| 摘要 |
1339557 Bearings SKF INDUSTRIAL TRADING & DEVELOPMENT CO BV 10 Dec 1970 [12 Dec 1969] 58680/70 Heading F2A A ball bearing has sheet metal bearing races and an annular series of balls, each race being deformed so as to define an annular rib which extends entirely around that surface of the race which is remote from the surface in which the raceway is formed, the width of the rib being at least equal to that of the raceway, but less than the diameter of the balls, whereby the depth of the race is substantially constant. The races may be formed by rolling, pressing or embossing. |
