FIELD: machine engineering, namely chain transmissions of building, road, agricultural and other machines. SUBSTANCE: large-diameter sprocket includes rim and toothed crown in the form of toothed sectors. Sprocket is also provided with additional rims and additional toothed crowns. Toothed sectors of said crown are formed by parting surfaces arranged radially and mutually spaced by equal central angles; at side of rotation axle of sprocket said sectors are restricted by flat supporting surface normal relative to symmetry axis of sectors. Said rim or rims also have flat supporting surfaces for arranging onto them said supporting surfaces of toothed sectors. Each toothed sector, rim or rims are provided with openings for mutually securing them by means of bolts. EFFECT: increased service life and lowered cost of manufacturing process. 5 dwg
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