Deep Groove Ball Bearings FAG 6303 -Z-C3

The FAG 6303 -Z-C3 deep groove ball bearing, measuring 17x47x14 mm, with a single-sided sheet metal cover and C3 clearance, offers a reliable solution for rotating shafts.

The 6303 -Z-C3 deep groove ball bearing is a single-row radial ball bearing made from standard 100Cr6 rolling-element steel with a cylindrical bore. The design primarily accommodates radial forces and is also suitable for moderate axial forces in both directions. Fitted with a sheet steel cage and manufactured to standard tolerance P0, this FAG design combines standardised industrial features with specific running characteristics for demanding operating conditions.

What is the 6303 -Z-C3 deep groove ball bearing suitable for in operation?

Typical applications include industrial drive units, rotating machinery and general machine designs with a 17 mm shaft diameter. The single-sided cover plate protects the interior of the bearing from coarse foreign particles on the covered side, whilst the open opposite side allows direct access of lubricant from inside the housing. This is particularly recommended for oil-lubricated systems or installations with central relubrication, where conventional seals closed on both sides would impede the flow of lubricant.

What are the functions of the C3 bearing clearance and the Z cover plate?

The suffix C3 indicates a slightly increased radial bearing clearance compared with the standard version. This reserve compensates for thermal expansion at higher operating temperatures or constrictions caused by tight fits on the shaft and housing, ensuring that the rolling elements do not become jammed. The Z-cover, made from profiled sheet metal, operates without contact, causes no additional frictional torque and thus supports low-friction rotational movement at standardised speeds.