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 CARB toroidal roller bearings are given below.
Basic bearing designation system


C 2212 KTN9
whereC 2212 =
K =
TN9 =

Test Designation 1
ZEBearing with SensorMount feature

Test Designation 2
Basic designation
Listed in table 1

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

Test Designation 4
Suffixes - External design (seals, snap ring groove etc.)
-CS5, -2CS5
Contact seal, HNBR, on one or both sides
-NS, -2NSContact seal, NBR, on one or both sides
Tapered bore, taper 1:12
Tapered bore, taper 1:30

Catalogue image - Test Designation 5
Suffixes - Cage design
Stamped steel cage, roller centred
MMachined brass cage, roller centred
MB, MB1Machined brass cage, inner ring centred
TN9Glass fibre reinforced PA46 cage, roller centred
VFull complement of rollers (no cage)

Catalogue image - Test Designation 6.1
Suffixes - Materials, heat treatment
HA3Case-hardened inner ring

Test Designation 6.2
Suffixes - Accuracy, clearance, preload, quiet running
C08Geometrical tolerances to class P5
C2Radial internal clearance smaller than Normal
Radial internal clearance greater than Normal
Radial internal clearance greater than C3
Radial internal clearance greater than C4

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

Test Designation 6.4
Suffixes - Stabilization
Bearing rings heat stabilized for operating temperatures ≤ 300 °C (570 °F)

Suffixes - Lubrication
GEM9Filled to 70 – 100% with SKF LGHB 2 grease

Test Designation 6.6
Suffixes - Other variants
VE240Bearing with shorter rollers
VG114Surface-hardened stamped steel cage
Full complement bearing without retaining ring
Filled to 25 – 45% with SKF LGEP 2 grease
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