| 摘要 |
<p>A mechanical part having a rolling contact surface (11a) with many isolated minute recesses. A maximum height Ry of a roughness curve R obtained by cutting this contact surface (11a) with a plane perpendicular thereto is 1-3 νm, and a peak height Rp with respect to the center line of the roughness curve R and a valley depth Rv with respect thereto have the relation of Rp/Rv≤0.3. This indicates that the contact surface (11a) has very low peaks of a relatively high distribution and very deep valleys of a relatively low distribution. Owing to the very low peaks of a relatively high distribution, a sufficiently wide contact area is secured. Owing to the valleys of a low distribution and a large depth, oil reservoirs of a sufficient capacity are formed.</p> |
