Tungsten carbide spade drill is made up of handle and blade. Normally, the shank of a hard alloy spade is made of steel, and the blade of the convertible head is made of hard alloy. The hilt has two structures: the side handle and the Morse handle. It is used for CNC lathe and CNC machine tool. The Morse handle is used in traditional equipment such as vertical drilling, rocker drill and pusher. By simply installing a cooling ring device, the external cooling can be converted to internal cooling. The cooling water enters the tool rod through the cooling ring and is cooled directly to the blade section through the internal cooling hole. And the high pressure of the cooling water is more conducive to defecation.

The blade can also be divided into two types, carbide blade and high speed steel blade. The range of carbide blades ranges from 9mm to 32mm. The range of high-speed steel blades ranges from 9mm to 68mm, and part of the non-standard blade can even be made larger. The high speed steel blade is generally cobalt high speed steel with 8% cobalt, which has good wear resistance and toughness. However, the performance of the carbide blade is much better than the steel blade, and the service life is relatively long.

The tungsten carbide spade drill is positioned through the groove, and the two screw holes are fixed and fixed, which can ensure the symmetry of the blade between 0.01 and 0.02mm. According to the size of the blade, there are usually 2 to 6 chip slots. According to the different cutting materials, the tip of the blade is X - shaped drill point or s-shaped drill tip.

Advantages of hard alloy shovel drilling

A deep hole that is easy to double. The blade is a symmetrical structure with double edge cutting in the center, and it is made of tungsten carbide, so it can reach even the deep hole of 20D. The ordinary U drill, the shallow hole drill can not hit the deep hole, can be completed by the shovel.

The hard alloy shovel can be widely used in traditional machine tools such as rocker drill. Traditional machine tools are not able to be used because of low spindle speed, poor rigidity, weak power, general fast drilling, and U drill. And the spatula is made of hard alloy coating blade, which has high toughness and impact resistance, and can effectively solve the problem of collapsing blade.

The accuracy of tungsten carbide spade drill is much higher than that of U drill. A U drill is a blade that installs two asymmetric cutting blades. Blade cut into the workpiece surface, within the blade on the blade and the blade of axial force is not balanced, will cause the change of size, so U boring only as rough machining cutter, precision of + / - 0.1 mm. Blade symmetry cutting, the dimension precision can be controlled within 5 threads. Direct drilling can meet the requirement of thread bottom hole. The side of the shovel blade is trimmed with a smooth blade, which can reach RA1.6 through the extrusion of the polished blade belt.

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