Device for sharpening knives with your own hands, drawings. About the device and the creation of a home-made machine for sharpening knives Drawing a knife sharpener with your own hands dimensions

The problem of blunt knives is familiar to many owners who are constantly forced to take kitchen utensils for turning masters. Meanwhile, solving it is much easier than it seems, because you can make a knife sharpener with your own hands, using the available tools at hand. This will save money on the purchase of a ready-made fixture or the services of professional workshops.

All about knife sharpeners

The easiest way to help owners get rid of the hassle associated with handing over knives to workshops is to purchase a whetstone. However, this option can become optimal only if it is possible to select a bar with the “correct” abrasiveness. To do this, you need to familiarize yourself with the main characteristics of the selected materials.

Choosing a quality stone

Whetstones, often referred to as stones, have their own classification, familiarization with which will help you choose the most suitable material. And if the owner manages to avoid the most common mistakes, then it can be used in the future as in independent form, and as the main component of a homemade grinder. So, distinguish the following gradations of granularity:

Another distinguishing feature of whetstones is their color, because the darker the shade of the selected stone, the greater the level of abrasiveness it will have and vice versa, bright hues testify to the fine granularity of the coating and its domestic purpose. It is worth noting that the performance of self-made sharpening directly depends on the choice of this element.

At the same time, it is recommended to pay attention to the quality of the chosen material, each of which has its own advantages and disadvantages. So, they distinguish between a bar of natural origin from slate and corundum rocks, as well as a stone for turning diamond and ceramic types. Among the disadvantages of the first option, it is worth highlighting the high granularity and rapid wear due to the need to constantly wet the surface of the stone to form a special composition that automatically increases the abrasive qualities of the device.

That is why it is better to leave your choice on artificial stone for sharpening, the length of which will exceed the length of the cutter blade, which greatly facilitates the procedure for its processing. In addition, you can choose a bar, the edges of which will have varying degrees of abrasiveness, which will allow you to carry out the procedure for the main and final sharpening at home.

There are several types manual sharpeners for knives with their own hands with a different design and degree of complexity in manufacturing. Naturally, the simpler the arrangement of such home appliance, the less comfortable will be its use in everyday life and vice versa, a large number of components allows you to create very comfortable models sharpeners, greatly facilitating the process of turning the blade.

This point should also be taken into account when determining the optimal fixture design. It is strongly recommended to take into account such an important indicator as the amount of work, because if the owner needs to process only a few kitchen cutters, then it hardly makes sense to choose a professional knife sharpener with drawings and three-dimensional modeling for making with your own hands.

In order to make a knife sharpener with your own hands, the following popular models can be taken as a basis:

Especially popular is a rather easy-to-make knife sharpener, the dimensions of which were developed well-known company Lansky. And this is the best option for self-design and further operation at home.

Self-production of a simple model

The principle of operation of the device according to the Lansky project boils down to the fact that the processing of a securely fixed blade is carried out at a strictly defined angle using replaceable whetstone nozzles with different grain sizes, as a result of which it is possible to obtain a very sharp edge of the cutting element. The finished device costs about 1,500 thousand Russian rubles, but the simplicity of its manufacture and minimum set the necessary details inspire craftsmen to create more budgetary home-made analogues from available improvised means.

Step by step master class

To the choice necessary materials it is worth starting after preparing the dimensions and drawings necessary for the manufacture of a home-made knife sharpener. To make this task as easy as possible, it is recommended to use finished projects, which can be found on almost any network resource. An example is an assembly drawing, according to which you can independently make a Lansky-type grinding machine.

In order to assemble such a structure, the master will have to prepare the following materials:

• A metal bar that can be used to make custom length studs marked M-6.
• Electrode of any brand, designed for use in electric welding. It is from this element that corner guides are made after complete cleaning of flux and burrs, which is carried out using granular emery.
• carbonaceous stainless steel with an average thickness of 3-5 millimeters, from which clamps with through holes are most easily made. It is worth noting that machine oil will be needed to make such holes, which treatment with concentrated soapy water will help to get rid of in the future.
• Metal corners of medium size (9 by 9 by 0.6 centimeters).

