Tungsten Carbide Countersink

Tungsten carbide countersink is also called tungsten carbide countersink drill, which is composed of the hard phase WC and the binder phase Co and it can manufacture the flat end surface holes, cylinders, cones and other surface. In general, tungsten carbide countersink consists of steel blade and tungsten carbide tip, which plays an important role in automotive internal combustion engine manufacturing. According to different processing purposes, the countersink can be divided into plate countersink, cylindrical countersink, conical countersink, end countersink and so on. The commonest flat countersink has 3-4 buttons on the each circumferential end surface. In processed hole insertion guide posts, and its role is to control the original error is countersunk hole concentricity. The post usually made into detachable pattern, which is convenient for the end surface of countersink machining and sharpening.

According to the different requirements of workpiece tapered countersink, the taper angle of conical countersink has 5 kinds of 60°, 82°, 90°, 100° and 120°, and the most of using is 90°. Cylindrical countersink play a major role in cutting is the end face of the blade, bevel helical groove is its front angle. Countersink drill tip has a guide post, guide post hole diameter and the workpiece has been tight clearance fit to ensure good centering and guide. This pillar is detachable, but can also countersink drill guide post integrally formed. The end face countersink is designed for the end surface of the plate, which can ensure the vertical of bore and the center line. When small aperture processed, in order to maintain a certain strength of the rod may be the holder of the head section and the diameter of the machined hole clearance fit, thus ensuring a good guiding effect. In a word, tungsten carbide countersink not only has high hardness, high strength and excellent wear and corrosion resistance, but also easily for manufacturing and high in efficiency, which has been widely used in machinery manufacturing industries, especially for some parts of the bolt on the engine via bearing surfaces machining is applicable.

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