FIELD: mechanical engineering; endless drives. SUBSTANCE: main part of belt 10 of power drive is made of elastomer material containing 100 mass parts of at least partially hydrogenated copolymer nitrile rubber and from 0.5 to 50 mass parts of reinforcement fiber per 100 mass parts of rubber, fiber length-to-diameter ratio being 10: 1. Copolymer rubber including nitrile group contains preferably from 5 to 40% of nonsaturated nitrile monomeric units, from 1 to 80% of units of at least one monomer capable of reducing glass-transition temperature of said rubber, up to 20% of monomeric units of conjugated dienes and remnant being hydrogenated monomeric units of conjugated dienes. EFFECT: improved resistance to cranking at low temperatures and stability at high temperatures. 12 cl, 2 tbl, 5 dwg
