Helical point taps are also called tip taps. They are suitable for through holes and deep threads. They have high strength, long life, fast cutting speed, stable dimensions, and clear tooth lines (especially fine teeth). They are straight A variant of the grooved tap was invented by Mr. Ernst Reime, the founder of the German NORIS company, in 1923. An inclined groove is opened on the cutting edge on one side of the straight groove to form an angle, and the chips are discharged forward in the direction of the feed. Suitable for through hole processing. Spiral point taps, also known as tip taps, are suitable for through holes and deep threads. They have high strength, long life, fast cutting speed, stable dimensions, and clear tooth lines (especially fine teeth). It is a deformation of the straight flute tap and was invented by Mr. Ernst Reime, the founder of the German NORIS company, in 1923. An inclined groove is opened on the cutting edge on one side of the straight groove to form an angle, and the chips are discharged forward in the direction of the feed. Suitable for through hole processing. When machining threads, chips are discharged forward. Its core size design is relatively large, has good strength, and can withstand large cutting forces. The processing effect of non-ferrous metals, stainless steel, and ferrous metals is very good. For through-hole threads, spiral tip taps should be used first. It is more suitable for processing non-ferrous metals. It is different from the working principle of the above-mentioned cutting tap. It extrudes the metal to shape and deform it to form internal threads. The extruded internal thread metal fiber is continuous, has high tensile and shear strength, and the processed surface roughness is also good. However, the requirements for the bottom hole of the extruded tap are higher: it is too large, and the amount of basic metal is small, resulting in internal The thread diameter is too large and the strength is not enough. Too small and the metal in the closed extrusion has nowhere to go, causing the tap to break. The calculation formula is: bottom hole diameter = nominal diameter of internal thread - 0.5 pitch. According to the method of use, they are often divided into hand taps, machine taps, nut taps (used for cutting threads on nut processing machines), die taps (used for cutting and correcting die threads), pipe thread taps and tapered threads. Tap.