Geometric Characteristics of Tungsten Carbide Drill BitⅠ

Drill bits are usually connected to a mechanism, often simply referred to as a drill, which rotates them and provides torque and axial force to create the hole.

Tungsten carbide drill bits are cutting tools used to create cylindrical holes, almost always of circular cross-section. Exceptionally, specially shaped bits can cut holes of non-circular cross-section. Tungsten carbide drill bit can drill virtually all materials while holding an edge longer than other bits. The carbide material is expensive and much more brittle than steels; consequently they are mainly used for drill bit tips, small pieces of hard material fixed or brazed onto the tip of a bit made of less hard metal. However, it is becoming common in job shops to use solid carbide bits. In very small sizes it is difficult to fit carbide tips; in some industries, most notably PCB manufacturing, requiring many holes with diameters less than 1 mm, solid carbide bits are used.

Tungsten carbide drill bits come in many sizes and have many uses. The shank is the part of the drill bit grasped by the chuck of a drill. The cutting edges of the drill bit are at one end, and the shank is at the other.

 (To be continued. This article is divided into several parts. Here is part 1. For part 2, please refer to http://news.chinatungsten.com/en/tungsten-information/80547-ti-10417)

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