Sealed four-row cylindrical roller bearings
SKF four-row cylindrical roller bearings can also be supplied as sealed bearings, with a seal at one side or at both sides of the bearing. The seals are double lip radial shaft seals. Compared with open bearings, sealed bearings offer the following advantages:
- Longer service life.
- Reduced grease consumption.
- Longer relubrication intervals.
- Grease leakage and contamination of the rolling emulsion are prevented.
Thus the sealed bearings satisfy modern economic and ecological demands.
The radial shaft seals are made of hydrogenated acrylonitrile butadiene rubber (HNBR) with pressed steel reinforcement and have a steel garter spring to provide the necessary pressure for the seal lip on the counterface. The permissible sliding speed is 25 m/s. The seals have high thermal and chemical resistance and can be operated in the temperature range –20 to +140 °C.