Special bearings used in mechanical components that perform linear motion. Balls or rollers move along linear rails, significantly reducing friction in slide mechanisms. Used in machine tool table feeds, linear actuators for automation equipment, linear axes of NC/CNC machines, and guide mechanisms for conveying devices. Achieves high-precision linear motion and long service life, with lower friction coefficient and superior maintainability compared to conventional sliding bearings. Used in combination with related components such as linear guides, slide rails, and linear bushings.