacturer to the user. After installation, the bearing is preloaded, the ring and the steel ball are in the axial preloading state, thus improving the whole bearing as the single support stiffness and rotation accuracy.

Back to back configuration, the postcode is DB (such as 70000/DB), and the load lines of the back-to-back pairs of bearings are separated from the bearing shaft. It can withstand axial loads in two directions, but the load in each direction can only be borne by one bearing. Back-to-back bearings provide relatively rigid bearing configurations and withstand overturning moments.

In face to face configuration, the postcode is DF (e.g. 70000/DF). The load lines of the bearing face to face meet the bearing shaft. It can withstand axial loads in two directions, but the load in each direction can only be borne by one bearing. This configuration is not as rigid as back-to-back matching, and is not very suitable for overturning moments. The rigidity of the configuration and the ability to withstand overturning moments are not as good as the DB configuration.

In series configuration, the postcode is DT (such as 70000/DT). When the series is configured, the load lines are parallel, and the radial and axial loads are evenly shared by the bearings. However, the bearing group can only bear the axial load acting on one direction. If the axial load is in the opposite direction, or if there is a composite load, it is necessary to add a third pair of bearings that are relatively matched in series with the bearing. This configuration can also connect three or more bearings at the same support, but it can only bear uniaxial axial loads. Usually, in order to balance and restrict the axial displacement of the shaft, another bearing is equipped with bearings that can bear another axial load.

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