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Bearing data

Dimension
standards
Boundary dimensions: ISO 15
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 (table 1)
Tolerances

For additional information
→ Tolerances
Normal dimensional and geometrical tolerances
Except for:
  • SKF Explorer and 33 DNRCBM series:
    • P6 dimensional tolerance
    • P6 geometrical tolerance
  • drawing number bearings:
    • outer ring to Normal
    • inner ring to P6 or P5
    • geometrical tolerance at least to class P6

Values: ISO 492 (table 2, table 3, table 4)

Contact angle

  • 32 A and 33 A series: 30°
  • 33 D series: 45°
  • 33 DNRCBM series: 40°
Internal clearance

For additional information
→ Selecting internal clearance or preload
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.

Permissible misalignment

≈ 2 minutes of arc


Misalignment increases bearing noise and reduces bearing service life, and when it exceeds the guideline values, these effects become particularly noticeable.

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