Linear motion rolling guide device

A linear motion rolling guide device comprising:

• a longitudinally extended rail including at least one raceway on both right and left sides, a plurality of rows of rolling elements and a slider, by means of the rolling of said rolling elements between the raceway of the rail and its opposite facing race way on the slider respectively, sliding relative to the rail;
• the slider further comprising:
• a steel body with two downward elongations on both sides, whose opposite inside surfaces having longitudinally extended race way grooves formed;
• a pair of identical injection molded side frames, including a longitudinally arranged profiled member having the same length as the steel body, two transversely arranged endplates, perforated by the return passage and wherefrom having a convex half-roundness stretched, on both end of the profiled member, wherein a return passage of the said rolling elements is formed and defined when the side frames are bilaterally mounted to the outer surface of the said elongation and the steel body longitudinally situated inside and attached to the endplates;
• and
• a pair of end caps externally attached to the said endplates, including at least a pair of concave half-roundness;
• whereby the steel body, the side frames and the end caps have means for attachment and are thereof positioned to each other and the turnaround channel, which is formed by the concave half-roundness on the end caps and the convex half-roundness on the endplates, connects thereof endwise with the said race way grooves and the said return passage to form a circulation passage way for the rolling elements re-circulation.