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    May 2021
    M T W T F S S

    Tool sharpening

    Tool sharpening

    Proper performance of any work in the workshop is guaranteed by efficient and sharp tools. Chipped, bent and blunt prevent the achievement of the desired effects of work. Moreover, it is practically impossible to obtain even edges of the processed materials or smooth surfaces. Let's remember, that store-bought tools are generally not sharpened, DIYers have to carry out this difficult and time-consuming task on their own.

    Sharpening a knife consists in evenly rubbing the edge of the saw blade on both sides and giving it the correct blade angle, that is, the angle formed by the walls of the cutting edge of the saw blade.

    The sharpening time depends on the quality of the whetstone, degree of knife bluntness and sharpening practice. During sharpening, the knife must be turned over from time to time, and moisten the whetstone with water. For the final smoothing of the blade, we use marbles moistened with water or machine oil. You can also sharpen the knives on a mechanical grinder. This operation should be performed with great care, because it is easy to harden the knife.

    Sharpening chisels and planer knives is similar, except that with these tools, only the oblique cut surface is sharpened, the reverse side is rubbed with a marble several times in order to even out it. The corners of the planer knives must be slightly ground, so that they do not leave too sharp marks on the surface of the treated wood. A jagged chisel or plow blade is ground down on the grinding wheel (rys.c).

    Planer knives are best sharpened on large sandstone, round stone, the so-called lumber, a crank or an electric motor set in motion. Moisten the stone with water while sharpening.

    The method of applying the blade to the surface of the wheel is shown in figure a. The sharpened knife should be smoothed (Lynx. b) on a special marble (available at abrasive stores). We smooth both surfaces of the blade, moisturizing the marble with plenty of water. Keep in mind when sharpening planer knives and chisels, so as not to change the angle, under which the blade was ground at the factory.

    We use manual or mechanical grinders to sharpen drills, the so-called. sharpeners. Sharpening consists in grinding the flank surface. The cutting edges should be the same length, equal angles in the transverse direction (tightening angle), and the drill axis should pass through the center of the transverse edge – through the center of the cut. However, it is not that simple. Therefore, it is best to use the help of a specialist in a locksmith's workshop.

    Before sharpening the saw, you should open its teeth with a setter. This work requires some experience, therefore, young builders should rather turn to a professional carpenter for help. Badly divorced saw teeth make work much more difficult. The saw is sharpened with a triangular file. Sharpening is about giving all teeth the same shape and height, and the cutting edges – correct angle.

    Place the saw blade in a vice between two blades, which dampens vibrations during sharpening. We sharpen the teeth of the saw when the file is moved "away from each other", holding the file with your right hand on the shaft, and the left hand by the tip and sliding between the teeth. Generally, the file is run perpendicular to the saw blade (Lynx. a). In the case of isosceles saws, we tilt it at an angle of 65 ° to the longitudinal axis of the blade. It takes as long to sharpen, until the top edges of the teeth are glossy. Let's take care of it, to make the same number of sharpening strokes with the file on each tooth.

    Here's a DIY tip, who want to divorce their saw teeth on their own: the teeth are alternately diverged to both sides from the blade axis (depending on the type of saw after 0,25-1,00 mm). Be careful when doing this, that the deviation of the teeth is equal in both directions (Lynx. b).

    Because the tool is subject to wear in the course of work, and often also damage due to improper use, young DIY enthusiasts should periodically carry out a systematic inspection and maintenance of their tools. It's easy to see, that only efficient tools make it possible to get the job done faster and better.

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