A crimping machine system comprising a set of jaws placed in a circular array, defining a central opening formed by the set of jaws and intended for a work piece to be crimped wherein the set of jaws is configured to move radially with respect to a central axis defined by the set of jaws, a flange structure configured to move in a direction parallel with the central axis, a first power transmitting member equipped with first and second inclined guide surfaces (13, 15) and placed between the set of jaws and the flange structure, wherein when the flange structure moves in the direction parallel with the central axis, the first power transmitting member is configured to force the set of jaws to move radially towards the central axis, characterized in that the crimping machine system further comprises: a circular structure which is ring-shaped and configured to rotate around the central axis, wherein the flange structure is placed inside the circular structure, a second power transmitting member equipped with first and second helical guide surfaces (19, 20) and placed between the circular structure and the flange structure for transmitting forces from the circular structure to the flange structure, wherein when the circular structure rotates around the central axis, the second power transmitting member is configured to force the flange structure to move in the direction parallel with the central axis, and third power transmitting members connected to the circular structure and configured to transfer power and movement to the circular structure, wherein the first helical guide surface is placed on the outer surface of the flange structure and is configured to enclose the flange structure, and the second helical guide surface is placed on the inner surface of the circular structure and is configured to enclose the flange structure. a set of jaws placed in a circular array, defining a central opening formed by the set of jaws and intended for a work piece to be crimped wherein the set of jaws is configured to move radially with respect to a central axis defined by the set of jaws, a flange structure configured to move in a direction parallel with the central axis, a first power transmitting member equipped with first and second inclined guide surfaces (13, 15) and placed between the set of jaws and the flange structure, wherein when the flange structure moves in the direction parallel with the central axis, the first power transmitting member is configured to force the set of jaws to move radially towards the central axis, a circular structure which is ring-shaped and configured to rotate around the central axis, wherein the flange structure is placed inside the circular structure, a second power transmitting member equipped with first and second helical guide surfaces (19, 20) and placed between the circular structure and the flange structure for transmitting forces from the circular structure to the flange structure, wherein when the circular structure rotates around the central axis, the second power transmitting member is configured to force the flange structure to move in the direction parallel with the central axis, and third power transmitting members connected to the circular structure and configured to transfer power and movement to the circular structure, wherein the first helical guide surface is placed on the outer surface of the flange structure and is configured to enclose the flange structure, and the second helical guide surface is placed on the inner surface of the circular structure and is configured to enclose the flange structure.