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Rolling Bearings: Terminology

To better understand frequently used bearing terms, definitions are provided below and explained with the help of drawings. A detailed collection of bearing specific terms and definitions can be found in ISO 5593:1997: Rolling bearings - Vocabulary.

Bearing arrangement

  1. Cylindrical roller bearing
  2. Four-point contact ball bearing
  3. Housing
  4. Shaft
  5. Shaft abutment shoulder
  6. Shaft diameter
  7. Locking plate
  8. Radial shaft seal
  9. Distance ring
  10. Housing bore diameter
  11. Housing bore
  12. Housing cover
  13. Snap ring

Following terminology is used for the different parts of a rolling bearing.

Radial bearings

   

  1. Inner ring
  2. Outer ring
  3. Rolling element: ball, cylindrical roller, needle roller, tapered roller, spherical roller
  4. Cage
  5. Capping device
    • Seal – made of elastomer, contact (shown in figure) or non-contact
    • Shield – made of sheet steel, non-contact
  6. Outer ring outside diameter
  7. Inner ring bore
  8. Inner ring shoulder diameter
  9. Outer ring shoulder diameter
  10. Snap ring groove
  11. Snap ring
  12. Outer ring side face
  13. Seal anchorage groove
  14. Outer ring raceway
  15. Inner ring raceway
  16. Sealing groove
  17. Inner ring side face
  18. Chamfer
  19. Mean bearing diameter
  20. Total bearing width
  21. Guiding flange
  22. Retaining flange
  23. Contact angle
  24. Thrust bearings

  25. 24 Shaft washer
  26. 25 Rolling element and cage assembly
  27. 26 Housing washer
  28. 27 Housing washer with sphered seat surface
  29. 28 Sphered seat washer


Principles of bearing selection and application | Bearing terminology | Bearing types | Selection of bearing type | Available space | Loads | Misalignment | Precision | Speed | Quiet running | Stiffness | Axial displacement | Mounting and dismounting | Integral seals
Bearing terminology | Y-bearings | Deep groove ball bearings | Needle roller bearings | Combined cylindrical roller/taper roller bearings | Cylindrical roller bearings | Angular contact ball bearings | Combined needle roller bearings | Spherical roller bearings | Tapered roller bearings | Thrust ball bearings | CARB® toroidal roller bearings | Cylindrical roller thrust bearings | Angular contact thrust ball bearings | Tapered roller thrust bearings | Needle roller thrust bearings | Track runner bearings | Spherical roller thrust bearings | Indexing roller units | Backing bearings for cluster mills | Other SKF rolling bearings | Bearing accessories | Engineering products | Mechatronics

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This page is still under construction. All bearing information remains the property and copyright of SKF Group.