DE3238980

A slide way bearing has a track shaft and a slide member to be slidably mounted on the track shaft. Track shaft has on its side surfaces first ball rolling grooves of circulation cross-section. Slide member has at its inner surface second ball rolling grooves corresponding to the grooves in the track shaft, and within the slide member through-holes at the back of the respective second grooves. The first and second grooves and through-holes form ball circulating paths. The intersecting points of lines of contact between the balls and the first ball rolling grooves are located outside of the polygon formed by connecting the centers of the balls. The circulating paths lies on the plane substantially parallel with the bottom surface of the track shaft.