Page 348 - Rollingbearings

2 Insert bearings (Y-bearings)
Multiple seals – The steel insert is held in place by a Shields
groove in the bearing outer ring and
• are recommended for very contaminated protects the seal from solid • are designed for applications where the
environments contaminants contamination level is low and additional
• consist of a standard seal and a linger – Each seal lip has a different design to friction should be avoided
2 with a vulcanized NBR lip, which seals provide superior sealing performance in • are itted in a recess on the outer ring
axially against the standard seal (ig. 22, response to different operating condi- (ig. 25, designation sufix VP076)
designation sufix 2RF) tions, including dynamic misalignment • do not make contact with the inner ring,
• have the space between the linger lip and – The outermost and innermost lips act as but form a narrow gap
the inner ring shoulder illed with grease a labyrinth to prevent contaminant • are made of sheet steel
to provide additional protection ingress and grease leakage, • are only available for insert bearings on
• are only available for bearings with an respectively request
inner ring extended on both sides – The three inner lips make constant
contact with the inner ring shoulder Bearings with shields should not be used
• are only available for bearings with an where water, steam or moisture can enter
5-lip seals inner ring extended on both sides the bearing

• are recommended for extremely contamin-
ated environments, such as agricultural RS1 seals
applications
• are patented by SKF • were originally developed for standard
• consist of a sheet steel insert with a SKF deep groove ball bearings
vulcanized 5-lip contact seal made of a • are itted in a recess on the outer ring and
low-friction NBR compound (ig. 23): ride against the inner ring shoulder to act
as contact seals (ig. 24, designation sufix
2RS1)
• are made of sheet steel reinforced NBR

Fig. 22 Fig. 23 Fig. 24
Multiple seals 5-lip seals RS1 seals

Fig. 25 Fig. 26 Fig. 27
Shields Snap-type, glass ibre reinforced PA66 Rubber seating rings in the RIS 2 series
cage

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