Deep Groove Ball Bearings SKF 6018 -Z

The SKF 6018-Z deep groove ball bearing, with dimensions of 90x140x24 mm, features a single-sided sheet metal cover for protected shaft mountings in mechanical engineering.

The 6018-Z deep groove ball bearing is a single-row rolling bearing made from standard bearing steel (100Cr6) in the SKF Explorer design. The bearing primarily accommodates radial loads as well as moderate axial forces in both directions. Thanks to its standard radial clearance, the bearing is suitable for standard operating conditions without excessive thermal expansion. The integrated steel sheet cage guides the rolling elements at operating temperatures ranging from –20 to +150 degrees Celsius.

In which applications does the 6018-Z deep groove ball bearing prove its worth?

This rolling bearing is used in industrial drives and rotating shaft assemblies where medium speeds and combined radial and axial loads occur. As the bearing has tolerance class P6 for dimensional accuracy and PN for running accuracy, it ensures smooth running even with tight fits. The outer ring has no flange or groove. This allows for flush mounting in cylindrical housing bores where a bearing is required for shafts with a 90 mm bore.

What is the function of the single-sided Z-cover on this bearing?

The designation ‘-Z’ stands for a non-contacting cover plate made of sheet steel on one side of the bearing. This cover protects the interior of the bearing from coarse dirt particles, but does not generate any additional friction or heat compared to sliding seals. The opposite side remains open. This allows the bearing to be supplied directly with lubricant via the interior of a housing, whilst the closed side faces outwards.