Rolling device
AssigneeNsk Ltd.
InventorsToyohisa Yamamoto, Norifumi Ikeda, Kouichi Yamamoto
Life of this patent
Estimating the term…
Abstract
A guide rail 13 is formed of a ceramic material having a specific strength of 2×107 mm or more and has a planar part with a surface roughness of 0.5 μmRa or less. Further, the guide rail 13 has a recess 18 for avoiding interference with a part to be attached in which the corner 18a of the recess 18 is formed with a radius of curvature of 0.1 mm or more.
Claims30
A rolling device comprising a movable member capable of rotation or capable of linear motion, a support for supporting the movable member and a plurality of rolling elements disposed rotationally between the movable member and the support, in which at least one of the movable member, the support and the rolling element is formed of one of materials of ceramic materials, cermets and cemented carbides and the material has a ratio of the bending strength and the density of 1.2×107 mm or more.
Dependencies are inferred from the claim text.