The rolling element of the roller guide replaces the steel ball and is designed to achieve ultra-high rigidity and overload capacity; By using the linear contact method between the rolling elements and the sliding rails and sliders, the rolling elements only form a small amount of elastic deformation when subjected to high loads. With the design of a 45 degree contact angle, the overall linear guide achieves the characteristics of equal rigidity and equal load capacity in all directions. By achieving ultra-high rigidity, machining accuracy can be greatly improved to meet the requirements of high precision; Due to the characteristics of overloading, the service life of linear guides is extended.