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FNL flanged housings are produced in two designs
depending on size. Smaller sizes up to and
including size 13 have a triangular flange ( fig);
larger sizes have a square flange.
The housings are equipped with double-lip
seals.
Relubrication facility
FNL housings are equipped with two drilled
and tapped holes for relubrication as standard,
the hole furthest from the flange should
be used when relubricating spherical roller
bearings that have a lubrication groove and
three holes in the outer ring (W33). Note
that spherical roller bearings should be
rotating when relubricating via the outer
ring. If self-aligning ball bearings or CARB
toroidal roller bearings are used, relubrication
through the outer ring is not possible.
Therefore the hole closest to the flange
should be used, to relubricate from the side
of the bearing ( fig and
 fig).
Grease guiding system
The SNL grease guiding system (fig) is
used also in FNL housings. This feature guides
the grease into the bearing when lubricating
self-aligning ball bearings or CARB toroidal
roller bearings.
Mounting aid
To simplify mounting, and make alignment
more accurate, centre lines to indicate the
housing bore axis and vertical axis are cast
into the housing flange ( fig).
Guiding and supporting the housing
As a variant the FNL housing can be supplied with a machined recess that can be used to centre the housing on an appropriate
spigot on the machine wall. As such, the attachment bolts are not subjected to shear forces. The spigot can be provided by
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machining the wall accordingly, or
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attaching an appropriate guide ring to the wall. |
Appropriate dimensions for guide rings are provided in the
table.
This variant of housing should be ordered with designation suffix P, e.g. FNL 511 BP.
Types of arrangement
FNL housings are designed to accommodate
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self-aligning ball bearings on an adapter sleeve in the 12 K and
22 K series for a shaft diameter ranging
from 20 to 100 mm |
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spherical roller bearings on an adapter sleeve in the 222 K
series for a shaft diameter ranging from
20 to 100 mm |
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CARB toroidal roller bearings on an adapter sleeve in the C 22 K
series for a shaft diameter ranging from
25 to 100 mm. |
For shaft ends, the housings are supplied
with an end cover, designation suffix A
( fig). The housings for through shafts
carry the designation suffix B ( fig).
Non-locating and locating bearing positions
The bearing seat in the housing is
designed for bearings in the non-locating
position ( fig). For bearings in the locating
position, or when a CARB toroidal roller
bearing is used in the non-locating position,
one or two locating rings should be used
between the bearing outer ring and the
housing shoulder ( fig).
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