Motion guide device

A motion guide device comprising:

• a track member having a rolling member rolling surface formed thereon;
• a movable member having a loaded rolling member rolling surface facing the rolling member rolling surface formed thereon and having a rolling member return passage extending substantially parallel to the loaded rolling member rolling surface;
• a pair of cover members provided at both a front end and a rear end in a moving direction of the movable member and each having a turnabout passage connecting the loaded rolling member rolling surface and the rolling member return passage together;
• a plurality of rolling members arranged freely rollably in an endless circulation passage including the loaded rolling member rolling surface, the rolling member return passage, and the turnabout passages;
• and
• a lubricant supply passage provided in at least one of the pair of cover members and configured to supply lubricant to the endless circulation passage,
• wherein the lubricant supply passage includes at least
• a first lubricant supply passage formed to extend in a direction orthogonal to a longitudinal direction of the track member from at least one of a left side surface and a right side surface of the cover member, and
• a second lubricant supply passage connected to the first lubricant supply passage, and
• a passage shape in a place connected to the first lubricant supply passage of the second lubricant supply passage is configured as a diameter-expanded hollow section having a diameter more expanded than a passage shape of another place, and
• wherein the first lubricant supply passage is tunnel-shaped and connected to the diameter-expanded hollow section of the second lubricant supply passage.