Rolling bearing and production process therefor
AssigneeNsk Ltd.
InventorsTomohiro Motoda, Hideyuki Uyama
Life of this patent
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Abstract
A rolling bearing has an outer diameter surface of the outer ring which is a fitting surface with a housing and the inner diameter surface of the inner ring, which is a fitting surface with a shaft. The outer diameter surface of the outer ring or the inner diameter surface of the inner ring is coated with a bonded film containing an organic binder, a solid lubricant powder such as molybdenum disulfide powder, and a friction/wear modifier such as antimony oxide powder. According to the rolling bearing, a creep resistance is kept excellent without causing increase in cost and size and being deformed and softened.
Claims6
A rolling bearing including an outer ring, an inner ring, and a rolling element rollably arranged between the outer ring and the inner ring,
- wherein an outer diameter surface of the outer ring is configured to be fitted to a first member, an inner diameter surface of the inner ring is configured to be fitted to a second member, and the first member and the second member are rotatable relative to one another,
- wherein at least one of the outer diameter surface of the outer ring and the inner diameter surface of the inner ring has a bonded film containing an organic binder comprising a base material, a curing agent, a solid lubricant powder, and a friction/wear modifier, and
- wherein in a section of the bonded film, the friction/wear modifier having a cross-sectional area of 1 μm2 or larger occupies an area ratio of 2.5% or greater.
A method of manufacturing a rolling bearing including an outer ring, an inner ring, and a rolling element rollably arranged between the outer ring and the inner ring,
- wherein an outer diameter surface of the outer ring is configured to be fitted to a first member, an inner diameter surface of the inner ring is configured to be fitted to a second member, and the first member and the second member are rotatable relative to one another,
- wherein the method comprises:
- applying a coating solution including an organic binder comprising a base material and a curing agent, a solid lubricant powder, and a friction/wear modifier to at least one of the outer diameter surface of the outer ring and the inner diameter surface of the inner ring, and
- thermal curing the coating solution, and
- wherein in a section of the bonded film, the friction/wear modifier having a cross-sectional area of 1 μm2 or larger occupies an area ratio of 2.5% or greater.
Dependencies are inferred from the claim text.