| 摘要 |
A slide rotation body that is rotatably supported by a support shaft within a toroidal type stepless speed changer and that slides with respect to another member, wherein when the maximum shear stress depth produced during maximum deceleration of the toroidal type stepless speed changer is defined as Z0 and the size of a defect found according to the shape of the defect detected by a non-destructive testing method is defined as a square root length, no defect of 0.05 mm or above in terms of square root length is contained in the depath range of twice the maximum shear stress depth Z0 from the surface.
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