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 spherical roller bearings are given below.
Basic bearing designation system

Example

24013 CCK30/W33
where24013 =
CC=
K30 =
W33 =

Applicable options for spherical roller bearings


Test Designation 1
Prefixes
BS2-..
Bearing, designated by a drawing number
E2.
SKF Energy Efficient bearing
ZE
Bearing with SensorMount feature

Test Designation 2
Basic designation
Listed in table 1
Figure with four digits: drawing number identification

Catalogue image - Test Designation 3
Suffixes - Internal design
CA, CAC
Retaining flanges on the inner ring, guide ring centred on the inner ring, machined brass cage
CC(J), CJ
Flangeless inner ring, guide ring centred on the inner ring, two stamped steel cages
CCJA, EJA
Flangeless inner ring, guide ring centred on the outer ring raceway, two stamped steel cages
E
Optimized internal design for increased load carrying capacity
213, 222 and 223 series: Flangeless inner ring and two stamped steel cages. Annular groove and three lubrication holes in the outer ring.
d ≤ 65 mm: Guide ring centred on the inner ring
d > 65 mm: Guide ring centred on the cage

Test Designation 4
Suffixes - External design (seals, snap ring groove etc.)
-CS, -2CS
Contact seal, NBR, on one or both sides
-CS2, -2CS2
Contact seal, FKM, on one or both sides
-CS5, -2CS5
Contact seal, HNBR, on one or both sides
K
Tapered bore, taper 1:12
K30
Tapered bore, taper 1:30

Catalogue image - Test Designation 5
Suffixes - Cage design
F
Machined steel cage, inner ring centred
FA
Machined steel cage, outer ring centred
J
Stamped steel cage, inner ring centred
JA
Stamped steel cage, outer ring centred
MA
Machined brass cage, outer ring centred

Test Designation 6.6
Suffixes - Materials, heat treatment
235220
Case-hardened inner ring with a helical groove in the bore
HA3
Case-hardened inner ring


Suffixes -Accuracy, clearance, preload, quiet running
C08
Running accuracy to P5 tolerance class
C083
C08 + C3
C084
C08 + C4
C2
Radial internal clearance smaller than Normal
C3
Radial internal clearance greater than Normal
C4
Radial internal clearance greater than C3
C5
Radial internal clearance greater than C4
P5
Dimensional and running accuracy to P5 tolerance class
P6
Dimensional and running accuracy to P6 tolerance class
P62
P6 + C2

Test Designation 6.4
Suffixes - Bearing sets, matched bearings(n.a.)

Catalogue image - Test Designation 6.3
Suffixes -Stabilization (n.a.)

Test Designation 6.5
Suffixes - Lubrication
GEM9
Filled to 70 – 100% with SKF LGHB 2 grease
VT143
Filled to 25 – 45% with SKF LGEP 2 grease
VT143B
Filled to 45 – 60% with SKF LGEP 2 grease
VT143C
Filled to 70 – 100% with SKF LGEP 2 grease
W64
Solid Oil
W
Without annular groove and lubrication holes in the outer ring
W20
Three lubrication holes in the outer ring
W26
Six lubrication holes in the inner ring
W33
Annular groove and three lubrication holes in the outer ring
W33X
Annular groove and six lubrication holes in the outer ring
W77
Plugged W33 lubrication holes
W513
W26 + W33

Catalogue image - Test Designation 6.1
Suffixes - Other variants
VA405
Bearing for vibratory applications, surface-hardened stamped steel cages
VA406
Same as VA405, but PTFE coated cylindrical inner ring bore
VE552(E)
Outer ring with three equally-spaced threaded holes in one side face to accommodate
lifting tackle. The E indicates that appropriate eye bolts are supplied with the bearing.
VE553(E)
Same as VE552(E), but threaded holes in both side faces
VG114
Surface-hardened stamped steel cages
VQ424
Running accuracy better than C08
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