How do angular contact ball bearings look?

Angular contact ball bearings are mainly used to adjust the axial clearance. In general, they are used in pairs, which can avoid causing additional axial force, and can limit the bearing in the axial clearance range in both directions. However, the specific positive and negative installation method of angular contact ball bearing should be combined according to the specific use situation.
First, positive and negative judgment method of angular contact ball bearing
The front side of angular contact ball bearing is the thin side of the outer ring, and the reverse side is the thick side of the outer ring. If there is a "<" symbol on the bearing, the sharp Angle is opposite and the opening is opposite. The difference between positive and negative mounting of angular contact ball bearings lies in the different installation methods. The tightness of positive and negative matching directly affects the size of bearing clearance, which relates to the running accuracy and service life of bearings.
Two, angular contact ball bearing positive and negative installation method
1. Forward installation (face to face installation)
The wide side on the outside, the narrow side on the inside, the other narrow side on the inside, the wide side on the outside, that is, the narrow end facing the narrow end, is face-to-face contact. During installation, the contact Angle of the bearing converges towards the axis of rotation, and the rigidity of its supporting Angle is small. Because the inner ring of the bearing extends out of the outer ring, when the outer rings of the two bearings are pressed together
When, the original clearance of the outer ring is eliminated, which can increase the preloading load of the bearing. The shafting in this way has the advantages of simple structure, convenient installation, disassembly and adjustment. However, the heat extension of the shaft will reduce the axial clearance of the bearing, or even get stuck.
2. Reverse installation (back-to-back installation)
The narrow side on the outside, the wide side on the inside, the other wide side on the inside, the narrow side on the outside, that is, the wide end facing the wide end, is back-to-back contact. During installation, the contact Angle line of the bearing is diffused along the axis of rotation, which can increase the radial and axial supporting Angle rigidity, provide a bearing configuration with relatively high rigidity, and can withstand overturning moment. When installing, it is necessary to master the clearance adjustment skills of angular contact ball bearing, because the thermal expansion of the shaft will increase the axial clearance of the bearing, the structure of the reverse installation is more complex, and the installation, disassembly and adjustment are inconvenient.
Three, angular contact ball bearing positive and negative installation requirements
1. The positive and negative coordination of angular contact ball bearings should be determined according to the type, size, load, speed and whether the inner and outer rings rotate.
2. Angular contact ball bearings are standard parts. The inner ring and journal are matched with the base hole system, and the outer ring and seat hole are matched with the base shaft system. The higher the rotational speed of the ring, the greater the load and vibration and the greater the change in working temperature, the tighter the fit should be used.
3. Loose fit should be adopted for stationary rackets, walking rackets or angular contact ball bearings that are often removed.
4. When designing the combination of angular contact ball bearings, the installation and disassembly of bearings must be considered.
5. The inner ring of angular contact ball bearing and uranium neck are usually tight, and the bearing can be pressed to the journal by applying extra force on the inner ring.
6, large size angular contact ball bearings, bearings can be heated in 80°C~ 120C oil after hot loading.
7. Special disassembly tools shall be used to disassemble angular contact ball bearings. In order to facilitate disassembly of bearings, the inner ring is on the shaft shoulder. Sufficient height should be exposed or slotted in the shaft shoulder to fit the hook end of the removal tool.