FIELD: machine tool manufacture. SUBSTANCE: device has a bed on which a table connected to a rotary mechanism through a shaft is mounted. The table has four peripherally positioned hollows each of which is formed by two jaws moved along guides by the rotary mechanism. Each jaw has bearing and centering surfaces and an additional jaw which has a positioning member. The device also has three spindle units each of which has an abrasive tool and is connected to the rotary and positioning mechanisms. One of the spindles has a vertical positioning mechanism. Moreover, the device has a tightening mechanism and an additional tightening mechanism which are mounted in corresponding machining zones. EFFECT: improved structure. 3 cl, 8 dwg
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