Designation system

The designations of SKF polymer ball bearings follow a system that consist of a basic designation and suffixes (→ Basic bearing designation system).
The complete designation is printed on the package. Polymer deep groove ball bearings do not have the designation inscribed on the rings.
An example and the applicable options for polymer deep groove ball bearings are given below.
Basic bearing designation system
623/HR11TN
where623 =
HR =
11T1 =

Test Designation 2
Basic designation
Listed in table 1

Test Designation 4
Suffixes - Cage design (n. a.)

Test Designation 4
Suffixes - Materials
HR
Polymer ball bearing

Test Designation 2
Suffixes - Material combination designation (table 1)
Character 1Outer ring
Character 2Inner ring
Character 3Balls
Character 4Cage
Material codes:
1
Polyoxymethylene (POM)
2Polypropylene (PP)
3
Polyethylene (PE)
6Polyetheretherketone (PEEK)
8Polyoxymethylene sooted (POM sooted)
BPolyethylene terephthalate (PET)
D
Ceramic ZrO2
KPolyvinylidene fluoride (PVDF)
LPolyphenylensulfide (PPS)
MPolyimide (PI)
N
Polyamide 66 (PA66)
P
Brass
Q
Glass
R
Borosilicate glass
S
Stainless steel 1.4034
T
Stainless steel 1.4401
W
Titanium
X
Ceramic Si3N4
Z
Ceramic Al2O3



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