Hardened steel is characterized by great strength and hardness, so its machining will require tools that are noticeably superior to this metal in terms of the specified characteristics. Only drills made of hard alloys, such as VK-6, VK-8, Pobedit, etc., are suitable.
How to drill a blade made of hardened steel
You can also successfully complete the planned operation using concrete drills, if its sharpening is re-sharpened on a diamond wheel for drilling hardened steel. It is possible to use a pen drill with a carbide tip for glass or ceramic tiles with appropriate regrinding.
Let's take advantage monolithic drill made of hard alloy VK-6 or VK-8. We will carry out drilling at low speeds and low feed using a special cutting fluid, which provides better drilling conditions and contributes to the safety of the drill.
For ease of drilling, we attach the knife blade to a wooden block using three screws, the heads of which will hold the steel being processed.
We drill 2 holes in the shank area, which are necessary to attach the new handle to the knife blade.
We carry out drilling on a tabletop drilling machine without core drilling, since the core will not take this steel, and we make sure to use a cutting fluid. After drilling approximately 2/3 of the blade thickness, we turn it over and drill from the back side along the formed bulges until we obtain full-fledged through holes of a given diameter.
