3309 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
45 mm
 Bore diameter
D
100 mm
 Outside diameter
B
39.7 mm
 Width
d2
≈55.6 mm
 Recess diameter inner ring shoulder
D2
≈89.95 mm
 Recess diameter outer ring shoulder
r1,2
min.1.5 mm
 Chamfer dimension inner ring
a
58 mm
 Distance pressure point(s)

Calculation data

Basic dynamic load rating C
75 kN
Basic static load rating C0
53 kN
Fatigue load limit Pu
2.24 kN
Reference speed
7 500 r/min
Limiting speed
6 700 r/min
Calculation factor kr
0.07
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
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SKU: 3309 A-SKF Categories: , , ,
SKF

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

(3309A) (3309-A)

Additional information

Weight 1.29 kg
Size (mm)

Colour

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