Page 390 - Rollingbearings

3 Angular contact ball bearings
Capped bearings Shields
• are made of sheet steel
SKF supplies the following angular contact • extend into a recess on the inner ring
ball bearings capped with a shield or seal on
both sides: Non-contact seals

• single row bearings in the 72 B(E) and • have no additional frictional moment
73 B(E) series: • have the same limiting speeds as open
– non-contact seals (designation sufix bearings
2RZ, ig. 8)
3 • most common double row basic design • form an extremely narrow gap with the
inner ring shoulder
and SKF Explorer bearings: • are made of sheet steel reinforced NBR (oil
– shields (designation sufix 2Z, ig. 9) and wear-resistant)
– contact seals (designation sufix 2RS1, • make good, positive contact with the
ig. 10) recess in which they are itted

For additional information, refer to Integral Contact seals
sealing, page 26
When capped bearings must operate • are made of NBR
under certain conditions, such as very high • are reinforced with a sheet steel insert
speeds or high temperatures, grease may • are itted in a recess on the outer ring and
appear between the inner ring and capping make good, positive contact with the
device For bearing arrangements where this recess
would be detrimental, appropriate actions • have a lip that exerts light pressure
should be taken against the recess on the inner ring to
provide an effective seal

Fig. 8 Fig. 9 Fig. 10
Capped bearing – non-contact seals Capped bearing – shields Capped bearing – contact seals

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