Carbide drills are divided into four basic types: solid carbide drills, carbide indexable insert drills, welded carbide drills and replaceable carbide crown drills. Each drill has benefits suitable for specific machining conditions.

(1) Solid Carbide drills

(2) Cemented carbide indexable insert drill

Drills equipped with carbide indexable inserts can process a wide range of apertures, and the processing depth ranges from 2D to 5D (D is the aperture), which can be used in lathes and other torsion machining machines.

(3) Welded Carbide drills

Welded carbide drilll bits are made by smoothly welding a carbide crown to a steel drill body. This drill adopts a self-centering geometric blade, with low cutting force, and can achieve excellent chip control for most workpiece materials. Follow-up finishing. The drill adopts an internal cooling system and can be used in machining centers, CNC lathes or other high-rigidity, high-speed machine tools.

(4) Interchangeable carbide crown drill bit

Interchangeable carbide crown drills are a new generation of drilling tools. It is composed of a steel drill body and a replaceable solid carbide crown. Compared with a welded carbide drill, its processing accuracy is 82.5 kg, but because the crown can be replaced, the processing cost can be reduced. , improve drilling productivity. This drill can obtain accurate hole size increments and has a self-centering function, so the hole machining accuracy is very high.

The drill body and the carbide tooth crown are locked with each other by a finely ground interlocking V-shaped groove connecting mechanism, which can ensure that the drill bit assembly has the same dimensional accuracy and overall rigidity as the welded carbide drill bits. At the same time, this locking mechanism has only a single exact matching position, so that the tooth crown can be easily installed on the matching tie rod, thereby ensuring the repeated positioning accuracy when changing the tooth crown. When the tie rod is tightened by the locking screw, the tooth crown/drill body combination is locked to each other smoothly, and its connection rigidity is sufficient to meet the requirements of fast-feeding, high-speed cross-production hole processing. The cemented carbide crowns manufactured by Seco-Carboloy using the advanced injection molding process have extremely high material uniformity, so that the crowns have average strength and uniform thermal deformation performance.