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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).
Examples and the applicable options for cylindrical roller thrust bearings are given below.
Basic bearing designation system


Complete bearing
81132 TN
where81132 =
TN =

K 89438 MwhereK =
89438 =
M =
WS 81230whereWS =
81230 =
LS 130170whereLS =
130170 =

Applicable options for cylindrical roller thrust bearings

Test Designation 1
Housing washer
Cylindrical roller and cage thrust assembly
Shaft washer

Test Designation 2
Basic designation
Listed in table 1 or drawing number identification
Universal washer, the number following identifies the bore and outside diameter

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

Test Designation 4
Suffixes - External design (seals, snap ring groove, etc.) (n.a.)

Catalogue image - Test Designation 5
Suffixes - Cage design
Machined brass cage
Glass fibre reinforced PA66 cage

Catalogue image - Test Designation 6.1
Suffixes - Materials, heat treatment
HA1Case-hardened shaft and housing washers
Bainite-hardened shaft and housing washers

Test Designation 6.2
Suffixes - Accuracy, clearance, preload, quiet running
Dimensional and geometrical tolerances to class P5

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

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

Suffixes - Lubrication (n.a.)

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