Patent ID: 6899462

Claim:
A linear antifriction bearing comprising: a guide rail having a U-shaped cross section and the guide rail including first inner side raceways arranged parallel to the rail longitudinal direction, a running carriage displacable longitudinally along the rail, rolling elements supporting the carriage on the first raceways inside the guide rail, the running carriage having a supporting body; the rolling elements being arranged in a plurality of endless tracks on the supporting body for the running carriage; each track having a first row of supporting rolling elements, a second row of returning rolling elements and two rows of rolling element deflection means that connect the first and second rows to one another; second raceways; facing outward on the running carriage, the first row of supporting rolling elements being arranged on the second raceways a return channel of the supporting body, and the second row of returning rolling elements being arranged in the return channel; the supporting body having an opening parallel to the raceways; each channel being formed by a filling body which is arranged in the opening and each return channel having a continuous recess for each rolling element track, which runs in the longitudinal direction and in which the returning rolling elements are arranged, wherein the supporting body opening is a circular cylindrical bore, and the filling body is an insert inserted suitably into the opening in the supporting body, and the insert having a substantially circularly cylindrical outer surface.