IBC High precision angular contact ball bearing sets

The minimum bearing arrangement of a spindle uses a single high precision angular contact ball bearing on each side. Both are thus arranged at a greater distance. The required preload in this arrangement is set with a defined tightening torque - either by means of a suitable locknut, or with a ground-in flange cover. Of great importance for the functionality of this angular contact ball bearing arrangement is the correct alignment of the two individual high-precision angular contact ball bearings.

If this is not the case, the service life may be reduced due to the occurrence of increased friction losses and the associated higher operating temperatures. If the load carrying capacity of a single bearing is not sufficient, or if the bearing position must support axial forces in both directions, high precision angular contact ball bearings with universally ground-in preload are used in sets.

During the production process, IBC high precision angular contact ball bearing sets are matched to each other in such a way that the pre-determined preload value of the individual bearing in the set is maintained and the load support in the angular contact ball bearing set is evenly distributed over the individual bearings.

Arrangements

Support of axial loads in both directions is made possible by the O- and X- arrangement of two high precision angular contact ball bearings. High axial forces in only one direction are supported by a tandem arrangement. Even higher forces are supported by high precision angular contact ball bearing sets with more than two high precision angular contact ball bearings in one direction. The angular contact ball bearing set is therefore generally adjusted against another angular contact ball bearing or set that supports the axial load in the opposite load direction. Due to the diverging lines of contact, the O arrangement is better suited to absorb tilting moments.

Angular contact ball bearing sets in this arrangement result in a relatively rigid 

bearing arrangement in this sense. In contrast to the O arrangement, in the X arrangement the lines of contact converge towards the centre line separating the angular contact ball bearings. In this respect, the X arrangement is less rigid and somewhat more tolerant of tilting. In a tandem arrangement, the contact lines run parallel to each other and at the same angle to the line separating the angular contact ball bearings.

In addition, IBC offers other high precision angular contact ball bearing sets. For example, a combination of a tandem arrangement in O- or X-arrangement is made, if the design does not allow the angular contact ball bearings in tandem arrangement against another angular contact ball bearing or angular contact ball bearing set. If there are special requirements with regard to rigidity and bearing stress, tandem arrangements with three or four angular contact ball bearings are recommended.

Bearing sets with balanced preload

In contrast to arrangements of high precision angular contact ball bearings with the same preload, balanced angular contact ball bearing sets are also available. In this case, the high precision angular contact ball bearings with single preload are matched by a high precision angular contact ball bearing with double or triple preload value.

This design should be selected in particular if a high-precision angular contact ball bearing is placed against more than one single bearing and the unloading of that bearing is to be reliably avoided.

Misalignment

Misalignments should generally be avoided. They lead to a certain forced running, which increases the running noise and reduces the service life. The X arrangement is somewhat less sensitive compared to the O-arrangement.