| 摘要 |
A linear motion guide unit is disclosed in which a slider moves relatively of and along a track rail by virtue of rolling elements of balls or rollers. The rolling elements are allowed to recirculate from a load raceway formed between the track rail and the slider to a non-loaded area composed of a turnaround formed in the slider to communicate with the load raceway, and a return passage formed in the slider to communicate with the turnaround. The return passage is encircled with a sintered resinous member of porous texture. Lubricant absorbed and held in voids in the sintered resinous member can be supplied over a prolonged period to the rolling elements, thereby lubricating the rolling elements to make the frictional resistance less, which might be encountered when the slider moves on the track rail, and ultimately helping ensure the improvement in durability.
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