| 摘要 |
PROBLEM TO BE SOLVED: To provide a thrust bearing in which rust is not generated even if caulking a peripheral part of a case which uses a trivalent-chromate treated steel plate.SOLUTION: In a trivalent-chromate treated case 8b which is applied with trivalent chromate treatment on a surface, a notch is formed at a lower end of a peripheral wall 7b of the case, and a groove 15 is formed at an internal peripheral side of a root portion of left and right peripheral walls 7c of the notch by grinding. An external peripheral face of the peripheral wall 7b of the case 8b is protected by a cylindrical die after assembling a thrust bearing, the tapered die is pressed to a portion of the peripheral wall 7c of the case 8b without rotating it in a state that swelling to an outside diameter side caused by caulking is prevented, and a caulked part 18 is formed by bending a portion which is thinned in thickness by the groove 15.SELECTED DRAWING: Figure 1 |
