Abstract: A rotating shaft tool has a base body, with a guide slot in the base body, in which at least one elongate cutting blade can be arranged. An axial adjustment means which can be arranged at the mouth of the guide slot and by means of which the cutting blade can be adjusted axially in the guide slot. At least one spherical force exerting element, capable of moving the cutting blade in the axial direction, can be arranged at one end face of the cutting blade. Its axial displacement can be adjusted by means of at least one second force exerting element which deviates from the direction of movement of the first spherical force exerting element.