The raceways of the single row angular contact ball bearings are in such position, that the connecting line of their contact points with the balls form an acute angle with the perpendicular line to the bearing axis, or contact angle.
Bearings of design B have a contact angle α = 40° and have a high number of balls with good conformability which ensures their high load rating.
They can carry radial loads acting simultaneously with high axial forces in one direction. Bearings are arranged in pairs so that axial guiding in both direction can be achieved.
Single row angular contact ball bearings of the design AA with a contact angle of α = 26° are used in applications with a higher axial load.
Bearings of the design B and AA are non-separable, although both rings have only one rib.
| ..AA metal cage, α = 26° | ..BTNG plastic cage, α = 40° |
| ..B metal cage, α = 40° | ..BETNG plastic cage, α = 40° bearing with higher load rating |
The boundary dimensions of the single row angular contact ball bearings indicated in the dimension tables, correspond to the international dimensional standard ISO 15.
The bearing designation in the standard design is shown in the dimension tables. Differences from the standard design are designated by additional symbols according to STN 02 4608.
The single row angular contact ball bearings are commonly manufactured with the normal tolerance class P0 (the symbol is not indicated). For special applications requiring a high accuracy or for higher rottational speeds, the bearings are supplied in the higher tolerance class P6. Limiting decviation values of the dimension and running accuracy are indicated in ISO 492.
The single row angular contact ball bearings are usualy mounted in pairs. The suitable operating clearance or preload is adjusted during mounting and depends on the arrangement design and operating conditions.
The single row angular contact ball bearings "B"
(α = 40°)
Pr = Fr for Fa/Fr ≤ 1,14
Pr = 0,35 + 0,57Fa for Fa/Fr > 1,14
The single row angular contact ball bearings "AA"
(α = 26°)
Pr = Fr for Fa/Fr ≤ 0,68
Pr = 0,41Fr + 0,87Fa for Fa/Fr > 0,68
The single row angular contact ball bearings "B"
(α = 40°)
Por = 0,5Fr + 0,26Fa
The single row angular contact ball bearings "AA"
(α = 26°)
Por = 0,5Fr + 0,37Fa
The single row angular contact ball bearings mounted in pairs are sensitive to the misalignment of bearing rings. Misalignment causes additional load on the bearings, which shortens their lifetime.
The single row angular contact ball bearings have a pressed steel cage which is not marked.
For special applications some bearings are manufactured with a polyamide cage (TNG).
Deliveries of bearings with this cage need to be discussed in advance.
