Cookies on the SKF website

We use cookies to ensure that we give you the best experience on our websites and web applications. By continuing without changing your browser settings, we assume you give your consent to receive cookies. However, you can change your browser cookie setting at any time.

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.

Designs

SKF sealed four-row cylindrical roller bearings are produced with cylindrical bore; two designs are available.

BC4.22 design

Two outer rings with integral central flange, one intermediate ring and two loose flange rings fitted with a double-lip radial shaft seal. Two inner rings with one integral flange. Four pressed steel window-type cages. With annular grooves and lubrication holes in outer ring (fig 1).

BC4.23 design

Two outer rings with integral central flange, one intermediate ring and two loose flange rings, one fitted with a double-lip radial shaft seal. Two inner rings with one integral flange. Four pressed steel window-type cages. With annular grooves and lubrication holes in outer ring (fig 2).
SKF logo