Page 170 - SKF-bearing-housings

Split plummer block housings SNLN 30 series

Special seals Fig. 9
Taconite heavy-duty seals with an axial labyrinth
In addition to the standard seal assortment,
SNLN 30 housings are available, on request,
with high-temperature seals, taconite heavy-
duty seals with an axial labyrinth or custom
seals for special applications.

High-temperature seals
For high operating temperatures, up to 250 °C
(480 °F), high-temperature felt seals should
be used. The felt seals can accomodate cir-
cumferential speeds up to 2 m/s. They are
identified by the designation suffix CB, e.g.
TSN 3024 CB.

Taconite heavy-duty seals with an axial
labyrinth
TSN.. NC TSN.. NB
Taconite heavy-duty seals with an axial laby-
rinth (TSN .. NC or TSN .. NB, † fig. 9) can be
used under the same conditions as taconite
seals with a radial labyrinth. The seals are
greased via a hole in the housing cap. There- Table 5
fore, they can only be used with housings with Taconite heavy-duty seals with an axial labyrinth
the suffix T (at the end of a shaft) or the suffix Seal
TD (for through shafts).
TSN .. NB seals have a V-ring. It limits the Designation TSN .. NC TSN .. NB
3024 to 3032
Size range
3024 to 3032
axial movement of the shaft relative to the
housing to ±1,5 mm. Application conditions and requirements
Specifications for the seals are listed in
table 5. Temperature [°C] –40 to +250 –40 to +100
Temperature [°F] –40 to +480 –40 to +210
Max. circumferential not limited 12
speed 1) [m/s]
Max. misalignment [°] 0,5 0,5
Max. axial shaft ±2,5 ±1,5
displacement from
a central position [mm]
Shaft tolerance class h9 V E h9 V E

1) To convert circumferential speeds to rotational speeds,
refer to table 7 on page 37.

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