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 (→ Basic bearing designation system).
An example and the applicable options for single row deep groove ball bearings with fillings slots are given below.
Basic bearing designation system


314-2ZNRwhere314 =Test Designation 2
-2ZNR =Test Designation 4
Test Designation 1Prefixes (n. a.)

Test Designation 2Basic designation
Bearing in the 02 dimension series
3..Bearing in the 03 dimension series
Similar to table 1

Catalogue image - Test Designation 3Suffixes - Internal design (n. a.)

Test Designation 4Suffixes - External design (seals, snap ring groove etc.)
Snap ring groove in the outer ring
NRSnap ring groove in the outer ring, with appropriate snap ring
-Z, -2ZShield on one or both sides
-ZNRShield on one side, snap ring groove in the outer ring, snap ring on the opposite side of the shield
-2ZNRShield on both sides, snap ring groove in the outer ring, with snap ring

Catalogue image - Test Designation 5Suffixes - Cage design (n. a.)

Stamped steel cage, ball centred

Catalogue image - Test Designation 6.1Suffixes - Materials, heat treatment (n. a.)

Test Designation 6.2Suffixes - Accuracy, clearance, preload, quiet running (n. a.)

Catalogue image - Test Designation 6.3Suffixes - Bearing sets, matched bearings (n. a.)

Test Designation 6.4Suffixes - Stabilization (n. a.)

Test Designation 6.5Suffixes - Lubrication
Grease suffixes (table 2)

Test Designation 6.6Suffixes - Other variants (n. a.)
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