They can be close together in pairs, or they can be separated by washers or sleeves. In some design arrangements, more than three bearings are arranged together according to the requirements of the main shaft. High-speed spindles (such as internal grinding tools) mostly use a single bearing, and compression springs are often used to eliminate the gap between the inner and outer rings of the bearing and the balls.
There are generally three different arrangements of this bearing:
After installation in this way, the connection between the ball of the bearing and the contact points of the inner and outer rings, that is, the contact angle line spreads along the direction of the rotation axis, thus increasing the radial and axial rigidity and the maximum resistance to deformation.
Installed in this way, the connection between the bearing ball and the contact points of the inner and outer rings, that is, the contact angle line converges along the direction of the rotation axis. At this time, the original gap between the outer rings began to disappear.
3, The same arrangement
With this type of bearing installed, two preloaded radial ball bearings can share the working load. This arrangement makes the bearing contact angles in the same direction and parallel, but in order to ensure the axial stability of the installation, two bearings in the same direction must be placed on opposite ends of the shaft.