Deep Groove Ball Bearings SKF 626 -2Z

The SKF 626-2Z deep groove ball bearing features compact dimensions of 6 × 19 × 6 mm and non-contacting cover plates for low-friction radial guidance.

The 626-2Z deep groove ball bearing is a single-row radial ball bearing from SKF in the Explorer series. With a bore of 6 mm, an outside diameter of 19 mm and a width of 6 mm, the component requires only minimal radial and axial installation space. Manufactured from standard roller bearing steel 100Cr6, this roller bearing primarily accommodates radial loads. Thanks to its standard radial clearance and factory tolerance class P0/PN, the bearing is suitable for standardised fits in general mechanical engineering and repair applications.

In which applications is the 626-2Z deep groove ball bearing used?

This miniature bearing is designed for applications with shaft diameters of 6 mm, where compact dimensions and low rotational resistance are required. Typical applications include precision mechanical devices, small drive units and measuring instruments. As the inner and outer rings, as well as the rolling elements, are made from standard rolling-bearing steel, the component can withstand radial loads within a temperature range of –20 to +120 degrees. The design, which has no groove or flange on the outer ring, allows for flush mounting in cylindrical housings.

What are the distinctive features of the cover plates in the 626-2Z design?

The suffix -2Z denotes cover plates made from pressed sheet steel fitted on both sides. These shields form a fine, non-contacting gap to the inner ring and shield the rolling elements from solid particles. As there is no elastic sealing lip in contact with the rotating ring, no additional frictional heat is generated, thereby allowing high rotational speeds. The guided sheet steel cage ensures that the balls are evenly spaced. Whilst the gap seals do not provide hermetic protection against liquid media such as splash water, they do effectively keep out mechanical contaminants.