Thread cutting tool has several basic types.
Threaded tools and combs are shaped tools used on machine tools, can be rod, prismatic and round. It has a simple design, versatility and manufacturability. Cuts internal and external threads on cylindrical and conical surfaces.
Taps are thread cutting tools used for cutting metal in pre-prepared holes for internal threads. It has the appearance of a hardened screw, which has cut grooves running along the rod and performing the function of cutting edges. They are manual and machine. For its manufacture, hard alloy is used or high-speed steel is used.
Dies - a thread-cutting tool in the form of a hardened nut, which has axial holes with cutting edges. The shape of the tool is equipped with holes for chip removal. The cutting part of the tap is made in the form of an internal cone. The die can be made of alloyed andhigh-speed steel, and it is also possible to manufacture from hard alloy. Designed for external threading and calibration on various types of parts.
Thread cutters are thread cutting tools with several teeth (blades) for machine milling. There are cylindrical, end, worm, end and conical. Process wood, copper graphite, aluminum, cast iron, steel, hardened steel and stainless steel. The cutting part can be made of high speed steel, cermet, carbide and diamond.
Die threading
The workpiece, which has the form of a round rod with a diameter equal to the desired thread, is clamped in a vice in a vertical position. For a comfortable entry of the die, a small chamfer is removed with a needle file. The die is fixed in the socket and put on the workpiece, well lubricated with machine oil. With a slight pressure on the die, they begin to screw onto the rod, trying to avoid distortions. After making a small number of turns clockwise, the die is returned to its place, about half a turn. And continue in this way throughout the threading process.
How to thread with a tap
This process will require a hole to be drilled and chamfered for proper tap entry. Using the reference book, the diameter of the hole is selected, starting from the desired thread pitch.
Each size set has three types of taps, where each performs its function. The first one is neededfor the preliminary pass, the second one is used to complete the process, and the third one is used for finishing. The threading process follows the same principle as a die. There is a repetition of several cycles back and forth with a large amount of engine oil. When cutting blind holes, it is recommended to turn the tap periodically to remove accumulated chips. You should continue until you feel a stop.
