Features of FAG Angular Contact Ball Bearings

wallpapers Resource 2020-10-26
In modern industry, angular contact ball bearings are used in many machinery productions. They can operate at high speeds, have low friction and can withstand both radial and axial loads. One of the obvious characteristics of German FAG angular contact ball bearings is that the larger the contact angle, the higher the axial load-carrying capacity. Let's take a closer look at the characteristics of German FAG angular contact ball bearings.
 
1. Design features
 
Angular contact ball bearings 1. Angular contact ball bearings have raceways on the inner and outer rings, and the inner and outer rings can move relative to each other along the bearing axis. This type of bearing is particularly suitable for bearing compound loads, that is, loads that act simultaneously in the radial and axial directions. The shape of angular contact ball bearings is similar to that of deep groove ball bearings. There is only one rib on a ring and a slope on the other side. There are more steel balls in the cage and assembly.
 
2. The axial load bearing capacity of German FAG angular contact ball bearings increases with the increase of the contact angle. The contact is the angle between the line of contact points between the ball and the raceway in the radial plane and the vertical line of the bearing axis. There is a contact angle between the ferrule and the ball. The standard contact angles are 15°, 30° and 40°. The larger the contact angle, the greater the axial load capacity. The smaller the contact angle, the more conducive to high-speed rotation.
 
 
3. During operation, the angular contact ball bearing can eliminate the internal clearance of the angular contact ball bearing due to the axial load after installation, which also relatively improves the rotation accuracy of the angular contact ball bearing.
 
4. German FAG angular contact ball bearings can obtain greater rigidity through pre-priced loads and maintain the original accuracy characteristics for a long time.
 
2. Installation features
 
As I have introduced before, there are three types of angular contact ball bearing installation selection methods and forms: back-to-back, face-to-face and tandem arrangement.
 
1. When installed back to back (the wide end faces of the two bearings are opposite), the contact angle of the bearing spreads along the direction of the rotation axis, which can increase its radial and axial support angle rigidity and resistance to deformation;
 
2. When installed face-to-face (the narrow end faces of the two bearings are opposite), the contact angle of the bearing converges in the direction of the rotation axis, and the rigidity of the supporting angle is small. Since the inner ring of the bearing extends out of the outer ring, when the outer rings of the two bearings are pressed together, the original clearance of the outer ring is eliminated, which can increase the preload of the bearing;
 
3. When installed in series (the wide end faces of the two bearings are in one direction), the contact angles of the bearings are in the same direction and parallel, so that the two bearings can share the working load in the same direction. However, when using this type of installation, in order to ensure the axial stability of the installation, two pairs of bearings arranged in series must be installed oppositely at both ends of the shaft.
 
Three, the characteristics of formal and reverse installation
 
German FAG angular contact ball bearings and tapered roller bearings are generally used in pairs. According to different adjustment, installation and use occasions, there are two arrangements and installation methods as follows:
 
1. Formal installation (the narrow end faces of the outer ring are opposite) when the pressure center distance of two angular contact ball bearings or tapered roller bearings is less than the span of the two bearings, it is called formal installation. The shaft system in this way has a simple structure and is easy to assemble and disassemble and adjust. However, the thermal elongation of the shaft will reduce the axial clearance of the bearing, and may even jam.
 
2. Reverse mounting (the wide end faces of the outer ring are opposite) when the pressure center distance of two angular contact ball bearings or tapered roller bearings is greater than the span between the two bearings, it is called reverse mounting. Obviously, the thermal expansion of the shaft will increase the bearing的axial clearance. In addition, the structure of reverse installation is more complicated, and it is inconvenient to install and disassemble and adjust.
 
Four, performance characteristics
 
1. German FAG angular contact ball bearings are mostly used in pairs for small-span rigid dual-support shafts or precision spindles. Dongguan fag bearing manufacturers recommend that you carefully adjust the clearance when using them, and change the axial distance between the inner and outer rings of the bearing. Adjust the internal clearance of the bearing. At the same time, several sets of bearings can be installed in parallel and given a certain amount of pre-interference, which can improve the rigidity of the bearing system.
 
2. A single angular contact ball bearing can only bear axial load in one direction, while other bearings need to be configured to offset its additional axial force. When installed in pairs, the additional axial force will cancel each other out, and it can bear two It has an upward axial load, and has a strong axial limit ability in two directions.
 
3. Generally, two sets of bearings are installed in pairs, with the wide end faces of the outer ring facing each other (back-to-back) or narrow end faces (face-to-face). The rigidity of the bearing system is installed back to back. In order to facilitate the installation in pairs or groups, the bearings of pairs, three sets and four sets of bearings are processed in the same batch, with good consistency, the load is relatively uniform during use, and the additional axial forces cancel each other thoroughly. .
 
The above is the answer to the question of what are the characteristics of German FAG angular contact ball bearings. German FAG angular contact ball bearings have inner and outer raceways, which can withstand larger loads, and the effect will be better when used in pairs. It has the advantages of large bearing capacity, high speed, high stability, etc. It is a bearing with high precision and low noise.