LINEAR MOTION GUIDE APPARATUS AND TABLE TRANSFER APPARATUS

摘要

A linear motion guide apparatus wherein balls are retained from front and rear sides thereof in load ball raceway grooves (5, 10) by ball retaining portions (21) of ball chains (20) to prevent the balls from falling, opposed surfaces of a track rail and a movable block being drawn close to connecting portions to increase the depth of the load ball rolling grooves (5, 10) with a shape of a cross section of each ball rolling groove which is perpendicular to the axial direction thereof set close to the shape of an outer circumference of a central cross section of each ball.