Deep Groove Ball Bearings FAG 6321 -C3

The FAG 6321-C3 deep-groove ball bearing, measuring 105 x 225 x 49 mm and featuring increased bearing clearance, offers reliable running characteristics under demanding thermal conditions.

The FAG 6321-C3 deep groove ball bearing is a single-row rolling bearing designed primarily for radial loads. With a bore of 105 mm, an outside diameter of 225 mm and a width of 49 mm, this design is suitable for heavy-duty shafts and drives. Manufactured from standard roller bearing steel (100Cr6) with a conventional sheet steel cage, the bearing also accommodates moderate axial forces in both directions. As an open variant, it can be flexibly integrated into existing lubrication systems.

In which applications is the 6321-C3 deep groove ball bearing used?

The 6321-C3 deep groove ball bearing is primarily used in industrial machinery and gearbox construction, where bearing housings are designed for shafts with a diameter of 105 mm. Due to its open design, the bearing is designed for external lubrication via oil or grease within the housing. Typical applications include larger electric motors, gearboxes and industrial plant subject to high mechanical stress. Thanks to its temperature range of –30 to +150 degrees, the component is suitable for a wide range of operating conditions.

What characterises the C3 bearing clearance in the 6321-C3?

The C3 designation indicates a slightly increased radial bearing clearance compared with the standard. This increased operating clearance compensates for dimensional changes that may occur between the inner and outer rings as a result of heating. The C3 clearance also reduces the risk of the rolling elements becoming jammed when tight fits cause the inner ring to expand. In combination with tolerance class P0/PN or ABEC 1 and the dimensionally stable sheet steel cage, this model is suitable for systems with significant temperature differences during continuous operation.