Sharpening of chisels and planes
The first thing you should know before you start doing anything is to learn how to sharpen a chisel, sharpening a planer knife is similar, only slightly wider.
Procedure:
- We need two grinders. Coarse (two-layer carborundum works best) and fine slate, size approx. 200x50x25 mm.
- Everyone is sure to find a sharpener at home, but the grinding surface will not be smooth from previous use, so I recommend buying new sharpeners. You will save a lot of time while learning.
- It is also ideal to have a rotary sander. First, we level the chisel edge and sharpen the necessary angle on a rotary grinder, cool it with water.
- The angle of the chisel edge should be somewhere between 25-30 degrees.
- Wet the grinding wheels in water (mainly carborundum) and let them soak in.
- We place the carborundum grinding wheel on a flat surface, preferably a rubber one, and we can start grinding. Grind on the coarser side of the grinder.
- We place the slanted part of the blade on the sharpener with its entire surface and grind in circular motions over the entire surface of the sharpener until a "needle" /grot/ is formed on the opposite side of the blade.
- When grinding, the grinding wheel must always be wet, it is ideal when water is standing on it, so that the impurities created by grinding are washed away, the abrasive does not stick and the grinding stone does not wear down so much.
- Grinding on a coarse sharpener is done only on the slanted side of the chisel, which forms the angle of the blade.
- If we have a needle across the entire width of the blade, it is sharpened and we can start wrapping. We replace the carborundum sharpening stone with slate, wet it with water, just a little is enough, the slate doesn't absorb so much anymore, and we start to coat the blade.
- We start again on the slanted part of the blade and cover it with circular movements all over the sharpener. After a while, we turn the chisel over, press the entire surface of the chisel against the sharpening stone and continue the dressing on the other side of the blade. This is how we wrap alternately from both sides until the needle falls off by itself.
- In no case do not break the needle by hand, it must fall off by itself when threading.
- After the needle falls off along the entire width of the blade, the chisel should shave the hair on the back of the hand, if it does not shave, we continue to wrap alternately from both sides until it starts to shave.