SKF double row full complement cylindrical roller bearings nomenclature follow a system that may consist of a basic designation with or without one or more prefixes and/or suffixes.
|
3 |
Suffixes - Internal design |
|
CV |
Modified internal design, full complement roller set |
|
4 |
Suffixes - External design (seals, snap ring groove etc.) |
|
ADA |
Modified snap ring grooves in the outer ring; two-piece inner ring held together by a retaining ring (for bearings in the NNF 50 series) |
|
ADB |
ADA + modified internal design |
|
DA |
Modified snap ring grooves in the outer ring; two-piece inner ring held together by a retaining ring (for bearings in the 3194.. series) |
|
-2LS |
Contact seal, PUR, on both sides |
|
5 |
Suffixes - Cage design |
|
V |
Full complement of rollers (no cage) |
|
6.1 |
Suffixes - Materials, heat treatment |
|
HB1 |
Bainite-hardened inner and outer rings |
|
L4B |
Bearing rings 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
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H = Reduced clearance range corresponding to the upper half of the actual clearance range
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L = Reduced clearance range corresponding to the lower half of the actual clearance range
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M = Displaced clearance range comprising the upper half of the actual clearance range plus the lower half of the next larger 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 |
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