The movement of the machine parts can be divided into rolling pieces, linear motion or a combination of both. With the development of rolling bearing about 110 years ago, rolling contact became a standard method to realize rolling motion. Then set off a great technological revolution. Rolling contact is not only saving the kinetic energy, but also can keep the friction resistance at the lowest level, thus can greatly improve the performance of the machine. However, although such development achievements in the field of linear motion value may be ten times more than this, but through the rolling contact can calculate on techniques of linear motion is long overdue.