The content of the tap (INNENSPAN) is an advanced and efficient thread processing tools,. The utility model is characterized in that the head of the utility model is provided with a large enough chip groove, and the inner row is cut when working, so as to avoid contact with the processed thread.
The utility model is suitable for the processing of the large diameter internal thread hole of the numerical control boring milling machine, and is also suitable for processing the inner thread hole on the radial drilling machine. The maximum processing thread up to M300, is the first choice of large diameter thread processing in addition to thread milling. Commonly used specifications are: M36, M42, M45, M48, M52, M56, M60, M64, M72X6, etc..
The main component of the chip tap is the cutting edge and guide the two parts. Cutting edge through the whole tooth profile of the grinding, the length of about 3 pitch. No guide groove, only slightly smaller diameter, from the calibration function, avoid the deviation caused by the screw axial or radial force.
The content tap is mainly used in the processing of large diameter and high quality thread hole. M64 below the NORIS content of the tap is usually made of integral type, more than the size of the composition style.
Advantage：
1, processing through holes, blind holes can be;
2, applicable to all kinds of material less than 1100 N/mm2;
3, because there is no chip slot, which has excellent self oriented;
4, the iron chip discharge direction is always consistent with the cutting direction, without damaging the thread;
5, short processing time, high production efficiency;
6, single tap processing pitch can be as high as 6 mm (according to the material), for easy chip material, the pitch can be bigger;
