Each man in the house will benefit from a convenient machine for sharpening knives with his own hands. After all, often the owner is judged by how sharp this kitchen tool is.
There are many tricks for sharpening knife blades. For example, for a process carried out at home, only a whetstone for turning or finished devices with an angular shape of the gap will be sufficient.
To correct expensive hunter knives, European manufacturers produce devices in the form of solid bars, the basis of which is a high-strength alloy.
This article will describe the manufacture of a machine for sharpening knives with their own hands.
Why are knives dull?
What is the reason the knife gets dull when cutting? This can be explained by the fact that abrasive particles that are present in the material being cut have a negative effect on the cutting edge. For example, they are present on vegetables, paper. In simple terms, the blade is subject to gradual abrasion.
The next reason is the inability to hold the blade in the right position all the time. Any hand trembling causes the knife to tilt, which entails a lateral load.
Sharpening technique
The technique of sharpening consists in standardized, but at the same time rather labor-intensive methods. The main task is to repair damage to the blade. It should be noted that for many, such a procedure as sharpening knives provides good mood and soothing.
The basic rule in this process is to adhere to a precisely defined constant angle. Strength is not required here. The main thing is that the bar and blade meet at a certain angle. This is the main rule of the sharpening technique.
What needs to be done to maintain a constant angle?
In order for the angle to have a constant indicator, there are two ways. The first is to gain sharpening skills. The angle indicator can be controlled using a conventional marker. They should paint over the carts and after a few sharpening cycles see how much paint has been preserved. If it is erased unevenly, then the blade is not well processed.
If the sharpened knife is decorative, then glue the blade with tape so that only the cutting edge remains open. Even if you unsuccessfully point your hand, there will be no scratches on the blade.
An important point is that the direction of the blade along the bar is carried out perpendicular to the edge at the points of contact. Actually, this is quite difficult to accomplish. It is acceptable that the angle between the edge and the blade is less than 90 degrees. But with a direction along the cutting edge, such an indicator is not suitable.
Abrasive particles of the bar can leave grooves on the blade that will never be sharpened, but will play a positive role when cutting. If the grooves are oriented along the cutting edge, then when cutting they will not be useful. The worst thing is that the cutting edge can even break off.
It is important that the bar is long. It should be one and a half or two blade lengths. It is allowed that the diamond bar be slightly shorter, as it grinds faster and better. Its width does not play a significant role. If it is of greater width, then working on it is more convenient and less likely to bring the blade beyond the limits of the device. This may damage its side surface or blade.
Making a machine for sharpening knives with your own hands
Homemade knife sharpeners come in many designs. All that is required from the manufacturer is the availability of the right material and skills to work with tools.
The principle of operation of such a device as a manual machine for sharpening knives with their own hands is to keep the blade of the knife in a vertical position and driving it along a bar fixed at the right angle. This is much easier than placing the sharpening bar horizontally and holding the knife at the right angle.
In order to make a machine for sharpening knives with your own hands, you need a piece of laminate, a wooden lath, sandpaper and a couple of bots with lamb. Chipboard or plywood can serve as a replacement for the laminate
To make a knife holder, you need to cut off a part of the material. So that the bar does not touch the holder when sharpening, it is necessary to clean its edge at an angle with emery.
It is necessary to mark and cut off the top of the vertical rack, which will serve as a support for the bar. The angle is chosen two times less than the one with which the knife will be sharpened. For kitchen knives, it is recommended to take an angle of 10-15 degrees.
A do-it-yourself machine for sharpening knives, the drawings of which are drawn up deliberately, involves the correct calculation of the length of the base of the racks. Note that a subsequent installation of the transverse support will affect the height indicator. After that, all the parts are trimmed, and the edges are cleaned.
Holes are marked and drilled in the base and plate for clamping the bolts holding the blade. When marking, the distance of the holes from the edge of the base is maintained. This is necessary for the versatility of the device, since all knives have their own width. The pressure plate is bolted.
Vertical racks are fastened with screws. The moment that the load on the bottom is small is also taken into account. In this case, it is better to resort to the use of thermal glue. In exactly this way, the horizontal bar is attached. The grinding device is almost ready. It remains to make a bar.
For its manufacture, a rail of the desired length is cut. Emery paper with the right size of abrasive is glued to one edge. To optimize the result, you can resort to the manufacture of several bars with different grit indicators. The P600 - P2000 range is considered the best. In order to protect your hands from cuts, you need to screw the handle on the top side of the rail.
The result is a home-made machine for sharpening knives with their own hands, characterized by high functionality and practicality. When working, the device rests on the edge of the table, which is quite comfortable when using it.
The machine for sharpening knives with their own hands can be of a different kind. In this case, its basis is an M8 threaded rod. Two large washers and nuts were used, which serve to hold the bar 200 mm long.
The heat shrink tube closes the thread. A pair of paper clips serve as clamps for the guide stand at the desired height. This ensures smooth adjustment of the grinding angle. The base is a beam, the thickness of which is 40 mm. It is supported by hand.
How to grind planing knives with your own hands
Every owner who has a planer or planer, probably faced with the problem of sharpening their knives. Periodically acquiring new is expensive. Knives can be sharpened easily with your own hands. In this case, specialized machines or grindstones are used. If the planer is used constantly, it would be better to make a machine for sharpening knives with your own hands.
Do-it-yourself machine for sharpening the planer knife
For sharpening the planer knife use special grinding equipment. The machine for sharpening knives with their own hands has a compact size. It can be installed in a garage or on a personal plot.
