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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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