Patent ID: 7467895

Claim:
A separator for a linear guide apparatus comprising a guide rail, a slider, and a plurality of rollers which circulate while rolling in an endless circulation passage provided in the guide rail and the slider and having guide grooves extending in an arrangement direction of the rollers, the separator comprising: a separator body interposed between adjacent ones of the rollers and comprising a pair of roller contact surfaces which respectively opposes to each other and contacts with an outer peripheral surface of the adjacent roller; and a pair of arm portions each jutting out from each ends of the separator body toward a direction of each of the adjacent rollers along with an end face of the adjacent roller, the pair of arm portions being guided by the guide grooves, wherein a surface of each of the arm portions opposing the guide groove of the endless circulation passage is formed such that an opposition distance with respect to the guide groove becomes wider from a fixed end side of the arm portion toward a free end thereof; wherein a sectional shape of the separator is defined by a sectional plane extending parallel to a roller axis of the adjacent roller, wherein in the sectional plane, the arm portions of the separator are dimensioned to remain within a circle having a center that is aligned with a center of the separator and the diameter of the circle substantially corresponds to a maximum width of the separator.