Deep Groove Ball Bearings SKF 6244 M/C3

The SKF 6244 M/C3 deep groove ball bearing, with a 220 mm bore, brass cage and C3 clearance, provides stable guidance for heavily loaded industrial shafts.

The 6244 M/C3 deep groove ball bearing is a single-row rolling bearing designed for demanding industrial applications with shaft diameters of 220 mm. SKF manufactures this open bearing from standard roller bearing steel (100Cr6) with an outer diameter of 400 mm and a width of 65 mm. It primarily accommodates radial forces as well as axial loads in both directions. Due to its open design without integrated seals, the bearing is suitable for designs with an external lubrication supply via a housing system.

Under what operating conditions does the 6244 M/C3 deep groove ball bearing perform well?

This large bearing is typically used for shaft diameters of 220 mm subject to combined radial and axial forces. The open design allows unimpeded circulation of lubricating oil or grease within the bearing housing. At operating temperatures ranging from –20 to +150 degrees, the rolling bearing steel retains its dimensional stability. Engineers use this design when large rotating shafts need to be guided with a smooth running action and a defined bearing clearance.

What is the function of the brass cage and the C3 clearance in this bearing?

The designation ‘M’ stands for a solid brass cage which guides the rolling elements and withstands mechanical vibrations and high acceleration forces. The suffix ‘C3’ indicates an increased radial clearance compared with the standard version. This increased radial clearance compensates for thermal expansion caused by operating heat, as well as tight fits on the shaft. As a result, the bearing rotates freely and without harmful stress, even when there are temperature differences between the inner and outer rings.