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Sealed Bearings

Sealed Bearings

SKF self-aligning ball bearings are also available in a sealed version with contact seals at both sides - designation suffix 2RS1. These sheet steel reinforced seals are made of oil and wear-resistant acrylonitrile-butadiene rubber (NBR). The permissible operating temperature range for these seals is –40 to +100 °C and up to +120 °C for brief periods. The seal lip contacts a smooth chamfer on the inner ring with light pressure.

Sealed bearings are lubricated as standard with a grease with a lithium thickener, that has good rust inhibiting properties and other characteristics according to the table.

SKF standard grease filling for sealed self-aligning ball bearings

Technical specificationsSKF greases
MT47MT33
Bearing outside diameter (mm) ≤ 62> 62
ThickenerLithium soapLithium soap
Base oil typeMineral oilMineral oil
NLGI consistency class23
Temperature range (°C)1-30 to +110-30 to +120
Base oil viscosity (mm2/s)  
at 40 °C7098
at 100 °C7,39,4

1) For safe operating temperature, see section “Temperature range – the SKF traffic light concept”

SKF sealed self-aligning ball bearings are available with a cylindrical bore. Some sizes are also available with a tapered bore (taper 1:12).

Note

Sealed bearings are lubricated for life and require no maintenance. They should not be heated above 80 °C before mounting and should not be washed.


Deep groove ball bearings | Single row deep groove ball bearings | Basic design bearings | Sealed bearings | Bearings with shields | Bearings with low-friction seals | Bearings with contact seals | ICOS® oil sealed bearing units | Grease life | SKF Energy Efficient (E2) deep groove ball bearings | Deep groove ball bearings with filling slots | Stainless steel deep groove ball bearings | Double row deep groove ball bearings