Angular Contact Ball Bearings
70..C, 72..C, 72.., 73.., 72..B, 73..B
The raceways of both the inner and outer rings of this bearing type are made with a set contact angle.
These bearings are non-separable. Since the balls are inserted utilizing counter-bore construction, a larger number of balls can be installed than in the case of Deep Groove ball bearings.
Standard cage materials may be pressed steel, high- strength brass, or polyamide. Cage materials is dependant on the bearing series and or service condition. Single-row Angular Contact ball bearings can sustain radial, axial or composite loads, however, any axial load must be in one direction. This bearing type is generally used in pairs to handle the induced load resulting from the internal axial force generated by the applied radial load. When mounting two single bearings in adjacent positions, NACHI provides these combination parts (pairs) with preadjusted clearance. Paired combination bearings are matched sets. Combination or paired bearings can be arranged BACK-TO-BACK (DB), FACE-TO-FACE(DF), or in TANDEM (DT). DB or DF sets can sustain bidirectional axial loads.
Double-row Angular Contact Ball Bearings
52.., 53.., 52..ZZ, 53..ZZ
The construction of this type ball bearing is similar to the adjacent, BACK-TO-BACK mounting of two Single-row Angular Contact ball bearings. Because fewer balls can be inserted per row compared to Single-row Angular Contact ball bearings, a Double-row Angular Contact ball bearing will have less load capacity than an equivalent size/series BACK-TO-BACK set of two Single-row Angular Contact ball bearings. This bearing type can sustain radial, moment and bi-directional axial loads.