Din335 HSS Countersink Drill Bit Europe Type

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Countersink holes are made with countersunk drills and are widely used in processing many types of materials. Therefore, by processing smooth holes or countersunk holes on the surface of the workpiece, fasteners such as screws and bolts can be fixed vertically to the workpiece. Although pilot holes are required for subsequent processing, their use greatly improves work efficiency and processing quality. In a cylindrical countersink, the end cutting edge performs the main cutting function, and the bevel angle of the spiral groove determines its rake angle. To ensure good centering and guidance, the countersink has a guide post at the front with a diameter close to the existing hole in the workpiece.

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A counter sink has a major cutting edge at its end, while spiral flutes have a bevel angle, which is known as rake angle, at their tip. In order to ensure good centering and guidance of this drill, it has a guide post at its tip that fits snugly into the existing hole in the workpiece. To make clamping easier, the tool shank is cylindrical and the head is tapered with an oblique hole. Its tapered tip has a beveled edge which is suitable for cutting purposes. The through hole serves as a chip discharge hole, allowing the iron chips to rotate and be discharged upward. The centrifugal force is helpful in scraping off the iron filings on the surface of the workpiece to prevent scratching the surface and affecting the quality. There are two types of guide posts, and countersunk holes can also be made in one piece if necessary.

The purpose of the countersink drill is mainly countersink and processing smooth holes. Its design and structure make it easier to work efficiently and improve the quality of the final product.