FIELD: finishing process of working parts such as bearing races by means of free abrasive, possibly in machine engineering, instrument making and other branches of national economy. SUBSTANCE: apparatus includes housing carrying working chamber designed for placing worked part and abrasive medium. Working chamber is communicated with compressed air source through additional member in the form of ring provided with rollers having openings. Axes of openings of rollers are arranged in the same plane with roller axis and normally relative to it. Rollers are mounted with possibility of rotation around their axes in order to adjust apparatus for working surfaces with different dimensional parameters. EFFECT: enlarged manufacturing possibilities of apparatus. 3 dwg
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