FIELD: mechanical engineering. SUBSTANCE: lathe tool has face, two flat lateral faces and flank. The corner part of the flank is flat. The face is concave and cylindrical and flat part of the flank is conjugated with its cylindrical part. The angle between the plane tangential to cylindrical face in the tool corner and flat part of the flank ranges from 60 to 85 C. EFFECT: enhanced quality of producing amplitude diffraction grating due to enhancing cutting properties.
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