Basic designation system for SKF standard metric ball and roller bearings
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| Code | Bearing type | Code | Bearing type | Code | Bearing type |
| 0 | Double row angular contact ball bearing | 7 | Single row angular contact ball bearing | QJ | Four-point contact ball bearing |
| 1 | Self-aligning ball bearing | 8 | Cylindrical roller thrust bearing | T | Tapered roller bearing
in accordance with ISO 355 |
| 2 | Spherical roller bearing, spherical roller thrust bearing | C | CARB toroidal roller bearing | ||
| 3 | Tapered roller bearing | N | Cylindrical roller bearing. Two or more letters are used to identify the number of the rows or the configuration of the flanges, e.g. NJ, NU, NUP, NN, NNU, NNCF
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| 4 | Double row deep groove ball bearing | ||||
| 5 | Thrust ball bearing | ||||
| 6 | Single row deep groove ball bearing | ||||
