Bearings with shields are primarily intended for applications where the inner ring rotates. Shields are fitted in the outer ring and do not make contact with the inner ring, but form a narrow gap with it. Shields are made of stainless steel.
Depending on the bearing design, series and size, SKF supplies shields in different designs.
Shields identified by the designation suffix Z typically have an extension in the shield bore (fig. 1) to form a long, narrow gap with the inner ring shoulder. Some shields do not have the extension (fig. 2) or the shield bore can extend into a recess on the inner ring (fig. 3).
Shields identified by the designation suffix ZS are fixed in the outer ring by a retaining ring (fig. 4) and may extend into a recess on the inner ring.
For stainless steel bearings, shields made of PTFE may be available. For additional information, contact the SKF application engineering service.