Improved lubricated roller, in particular a bottom roller, for the tracks of crawler tractors and other similar vehicles

摘要

In the improved roller, sealing means (9) at either end each comprise a metal annular element (11) which is able to shift axially, and incorporates a smooth, slender frontal rim (14) breasted with the outward-facing frontal surface of the outer race (5) of an adjacent bearing (4) ; and a thrust washer (15) lodged between a relative thrust-bracket (7) and metal annular element (11). The surfaces actually breasted in relative rotation are those of the smooth rim (14) and the bearing outer race (5). The disclosed roller seeks to improve on existing types by simplifying and cutting the cost of manufacture, and at the same time, enhancing performance.