Suffixes for Double Row Full Complement Cylindrical Roller Bearings

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