| 摘要 |
PROBLEM TO BE SOLVED: To provide a self-aligning roller bearing with a long life which does not cause premature peeling to be generated by a superficial damage such as peeling. SOLUTION: The self-aligning roller bearing 1 is provided with an inner ring 2, an outer ring 3 and double-row of spherical rollers 4 rollably arranged between the inner and outer rings 2, 3. The roller bearing is formed with raceway surfaces 2a, 2a of the double-row of spherical rollers 4 on outer peripheral surface of the inner ring 2 wherein inner peripheral surface of the outer ring 3 is formed as double-row one piece spherical raceway surface 3a. The spherical raceway surface 3a of the outer ring 3 is configured so that a solid lubricant coating 11 is coated by shot blast of a solid lubricant powder on metallic surface on which a fine groove 10 is formed and of which surface roughness Ra in axial and circumferential direction is regulated to be 0.1 μm or more and 1 μm or less wherein thickness of the solid lubricant coating 11 is regulated to be 1/10 or more and 1/2 or less of surface roughness Ra of the metallic surface. Then, surface roughness in the axial and circumferential direction of the spherical raceway surface 3a of the outer ring 3 is formed to be rougher than that of the raceway surface 2a of the inner ring 2. COPYRIGHT: (C)2010,JPO&INPIT |
