Deep Groove Ball Bearings FAG 6221

The FAG 6221 single-row deep groove ball bearing, with dimensions of 105 × 190 × 36 mm, is a rolling bearing designed for industrial applications.

The FAG 6221 single-row deep-groove ball bearing accommodates radial loads as well as axial loads in both directions. Manufactured from standard roller bearing steel 100Cr6, this open roller bearing complies with tolerance class P0/PN (ABEC 1). Due to its open design, without a flange or integrated seals, the lubricant can be flexibly adapted to the specific operating environment. With a bore of 105 mm, an outer diameter of 190 mm and a width of 36 mm, this version is designed for direct mounting on suitable cylindrical shafts.

What are the key features of the 6221 deep-groove ball bearing?

This rolling bearing is primarily suitable for industrial applications involving combined loads and continuous rotational movement. The guided sheet steel cage ensures that the rolling elements are kept at a uniform distance apart. As the bearing is designed for a temperature range of -20 to +150 degrees, it can withstand demanding thermal conditions during continuous operation. Experts prefer to use the open design in enclosed spaces with centralised oil or grease lubrication, where friction losses caused by rubbing seals must be avoided.

What installation and operating conditions apply to the open design?

As the 6221 deep-groove ball bearing is designed without integrated sealing elements, the surrounding structure must prevent the ingress of dirt particles or moisture. The normal radial bearing clearance provides a balanced operating clearance between the rolling elements and raceways for standard fits. The lubrication scheme should be selected to suit the operating speeds and thermal conditions in order to continuously protect the running surfaces, made of standard rolling-element bearing steel, from friction during operation.