Deep Groove Ball Bearings SKF 629 /C3

The SKF 629/C3 deep groove ball bearing is a compact, open rolling bearing measuring 9 × 26 × 8 mm and featuring increased radial clearance.

The single-row deep groove ball bearing 629/C3 is designed primarily to support radial loads as well as moderate axial forces in both directions. Thanks to its open design without integrated sealing washers, the bearing operates with minimal rolling resistance and is suitable for assemblies where lubrication is supplied via an external lubrication system. The inner and outer rings, as well as the rolling elements, are made from standard roller bearing steel 100Cr6. A sturdy sheet steel cage keeps the balls evenly spaced and prevents direct contact between adjacent rolling elements during rotation.

In which applications does the 629/C3 deep-groove ball bearing prove its worth?

Compact bearing arrangements operating at high speeds constitute the primary area of application for this design. As lubricating oil or grease can reach the raceways directly and unhindered, only minimal friction losses occur during operation. The open design requires a clean housing environment that is protected from contamination. With a permissible temperature range of –20 to +150 degrees, the rolling bearing is designed to be thermally stable, provided that the lubricant used is approved for the respective ambient temperatures.

What is the function of the increased radial clearance C3?

The C3 designation indicates a slightly increased radial clearance compared with the standard CN version. If temperature gradients occur between the inner and outer rings during operation, or if tight press fits are selected on the shaft and housing, the internal radial clearance decreases. The C3 bearing clearance accommodates these thermal and elastic dimensional changes and effectively prevents the rolling elements from jamming. Manufactured to the standard tolerance class P0 or ABEC 1, the bearing offers defined running characteristics for industrial applications.