SKF double row angular contact ball bearing designation

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.
An example and the applicable options for double row angular contact ball bearings are given below.

3206 A-2RS1TN9/MT33

Prefixes

  • E2: SKF Energy Efficient bearing

Basic designation

Listed in SKF bearing designation

Suffixes

Internal design

  • A: No filling slots
  • D: Two-piece inner ring

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

  • N: Snap ring groove in the outer ring
  • NR: Snap ring groove in the outer ring, with appropriate snap ring
  • CB: Controlled axial internal clearance
  • -2RS1: Contact seal, NBR, on both sides
  • -2Z: Shield on both sides

Cage design

  • –: Stamped steel cage, ball centred
  • J1: Stamped steel cage, ball centred (bearing with a two-piece inner ring)
  • M: Machined brass cage, ball centred
  • MA: Machined brass cage, outer ring centred
  • TN9: Glass fibre reinforced PA66 cage, ball centred

Accuracy, clearance, preload, quiet running

  • P5: Dimensional and geometrical tolerances to class P5
  • P6: Dimensional and geometrical tolerances to class P6
  • P62: P6 + C2
  • P63: P6 + C3
  • P64: P6 + C4
  • C2: Axial internal clearance smaller than Normal
  • C3: Axial internal clearance greater than Normal
  • C4: Axial internal clearance greater than C3

Lubrication

Lubrication

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SKF 3202 ATN9/C3 bearings
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SKF 3204 ATN9 bearings
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SKF 3206 A bearings
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SKF 3206 ATN9 bearings
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