The designation of SKF high-capacity cylindrical roller bearings follow SKF basic designation with or without one or more prefixes and/or suffixes
|
1 |
Prefixes |
|
L |
Separate inner or outer ring of a separable bearing |
|
R |
Inner or outer ring with roller and cage assembly of a separable bearing |
|
3 |
Suffixes - Internal design |
|
EC |
Optimized internal design incorporating more and/or larger rollers and with modified roller end / flange contact |
|
4 |
Suffixes - External design (seals, snap ring groove etc.)(n.a.) |
|
5 |
Suffixes - Cage design |
|
JA |
Sheet steel cage, outer ring centred |
|
JB |
Sheet steel cage, inner ring centred |
|
MH |
Machined brass cage, inner ring raceway centred |
|
6.1 |
Suffixes - Materials, heat treatment |
|
L4B |
Bearing rings and rollers black oxidized |
|
L5B |
Rollers black oxidized |
|
L7B |
Inner ring and rollers black oxidized |
|
6.2 |
Suffixes - Accuracy, clearance, preload, quiet running |
|
CN |
Normal radial internal clearance; only used together with an additional letter that identifies a reduced or displaced clearance range
-
H = Reduced clearance range corresponding to the upper half of the actual clearance range
-
L = Reduced clearance range corresponding to the lower half of the actual clearance range
-
M = Reduced clearance range corresponding to the middle half of the actual clearance range
The above letters are also used together with the clearance classes C2, C3, C4 and C5, e.g. C2H |
|
C2 |
Radial internal clearance smaller than Normal |
|
C3 |
Radial internal clearance greater than Normal |
|
C4 |
Radial internal clearance greater than C3 |
|
C5 |
Radial internal clearance greater than C4 |
|
6.3 |
Suffixes - Bearing sets, matched bearings |
|
DR |
Set of two matched bearings |
|
TR |
Set of three matched bearings |
|
QR |
Set of four matched bearings |
|
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 |
|
PEX |
SKF Explorer bearing, used only when same-sized conventional and SKF Explorer bearings are available |
oterh articles about SKF roller bearings
