Deep Groove Ball Bearings SKF 6004 /C3

The SKF 6004/C3 deep groove ball bearing, with a 20 mm bore, C3 clearance and an open design, offers a wide range of applications at higher speeds.

The 6004/C3 deep groove ball bearing is a single-row rolling bearing in SKF’s Explorer series. With compact main dimensions of 20 mm inside diameter, 42 mm outside diameter and 12 mm width, it primarily accommodates radial forces as well as moderate axial loads. Manufactured from standard 100Cr6 rolling-element bearing steel and fitted with a robust sheet steel cage, this design is suitable for a wide range of industrial applications. The component is suitable for operating temperatures ranging from –20 to +150 degrees.

In which applications is the 6004/C3 deep-groove ball bearing used?

This roller bearing is primarily used in rotating systems where low-friction operation and thermal reserves are required. Typical applications include bearings subject to continuous rotational movement and shaft systems with an external lubricant supply. As this is an open bearing without integrated sealing washers, the installation location requires a housing seal to prevent the ingress of contaminants. At the same time, this open design allows for a direct supply of lubricant – oil or grease – from the surrounding system.

What is the purpose of C3 bearing clearance and tolerance class P6/P5?

The suffixes denote functional characteristics for demanding installation situations. The designation C3 stands for a slightly increased radial bearing clearance. This increased clearance between the rolling elements and raceways compensates for thermal expansion at operating temperature or fit constrictions caused by rigid shaft seats. Furthermore, the bearing is characterised by enhanced precision: dimensional accuracy corresponds to class P6, whilst running accuracy complies with class P5. As a result, the shaft runs more smoothly with reduced runout deviation.