The machine tool comprises, mounted by journals (7,7) between two strong uprights (1,2), a cradle (6) which pivots about a pivot axis and carries a plate (15) which may be driven in rotation, and a general slide (3) mounted on the uprights and supporting a saddle carrying a carriage which is vertically movable and provided with a single tool spindle (13) which is capable of receiving, from a tool changer, either milling or drilling tools, or turning or boring tools, said spindle being thus capable of being moved toward the workpiece to be machined carried by the plate. An exterior power motor (32) drives the plate (15) through a transmission extending through one of the journals of the cradle.
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