SKF angular contact ball bearing designation system

The designations of most SKF rolling bearings follow a system that may consist of a basic designation with or without one or more prefixes and/or suffixes

Examples and the applicable options for single row SKF angular contact ball bearings are given below.

  • 7210 BEP and 7210 BECBY

Basic designation

Figure with four digits: drawing number identification (more information: SKF bearing designation)

  • ALS: Inch bearing
  • AMS: Inch bearing

Bearing size for inch bearings

22 to 40: (/8) 2 3/4 in. (69,85 mm) bore diameter ---- (/8) 5 in. (127 mm) bore diameter

Suffixes

Internal design

  • A: 30° contact angle
  • AB: 20° contact angle (inch bearing) 
  • AC: 25° contact angle
  • B: 40° contact angle
  • E: Optimized internal design 

External design (seals, snap ring groove, execution etc.)

  • N1: One locating slot (notch) in one outer ring side face
  • CA: Bearing for universal matching. Two bearings arranged back-to-back or face-to-face have axial internal clearance smaller than Normal (CB).
  • CB: Bearing for universal matching. Two bearings arranged back-to-back or face-to-face have Normal axial internal clearance.
  • CC: Bearing for universal matching. Two bearings arranged back-to-back or face-to-face have axial internal clearance greater than Normal (CB).
  • G: Bearing for universal matching. Two bearings arranged back-to-back or face-to-face have axial internal clearance.
  • GA: Bearing for universal matching. Two bearings arranged back-to-back or face-to-face have light preload.
  • GB: Bearing for universal matching. Two bearings arranged back-to-back or face-to-face have moderate preload.
  • GC: Bearing for universal matching. Two bearings arranged back-to-back or face-to-face have heavy preload.
  • -2RZ: Non-contact seal, NBR, on both sides

Cage design

  • F: Machined steel cage, ball centred
  • J: Stamped steel cage, ball centred
  • M: Machined brass cage, ball centred; different designs are identified by a number following the M, e.g. M2
  • MB: Machined brass cage, inner ring centred
  • P: Glass fibre reinforced PA66 cage, ball centred
  • PH: Glass fibre reinforced PEEK cage, ball centred
  • Y: Stamped brass cage, ball centred

Accuracy, clearance, preload, quiet running

  • P5: Dimensional and geometrical tolerances to class P5
  • P6: Dimensional and geometrical tolerances to class P6

SKF angular contact ball bearing sets, matched bearings

  • DB: Two bearings matched for mounting back-to-back
  • DF: Two bearings matched for mounting face-to-face
  • DT: Two bearings matched for mounting in tandem

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