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Supplementary designations

The designation prefixes and suffixes used to identify SKF four-row tapered roller bearings are explained in the following.
Bearings to the SKF Explorer class specifications are identified by the suffix E and have inner and outer rings of case hardened steel as standard. The helical groove in the bore is also standard. Therefore, the relevant suffixes (HA1 and G) are not used for these bearings.
A, B, Cor combinations of these letters: modified internal design
ESKF Explorer bearing without spacer rings
EXSKF Explorer bearing with spacer rings
E(X)1SKF Explorer bearings with seals of hydrogenated acrylonitrile butadiene rubber (HNBR), otherwise to VA901 specification
E(X)2SKF Explorer bearings with seals of hydrogenated acrylonitrile butadiene rubber (HNBR), otherwise to VA902 specification
E(X)3SKF Explorer bearings with seals of hydrogenated acrylonitrile butadiene rubber (HNBR), otherwise to VA903 specification
Ghelical groove in bearing bore
HA1outer and inner rings of case hardened steel
HA4outer and inner rings and rollers of case hardened steel
HE1outer and inner rings of vacuum remelted steel
C…combined with a number, designates the mean value of the axial clearance in µm
VA901fluoro rubber (FKM) seals at both sides, sealing ring between inner rings, can be relubricated via outer ring
VA902fluoro rubber (FKM) seals at both sides, sealing ring between inner rings, cannot be relubricated
VA903as VA901 but without sealing ring between inner rings
VA919fluoro rubber (FKM) seals at both sides, can be relubricated via outer ring, inner rings without lubrication grooves in side faces, but with annular groove in bore and lubrication holes through guide flange
VA941fluoro rubber (FKM) seals at both sides, cannot be relubricated via outer ring, inner ring with lubrication grooves in inboard side faces and annular groove and lubrication holes at outboard side between inner rings
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