Single-Row Angular Contact Ball Bearings (Pressed Steel Cages & Machined Brass Cages)
Since these bearings
have a contact angle, they can sustain significant axial loads in one direction
together with radial loads. Because of their design, when a radial load is
applied, an axial force component is produced; therefore, two opposed bearings
or a combination of more than two must be used.
Since the rigidity of single-row angular contact ball bearings can be increased by preloading, they are often used in the main spindles of machine tools, for which high running accuracy is required.
Usually, the cages for angular contact ball bearings with a contact angle of 30° (Symbol A) or 40° (Symbol B) are in accordance with Table 1, but depending on the application, machined synthetic resin cages or molded polyamide resin cages are also used. The basic load ratings given in the bearing tables are based on the cage classification listed in Table 1.
Matched Angular Contact Ball Bearings
The types and features of matched angular Contact Ball bearings are shown in Table 2
Double-Row Angular Contact Ball Bearings
This is basically a back-to-back mounting of
two single-row angular contact ball bearings, but their inner and outer rings
are each integrated into one. Axial loads in both directions can be sustained,
and the capacity to sustain moments is good. This type is used as fixed-end
Their cages are pressed steel.
Four-Point Contact Ball Bearings
The inner ring is split radially into two
pieces. Their design allows one bearing to sustain significant axial loads in
The contact angle is 35°, so the axial load capacity is high. This type is suitable for carrying pure axial loads or combined loads where the axial loads are high.
The cages are made of machined brass.