Double row angular contact ball bearings are units with solid inner and outer rings and ball and cage assemblies with polyamide or sheet steel cages. Their construction is similar to a pair of single row angular contact ball bearings in an O arrangement but they are narrower to a certain extent.
The bearings are available in open and sealed designs. Due to the manufacturing processes used, open bearings can have turned recesses in the outer ring for seals or shields. Sealed bearings are maintenance-free and therefore allow particularly economical bearing arrangements.
Due to the raceway geometry and the two rows of balls, the bearing can support forces in both radial and axial directions. They are therefore particularly suitable for use in pumps and agricultural machinery. Furthermore, double row angular contact ball bearings are used in applications including conveying equipment, packaging equipment, elevators and compressors.
The angular adjustment facility of angular contact ball bearings is very limited. The adjustment angle should not exceed 2′.

Lower noise levels:
Due to the higher ball quality, improved raceway surfaces and the more precise dimensional and running tolerances to tolerance class P6, the internal friction in the bearings as well as the noise level of the application during operation is reduced.

Reduced friction:
Lower friction leads to reduced heat generation and thus a longer grease operating life. As a result, higher speeds or an extended operating life of the bearing can be achieved. In addition, this increases the energy efficiency of the application.

Improved sealing:
The innovative seal HRS is in axial contact with the inner ring in an undercut. It thus offers the optimum combination of maximum sealing effectiveness and minimal friction.

Higher cost-effectiveness:
Overall, these measures lead to greater economic benefit for the user. Double row angular contact ball bearings of X-life quality offer a longer operating life, especially in use under axial load conditions. The maintenance intervals in the specific applications can thus be extended. Due to the reduced friction, savings on energy consumption and operating costs can be achieved.

Radial and axial load carrying capacity:
Double row angular contact ball bearings can support axial loads in both directions and high radial loads. They are particularly suitable for bearing arrangements where rigid axial guidance is required.
The axial load carrying capacity is dependent on the contact angle; i.e. the larger the angle (α = 30°), the higher the axial load to which the bearing can be subjected.

Without filling slot:
Bearings of series 32..-BD and 33..-BD are self-retaining and do not have filling slots in the end faces of the bearing rings. The contact angle isα = 30°. Their axial load carrying capacity is the same in both directions. These bearings are highly versatile.

Sealing:
Series 32..-BD and 33..-BD with the suffixes 2HRS are sealed by lip seals on both sides. Contact seals are suitable for giving protection against dust, contamination and damp atmospheres. The new design of lip geometry, with axial contact and a dust deflector, has lower friction and thus generates less heat. This allows higher speeds.
Series with the suffix 2Z have gap seals of a labyrinth design on both sides. The undercuts and the sealing shield geometry are matched to each other.
Both sealing systems 2Z and 2HRS offer reliable protection against the egress of grease from the bearing and the ingress of contamination into the bearing.

Lubrication:
Sealed bearings are greased with a high quality grease and are lubricated for life. Open bearings are preserved using oil. In addition to the standard grease, special greases are also available by agreement for particular operating conditions.

Operating temperature:
Open bearings are suitable, depending on their outside diameter, for different operating temperature ranges. Bearings are available by agreement for temperatures up to +200 °C. 

Bearings with cages made from glass fibre reinforced polyamide are suitable for operating temperatures up to +120 °C, restricted by the cage material.
Bearings with the suffix 2HRS are suitable up to +110 °C, restricted by the lubricant and seal material.

Suffix:
BD Modified internal construction, contact angle α = 30°, without filling slot
TVH Solid polyamide snap cage, ball-guided
2HRS Lip seals on both sides
2Z Gap seals on both sides
C2 Axial internal clearance C2
C3 Axial internal clearance C3
C4 Axial internal clearance C4
S0 Dimensional stabilisation
S1 Dimensional stabilisation







Angular contact ball bearings 38..-B, double row, contact angle α = 25°
Angular contact ball bearings 38..-B-2RS, double row design, lip seals on both sides, contact angle α = 25°
Angular contact ball bearings 38..-B-2RZ, double row design, non-contact radial seals on both sides, contact angle α = 25°