Rolling bearing
AssigneeNtn Corporation
InventorsKatsuhiro Suzuki, Eiichirou Shimazu
Life of this patent
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Abstract
A rolling bearing which can be large-sized, has corrosion resistance, and is allowed to prevent mounting accuracy from deteriorating, a fixing force from decreasing, vibration from occurring at a portion of the rolling bearing to be fixed to a bearing box or the like, and can be used for a long term even in a highly corrosive environment. A rolling bearing (1) has an inner ring (2), an outer ring (3), and rolling elements (4) as bearing members thereof. Of regions of the bearing members which are exposed to a corrosive environment, a film having a sacrificial anode action for a base material of the bearing members is formed in a region including at least a surface (c, d) of the rolling bearing (1) to be fixed. The film formed on the surface (c, d) thereof to be fixed is porous.
Claims5
A rolling bearing comprising an inner ring, an outer ring, and rolling elements as bearing members thereof,
- wherein of regions of said bearing members which are exposed to a corrosive environment, a film having a sacrificial anode action for a base material of said bearing members is formed in a region including at least a surface of said rolling bearing to be fixed to another member;
- and
- said film formed on said surface is porous;
- said base material of said bearing members consists of an iron based material;
- and
- said film having said sacrificial anode action consists of a material containing any of elements zinc, aluminum and magnesium;
- and
- said film having said sacrificial anode action is a thermal sprayed film formed by using said material as a thermal spraying material.
Dependencies are inferred from the claim text.