Datasheet

Fig. 3
Fig. 4
Z Z Z ZS
RS1 RS1
a b c d
a b
Bearing data – designs
SKF stainless steel deep groove ball bear-
ings are available for shaft diameters from
0,6 to 50 mm. Other sizes may also be
available, please contact the SKF application
engineering service. Also, a range of inch
series bearings is available.
Sealing solutions
Shields
Shields identified by the designation suffix Z
typically have an extension in the shield bore
to form a long, narrow gap with the land of
the inner ring shoulder. Bearings fitted with
shields are primarily intended for applica-
tions where the inner ring rotates and both
high temperatures and high speeds apply
(† fig. 3a). A grease other than that pro-
vided may be needed. Some shields do not
have the extension († fig. 3b). The bore of
a Z shield on some stainless steel bearings
can extend into a recess on the inner ring
(† fig. 3c). Shields identified by the desig-
nation suffix ZS are fixed in the outer ring
by a retaining ring († fig. 3d) and may
extend into a recess on the inner ring. For
stainless steel bearings, shields made of
polytetrafluoro ethylene (PTFE) may be
available. For additional information, contact
the SKF application engineering service.
Contact seals
Contact seals, which are fitted in a recess on
the outer ring, make good, positive contact
with the recess, without deforming the outer
ring. Theses seals are made of an oil and
wear resistant acrylonitrile-butadiene rubber
(NBR) and are reinforced with a sheet steel
insert. SKF stainless steel bearings are
equipped with RS1 seals to design (a) or (b)
(† fig. 4). The exact seal design may differ
from the illustrations.
Non-contact seals
Some sizes of SKF stainless steel deep groove
ball bearings with non-contact seals are
available on request. Low-friction seals,
made of polytetrafluoroethylene (PTFE),
are also available for some sizes.
Other seal types or materials may also be
available, please contact the SKF application
engineering service.
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