FIELD: mechanical engineering. SUBSTANCE: tool holder has a seat member for installing it on lathe turret head or on machine setting block, tool head provided with socket for cutter, and clamping mechanism for clamping tool head in seat member which has axial hole for tubular shank of tool head. Clamping mechanism is located in axial hole and has stopping member movable apart in radial direction for coupling the tubular shank of tool head. Clamping device has key introduced in corresponding keyway in tubular shank for angular positioning of tool head. Provision is made of means for turning the clamping mechanism round the longitudinal axis of seat member for changing angular position of tool head. EFFECT: higher efficiency. 7 cl, 11 dwg
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