| 摘要 |
PURPOSE:To enables safe and efficient grinding finish of a ceramic shaft and a metallic shaft, by a method wherein the size of the metallic shaft, joined with the ceramic shaft, is decreased over a size, within at least a range required for grinding fishish, of the ceramic shaft. CONSTITUTION:A diameter DM of a larger part 15A of a metallic shaft 15 is decreased over a diameter DC of a ceramic shaft 2. A collar for thrust bearing is engaged with a small part 15B of the metallic shaft 15, and is forced into contact with the collar surface of the large part 15A. In which case, a collar area, being wide eough to allow support of a thrust, must be ensured, and metal is more easy to machining, whereby the shaft of the metallic shaft 15 is previously increased to a little higher value, and centering adjustment is made through cutting of the metallic shaft 15 side. Further, the large part 15A of the metallic shaft 15 is previously increased slightly over the size of the ceramic shaft 2, and during cutting of the small part 15B of the metallic shaft 15 and a screw part 15C after joining, the size of the large part 15A is decreased over that of the ceramic shaft 2. |
