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
