Deep Groove Ball Bearings SKF 6303 -2Z

The SKF 6303-2Z deep-groove ball bearing, with main dimensions of 17 × 47 × 14 mm, provides a compact bearing solution for both radial and axial loads.

This single-row deep-groove ball bearing 6303-2Z belongs to the SKF Explorer performance class and is made from standard roller bearing steel (100Cr6). As a versatile rolling bearing, the design primarily absorbs radial forces, but also supports axial forces in both directions thanks to the deep raceways in the inner and outer rings. The sheet metal shields fitted on both sides protect the interior from coarse dirt particles, whilst a sturdy sheet steel cage precisely maintains the spacing between the rolling elements.

What are the key operating characteristics of the 6303-2Z deep-groove ball bearing?

The bearing is designed to support shafts with a diameter of 17 mm under radial and moderate axial loads. As the cylindrical outer ring has no flange or ring groove, the component fits flush into smooth housing bores. This design is suitable for dry environments where mechanical protection against the ingress of solid particles is required and low-friction operation is a priority.

What are the benefits of the cover plates in the -2Z design?

The suffix -2Z denotes two non-contact gap seals made from profiled sheet steel. Unlike abiding seals, these sheet metal discs do not generate any additional frictional heat, thereby maintaining the speed limits. In combination with the standard radial bearing clearance and tolerance class P0 (ABEC 1), the assembly operates with low vibration. At operating temperatures between –20 and +120 degrees, the component meets standard industrial application requirements.