Deep Groove Ball Bearings SKF 6218

The SKF deep groove ball bearing 6218, with main dimensions of 90 × 160 × 30 mm, accommodates combined radial and axial loads in rotating shaft assemblies.

The 6218 deep groove ball bearing is a single-row radial ball bearing from SKF’s Explorer performance class. Its open design primarily accommodates radial forces and supports shafts even when subjected to axial loads acting from both ends. Manufactured from roller bearing steel (100Cr6), with the inner ring, outer ring and rolling elements made from the same material, the component is suitable for operating temperatures ranging from –20 to +120 degrees Celsius. The cylindrical outer ring has no flange or ring groove.

What loads and mounting conditions does the 6218 deep groove ball bearing accommodate?

This rolling bearing is used wherever shafts with a diameter of 90 mm need to be supported. It is utilised in designs involving combined loads in rotating machine shafts. The geometry of the deep raceways enables smooth running at moderate to higher speeds. As the component absorbs axial forces in both directions, it is frequently used as a fixed or floating bearing in enclosed housings.

What are the key features of the open design of the 6218?

As the 6218 deep-groove ball bearing is designed as an open bearing, it has no integrated seals or cover plates. The lubricant, usually oil or grease, is supplied via the housing system. Furthermore, this design requires a clean installation environment and external sealing elements on the housing covers to keep out contaminants. The standard radial bearing clearance, combined with tolerance class P0 (ABEC 1) and the sheet steel cage, facilitates the design of suitable shaft and housing seats.