How Does A Drill Bit Work

Tungsten carbide is one of the most popular tool materials in the modern industry. In industrial markets, more and more people are fond of tungsten carbide due to its great properties, such as high hardness, wear resistance, shock resistance, impact resistance, and can work for a long time. 

Tungsten carbide buttons are one kind of tungsten carbide product. As tungsten carbide buttons are made of tungsten carbide powder as the main raw materials and cobalt powder as the binder, they can be as hard as tungsten carbide itself. 

Tungsten carbide buttons can be widely used in many applications and situations. They can also be inserted in drill bits as part of the drill tools, such as hammer drill bits, tri-cone drill bits, down-the-hole drill bits, and so on. But when you are using the drill bits, you will find that there are some holes in the drill bits. Have you ever thought about it Why are there holes in the drill bits Did they exist for saving tungsten carbide buttons Or for other reasons In this article, we are going to find the reason by exploring how a drill bit drills rocks.

The drill bits consists of tungsten carbide buttons, flushing channels, and the drill bit body. The holes we mentioned before, actually, are the flushing channels. The tungsten carbide inserted on the drill bits can be divided into face buttons and gauge buttons according to their location on the drill bits. The tungsten carbide buttons have to be very hard, strong, and stiff because they are the parts to penetrate the rock surface directly, and they have to withstand high stresses at the intersection points.

When the drill bits are working, the tungsten carbide buttons are rotating and fed with the drill bits and generate percussion forces from the drifter into the rocks. With the high impact, the rock cracks and crashes under the contact area, which will be flushed out from the drilling holes by the compressed air delivered through the internal flushing channel. After the high impact of tungsten carbide buttons and the repeated drilling, the holes will be finished easily.

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