Carbide drill type

Carbide bits are divided into four basic types: solid carbide bits, indexable carbide inserts, welded carbide bits and convertible carbide crown bits. Each bit has the benefit of being suited to a particular machining premise.

(1) Solid carbide Drill Bit

(2) Carbide indexable blade drill

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

(3) Welded carbide drill bit

The welded carbide bit is made by smoothly welding a carbide crown to a steel drill body. This kind of drill uses self-centering geometric edge type, cutting force is small, for most of the workpiece materials can achieve excellent chip control, the processing of the hole profile smooth, dimensional accuracy and positioning accuracy are very high, there is no need to carry out subsequent finishing. The bit adopts internal cooling system and can be used in machining centers, CNC lathes or other high rigidity, high speed machine tools.

(4) Carbide crown bit can be changed

Convertible carbide crown bit is a new generation of drilling tools. It is composed of steel drill body and changeable integral carbide crown. Compared with welded carbide bit, its processing accuracy is 82.5 jin, but because the crown can be changed, it can reduce the processing cost and improve the drilling yield. The drill provides accurate aperture increment and self-centering capability for high aperture machining accuracy.

Between the drill body and the carbide crown, the interlocking V-groove adjacent mechanism made of detailed grinding is used to lock each other, which can ensure that the bit assembly has the same dimensional accuracy and overall rigidity as the welded carbide bit. At the same time, the locking mechanism has only one exact matching position, so that the crown is easy to be installed on the matching rod, so as to ensure the repeated positioning accuracy when changing the crown. When the rod is pulled through the locking screw, the crown/drill body assembly is locked smoothly to each other, and its adjacent stiffness is sufficient to meet the requirements of rapid and high speed cross-yield hole machining. Seco-carboloy adopts the advanced needle molding process to produce carbide crowns with extremely high material evenness, resulting in even strength and uniform thermal deformation. Seco currently offers three CrownLoc bits with specific geometric edges. The first is a universal geometric edge with a conventional edge passivation radius, edge width, and taper Angle, suitable for processing a wide variety of steel materials. The second is the geometric edge with a wider edge belt and chamfering, suitable for processing cast iron materials; The third geometric edge reduces cutting heat and work hardening for stainless steel and super alloy materials.

The total life of the bit should also be taken into account when considering the cost per hole. Generally speaking, a solid carbide bit can only be reground 7 ~ 10 times, a welded carbide bit can only be reground 3 ~ 4 times, and the steel crown of the convertible carbide crown bit can be changed at least 20 ~ 30 times when processing steel.