Patent ID: 7325889

Claim:
A track for use in a track-type vehicle comprising: a track link having an alternate combination of external links and internal links, said external links and said internal links being interlinked right and left relative to a width direction of a track, said internal link being formed symmetrically with respect to the central longitudinal axial line when viewed from the front; a coupler pin interlinking said external link and internal link, a rotatable bushing being interposed between the right and left internal links, said rotatable bushing being supported rotatably on said coupler pin; a coupler pin hole being provided through said external link, an end of said coupler pin being press fitted into said coupler pin hole; a bushing hole being provided through said internal link; and a fixed bushing, an outermost circumference of which being interfitted completely inside of said bushing hole; wherein said bushing hole of said internal link being formed greater in thickness as viewed in the width direction than said coupler pin hole of said external link and having a uniform cylindrical structure.