What are the types of angular contact ball bearings

Angular contact ball bearings are: 7000C type (∝=15°), 7000AC type (∝=25°) and 7000B (∝=40°) several types. The lock of this kind of bearing is on the outer ring, generally the inner and outer rings cannot be separated, and can bear the combined radial and axial loads and the axial load in one direction. The ability to bear axial load is determined by the contact angle. The larger the contact angle, the higher the ability to bear axial load. This type of bearing can limit the axial displacement of the shaft or housing in one direction. The contact ball bearing has a high limit speed, and can bear radial load and axial load at the same time, and can also bear pure axial load. Its axial load capacity is determined by the contact angle and increases with the increase of the contact angle. Single row angular contact ball bearings Single row angular contact ball bearings can only bear axial load in one direction. When bearing radial load, additional axial force will be caused, and corresponding reverse load must be applied. Therefore, this kind of bearing is generally Use in pairs.

Double row angular contact ball bearings can withstand larger radial and axial bidirectional combined loads and moment loads, which are mainly radial loads. It can limit the bidirectional axial displacement of the shaft or housing, and the contact angle is 30 degrees. Bearing code: 7 Paired installation angular contact ball bearings Paired installation angular contact ball bearings can withstand radial and axial bidirectional combined loads mainly based on radial loads, and can also withstand pure radial loads. The tandem configuration can only withstand axial loads in a single direction, while the other two configurations can withstand axial loads in either direction.

This type of bearing is generally selected and combined by the manufacturer and submitted to the user. After installation, there is preload interference, and the ring and steel ball are in an axial preload state, thus improving the rigidity and rotation of the entire set of bearings as a single support. precision. Back-to-back configuration, the rear code is DB (eg 70000/DB), the load lines of the bearings paired back-to-back are separated to the bearing shaft. Axial loads acting in both directions can be supported, but loads in each direction can only be supported by one bearing. Back-to-back mounted bearings provide a relatively rigid bearing arrangement and can withstand overturning moments. In the face-to-face configuration, the rear code is DF (such as 70000/DF), and the load lines of the face-to-face paired bearings converge to the bearing shaft.

Axial loads acting in both directions can be supported, but loads in each direction can only be supported by one bearing. This configuration is not as rigid as a back-to-back pair, and it is less suited to withstand overturning moments. The rigidity of this configuration and the ability to bear the overturning moment are not as good as those of the DB configuration, and the bearing can bear bidirectional axial loads; in the series configuration, the rear code is DT (such as 70000/DT), in the series configuration, the load line is parallel, and the radial and The axial load is evenly shared by the bearings. However, bearing sets can only withstand axial loads acting in one direction.

If the axial load is acting in the opposite direction, or if there is a compound load, a third bearing that is adjusted relative to the tandem paired bearing must be added. This configuration also allows three or more bearings to be connected in series at the same support, but can only bear axial loads in one direction. Usually, in order to balance and limit the axial displacement of the shaft, a bearing that can bear the axial load in the other direction needs to be installed at the other support. Bearing code: 0 Load capacity (simplified) The following content is only for the load capacity of the matched bearing, and the basic load rating and fatigue limit load given in the product table are only applicable to a single bearing. *Basic dynamic load rating for standard bearings in any arrangement and SKF Explorer bearings C=1, 62xC single bearing in back-to-back or face-to-face arrangement *Basic dynamic load rating for SKF Explorer bearings C=2xC single bearing in tandem arrangement *Basic static load rating Co=2xCo single bearing *Fatigue limit load Pu=2xPu single bearing structural deformation type The characteristic of double row angular contact ball bearing is that it can bear the combined load of radial and axial loads at the same time, limiting the two aspects of the shaft Axial displacement.

Compared with the two-way thrust ball bearing, this bearing has a higher limit speed, a contact angle of 32 degrees, good rigidity, and can withstand a large overturning moment. It is widely used in the front wheel hub of cars (some models also use the same size. Double row tapered roller bearings).