| 摘要 |
There is provided a linear motion rolling guide unit mainly comprising a square pillar-shaped long track rail having rail side track grooves formed in the longitudinal direction on both side surfaces of the rail, and a casing having an inverse U-shaped cross section mounted over the rail through a concave portion with a plurality of rolling members being intervened therebetween. Endless circulating passages for rolling members are provided within the casing or within an assembly of the casing and a pair of side plates, in a symmetrical relation at an angle alpha , as seen in the cross section of the casing, relative to the longitudinally and centrally extending vertical plane of the track rail. Almost all of the constitutional parts of the linear motion rolling guide unit such as the track rail, casing, side plates, direction turning passage-forming parts for rolling members, and the like are made of high performance engineering plastics such as PEEK resin, PES resin, PPS resin, PI resin, PAI resin, modified PPO resin, PEI resin, and the like, while the rolling members may also be formed not only from plastic resins, but also from stainless steel, glass, ceramics.
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