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Internal Design Suffixes
CV Modified internal design, full complement roller set
External design Suffixes
ADB
Modified internal design and seal (for NNF 50 series)
B Improved seal and grease
DA Modified internal design and seal (for 3194.. series)
-2LS Contact seal, PUR, on both sides
Cage design Suffixes
V Full complement of rollers (no cage)
Materials, heat treatment Suffixes
HB1
Bainite-hardened inner and outer rings
L4B Bearing rings and rollers black oxidized
Accuracy, clearance, preload, quiet running Suffixes
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 = 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
Bearing sets, matched bearings Suffixes
DR Set of two matched bearings
TR Set of three matched bearings
QR Set of four matched bearings
