Homemade from the key. I already put it in the duty box
Finally, I decided to check what would come out of an ordinary cross-shaped lock key if I worked on it. At first, hands itched to make a drill for metal, but since key metal is quite soft (it looks like nickel + copper + zinc), the idea disappeared by itself. But another good homemade product still turned out.
In order for the key to acquire the desired shape, he had to cut the wings a little with an engraver, after which he got such an arrow with a wide, obtuse-angled tip. The angle between the cut edges came out somewhere 110-120% - just what you need for woodwork.
Then I sharpened each of the edges at a slight angle to get something like sharpening on the first drill. I narrowed the very top on both sides to make it sharper for better penetration into the material.
In general, it turned out to be primitive, but quite reliable. countersink for wood, which can easily make holes of different diameters. I think it will even work through to drill through a not thick rail, although I have not tried it yet.
On too soft wood, however, it tears the fibers a little, but on plywood or furniture laminated chipboard it works quite decently.
I tried to countersink holes for self-tapping screws of different sizes and it worked out well. Small depressions come out even and neat, but the larger the diameter, the more the shape of the holes tends to a triangle. But there are practically no such sizes of hats on self-tapping screws, so it's not scary.
I put the homemade product in a drawer. So, the marching set of tools was expanded by one more combat unit.
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