Axial Deep Groove Ball B. SKF 51218

The SKF 51218 axial deep-groove ball bearing accommodates unilateral axial forces for shaft diameters of 90 mm and guides the shaft in the axial direction.

The 51218 axial deep-groove ball bearing is designed as a separable bearing. It consists of a shaft ring, a housing ring, and the ball and cage seats. This design facilitates assembly, as the components can be fitted onto the shaft and into the housing one after the other. Manufactured from standard roller bearing steel (100Cr6), this thrust bearing is suitable for a temperature range of –30 to +150 degrees. The sheet steel cage guides the rolling elements in their raceways.

What loads can the single-direction axial deep-groove ball bearing 51218 accommodate?

The bearing is specifically designed to accommodate pure axial forces from a single direction. Due to its design, this version cannot transmit radial forces, which is why a separate radial bearing arrangement is required. As it is manufactured to standard tolerance class P0 (equivalent to PN and ABEC 1), the component is suitable for bearing arrangements in general mechanical engineering where axial loads are transmitted to the housing.

What is important to bear in mind when installing single-acting axial bearings?

As this model is not angle-adjustable, the bearing arrangement requires perpendicular contact surfaces on the shaft and housing. Otherwise, misalignment will lead to localised edge loads on the raceways, which accelerates wear. The bearing is designed without a shim; the flat housing washer rests directly against the housing shoulder. In the open design, an external housing seal protects the lubricant from dirt and moisture.