What are Characteristics of Single Row Angular Contact Ball Bearings for Pair Mounting?

Pair mounting single row angular contact ball bearings are composed of two sets of single row angular contact ball bearings with the same specifications in a back-to-back (suffix code DB) face-to-face (suffix code DF) or tandem (suffix code DT) configuration. This kind of bearing can bear the radial load mainly radial, axial combined load. Can also withstand pure radial load. Tandem configuration can only withstand a single direction of the axial load, the other two configurations can withstand any direction of the axial load. Back-to-back grouping than face-to-face grouping bending performance and support performance is good, tandem grouping can withstand greater axial load. The angular contact ball bearings installed in pairs are generally combined by the manufacturer's choice and submitted to the user in pairs, which constitute a pair of single row angular contact ball bearings installed in pairs of individual bearings generally can not be interchanged after the installation of such bearings have pre-pressure interference collar and steel ball in the axial preload state, thus improving the whole group of bearings as a single bearing support stiffness and rotational accuracy.

Universal assembly that can be used back-to-back, face-to-face or tandem and other arbitrary way to assemble, and after installation can achieve the required preload value.

The technical content of assembled bearings is high and the processing is difficult. The rotational accuracy between any two sets of bearings in the same group, the mutual difference of inner and outer diameter, the mutual difference of contact angle and the parallelism difference of two end faces are strictly controlled. For the universal assembly bearing, in the role of the prescribed preload, but also the bearing inner and outer ring end face grinding, only in this way can make the assembly bearing in the work of uniform force, to achieve a good contact state, to ensure the quality of the bearing. But for ultra-high-precision machine tool spindle also need to directional assembly method.

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