Tap materialsizes

Tap materialfor metal

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Spiral Flute Taps have an open spiral just like an endmill. Their primary advantage is they eject chips up and out of the hole. They’re always preferable over spiral point taps when you have a blind hole. They’re also preferable for an interrupted hole where another feature intersects because the spiral helps restart the threading past the open feature. Commonly available in slow spiral (18-30° helix angle) or fast spiral (45-52° helix angle). Following are recommendations for a degree of spiral for various materials:

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Besttap material

We also have a great range of routing accessories, like guide bushes and jigs, for easier working and increased precision.

At Epic Tool we understand that there are many different types of thread taps with various uses and purpose. On top of that, there are also many different things to look at when selecting the proper tap such as material, volume of holes, coolant supply, rigid or floating holders, as well as the tap material, coating, geometry, etc. With that in mind, we are posting this blog as a guide to help you know when to use each kind of tap!

These thread taps have a spiral cut with relief grooves. They’re common and look like most of the hand taps you’ll see around. However, the spiral angle on the front cutting edges helps eject the chips and the angled edge also gives superior cutting performance. This feature, and the excellent shearing action of the flute, make spiral point taps ideal for production tapping of through holes. In general, they’re really the least expensive thread tap you might consider using for power tapping.

Tap materialtypes

Hand taps, typically bought at the local hardware store, are the most common types of taps, but they are generally to be avoided for CNC work. The straight flute is the standard style of tap, designed for a range of different common tapping applications.

Thread Forming taps don’t cut threads at all. The tap is chipless. Threads made this way are often called “rolled” threads. With this process, the metal is pushed out of the way and compressed into position rather than being cut. There are no chips to remove. As a result, the taps themselves are less likely to break and the threads they make are stronger. While many believe roll taps are only good for soft materials like aluminium, they can actually be used on materials up to a hardness of 36 HRC, which is about 340 BHN. That covers a surprisingly wide range of materials including a lot of steels.