Deep Groove Ball Bearings FAG 6309 -RSR-C3

The 6309 -RSR-C3 deep-groove ball bearing from FAG Rolling Bearings, with dimensions of 45x100x25 mm, a single-sided RSR seal and increased C3 bearing clearance, ensures reliable operation under radial loads.

The 6309 -RSR-C3 is a single-row radial ball bearing made from standard rolling-element steel (100Cr6) with a bore of 45 mm, an outside diameter of 100 mm and a width of 25 mm. It primarily absorbs radial forces, but also guides shafts reliably in the axial direction. A sturdy sheet steel cage guides the rolling elements evenly into the deep raceways of the inner and outer rings. The design complies with the standard tolerance class P0/PN (ABEC 1) and features a cylindrical outer ring without a flange or groove.

What is the 6309 -RSR-C3 deep-groove ball bearing suitable for in operation?

Design engineers use this rolling bearing when one side of the housing needs to be protected from dirt, whilst the open side allows for lubricant exchange within the gearbox or machine interior. The single-sided sealing ring keeps out coarse particles and splash water from the outside. Thanks to the increased C3 bearing clearance, smooth running is maintained even when operational heating or tight fits cause radial expansion of the bearing rings. The component is suitable for a temperature range of -30 to +100 degrees Celsius.

What are the key features of the combination of the RSR seal and C3 bearing clearance?

The designation RSR stands for a single-sided, sliding contact seal. It specifically protects the interior of the bearing from one end face, but generates some friction at the sealing lip. Unlike units that are sealed on both sides, the bearing can be supplied with oil or grease from the system via the open side. The additional designation C3 indicates a slightly increased radial bearing clearance as supplied. This helps to prevent the rolling elements from seizing up should the inner and outer rings reach different temperatures during operation.