CARB® toroidal roller bearings – a revolutionary ... - Acorn Bearings

1 Product information 2 Recommendations 3 Product data
Page ............. 3 Seals Page ............. 37
Sealing the bearing
arrangement
When selecting the most suitable
sealing arrangement for a self-aligning
bearing arrangement it is necessary to
pay particular attention to
• the angular misalignment of the
shaft and
• the magnitude of the axial
displacement.
Otherwise the general selection criteria
presented in the SKF General Catalogue
(and the “SKF Interactive Engineering
Catalogue”) apply and all types
of seals can be used.
Non-contact seals are to be preferred
when the operating conditions
involve
Some seal types are supplied as
standard with SKF bearing housings
and include a double-lip contact seal,
a labyrinth seal as well as a Taconite
seal (➔ fig 21 ). Additional information
can be found in the brochure 4403
“SNL plummer block housings solve
the housing problems”.
Reference
Additional information about radial
shaft seals, V-ring seals or mechanical
seals can be found in the
SKF catalogue 4006 “CR seals” or
in the “SKF Interactive Engineering
Catalogue” on CD-ROM or online
at www.skf.com.
• high speeds,
• large axial displacements,
• high temperatures,
CR seals
and the sealing position is not directly
exposed to contamination. The shaft
should be horizontal.
The simple gap-type seal (➔ fig 17 )
is very suitable for sealing the nonlocating
arrangement of self-aligning
bearing systems. The size of the gap
can be adapted to the misalignment of
the shaft and is not limited in any way.
Single or multi-stage labyrinth seals
are obviously more efficient than the
simple gap-type seal, but are more
expensive. With CARB toroidal roller
bearings, the labyrinth passages should
be arranged axially in order to provide
freedom of axial movement for the
shaft in operation. If considerable
misalignment is expected in operation,
the passages should be angled (➔ fig
18 ). When split housings are used,
labyrinth seals with radially arranged
passages can be used, provided axial
movement of the shaft relative to the
housing is not limited (➔ fig 19 ).
Radial shaft seals are contact seals
that are suitable for sealing greased or
oil lubricated CARB toroidal roller bearings,
provided misalignment is slight
and the seal lip counterface is sufficiently
wide (➔ fig 20 ).
20