Page 200 - SKF-bearing-housings
P. 200

Split plummer block housings SNL 30, 31 and 32 series

             Housing variants                    cation, the housings are modified to accom-
                                                 modate the special oil seals. As a result, large
             In addition to standard design SNL housings, a   SNL housings for oil lubrication are supplied
             number of variants are also available. Variants   together with the seals, as a unit.
             include housings made of different materials,
             different bearing seat tolerance classes and
             modifications for special applications.  Sealing solutions
                                                 SNL plummer (pillow) block housings in the 30,
             Housing material                    31 and 32 series are available with different
             For applications where extra strength is   standard sealing solutions († fig. 7):
             needed, SNL housings are also available in
             spheroidal graphite cast iron.      •  labyrinth seals (TS ..)
                                                 •  taconite heavy-duty seals (TNF ..)
                                                 •  seals for oil lubrication (TSD .. U)
             Bearing seat tolerance              •  end covers (ETS ..)
             SNL housings can be supplied with different
             bearing seat tolerance classes, e.g. for appli-  Table 1 provides an overview of the charac-
             cations prone to vibration, with rotating outer   teristics and suitability of each sealing solu-
             ring load or for applications operating at high   tion. Details are provided in the following text.
             temperatures.                       This information should be used as a guideline
               For additional information, contact the SKF   and does not substitute for testing a seal in its
             application engineering service.    application.

             Housings for oil lubrication
             SNL housings in the 30, 31 and 32 series can
             be used for oil lubrication at relatively high
             speeds. When they are to be used for oil lubri-

                                                                              Fig. 7
              Standard sealing solutions for large SNL plummer block housings



















                   Labyrinth seal      Taconite          Seal for oil  End cover
                      TS ..          heavy-duty seal    lubrication     ETS ..
                                        TNF ..           TSD .. U



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