A turret for tool machine adapted to hold at least one rotating tool for turning it for machining a piece at the tool machine; said turret comprising: - at least a turret body supported by the tool machine; - a least a rotating drum supported by said turret body and supporting at least two tool holders upon which are mounted at least two rotating tools said rotating drum being mounted externally rotating around said turret body; - at least an electrical spindle positioned in a recess inside the turret body; said electrical spindle extending itself around a vertical axis Y-Y; - said electrical spindle comprising a motor, a rotating shaft for the transmission of the movement associated to said motor and an engagement portion suitable for coupling to said tool holders; - each tool holder extending itself along a vertical axis; - the rotating drum being rotatably mounted around said turret body in such a way as to rotate for aligning each tool holder with said engagement portion, said turret being characterized in that said tool is actuated in rotation by said rotating shaft through a direct physical coupling wherein an engagement ending portion of said rotating shaft is directly engaged with said tool holder, said ending engagement portion of said rotating shaft with the said tool holder has its own axis coincident with the rotation axis of said tool holder and realizes a direct coaxial engagement between said tool holder and said rotating of said electrical spindle and in that it comprises at least a translation group for vertically translating along axis Y-Y said electrical spindle comprising said motor between a first working position wherein at least a portion of said tool holder is engaged with said engagement portion and permits the rotation of the tool to a second position of tool change wherein said tool holder is disengaged from the engagement portion; - a cylindrical plier integrally with the head ending of a rod in the rotation shaft of the electrical spindle; said cylindrical plier is provided with of a plurality of cuts circumferentially arranged and oriented in direction of axis Y-Y; the head ending of the rod can slide along axis Y-Y of said shaft of the electrical spindle with respect to the cylindrical plier for determining the increase or reduction of the external diameter of it. said turret comprising: - at least a turret body supported by the tool machine; - a least a rotating drum supported by said turret body and supporting at least two tool holders upon which are mounted at least two rotating tools said rotating drum being mounted externally rotating around said turret body; - at least an electrical spindle positioned in a recess inside the turret body; - at least a turret body supported by the tool machine; - a least a rotating drum supported by said turret body and supporting at least two tool holders upon which are mounted at least two rotating tools said rotating drum being mounted externally rotating around said turret body; - at least an electrical spindle positioned in a recess inside the turret body; said electrical spindle extending itself around a vertical axis Y-Y; - said electrical spindle comprising a motor, a rotating shaft for the transmission of the movement associated to said motor and an engagement portion suitable for coupling to said tool holders; - each tool holder extending itself along a vertical axis; - the rotating drum being rotatably mounted around said turret body in such a way as to rotate for aligning each tool holder with said engagement portion, - said electrical spindle comprising a motor, a rotating shaft for the transmission of the movement associated to said motor and an engagement portion suitable for coupling to said tool holders; - each tool holder extending itself along a vertical axis; - the rotating drum being rotatably mounted around said turret body in such a way as to rotate for aligning each tool holder with said engagement portion, said turret being characterized in that said tool is actuated in rotation by said rotating shaft through a direct physical coupling wherein an engagement ending portion of said rotating shaft is directly engaged with said tool holder, said ending engagement portion of said rotating shaft with the said tool holder has its own axis coincident with the rotation axis of said tool holder and realizes a direct coaxial engagement between said tool holder and said rotating of said electrical spindle and in that it comprises at least a translation group for vertically translating along axis Y-Y said electrical spindle comprising said motor between a first working position wherein at least a portion of said tool holder is engaged with said engagement portion and permits the rotation of the tool to a second position of tool change wherein said tool holder is disengaged from the engagement portion; - a cylindrical plier integrally with the head ending of a rod in the rotation shaft of the electrical spindle; said cylindrical plier is provided with of a plurality of cuts circumferentially arranged and oriented in direction of axis Y-Y; the head ending of the rod can slide along axis Y-Y of said shaft of the electrical spindle with respect to the cylindrical plier for determining the increase or reduction of the external diameter of it.