Supplementary designations

The designation suffixes used to identify certain features of SKF multi-row cylindrical roller bearings are explained in the following.
A, B, C, D, EModifications to the original design. Combinations of these letters are also used, e.g. DC. The actual modification is specific to the individual bearing and is given on the drawing.
C2Radial internal clearance smaller than Normal
C3Radial internal clearance greater than Normal
C4Radial internal clearance greater than C3
HA1Inner and outer rings of case-hardened steel
HA2Outer ring of case-hardened steel
HA3Inner ring of case-hardened steel
HA4Inner and outer rings and rollers of case-hardened steel
HB1Bainite hardened inner and outer rings
HB2Bainite hardened outer ring
HB3Bainite hardened inner ring
KTapered bore, taper 1:12
K30Tapered bore, taper 1:30
MMachined brass cage
P5Dimensional and running accuracy to ISO tolerance class 5 (better than P6)
P6Dimensional and running accuracy to ISO tolerance class 6 (better than Normal)
VJ202Bearing set of double row bearings
W33Annular groove and three lubrication holes in outer ring
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