Sughrue Mion, PLLC
Rolling bearing seal or shield member
The present invention is to offer such a rolling bearing excellent in the corrosion resistance and suited to the environmental protection. This rolling bearing rotatably holds, via a retainer, a plurality of rolling elements between an inner ring having an inner ring raceway in an outer circumference and an outer ring having an outer ring raceway in an inner circumference, and is sealed with a seal or a shield member covered with a rubber, wherein a core metal of the seal or the shield member is a steel sheet that is covered with a film of 0.2 to 50 μm thickness, the film comprising a metal or an alloy having a smaller oxidation-reduction potential than that of iron, and that is formed with a film comprising an inorganic substance of lithium and silica as an uppermost layer.
NSK Ltd.
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Toshikazu Shingo Dai Hiroyuki
Yabe Higashi Kinno Ito