In addition, you will need nuts and other fasteners, the recommended markings of which can be found on the presented drawing. As for the processing of elements and their assembly into a single structure, this procedure involves the implementation of the following algorithm of actions:

It is not uncommon for certain imperfections of a home-made sharpener to be revealed during operation, although this is not a reason for frustration, because you can always make a correction, optimizing the operation of the device as much as possible and adjusting it to individual needs.

There are several important rules sharpening knives, which must be observed, regardless of how this procedure will be carried out. This refers to such subtleties and nuances:

• Perpendicular placement of the blade in the direction of the grindstone, subject to an angle equal to 1/2 of the sharpening value (the latter condition is not mandatory).
• The sharpening angle should vary between 20 and 25 degrees.
• Start processing from the beginning of the blade, from its most blunt part. In this case, the edge can be painted black so as not to protrude beyond its limits when turning the blade.

In the process of turning, characteristic transverse grooves tend to form on the edge of the blade. Their position relative to the base line of the cutting part must be perpendicular, because only then it will be possible to assert that the turning procedure was carried out correctly.

Do-it-yourself knife sharpening is a painstaking procedure due to the hardness of the products being cut, the frequency of use of the tool, and the thickness of the cutting edge.

The need for surgery arises regardless of the quality of the blade. How to do it at home? Let's try to figure it out.

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Why do you need to sharpen knives, can you do it yourself

Any hostess knows that knife sharpening is very important: working with a blunt tool is not only difficult, but also dangerous. The process slows down significantly and requires serious effort, as a result of which the muscles of the hand get tired quickly. In addition, the blade is capable of jumping off and causing injury at the most crucial moment.

You can carry the product to the workshop, where you will quickly sharpen it. But where is the guarantee that the work will be done correctly and the blade will not be spoiled? In addition, this service is far from free and requires a significant amount of time. And, sometimes, it is very lacking in preparation for the celebration, for example, in order to cook dinner on time. If the knife sharpening machine is at home, you don’t have to go anywhere. The quality will depend only on your skill, the tools and devices used.

Why knives lose their sharpness

No matter how high-quality the steel of the blade is, sooner or later any knife becomes dull. Why is this happening?

In the process of interaction with the material being cut, the cutting edge loses microscopic fragments of steel. At the same time, its shape changes, and the blade loses its sharpness.

In addition, this process causes deformation of the blade. When cutting products, we apply a force that almost always deviates in one direction or another. Of course, if this were the only reason, then it would not be necessary to sharpen knives so often. Another detail is important, the influence of which on sharpness is much more significant.

Maintaining the direction in accordance with the plane of the blade is almost impossible. As a result, the thin edge is slightly bent, and it becomes much more difficult for the knife to overcome the resistance of the material being cut. This process occurs especially quickly if the blade is made of low-quality steel.

There is a point of view that hot water can dull the blade. To some extent, this is true. In the process of contact with steel, salts dissolved in water react with the metal, causing a change in its properties far from better side. But such an impact is not decisive and has no serious significance.

Basic principles of knife sharpening

There are several ways to sharpen. The choice depends on the time you have, the purpose of the knife, the tools and fixtures available.

The general principles are:

• initial processing is carried out with a coarse-grained abrasive;
• subsequent grinding is performed with fine-grained material;
• leather or various pastes of varying degrees of abrasiveness are used for final finishing.

To facilitate the work can be used purchased or homemade device for sharpening knives.

At what angle should knives be sharpened?

The sharpening angle mainly depends on their purpose and, accordingly, the quality of the material from which they are made. What value of the sharpening angle should be for knives designed for various needs is indicated in the table:

In some cases, the angle can be reduced to 15º if the tool is used for a special purpose, such as slicing fresh baked goods.

Applicable materials

Do-it-yourself manual knife sharpeners can be made using bars of varying degrees of abrasiveness. The latter are conditionally divided into the following groups:

• the roughest one in this case not applicable (from 200 to 250);
• coarse - to form the profile of the cutting blade of the blade. If a visible defects not identified, such stones are not used (from 300 to 350);
• medium - as above, they are used infrequently, mainly for rough adjustment of the blade profile (from 400 to 500);
• small - the main type of stones used for sharpening knives (from 600 to 700);
• very small - used to bring an already sharpened blade to a mirror look.

These stones are made from various materials. A do-it-yourself manual sharpener can be made from natural and artificial bars. Natural - from natural stone(corundum, shale, etc.). Artificial - from synthetic materials or diamond. Moreover, natural ones wear out more strongly and do not differ in large grain size.

