FIELD: machine tool manufacture, possibly grinding grooves and other surfaces of parts at controlling heat flux directed to part. SUBSTANCE: apparatus includes two discs mounted on spindle of machine tool with possibility of axial motion and engaging one with another by means of spacing and adjusting screws. Turn halves of grinding wheel are secured to periphery of said discs. Grinding wheel is in the form of annular body with abrasive layer secured to it. Ends of turn halves are secured to different discs for forming multistart screw cutting surface. EFFECT: enhanced efficiency and quality of grinding due to intensified grinding modes, oscillations of cutting zone and increased rigidity of construction. 2 cl, 5 dwg
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