Many are interested in how to make a machine for sharpening knives with their own hands. To make the fixture, you need to find certain details. Perhaps these parts are lying around in your barn or garage. They can also be purchased via the Internet.
DIY sharpening machine for planing knives comprises:
- faceplates;
- the table;
- engine;
- a vacuum cleaner;
- casing.
First of all, you should find the faceplate. This is the most important component of future equipment. She is responsible for the grinding process. The jointer knives are narrow, and the faceplate serves as a guarantor of a complete and safe sharpening. This item will have to be bought new, but the rest can be used also old.
It is better to purchase faceplates of German or American production. The average cost of a part is 25,000 rubles.
The next step is finding an engine whose power should be 1-1.5 kW. Buying it is not necessary. Any one will do, even from an old washing machine. But everyone will find a table, a casing and a vacuum cleaner.
The main stages of the manufacture of the device
When the table is selected, the engine is fixed directly under it. The faceplate is attached to the moving part. The engine should initially be equipped with a button that enables turning the unit on and off. It should be conveniently located.
For reliable protection, the faceplate is closed with a square casing with one corner cut out. It is this area that is subject to sharpening.
A hole of the same diameter is made on the bottom surface of the table in the sharpening area as the hose of the vacuum cleaner. The presence of a vacuum cleaner is not fundamental, but it is desirable to install it. It removes unnecessary dirt from the blade.
What do you need to know?
Mounting the engine under the base of the faceplate is not a prerequisite. It is possible to make parts connect by means of a belt. In this case, the design will be difficult.
A do-it-yourself machine for sharpening knives of the jointer is also suitable for saws and axes.
Ice drill sharpening
The sharp knives of the ice drill enable the fisherman to quickly make holes in the water of the ice of water bodies. However, over time, any cutting tools become dull and require sharpening.
For fishermen, a quality ice drill is a great pride. Often, true competitions in the speed of drilling of ice holes are arranged on ponds. And the victory is not always smiling at young and strong fishermen who are armed with imported devices. There are times when experienced fishermen equipped with simple Soviet-made tools appear in the competition as the winner. The reason for the high drilling speed of the hole lies in the good sharpening of the knives and the correct setting of the device. Novice fishermen, having bought new Swedish devices, do not even have time to blink an eye, as their knives become dull. The smallest grains of sand and pebbles in the ice contribute to the formation of chips and potholes on the blade.
Sharpening devices is carried out in a variety of ways. Many of our ancestors did not know what a professional grinding machine was. In most cases, sharpening was carried out using hand-made devices.
Homemade ice drill machine: what will be needed to make it?
To make such a device as a do-it-yourself ice- grinding machine for knives , you will need two strips of steel, the thickness of which is 4 mm, the width is 60 mm, and the length is 200 mm. As a strip, the spring from the car is often used. But it bends very hard.
Working process
First you need to make the device case. Steel strips are bent so that the bevels of the knives pressed to the ends of the arc are not only parallel, but also are in the same plane.
After making an arc from the same steel strip, the pressure plate bends, serving as a clamp for sharpened knives
Holes for M12 or M14 bolts are drilled in the housing and pressure plate. Having pulled the case and the pressure plate by means of a bolt and nut, we clamp the knives between them and check the strength of their fit to the surface of the end face of the emery wheel.
If the knives are not located at the required angle (the chamfers do not fit exactly to the circle), then the device is finalized by bending the body arc to the appropriate level. If the knives are installed correctly, then the structure is disassembled, and stiffeners are welded to the body arc on both sides.
Knife sharpening is done better on an emery stone that rotates horizontally. In this case, when the knives are wetted with water, the latter remains on the blade and stone for longer, ensuring their safety. Dip knives more often in water. This will help to avoid overheating of the steel.
Minus device
The disadvantages of the device include the inability to sharpen knives with different angles of the cutting chamfer. But each manufacturer of ice drills offers its own models. In this case, a universal device is suitable.
Making a universal tool for sharpening an ice drill
The universal design allows sharpening knives at any angle of the cutting edge. By smoothly changing the angle between the arms of the unit, on which the knives are screwed, you can fix the desired position of the knives in relation to the plane of the grindstone.
To make this device, you need to find a door canopy with minimal backlash, as well as an M8 screw or M10 with its own nut. Holes are drilled in the shoulders of the canopy. Their diameter is 6-7 mm (for fastening knives to them by means of screws).
A steel plate with a thickness of 3 mm is used to make a fixing plate with a slot for the fastening screw. The plate and screw are welded to the shoulders of the canopy.
It happens that the sharpening of knives is made, the location of the holes of which does not correspond to the holes in the canopy. In this case, additional holes for knives of a non-standard type are drilled in the shoulders. In this case, the device has greater versatility.
How are planer knives sharpened?
Fixtures such as planers and planers can often be seen in country houses. Their raw lumber is brought to the desired state. The knives of these devices, like any others, are blunt. If you use them often, then the best way would be to sharpen your knives for a planer with your own hands. For the manufacture of grinding equipment at home, various materials will be required: metal, aluminum or wood.
The holder for knives can be made of a wooden bar. Having made a saw cut at 45 degrees through a circular saw, you can sharpen the knives with a belt grinder or a large bar. If the latter is not, then sandpaper is attached to a smooth surface of metal, wood, chipboard or glass.
Holders for knives can be made from improvised materials. The best solution is to use metal corners, which have an indicator of 90 degrees. When placing two knives on the sides, the sharpening angle of each will be equal to 45 degrees. Using screws, you can fix the knives in the second corner.