Designation system

In addition to their designation, double row tapered roller bearings are also identified by their design variants/features (→ product tables TDO and TDI designs). Some of these features may not be part of the bearing designation, but are always part of the design variants/features (→ Designs and variants).
Examples and the applicable options for double row tapered roller bearings are given below.
Basic bearing designation system
Examples
BT2B 331840 G/HA1C150whereBT2B 331840 =
G =
HA1 =
C150 =
BT2B 334113/HA3VA901whereBT2B 334113 =
HA3 =
VA901 =
BT2-8164/HA4
whereBT2-8164 =
HA4 =
331775 B
where331775 =
B =


Applicable options for double row tapered roller bearings


  Prefixes (n.a.)


Basic designation (drawing number)
BT2-
BT2B
Drawing number prefixes that may precede a four- or six-digit drawing number


Suffixes - Internal design
A, B, C, D
Deviating or modified internal design, combinations are possible


Suffixes - External design (helical groove, etc.)
E
SKF Explorer bearing
G
Helical groove in the inner ring bore
For additional information about design variants/features → Designs and variants


Suffixes - Cage design
TN9
Glass fibre reinforced PA66 cage
For additional information about design variants/features → Designs and variants


Suffixes - Materials, heat treatment
HA1Case-hardened inner and outer rings
HA2Case-hardened outer ring
HA3Case-hardened inner ring
HA4Case-hardened inner and outer rings and rollers
HA5Case-hardened rollers
HA6Case-hardened outer ring(s) and rollers
HA7Case-hardened inner ring(s) and rollers
HB1Bainite-hardened inner and outer rings
HB2Bainite-hardened outer ring(s)
HB3Bainite-hardened inner ring(s)

 Suffixes - Internal clearance
C...
Axial internal clearance; the three- or four-digit number immediately following the C is the mean axial internal clearance in µm
(for clearance values not listed in the product tables, contact SKF)


Suffixes - Bearing sets, matched bearings (n.a.)


Suffixes - Stabilization (n.a.)


Suffixes - Lubrication (n.a.)


Suffixes - Other variants
PEX
SKF Explorer bearing, used only when same-sized basic design bearing and SKF Explorer bearing are available
VA901
FKM contact seal on both sides, outer ring side faces with lubrication grooves, sealing ring between the inner rings
VA902
FKM contact seal on both sides, without relubrication features, sealing ring between the inner rings
VA903
FKM contact seal on both sides, outer ring side faces with lubrication grooves, without sealing ring between the inner rings
VA919
FKM contact seal on both sides, relubrication features in the outer rings, annular groove in the bore and lubrication holes in the inner ring guide flanges
VA941
FKM contact seal on both sides, inner ring inner side faces with lubrication grooves, inner rings with annular grooves in the bore and lubrication holes in their outer shoulders
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