3218 A

Double row angular contact ball bearing

Double row angular contact ball bearings correspond, in their design and operation, to a pair of single row angular contact ball bearings in a back-to-back arrangement, while requiring less axial space.

They can operate at high speeds and are more suitable than deep groove ball bearings for supporting large axial forces in both directions.

  • High-speed capability
  • Accommodate relatively high radial loads, high axial loads in both directions and tilting moments
  • Suitable where a stiff bearing arrangement is required
  • Require less axial space than equivalent pair of single row angular contact ball bearings

Dimensions

d
90 mm
Bore diameter
D
160 mm
Outside diameter
B
52.4 mm
Width
d1
111.53 mm
Shoulder diameter inner ring
D1
136.76 mm
Shoulder diameter outer ring
r1,2
min.2 mm
Chamfer dimension inner ring
a
94 mm
Distance pressure point(s)

Calculation data

Basic dynamic load rating C
130 kN
Basic static load rating C0
120 kN
Fatigue load limit Pu
4.55 kN
Reference speed
4 300 r/min
Limiting speed
3 600 r/min
Calculation factor kr
0.06
Limiting value e
0.8
Calculation factor X
0.63
Calculation factor Y0
0.66
Calculation factor Y1
0.78
Calculation factor Y2
1.24

Description

Properties

Contact angle : 30 °

Contact type Normal contact (two-point contact)
Number of rows 2
Locating feature, bearing outer ring None
Ring type One-piece inner and outer rings
Cage Sheet metal
Arrangement of contact angle (double-row bearing) Back-to-back (O)
Matched arrangement No
Universal matching bearing No
Axial internal clearance CN
Material, bearing Bearing steel
Coating Without
Sealing Without
Lubricant None
Relubrication feature Without

(90X160X52.4) (3218A)

Additional information

Weight 3.73 kg
Size (mm)

Colour

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