Spiral 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 teeth (especially fine teeth). They are a deformation of straight fluted taps. It was invented in 1923 by Ernst Reime, the founder of the German NORIS company. On one side of the straight groove, the cutting edge is chamfered to form an angle, and the chips are discharged forward along the direction of the knife. Suitable for through-hole processing.
Its characteristic is that a wedge-shaped groove is opened on the head of the straight groove tap to change the shape of the cutting cone, thereby pushing the chips forward and expelling it. Therefore, it is generally only used for through-hole thread tapping.
Because the special chip removal method of screw-point taps avoids the interference of chips on the surface of the formed thread, the thread quality of screw-point taps is generally better than that of spiral flute taps and straight flute taps. At the same time, the cutting speed can generally be increased by more than 50% compared with spiral flute taps, which greatly improves the processing efficiency.
In addition, screw-pointed taps generally have 4-5 cutting edges, which further reduces the amount of cutting per tooth, thereby increasing the service life of the tap. Generally speaking, compared with spiral fluted taps, the life of screw-pointed taps will be prolonged by at least one time. Therefore, for through-hole tapping, if there is no special requirement, screw-point taps should be the first choice.
If you have any needs, you can check our website.
https://www.mskcnctools.com/point-tap-product/
Post time: Dec-06-2021
