The development of modern industrial robots tends to be lightweight. Bearings must be installed in a limited space and must be small in size and light in weight. Thin-walled bearings are widely used in robots. As one of the key components of industrial robots, industrial robot bearings are suitable for joints of industrial robots. Part or rotating part, manipulator rotating part, etc. The use of uniform cross-section thin-walled bearings can save space, reduce weight, significantly reduce friction, and provide good rotation accuracy. Make it possible to lighten and miniaturize the host.