Before use, it is preferable to moisten the bars with water or soapy water.

Note: a bar should be used, having a length significantly exceeding the blade being sharpened.

In addition to abrasive bars, can be used:

• homemade devices that serve as their holder;
• sharpening machines for knives;
• mechanical sharpeners;
• musats - devices for finishing a sharpened blade and representing several metal disks nested one inside the other.

This list may be expanded. We have given only the main tools used.

Manual sharpening rules

In order to sharpen the cutting edge correctly, you must follow the specified sequence of actions:

1. on the initial stage we perform work with a bar of medium or large grain size, depending on the condition of the blade; it would be more correct to fix the bar from displacement;
2. determine the required sharpening angle; on each side of the blade, its value is half of the total; the main thing is to keep this angle unchanged;
3. movements should not be jerky; no significant effort should be made;
4. the initial move is carried out away from you, the edge must go along the entire length of the bar. Please note: when in contact with the bar, the blade must be directed at a right angle relative to the direction of movement;
5. in the place of rounding of the blade, it should be turned to maintain the desired angle;
6. at the end of the movement, the blade should not come off the bar, because this may cause it to become dull or damage the side surface;
7. then we move in the opposite direction;
8. we continue the sequence of these operations until a bent thin strip appears on the blade; checking for its presence, you can not run your finger along the blade, because you can easily get hurt on sharp edges; if the knife is sharpened correctly, this edge should be the same width on the entire blade;
9. turn the tool over and repeat the operations until a similar result;
10. we take a smaller donkey and sharpen further, but we no longer move on ourselves - only in the forward direction; since the grain of the bar is smaller, the amount of burr along the edge is also reduced;
11. we process the reverse side in the same way;
12. we repeat these operations on both sides on an even smaller stone; if the burr still remains, we remove it with the finest-grained bar; we remind you that the movements are still carried out in one direction - away from you; the pressing force is reduced towards the end of the operation.

Sharpening finished. It is also possible to finish the blade on a leather strip. Quite the old one will do belt.

How to make a homemade fixture

It is quite possible to make a machine for sharpening knives at home. Let's consider some of them.

Option number 1: the blade is fixed on a fixed platform

This device helps to sharpen the blade, providing the required edge angle. Below is a do-it-yourself knife sharpener. Drawings and drawings.

A homemade knife sharpener can be made in the same way as shown in the figure.

The principle of operation and design are clear. The manufacturing sequence is as follows:

1. the base can be chipboard or steel plate; it is marked and drilled under the stand and blade holder;
2. on the side of the base opposite to the rack mounting, a hole is drilled for the M8 bolt for attaching the knife clamp;
3. two M10 studs are made: one for the stand, the second for the holder for the abrasive bar;
4. a bracket is made for mounting the holder's stud on the rack (by drilling and bending a steel or aluminum plate;
5. brackets of the whetstone holder itself are made from two corners;
6. a clamp for the blade is made;
7. the structure is assembled in the form shown in the figure.

This device has one drawback: it is not able to provide a right angle between the movement being performed and the blade edge in the place of its rounding.

Option number 2: with a movable platform and a magnetic holder

This problem is solved by the following construction. It is performed in the same way, but a magnetic holder is used to attach the knife. Thus, it is possible to move the magnetic holder with the blade installed in it and turn it to the required angle. This knife sharpener is available with a base plate or can be attached to a table as shown in the photo.

It will greatly facilitate the process of sharpening knives.

How do-it-yourself planer knives are sharpened

Any man who has such equipment in the house has dealt with the sharpening of his knives. To do this, use special devices and abrasives. Of course, if the machine is often used, it is advisable to have the necessary device at home. Consider how to do it yourself.

How to make a machine for sharpening a planer knife yourself (step by step instructions)

To make a do-it-yourself grinder for straightening this knife, you will need to select the necessary parts:

• plan-washer;
• bed;
• electric motor;
• a vacuum cleaner;
• fencing.

Production is carried out as follows:

1. The electric motor is mounted directly under the bed; be sure to take care of the equipment with its control buttons "stop", "start";
2. A plan washer is installed on the output shaft, which is closed with a square fence with a cut groove;
3. On the lower plane of the table, a hole is made according to the size of the vacuum cleaner sleeve, the latter is designed to remove the dust generated during sharpening.

