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.
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
