Deep Groove Ball Bearings SKF 6218 -Z

The SKF 6218-Z deep groove ball bearing, with dimensions of 90 x 160 x 30 mm, is designed to accommodate radial and axial loads in mechanical engineering applications.

The 6218-Z deep groove ball bearing is a single-row radial ball bearing made from standard 100Cr6 bearing steel. It primarily supports radial forces and can guide shafts axially in both directions. The SKF version features a standard radial clearance and tolerance class P0/PN (corresponding to ABEC 1). A sheet steel cage keeps the rolling elements spaced apart and helps to ensure even load distribution during operation.

What is the 6218-Z deep groove ball bearing suitable for in operation?

Design engineers primarily use this rolling bearing for medium to high loads, as well as in combined load conditions. Thanks to the combination of a 90 mm bore and a 160 mm outer diameter, the component can withstand considerable radial forces. As the design is rated for a temperature range of –20 to +150 degrees, it is also suitable for demanding thermal operating conditions. The cylindrical outer ring, which has no flange or groove, fits precisely into appropriately machined housing bores.

What is the function of the single-sided Z cover plate?

The suffix ‘Z’ denotes a non-contacting cover plate made of sheet steel on one side of the bearing. This protects the raceways from coarse dirt particles, but does not generate any additional frictional resistance during operation. The opposite, open side allows for relubrication or the passage of lubricants from inside the housing. During assembly, the side with the metal cover should be oriented towards the side where contamination is likely to occur.