SKF four-point contact ball bearings designation follow a system that may consist of a basic designation with or without one or more prefixes and/or suffixes.
|
3 |
Suffixes - Internal design (n.a.) |
|
4 |
Suffixes - External design (seals, snap ring groove etc.) |
|
N2 |
Two locating slots (notches) in one outer ring side face, 180° apart |
|
5 |
Suffixes - Cage design |
|
FA |
Machined steel cage, outer ring centred |
|
MA |
Machined brass cage, outer ring centred. |
|
PHAS |
Glass fibre reinforced PEEK cage, with lubrication grooves in the guiding surface, outer ring centred |
|
6.1 |
Suffixes - Materials, heat treatment (n.a.) |
|
6.2 |
Suffixes - Accuracy, clearance, preload, quiet running |
|
P6 |
Dimensional and geometrical tolerances to class P6 |
|
P62 |
P6 + C2 |
|
P63 |
P6 + C3 |
|
P64 |
P6 + C4 |
|
P6CNL |
P6 + CNL |
|
CNL |
Axial internal clearance in the lower half of the Normal range |
|
C2 |
Axial internal clearance smaller than Normal |
|
C2H |
Axial internal clearance in the upper half of the C2 range |
|
C2L |
Axial internal clearance in the lower half of the C2 range |
|
C3 |
Axial internal clearance greater than Normal |
|
C4 |
Axial internal clearance greater than C3 |
|
344524 |
C2H + CNL |
|
6.3 |
Suffixes - Bearing sets, matched bearings (n.a.) |
|
6.4 |
Suffixes - Stabilization |
|
S1 |
Bearing rings heat stabilized for operating temperatures ≤ 200 °C (390 °F) |
|
6.5 |
Suffixes - Lubrication (n.a.) |
|
6.6 |
Suffixes - Other variants |
|
309829 |
Larger balls |
oterh articles about SKF ball bearings
