What is the principle of machine tool guide rail changing from sliding friction guide rail to rolling friction?

The principle that the machine tool guide rail is changed from the original sliding friction guide rail to rolling friction is that the steel ball makes infinite rolling cycle between the slider and the slide rail, so that the load platform can easily make high-precision linear motion along the slide rail. Rolling elements such as balls, steel balls and needle rollers are placed between the guide surfaces of the machine tool, so that the sliding friction between the guide surfaces becomes rolling friction, which reduces the resistance and is more sensitive.