Deep groove ball bearings
Closed designs

The deep groove ball bearings manufactured by RKB are also available in closed designs, with seals or shields. The seals, which are normally made of acrylonitrile-butadiene rubber (NRB) with a metallic reinforcement, are retained in their correct position by a recess in the outer ring. The working temperature range is from -40 to 100 °C, with a peak of 120 °C for short periods of time.