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Bearing data

Dimension
standards
Boundary dimensions: ISO 15:2011

Except for:
  • bearing 3200 A:
    width = 14 mm instead of 14,3 mm
  • drawing number bearings:
    dimensions not standardized
  • snap rings and grooves:
    ISO 464:1995 (table 1)
Tolerances

For additional
information
(→ Tolerances)
Normal

Except for:
  • SKF Explorer and SKF E2 bearings, 33 DNRCBM series:
    P6
  • drawing number bearings:
    • outer ring to Normal
    • inner ring to P6 or P5
    • geometrical tolerance at least to class P6

Values: ISO 492:2014 (table 2, table 3, table 4)
Contact angle
  • 32 A and 33 A series: 30°
  • 33 D series: 45°
  • 33 DNRCBM series: 40°
  • Drawing number bearings: 40°
Internal
clearance


For additional
information
(→ Bearing internal clearance)

Normal
Check availability of C2, C3 or C4 clearance classes


Values: table 5, table 6

Values are valid for unmounted bearings under zero measuring load.

Misalignment

≈ 2 minutes of arc

The permissible angular misalignment between the inner and outer rings depends on the size and internal design of the bearing, the radial internal clearance in operation and the forces and moments acting on the bearing. As a result, only approximate values are listed here. Any misalignment increases bearing noise and reduces bearing service life.

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