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US 6,601,993 B2Granted
Rolling bearing device
AssigneeNsk Ltd.
InventorSusumu Tanaka
Life of this patent
Estimating the term…
Abstract
In a rolling bearing 1 comprising an outer ring 2, an inner ring 3, and a plurality of rolling elements 4 rollably provided interposed between the outer ring 2 and the inner ring 3, the outer ring 2 and the inner ring 3 are formed by an austenite-based stainless steel. Further, the outer ring 2 and the inner ring 3 are subjected to plastication attaining a percent area reduction of equal or more than 25% to have a surface hardness HRC of equal or more than 35.
Claims12
A rolling bearing device comprising:
- an external member;
- an internal member;
- and
- a plurality of rolling elements rollably provided interposed between said external member and said internal member,
- wherein at least one of said external member and said internal member is formed by an austenite-based stainless steel and has a surface hardness Hv of a range of from 650 to 1,050 at a raceway groove, which rollably contacts with said plurality of rolling elements.
2 more elements
A rolling bearing device comprising:
- an external member;
- an internal member;
- and
- a plurality of rolling elements rollably provided interposed between said external member and said internal member,
- wherein at least one of said external member and said internal member is formed by an austenite-based stainless steel and has a surface hardness HRC of equal or more than 35 at a raceway groove, which rollably contacts with said plurality of rolling elements, formed by plastication that attains a percent area reduction of equal or more than 25%.
2 more elements
Dependencies are inferred from the claim text.