| 摘要 |
In the manufacture of a universal joint which includes an inner and outer joint member, a cage, and torque-transmitting balls supported in the cage and received in ball tracks formed in the outer face of the inner joint member and the inner face of the outer joint member, contact faces along which the balls run in the tracks and in contact with the cage are partially hardened to a relatively great depth taken relative to the wall thickness of the workpiece by means of a shaped inductor. The contact faces between the cage and both the inner and outer joint members, respectively, are also formed with a wear-resistant layer which is thin taken relative to the wall thickness of the workpiece.
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