Angular contact ball bearings, single row


Single-row angular contact ball bearings are provided with raceways in the inner and outer ring which are offset to each other towards the bearing axis and accept axial forces only in one direction. Under radial loads, a force, which acts in axial direction, is developed in the bearing which must be compensated by a counter-force. Thus the bearings are positioned against a second bearing. The contact angle α (also contact angle α) is 40° for bearings with suffix B and for bearings without suffix 20° and/or 30°.
a?designates the angle which is enclosed by the connection line of the two contact points between ball and raceways with the radial place and under which the load is transmitted from one raceway to the other. Universal designs
The universal design of single-row angular ball bearings is intended for installation in pairs in X, O or tandem arrangement. Universal design means that the raceways and lateral faces of the rings are adapted to each other when manufacturing the bearing so that any bearing of the same size and design can be installed directly in the above mentioned arrangements.

The following universal designs should be
differentiated here:

Bearing arrangements
For assembling the following bearingarrangements, only universal design bearings with the same preload (e.g. UL) and the same tolerance class must be used. O and X arrangements are used to accept axial loads from both directions or to accept higher radial loads.
In the O arrangement, the large plane sides of the outer rings contact each other, while the small plane sides of the outer rings contact each other in the X arrangement. The O arrangement has a higher supporting width H than the X arrangement and thus a higher resistance against tilt.

Tandem arrangements including two or three bearings are used for carrying high axial loads in one direction. They insure a high rigidity of the shaft mounting. Bearings in tandem arrangement carry equal portions of the axial load.
The TO- and the TX-arrangements, like the tandem arrangement, are used for carrying high axial loads in one direction. The additional third bearing acts as a counterguidance changing the multiple arrangement into a fixed bearing.
The TOT-arrangement is employed as a fixed bearing in case of high radial loads and high axial loads from both directions. A very high rigidity is achieved with this arrangement. It is advisable not to install more than three bearings directly side by side, otherwise, the dissipation of heat will be impaired and lubricant supply to all bear ings will become difficult. For this reason, distance rings should be provided.
Radial bores in the outer distance ring enable an easy feeding of lubricant. All arrangements are available as set on request.

Distance rings
Distance rings can be used for every arrangement of angular contact ball bearings being in universal design. When making the distance rings, care must be taken to ensure that the inner and outer rings are of equal width and plane-parallel.

Tolerances for the outer and inner spacer ring max. permissible ratings in microns Bearing pairs with spacer ring Angular contact ball bearings can be supplied on customer’s request with finished adapted spacer rings ready for installation in tandem, O or X arrangement.
For bearing pairs with spacer rings, in particular installation of the bearings at the correct side should be noted. In order to avoid incorrect installation, thus the shared identity of the individual parts is indicated at the bearing pair by symbols (arrow at the outer diameter of the outer rings).

In single-row angular contact ball bearings, the cage consists of fiber-glass reinforced polyamide 66; the standard design in the diameter range of the bore up to approx. 130 mm. Here, too, the same limitations are applicable to the cage as with the deep groove ball bearing. In addition, cages of brass (standard, if cages do not consists of fiber-glass reinforced polyamide 66), steel sheet and/or brass plate can be supplied on request.

As standard, the single-row angular contact ball bearings are built with standard tolerance. Bearings with the tolerances P6, P5 or P4 are possible on request.

Other designs
Also angular contact ball bearings with ceramic balls or ceramic coating for current insulation up to 1000 Volts are available. SLF angular contact ball bearings can be supplied as „LONGLIFE“ version on request. Bearings of this design have a higher fatigue limit load as compared with the standard bearing. Bearing and package are identified by „LONGLIFE“.

Note: Please read also out separate catalogue for angular contact ball bearings of standard and high-precision design.


Tolerance Class



Width difference between inner and outer spacer ring



Width variation



Axial runout



Single-row angular contact ball bearing DIN 628-1103