Roller bearing
AssigneeKoyo Seiko Co., Ltd.
InventorsHiroki Matsuyama, Akiyuki Suzuki, Yasunari Abo
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Abstract
The present invention provides a roller bearing in which a plurality of rollers is interposed between an inner ring member and an outer ring member, and a flange having a guide surface for guiding an end surface of the roller in a sliding contact manner is provided at an end portion of at least one of the inner ring member and outer ring member in an axial direction. Three-dimensional surface roughness of the end surface of the roller is defined to a value which satisfies conditional expressions of Sa≦0.1 μm and 0.15 μm≦Svk≦0.30 μm, where Sa is arithmetical average roughness based on rough curve and Svk is reduced valley depth based on the rough curve.
Claims6
A roller bearing comprising:
- an inner ring member;
- an outer ring member which is concentric with radially outside of the inner ring member;
- and
- a plurality of rollers interposed between the inner ring member and the outer ring member, wherein a flange having a guide surface for guiding an end surface of the roller in a sliding contact is provided at one of the inner ring member and outer ring member at least, and three-dimensional surface roughness of at least one of the end surface of the roller and the guide surface of the flange is defined to a value which satisfies conditional expressions of Sa 0.1 and 0.15 μm≦Svk≦0.30 m, where Sa is arithmetical average roughness based on roughness curve and Svk is reduced valley depth based on the Abbott-firestone curve (bearing curve).
Dependencies are inferred from the claim text.