What you need to know

The electric motor may not necessarily be fixed under the base of the plan-washer. It is possible to use a belt drive, but this will complicate the design.

With this machine, you can also sharpen axes and saws.

Ice screw sharpening

The sharpness of the ice drill allows the fisherman to not make any effort to drill holes in the ice during winter fishing. But for this it is necessary to sharpen the knives of this device.

Sharpening methods are quite diverse. One of them is the use of a self-made tool.

How to make an ice drill machine with your own hands

Two steel strips 4 mm thick and 60x200 mm in size are required. Automotive spring steel can be used, but it is difficult to bend. Therefore, it is advisable to choose a different material.

Progress

First, the fixture frame is made. The strips are bent so that the knife chamfers, which are pressed against the edges of the rounding, are at the same level and are parallel to each other.

Then a clamp for sharpened products is made from another strip.

Holes are made in the plate and body. The clamping plate is bolted to the body, with the knives clamped. It is checked how tightly they fit to the surface of the end part of the abrasive wheel.

If the angle of the knives is incorrect, the device should be modified by bending the arc of the body. After making sure of the correct placement, we disassemble the fixture and weld the stiffeners to the body arc.

It is better to place the emery wheel horizontally, this ensures water retention on its surface. Cooling the knives with water will avoid overheating of the steel during sharpening.

Minus the device

The disadvantage of this machine is the impossibility of its use if the chamfers on the knives are located at different angles. Since various manufacturers of ice screws have different design, a universal fixture can be of great help.

Implementation of a universal device for sharpening an ice drill

It allows you to overcome the above obstacle. Adjustment of knives is carried out by screws, besides, the possibility of reliable fixation in different positions relative to the abrasive wheel is provided.

This device will require door hinge with a minimum stroke and an M8 screw with a nut. Holes up to 7 mm in diameter are drilled on the shelves of the canopy to secure the knives.

From metal strip 3 mm thick, a clamping bar is made with a groove for the clamping screw. They are boiled to the slats of the canopy.

Additionally, you can drill a few more holes, for greater versatility of the device, so that you can sharpen non-standard knives.

How to sharpen planer knives

This equipment is also widely used at home. It allows you to bring the raw lumber to the required condition. Naturally, sharpening knives for woodworking machines is periodically required.

To make the necessary devices, you will need different materials: steel, wood, etc.

The latch itself is made of wood. Grooves are made on it at 45º. Editing of knives is carried out by a belt grinder or an abrasive bar.

It is important to maintain the exact angle - this ensures the correct processing.

Sharpening with an electric sharpener

Equipment equipped with an electric drive greatly facilitates the work and reduces the duration of the process. But such devices require precision movements and experience.

Do-it-yourself electric knife sharpener is performed with an installed handpiece to support the product being sharpened, with the ability to adjust the gap between it and the abrasive wheel.

Note: must be equipped with a protective shield to protect the eyes from dust.

Processing is performed by the front surface of the circle. You can not use its side faces. The knife is installed on the handpiece with the cutting edge up and held along the axis of the product. The movement is carried out evenly, smoothly, without strong pressure.

After sharpening on both sides, the final refinement of the cutting edge should be carried out with fine-grained stones until the bend of the edge of the blade disappears completely.

Of course, a do-it-yourself knife sharpener can be made, but specialized sharpeners are offered for sale, which are absolutely safe and allow you to freely sharpen knives for any purpose.

To do this, after turning on the device, the knife is inserted into the desired slot and evenly drawn along it until the edge is completely sharpened.

These devices provide excellent sharpening quality. Their disadvantage is the inability to adjust the angle of the cutting edge.

Useful video: knife sharpener ideas

I wanted to learn how to sharpen knives, I won’t say that I didn’t know how to do it at all. He sharpened, of course, with his hands on the stones, and tried to withstand the angle, it seemed to work out - the knives shredded the paper.

I decided to take this process more seriously. And, as usual in Russia, do everything yourself from what is at hand, and even for nothing. We have such fans and I am like that. For such, in fact, the article.

I looked at sharpening machines on the Internet, settled on Apex. First of all, I looked for it on Chinese sites, there are, of course, copies and they were inexpensive (before the dollar exchange rate changed), now Chinese ones are too expensive for us. I looked at how it works, what are the nuances. Yes, it can be repeated.

