Deep Groove Ball Bearings SKF 6218 -2Z/C3

The SKF deep groove ball bearing 6218 -2Z/C3 (90x160x30 mm) features sheet metal shields on both sides and an increased C3 bearing clearance, making it suitable for industrial drives subject to thermal stress.

The 6218 -2Z/C3 deep groove ball bearing is a single-row radial ball bearing from SKF designed to accommodate radial and moderate axial loads in both directions. With key dimensions of a 90 mm bore, 160 mm outside diameter and 30 mm width, this design is suitable for medium to heavy-duty shaft mountings. The design, made from standard 100Cr6 rolling-element bearing steel with a sheet steel cage, is characterised by high dimensional stability and smooth running during continuous industrial operation.

What is the 6218-2Z/C3 deep groove ball bearing suitable for?

Design engineers and maintenance technicians primarily use this bearing size in rotating industrial drives and mechanical assemblies subject to continuous loads. As deep-groove ball bearings of this design allow high speeds whilst maintaining stable guidance, they are used in a wide range of applications within mechanical drive trains. Thanks to the cylindrical outer ring without a flange or groove, the component can be fitted directly into standardised housing bores.

What advantages do cover plates and C3 bearing clearance offer in this design?

The cover plates on both sides, indicated by the designation 2Z, protect the bearing interior from coarse dirt particles without causing additional friction or wear on the sealing lip. The bearing is designed for operating temperatures ranging from -20 to +120 degrees. The slightly increased C3 radial bearing clearance serves to compensate for temperature-induced expansion of the shaft or tight fits, ensuring that the rolling elements do not become stressed even when the bearing is operating at high temperatures.