Novel recirculating bearing

A recirculating roller bearing for the longitudinally moveable mounting of an element on a planar bearing surface comprising a bearing body with at least one straight race section, a return section parallel to the said race section, two preferably semi-cylindrical end deflecting sections connecting the ends of the parallel return section and race section to form a closed circulating track and a plurality of rollers in said circulating track secured by retaining elements between successive rollers, said retaining elements engaging circumferential grooves in the race shoulders or flanges, the improvement comprising successive pairs of rollers are arranged in a rigid retaining element to prevent the rollers from falling out and the successive retaining elements bear loosely on one another without a mutual connection.