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 self-aligning ball bearings are given below.
Example
2306 E-2RS1KTN9
| where | 2306 = |  |
| E = |  |
| 2RS1 = |  |
| K = | |
| TN9 = |  |
| Prefixes (n.a.) |
| Basic designation |
| Listed in table 1 |
| Suffixes - Internal design |
| E | Optimized internal design for increased load carrying capacity
|
| Suffixes - External design (seals, snap ring groove, etc.)
|
-2RS1
| Contact seal, NBR, on both sides
|
K
| Tapered bore, taper 1:12 |
| Suffixes - Cage design
|
M
| Machined brass cage, ball centred
|
TN9
| Glass fibre reinforced PA66 cage, ball centred
|
| Suffixes - Materials, heat treatment (n.a.)
|
| Suffixes - Accuracy, clearance, preload, quiet running |
C2
| Radial internal clearance smaller than Normal
|
C3
| Radial internal clearance greater than Normal
|
| Suffixes - Bearing sets, matched bearings (n.a.) |
| Suffixes - Stabilization (n.a.) |
| Suffixes - Lubrication |
W64
| Solid Oil
|
| Suffixes - Other variants (n.a.)
|
