FIELD: mechanical engineering. SUBSTANCE: working tool has movable grinding cone and immovable cone with concentrators made in the form of inserts attached to working surfaces of cones. Inserts are made from wear-resistant highly-consistent material and arranged within grinding zone in concentric or helical circles. Working tool may be used for grinding of high- strength hard materials into small-sized or average-sized particles. EFFECT: simplified construction, enhanced reliability in operation, increased grinding extent and efficiency and prolonged service life. 4 dwg
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