Deep Groove Ball Bearings FAG 6406 -C3

The 6406-C3 deep-groove ball bearing from FAG Wälzlager, with dimensions of 30x90x23 mm and increased bearing clearance, offers reliable running characteristics under thermal loads.

The single-row deep-groove ball bearing 6406 -C3 is designed primarily to accommodate radial loads as well as moderate axial forces. Manufactured from standard rolling-element bearing steel (100Cr6) with raceways to standard tolerance P0/PN or ABEC 1, this design is characterised by a cross-section with high load-carrying capacity. The open design, without integrated sealing washers, allows for direct lubrication via the surrounding machine system. It is a versatile standard component for enclosed gearbox and machine housings.

What is the 6406-C3 deep groove ball bearing suitable for in mechanical engineering?

Typical applications include industrial gearboxes and general machinery designs where the shaft and housing already provide effective external sealing against dirt and moisture. Thanks to the open design, lubricating oil or grease reaches the rolling elements and raceways unhindered. The sheet steel cage guides the rolling elements during continuous operation. At operating temperatures between –30 and +120 degrees Celsius, the 100Cr6 material retains its mechanical strength and dimensional stability.

What does the increased bearing clearance C3 mean during installation?

The suffix C3 indicates an increased radial bearing clearance compared with the standard version. This additional clearance between the rolling elements and raceways helps to prevent seizing should temperature differences arise between the inner ring and outer ring during operation. Tight fits on the shaft cause the inner ring to expand further, which reduces the operating clearance during operation. It is therefore advisable to check, prior to assembly, whether the thermal operating conditions and fit specifications require this increased bearing clearance.