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 single row tapered roller bearings are given below.
Basic bearing designation system

Examples

32206 BJ2/QCL7CVA606where32206 =
B =
J2 =
Q, CL7C =
VA606 =
23690/23620/QCL7Cwhere23690/23620 =
Q, CL7C =
32232T179 J2/DB32C230where32232 =
T179 =
J2 =
DB32, C230 =
Single bearings
Test Designation 1Prefixes
E2.SKF Energy Efficient bearing
JMetric bearing following the ABMA designation system (ANSI/ABMA Std. 19.2-2013)
T
Metric bearing in accordance with ISO 355:2007

Test Designation 2Basic designation
Refer to Bearing designations or drawing number identification

Catalogue image - Test Designation 3Suffixes - Internal design
BSteep contact angle

Test Designation 4Suffixes - External design (seals, snap ring groove etc.)
R
Flanged outer ring
XBoundary dimensions changed to conform to ISO

Catalogue image - Test Designation 5Suffixes - Cage design
J
Stamped steel cage, roller centred. A number following the J indicates a different cage design.
TN9Glass fibre reinforced PA66 cage, roller centred
TNH
Glass fibre reinforced PEEK cage, roller centred

Catalogue image - Test Designation 6.1Suffixes - Materials, heat treatment
HA1Case-hardened inner and outer rings
HA2Case-hardened outer ring
HA3Case-hardened inner ring
HA4
Case-hardened inner and inner rings and rollers
HA5Case-hardened rollers
HB1
Bainite-hardened inner and outer rings
HN3Inner ring with special surface heat treatment
L4B
Bearing rings and rollers with special surface coating

Test Designation 6.2Suffixes - Accuracy, clearance, preload, quiet running
/1
/-1

to

/-3
/4
Deviating width tolerances of cups and cones for inch bearings (table 1)
CL0Accuracy to ABMA tolerance class 0 (inch bearing)
CL00Accuracy to ABMA tolerance class 00 (inch bearing)
P5
Dimensional and running accuracy to P5 tolerance class
U..
U combined with a one- or two-digit number identifies reduced total width tolerance, e.g.:
U2 … +0,05/0 mm
U4 … +0,10/0 mm
W
Modified ring width tolerance to +0,05/0 mm

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

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

Test Designation 6.5Suffixes - Lubrication (n.a.)

Test Designation 6.6Suffixes - Other variants
CL7APinion bearing, superseded by CL7C
CL7CHigh-performance design
CLNReduced tolerances for ring widths and total (abutment) width in accordance with ISO tolerance class 6X
PEX
SKF Explorer bearing on customer request
QOptimized contact geometry and surface finish
V001
CL7C and /2
VA321Optimized internal design
VA606Crowned raceway on the outer ring, logarithmic profile on the inner ring and special heat treatment
VA607Same as VA606, but other outside diameter tolerance
VB022Chamfer dimension of large outer ring side face 0,3 mm
VB026Chamfer dimension of large inner ring side face 3 mm
VB061Chamfer dimension of large inner ring side face 8 mm
VB134Chamfer dimension of large inner ring side face 1 mm
VB406Chamfer dimension of large inner ring side face 3 mm and of large outer ring side face 2 mm
VB481Chamfer dimension of large inner ring side face 8,5 mm
VC027
Modified internal geometry for increased permissible misalignment
VC068
Increased running accuracy and special heat treatment
VE141
One locating slot (notch) in the outer ring
VE174One locating slot (notch) in the large side face of the outer ring, improved running accuracy
VQ051Modified internal geometry for increased permissible misalignment
VQ117Special radial and axial run-out
VQ267Reduced inner ring width tolerance to ± 0,025 mm
VQ492Special inner ring width tolerance
VQ494Reduced radial run-out
VQ495
CL7C with reduced or shifted tolerance range for the outside diameter
VQ506
Reduced inner ring width tolerance
VQ507
CL7C with reduced or shifted tolerance range for the outside diameter
VQ523
CL7C with reduced inner ring width tolerance and reduced or shifted tolerance range for the outside diameter
VQ601
Accuracy to ABMA tolerance class 0 (inch bearing)
Matched bearings
Test Designation 1Prefixes
E2.SKF Energy Efficient bearing
T
Metric bearing in accordance with ISO 355:2007

Test Designation 2Basic designation
Refer to Bearing designations or drawing number identification

Catalogue image - Test Designation 3Suffixes - Internal design
BSteep contact angle

Test Designation 4Suffixes - External design (seals, snap ring groove etc.)
T..
A number immediately following the T identifies the total width of matched bearings, arranged back-to-back or in tandem.
XBoundary dimensions changed to conform to ISO

Catalogue image - Test Designation 5Suffixes - Cage design
J
Stamped steel cage, roller centred. A number following the J indicates a different cage design.

Catalogue image - Test Designation 6.1Suffixes - Materials, heat treatment
HA1Case-hardened inner and outer rings
HA5Case-hardened rollers

Test Designation 6.2Suffixes - Accuracy, clearance, preload, quiet running
CL7CHigh-performance design
Q
Optimized contact geometry and surface finish
P5
Dimensional and running accuracy to P5 tolerance class
U..
U combined with a one- or two-digit number identifies reduced total width tolerance, e.g.:
U2 … +0,05/0 mm
U4 … +0,10/0 mm
W
Modified ring width tolerance to +0,05/0 mm

Catalogue image - Test Designation 6.3Suffixes - Bearing sets, matched bearings
DB..
Two bearings matched for mounting back-to-back. A number immediately following the DB identifies the design of the ring spacers.
DF..
Two bearings matched for mounting face-to-face. A number immediately following the DF identifies the design of the ring spacer.
DT..
Two bearings matched for mounting in tandem. A number immediately following the DT identifies the design of the ring spacers.
C...
Special clearance. The two- or three-digit number immediately following the C is the mean axial internal clearance in μm. The range remains the same as specified in table 2.

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

Test Designation 6.5Suffixes - Lubrication (n.a.)

Test Designation 6.6Suffixes - Other variants
PEX
SKF Explorer bearing on customer request
VA321Optimized internal design
VA606Crowned raceway on the outer ring, logarithmic profile on the inner ring and special heat treatment
VA607Same as VA606, but other outside diameter tolerance
VB022Chamfer dimension of large outer ring side face 0,3 mm
VB026Chamfer dimension of large inner ring side face 3 mm
VB061Chamfer dimension of large inner ring side face 8 mm
VB134Chamfer dimension of large inner ring side face 1 mm
VB406Chamfer dimension of large inner ring side face 3 mm and of large outer ring side face 2 mm
VB481Chamfer dimension of large inner ring side face 8,5 mm
VC027
Modified internal geometry for increased permissible misalignment
VC068
Increased running accuracy and special heat treatment
VE141
One locating slot (notch) in the outer ring
VE174One locating slot (notch) in the large side face of the outer ring, improved running accuracy
VQ051Modified internal geometry for increased permissible misalignment
VQ117Special radial and axial run-out
VQ267Reduced inner ring width tolerance to ± 0,025 mm
VQ492Special inner ring width tolerance
VQ494Reduced radial run-out
VQ495
CL7C with reduced or shifted tolerance range for the outside diameter
VQ506
Reduced inner ring width tolerance
VQ507
CL7C with reduced or shifted tolerance range for the outside diameter
VQ523
CL7C with reduced inner ring width tolerance and reduced or shifted tolerance range for the outside diameter
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