Making Apex

Looking ahead, I’ll say that it didn’t work out completely for free, I still had to spend money, but not much. About 150 rubles.

Instead of a base, I took a 2 mm galvanized sheet. I bent it by eye (for some reason I guessed exactly 20 grams into the corner). Pinned on chipboard sheet. Instantly glued magnets from old hard drives, it took 3 magnets. I looked out for knife stops on the Internet, it’s convenient, it’s a great idea. I found a support for the hinge in the garage, it is threaded 8mm.

At first I thought about changing the angle with nuts, but I decided that the angle changes often and driving the nuts back and forth and locking each time so that there is no play would be inconvenient.

Where can I get a guide for stones? An old bed caught my eye, or rather a back, remember, probably, these were in the years of the USSR. Why not a bar from the back. I attached a square profile 25x25 mm to the bar (preliminarily polished). Remember there curly bushings. With their help (it took three pieces), in one you need to drill a hole up to 11 mm (rod diameter). I added a nut for 10 and a hairpin with a ball from the same bed, I got a comfortable handle.

Decided to sharpen sandpaper, there is such a method, it seems to be very budgetary and quite good. I bought several sheets of skins of different grain sizes. To avoid sandpaper remnants, I made the length of the square profile along the width of the sandpaper sheet 230 mm. I made a cut on the bar and drove an engraving washer of a suitable size there. Everything came together perfectly, as if it were intended for this.

I was afraid that it would be difficult to center the profile, but in this way, the profile itself fell into place. I glue the sandpaper on the stationery glue pencil.

Hinge for sharpener

I thought for a long time about this knot, how to make it so that there is no backlash. Thought to do it. I drove into a bearing store, it turned out that there are such AL supports (in my opinion, a sliding ball stands for). Available in sizes 10, 12, 15 inner diameter holes. But the stem is 11 mm. It's hard without a turner. But there was a way out. In the store, across the road, they sold spare parts for KAMAZ trucks, and there I found such a brass bushing for 10mm brake pipes. I bought ShS-12 (65 rubles) and a bushing (8 rubles). At home, I drove the sleeve onto the rod, it expanded remarkably with a hammer, rubbed it a little against the rod, as it was. I inserted it into the loop (with glue, just in case, to eliminate backlash) and flared it. Everything grew together again. There was a small backlash, in the AL itself, it Russian production and a little backlash (I went through a dozen in the store - all of them). I wanted to weld the AL to the fastening nut, but another idea came to my mind how to do without welding. I went to a plumbing store and bought pipe fasteners. It says 3/8” costs 27 rubles. I worked it up a little on sandpaper so that the working angle of the loop would not decrease. Next, with a stud with an 8 mm thread, I connected the clamp to a long nut and drilled a 9 mm hole in the right place of the long nut. The lamb was made from a purchased lamb for 5 rubles. Nuts and studs are the same for 8 mm.

When I assembled it (I clamped the loop into the clamp), the play disappeared, the clamp bolts compress the loop and the play goes away completely. It turned out better than welding. And it is easy to replace during production.

Oddly enough, all the details fell perfectly into place. I had to do a minimum of alterations. There is no backlash. Everything turned out to be very simple, I even made a second rod to polish the cutting edge.

According to the knurled, I spent half an hour on the second barbell. Glued on the edge:

• skin for goi paste
• clean skin
• wooden ruler with goi paste
• clean wooden ruler

I use them in different order.

I want to say that the idea was a success, in two days, I sharpened all the knives I could find. Angles can be measured with a household protractor, or a phone with an installed program for measuring angles

Compared to the manual method on stones, sharpening is much easier and sharper. Paper is cut, hair is shaved. I didn’t try to cut my hair, I think it’s excessive sharpness and it’s useless in life, although with due diligence you can achieve it.

Spent:

• ShS-12 - 65 rubles;
• brass bushing - 8 rubles;
• clamp - 27 rubles;
• lamb - 5 rubles;
• long nut - 5 p.;
• a sheet of sandpaper 240 - 2 p.;
• a sheet of sandpaper 600 - 2 p.;
• a sheet of sandpaper 1000 - 10 rubles;
• a sheet of sandpaper 2000 - 10 rubles..

Total: 134 rubles. The rest was found in the garage for free. And plus work with hands and head.

Too lazy to mess around, I found an inexpensive sharpener of the same type, the reviews are good, you can take it.

