Фланцевые корпуса FNL

FNL flanged housings are produced in two designs depending on size. Smaller sizes up to and including size 13 have a triangular flange ;

larger sizes have a square flange.

FNL flanged housings are dimensionally interchangeable with the earlier 722500 housings.

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 and .

Grease guiding system
The SNL grease guiding system

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

.

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

machining the wall accordingly, or
attaching an appropriate guide ring to the wall.

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

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
spherical roller bearings on an adapter sleeve in the 222 K series for a shaft diameter ranging from 20 to 100 mm
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

.

The housings for through shafts carry the designation suffix B

.

Non-locating and locating bearing positions
The bearing seat in the housing is designed for bearings in the non-locating position

.

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

.