Deep Groove Ball Bearings FAG 6309 -Z-C3

The FAG 6309 -Z-C3 deep groove ball bearing, measuring 45 x 100 x 25 mm, with a single-sided sheet metal cover and C3 clearance, provides reliable guidance for rotating shafts.

The 6309 -Z-C3 deep groove ball bearing is a single-row rolling bearing manufactured by FAG Wälzlager from standard rolling bearing steel (100Cr6). The design primarily absorbs radial forces, but also guides the shaft under axial loads in both directions. Thanks to the cylindrical outer ring without a flange or groove, the component fits precisely into housing bores. A sheet steel cage maintains a uniform spacing between the rolling elements.

In which applications is the 6309 -Z-C3 deep-groove ball bearing used?

Design engineers and maintenance personnel prefer to use this bearing type in bearing arrangements where frictional heat is generated during operation or where thermal expansion occurs. Typical applications are found where radial loads are combined with moderate axial forces and single-side sealing is required. The single-sided sheet metal cover leaves the open side accessible for lubricant supply from inside the housing. At the same time, the cover plate protects the raceway from foreign particles from the outside.

What do the designations Z and C3 mean in terms of operation?

The suffix ‘Z’ denotes a single-sided, non-contacting cover plate made of sheet steel. Unlike sliding seals, this cover plate does not generate any additional frictional torque, which means the bearing remains thermally unburdened even at higher speeds. The designation C3 indicates an increased radial bearing clearance compared with the standard version. This reserve helps to prevent the bearing from becoming stressed due to operational heating or tight fits. The bearings are manufactured to tolerance class P0 (ABEC 1).