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 angular contact ball bearings are given below.
Basic bearing designation system

Examples

7210 BEPwhere7210 =
B, E =
P =
7210 BECBY
where7210 =
B, E =
CB =
Y =
Test Designation 1Prefixes (n.a.)

Test Designation 2Basic designation
Listed in table 1
Figure with four digits: drawing number identification
ALSInch bearing
AMSInch bearing
Bearing size for inch bearings

22

to

40

(/8) 2 3/4 in. (69,85 mm) bore diameter


(/8) 5 in. (127 mm) bore diameter


Catalogue image - Test Designation 3Suffixes - Internal design
A30° contact angle
AB
20° contact angle (inch bearing)
AC25° contact angle
B
40° contact angle
E
Optimized internal design

Test Designation 4Suffixes - External design (seals, snap ring groove, execution etc.)
N1
One locating slot (notch) in one outer ring side face
CABearing for universal matching. Two bearings arranged back-to-back or face-to-face have axial internal clearance smaller than Normal (CB).
CBBearing for universal matching. Two bearings arranged back-to-back or face-to-face have Normal axial internal clearance.
CCBearing for universal matching. Two bearings arranged back-to-back or face-to-face have axial internal clearance greater than Normal (CB).
GBearing for universal matching. Two bearings arranged back-to-back or face-to-face have axial internal clearance.
GABearing for universal matching. Two bearings arranged back-to-back or face-to-face have light preload.
GBBearing for universal matching. Two bearings arranged back-to-back or face-to-face have moderate preload.
GCBearing for universal matching. Two bearings arranged back-to-back or face-to-face have heavy preload.
-2RZ
Non-contact seal, NBR, on both sides

Catalogue image - Test Designation 5Suffixes - Cage design
FMachined steel cage, ball centred
JStamped steel cage, ball centred
MMachined brass cage, ball centred; different designs are identified by a number following the M, e.g. M2
MB
Machined brass cage, inner ring centred
PGlass fibre reinforced PA66 cage, ball centred
PHGlass fibre reinforced PEEK cage, ball centred
YStamped brass cage, ball centred

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

Test Designation 6.2Suffixes - Accuracy, clearance, preload, quiet running
P5Dimensional and geometrical tolerances to class P5
P6Dimensional and geometrical tolerances to class P6

Catalogue image - Test Designation 6.3Suffixes - Bearing sets, matched bearings
DBTwo bearings matched for mounting back-to-back
DFTwo bearings matched for mounting face-to-face
DTTwo bearings matched for mounting in tandem

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

Suffixes - Lubrication (n.a.)

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