Shaft tool with detachable top

A shaft tool for metal cutting machining, comprising a cutting portion and a shaft portion removably interconnected;

• the cutting portion including a fist part formed with a cutting edge, and a second part formed with a continuous uninterrupted external conical screw thread;
• the first and second parts being of one-piece integral construction and injection molded of cemented carbide;
• the shaft portion including an internal conical screw thread to which the external screw thread is removably secured;
• the cutting portion and shaft portion including mutually engageable radial abutment surfaces, separate from the screw threads, for positioning the cutting portion and shaft portion relative to one another in a radial direction with reference to a longitudinal axis of the tool;
• the radial abutment surfaces including first cylindrical abutment surfaces disposed at axial ends, respectively, of the external screw thread, and second cylindrical abutment surfaces disposed at axial ends, respectively, of the internal screw thread;
• the first cylindrical abutment surfaces engaging respective ones of the second cylindrical abutment surfaces;
• the cutting portion and the shaft portion including mutually engageable axial abutment surfaces for limiting axial convergence of the cutting portion and shaft portion.