Arbitrary paired bearings are specially manufactured, so that when arranged and installed closely together, a certain internal clearance or preload and/or uniform load distribution can be obtained without the use of gaskets or similar devices. Any paired bearing has a model suffix that represents internal clearance (CA, CB, CC) or preload (GA, GB, GC).

When ordering, it is necessary to specify the quantity of individual bearings required, rather than the quantity of bearing groups.

When the load capacity of a single row bearing is insufficient, use paired installation (in series configuration); When the load is a composite load or an axial load acting in two directions, use paired installation (back to back and face to face pairing).

When configured in series, the load lines are parallel, and the radial and axial loads are evenly shared by the bearings. However, the bearing group can only withstand axial loads acting in one direction. If the axial load is applied in the opposite direction, or if there is a composite load, a third bearing with relative series paired bearing adjustment must be added.

The load lines of bearings paired back to back are separated towards the bearing shaft. It can withstand axial loads acting in two directions, but the load in each direction can only be borne by one bearing. Back-to-back mounted bearings provide a relatively rigid bearing configuration and can withstand overturning torque.

The load lines of face-to-face paired bearings converge towards the bearing shaft. It can withstand axial loads acting 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 pairing and is not very suitable for withstanding overturning torque.

When used in combination with a single bearing, bearings with a universal configuration also have advantages. Most bearings are SKF Explorer series, therefore they have higher accuracy, carrying capacity, and rotational speed.

What is angular contact bearing? Introduction to the Function of Angular Contact Bearings

Angular contact bearings mainly bear large unidirectional axial loads, and the larger the contact angle, the greater the load-bearing capacity. The cage material includes steel plate, brass, or engineering plastic, and the forming method of angular contact bearings includes stamping or turning, depending on the bearing form or usage conditions. Other types of bearings include combination angular contact ball bearings, double row angular contact ball bearings, and four point contact ball bearings.

Angular contact bearings can withstand both radial and axial loads simultaneously. Capable of operating at higher speeds. The larger the contact angle, the higher the axial bearing capacity. High precision and high-speed bearings typically have a contact angle of 15 degrees. Under the action of axial force, the contact angle will increase. Single row angular contact bearings can only withstand axial loads in one direction, which will cause additional axial forces when subjected to radial loads. And can only limit the axial displacement of the shaft or shell in one direction. If installed in pairs, make the outer rings of a pair of bearings face each other, that is, the wide end faces the wide end face and the narrow end faces the narrow end face. This can avoid causing additional axial forces and limit the shaft or casing to within the axial clearance range in both directions.

Angular contact bearings can withstand both radial and axial loads - combined loads - due to the relative displacement of their inner and outer raceways along the horizontal axis (single row angular contact ball bearings can only withstand unidirectional axial loads, so they are usually installed in pairs). The materials of the cage include brass, synthetic resin, etc., which are distinguished based on the bearing form and usage conditions.