Title: Heavy machine tool and device for depositing and placing a tool head in readiness for use

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Abstract: A heavy machine tool, especially drilling and milling machine, which has a head stock with a supporting sleeve therein for receiving a boring spindle and a pull rod operable chucking device for chucking a tool head, and which also includes a device for depositing tool heads and placing the same in readiness for use. The housing for the tool head has on its outside a circular groove located at the side of the head stock in a plane which is located perpendicular to the axis of the boring spindle while within the range of movement of the tool head there is provided at least one device for depositing a tool and placing the same in readiness for use which last mentioned device includes a vertically arranged deposit plate the upper edge of which corresponds in shape to the shape of the arc of the annular groove and has a thickness corresponding to the width of said groove and upon which the tool head is adapted to be deposited by means of said annular groove, said range of movement of the respective tool head being determined by the displacement of said head stock, of said supporting sleeve, and/or the respective tool head.


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