A simple file knife
Design of the knife
I manually sketched the design of the future knife (taking into account the width and thickness of the file). But did not put a dot on it, and in the process was ready to correct the form.
At first I processed the shank, then moved to the tip. All this was done on a grindstone. Then I started to work on the descent, which came out pretty well - not perfect, but I liked it. In the process, I did not let the file heat up, dipping it from time to time into a glass of water so that the steel would not become soft. It was easy to admit, because the thinner the file became, the faster it warmed up. Something attracted the butterfly and it stayed on my hand throughout the whole process.
Then, using sandpaper with P60 grain, I made the surface smoother. The incisions were abandoned, because their grinding would take a long time. The blade turned out with concave descents, because the sharpening was carried out on the circle of the grinding machine. I did not expect the surface to be smoother.
The handle is made of a 6 mm thick brass plate and a purple amaranth bar. I chose them, because brass and purple color blend well. I drilled two 5 mm holes in brass and connected them with a drill and a hacksaw blade. Usually in such cases, people use different files, but I don’t have them, and I didn’t strive for perfection.The shank through the bolster was inserted into a 5 mm hole in the tree, pre-filled with epoxy resin.
I let the glue dry overnight, then proceeded to handle the handle. At first I cut the bar in two, bringing its length almost to the desired one. After that, I clamped the knife with a clamp and proceeded to processing with the help of a disc sander with a grain P120. Care should be taken when working with the bolster,since wood is compared to brass, it is grinded much faster. After the profile acquired the desired shape, I proceeded to grinding the sides, giving them a rounded look. The whole process took about an hour.
Having processed the handle with emery paper with P240 grain, using a polishing wheel, I made its surface smoother. There were still scratches on it, but I liked them. After that, the wood was soaked with Danish oil (4 layers with light grinding in between). Then I spiked the butt of the arm of the wheel. The amaranth tree, oxidizing over time, becomes more purple, and in the photo it seems even more red.
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