As the main thread tools, taps, and dies, they are all used to create threads. The tap can cut or form a concave portion of a mating pair (for example, a nut). On the other hand, the mold is used to cut or form the male part of a mating pair, such as a bolt. Using a thread tap to cut or form a thread is called tapping, and a thread is to use a die to cut or form a thread.
It is not easy to choose a stepping tap, because it has a variety of styles that can correspond to different uses and applications. Therefore, in this article, we review several common thread tap types to help you choose.
1. Hand Taps
Hand taps are a very common type of threading tool that you can buy from nearly every local hardware store. Despite the commonality, it is not ideal for CNC operations. Hand taps are said to be one of the most cost-effective threading tools as they can yield great performance with minimal investment.
2. Power Taps
Power taps are power-driven tap that is essentially a “spiral point” plug tap. It is also known as the “gun tap”. This type of tap has cutting edges displaced to the tap centerline from an angle. Such design allows the chip to be broken continuously and ejected forward into the hole, preventing crowding. Power taps are typically used in holes that penetrate through the full length of material so that the chips can escape.
3. Forming Taps
Forming type is quite different from other types of taps. Forming taps force-displacement of metal into thread shape after being turned into the hole, rather than cutting metal from the sides of the hole like cutting taps do. Forming taps only work in malleable materials like aluminum or mild steel, which is why the formed threads are typically more robust than cut threads.
4. Spiral Flute Taps
Spiral flute taps closely resemble the endmills because of the open spirals. They are an ideal means for ejecting chips out of the hole. If you are working with blind holes, this is without a doubt the type of tap you should use. Furthermore, spiral flute taps are also very easy to manipulate, which are perfect for holes with interruptions. Compared to a hand tap, spiral flute taps are definitely handier despite there being features that overlap.
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