Designation system
The designations of SKF polymer ball bearings follow a system that consists 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.
| 623/HR11TN
| where | 623 = |  |
| /HR = |  |
||
| 11T1 = |  |
|
| Basic designation |
| Listed in table 1
|
|
 | Suffixes - Cage design
|
| V
| Full complement of balls (no cage)
|
| Suffixes - Materials
|
| /HR
| Polymer ball bearing
|
|
| Suffixes - Material combination designation (table 2)
|
|
| Character 1 | Outer ring
|
|
| Character 2 | Inner ring
|
|
| Character 3 | Balls | |
| Character 4 | Cage or 2nd (alternate) ball material for full complement of balls
|
|
| Material codes: | ||
| 1
| Polyoxymethylene (POM) | |
| 2 | Polypropylene (PP) | |
| 3
| Polyethylene (PE) | |
| 6 | Polyetheretherketone (PEEK)
|
|
| 8 | Polyoxymethylene sooted (POM sooted)
|
|
| B | Polyethylene terephthalate (PET) | |
| D
| Ceramic ZrO2 | |
| K | Polyvinylidene fluoride (PVDF) | |
| L | Polyphenylensulfide (PPS) | |
| M | Polyimide (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 | |
