Track with rotating bushings for track-type vehicles with improved sliding bearings

Track (10) for track-type vehicles, comprising a continuous sequence of articulated joints (12, 12′) of the hinge type, oriented according to a first axis (A-A) substantially perpendicular to the central longitudinal development axis (B-B) of the track (10), said articulated joints (12, 12′) being connected to each other and maintained at a constant distance through pairs of links (14) having longitudinal development, arranged laterally and symmetrically with respect to said longitudinal central axis (B-B), each link (14) being provided with a first end flange (16) facing outwards the track (10), with reference to said longitudinal central axis (B-B), and with a second end flange (18) facing inwards the track (10), with reference to said longitudinal central axis (B-B), each link (14) being provided with a first upper surface (20) and a second lower guide surface (24), opposite with respect to said first upper surface (20), made on said first end flange (16) being a first through hole (26), oriented according to said first axis (A-A), for the non-rotatable connection of said link (14) with one of the pins (36, 36′) of said articulated joint (12, 12′), and made on said second end flange (18) being a second through hole (32), oriented according to said first axis (A-A), for the rotatable connection of said link (14) with one of said pins (36, 36′), at least an annular sliding bearing (44) being housed inside said second through hole (32) of each link (14), characterized in that said sliding bearing (44) is made from a composite material consisting of a natural or synthetic fiber and a binding resin, and in that the ratio (Ri) between the thickness (S) and the internal diameter (D) of said sliding bearing (44) is comprised in the range between 0.02 and 0.1.