The K-series linear guide rail adopts a roller-type rolling element instead of steel balls to achieve ultra-high rigidity and heavy load capacity. The line contact between the rolling element, guide rail, and slider allows for minimal elastic deformation of the rolling element under high load. The design with a 45-degree contact angle enables the linear guide rail to achieve equal high rigidity and load capacity in all four directions. By achieving ultra-high rigidity, it greatly improves machining precision to meet high precision requirements. The characteristics of heavy load capacity also extend the service life of the linear guide rail. It is particularly suitable for use in high-speed automation industry machinery and equipment with high rigidity demands。