SKF sealed self-aligning ball bearings

SKF self-aligning ball bearings have two rows of balls, a common sphered raceway in the outer ring and two deep uninterrupted raceway grooves in the inner ring. Sealed bearings equipped with contact seals on both sides are available:

  • in the 22 and 23 series 
  • with bore diameter from 10 to 70 mm 
  • with seals made of sheet steel reinforced NBR (oil and wear-resistant, designation suffix 2RS1) 

Permissible angular misalignment of sealed bearings is slightly reduced compared to open design bearings. 

Greases for capped bearings

SKF sealed self-aligning ball bearings on both sides are lubricated for the life of the bearing and are virtually maintenance-free. They are filled with one of the following standard greases, which have good corrosion inhibiting properties:

  • D ≤ 62 → MT47 grease
  • D > 62 → MT33 grease

Grease life for SKF sealed self-aligning ball bearings

  • is presented as L10, i.e. the time period at the end of which 90% of the bearings are still reliably lubricated
  • depends on the operating temperature and the speed factor.
The grease life is valid for the following combination of operating conditions:
  • horizontal shaft
  • inner ring rotation
  • light load (P ≤ 0,05 C)
  • operating temperature within the green temperature zone of the grease
  • stationary machine
  • low vibration levels 

Where the operating conditions differ, the grease life obtained from the diagram should be adjusted:

  • vertical shafts → 50% of the obtained value
  • heavier loads (P > 0,05 C) →  apply reduction factor


SKF sealed self-aligning ball bearings

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