Linear motion bearing segment

A linear motion bearing assembly for movement along a rail, the rail including an upper and a lower portion interconnected by a web portion with the upper and lower portions having a width greater than the web portion, the linear motion bearing assembly, comprising:

• a ball retainer structure formed of a pair of half arcuate self-contained ball retainer segments, each of said pair of half arcuate ball retainer segments includes
• an inner portion defining a pair of ball bearing tracks and having an inner surface configured and adapted to mate with a lateral surface of said rail, with each ball bearing track having
• an open load bearing portion,
• an open return portion, and
• turnarounds interconnecting said load bearing and return portions, wherein each load bearing portion of each ball bearing track is disposed adjacent to one another;
• an outer lid portion defining a load bearing plate aperture formed therein;
• a load bearing plate having a central body portion, a pair of longitudinally extending divergent flat portions, an outer surface, an inner surface oriented to be fit into said load bearing plate aperture, and a pair of longitudinally extending tracks formed along said inner surface, which pair of tracks serve as an upper surface of said load bearing portions of said ball bearing tracks;
• a plurality of bearing balls disposed in each of said pair of ball bearing tracks for transmitting a load from said rail to said load bearing plate and for facilitating a movement of said linear motion bearing assembly along said rail;
• an extending housing retainer structure including a pair of V-shaped projections extending inwardly from an inner surface of said housing structure;
• and
• biasing means having an elongated body portion and a pair of elongate corrugated leaf portions, said biasing means being disposed between said outer surface of each of said load bearing plates and said V-shaped projections of said housing retainer structure, wherein V-shaped projections press into said biasing means thereby applying a pre-load to said plurality of bearing balls in said load bearing portion of said pair of ball tracks which in turn press into said rail at each juncture between said upper and lower portions and said web portion.