FIELD: mechanical engineering. SUBSTANCE: abrasive grain has first surface coating of carbon black or graphite and second coating applied onto first coating and comprising silicon-containing composition selected from the group comprising silicates, organosilicates and mixtures thereof. Method involves using abrasive grain selected from the group comprising aluminum oxide or molten mixture of aluminum oxide and zirconium dioxide; applying first coating onto abrasive grains and second coating onto first coating, with following drying of coated abrasive grains. Abrasive grains are used for manufacture of flexible abrasive tool. EFFECT: improved throwing properties of abrasive grains and simplified manufacture method. 18 cl, 3 dwg, 2 ex