Also handmade.

Sharp knives for you.

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• knife sharpening;
• knife sharpener;
• homemade Apex;
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• sharpening machine.

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Sharpening video.

Every housewife at least once in her life faced with the fact that her knives were blunt in the kitchen, with which she usually cuts bread, butchers meat or cuts vegetables. Using such knives is not only inconvenient, but also dangerous, because the blade can break off the product and injure you. Therefore, it is necessary to periodically undermine the tool with the help of special devices. In stores, such devices are presented in huge assortment, but for certain reasons they do not suit consumers. In such a situation, a do-it-yourself knife sharpener can be made. Drawings and diagrams for work are, in principle, easy to find, but detailed master classes we present in this article.

What conditions must be observed when sharpening knives?

Do you know how to sharpen knives properly? In fact, there are a number of rules, following which you can achieve the perfect result.

The necessary conditions look like this:

• For long and efficient operation of knives when sharpening, it is necessary to pay maximum attention to the angle between the edges of the blade. During sharpening, it is imperative to restore the initially set angle so that it meets technological standards and allows you to cut products quickly, efficiently, freely.
• Need to pick up optimal angle for each blade. So, for example, a scalpel or razor should have an angle of 10-15 degrees, devices for cutting fruits, bread and vegetables - 15-20 degrees. Knives to work with hard materials you need to sharpen at an angle of 30-40 degrees.
• It is quite difficult to sharpen the blade without a special device. Holding the knife only with your hands, it is difficult to provide the desired angle of inclination. So it is precisely to facilitate this process that there are sharpeners.

In fact, a do-it-yourself knife is made as easy as shelling pears, because all such devices have simple design And it won't take you long to create them.

Varieties and manufacture of stones for sharpening

There are a large number of stones for turning knives on the market, but the most popular of them are the following types:

• Water tools. Working with them necessarily involves the use of water, thereby saving the surface of the stones.
• Oil stone. It is very similar in shape and structure to water, the only difference is that its surface is a little oily.
• Natural stones. They are produced from natural materials, previously undergoing industrial processing.
• artificial tools. They are made from non-natural ingredients.
• rubber devices. They are no less common on sale, but working with them is extremely inconvenient.

Before you make a knife sharpener in the form of an abrasive bar, you need to purchase several rectangular glass plates 4-5 mm thick.

Then make the sharpener according to the scheme:

1. Using double-sided tape, stick sandpaper to the surface of the plates different levels grit.
2. Tighten the nuts carefully so that the glass does not crack.

Important! During the operation of such a device, water is not used, which is why the abrasive wears out quickly enough.

When sharpening knives with an abrasive block, you should avoid too sudden movements, otherwise it will overheat and the blade will lose its beneficial features.

Products for sharpening knives made of wooden blocks

Making a sharpener from two abrasive and two wooden blocks is quite simple, the main thing is that the raw materials are the same size.

You will need to do the following:

• Carefully sand the wooden blocks with sandpaper, remove all burrs.
• Pre-mark the bars, taking into account the required angle of inclination.
• Attach a stone to the resulting line, on both sides wooden block note its width.
• Make cuts according to the markings on the wooden workpiece.

Important! Make sure that their depth does not exceed 1.5 cm.

• Insert the abrasive stones into the recesses obtained so that they coincide with the grooves.
• Fasten the grindstones with bolts, attach a piece of rubber from below.

Do-it-yourself knife from mounting corners

Use this master class to get a high-quality do-it-yourself knife sharpener. Drawings can be taken on the Internet.

Tools and materials needed for work:

• Metal plates 4 by 11 cm.
• Aluminum corners standard size.
• Metal rods 15 cm long.
• Grinding machine with vise.
• Needle file.
• A set of bolts and nuts.
• File.

Make a sharpener according to these instructions:

1. Make markings according to the drawing for the holes in the plates.
2. Drill holes, cut threads.
3. Round sharp edges and corners with a file.
4. Make holes in the corner according to the diagram.
5. Expand the needle support with a needle file.
6. Cut the threads in the holes for the studs.
7. Insert the rods into the extreme holes, fix them with nuts.
8. Screw the bolt into the widest hole with the nut pre-threaded onto it.
9. Insert bolts for clamping the knife into the remaining holes.
10. Screw the nuts onto the ends of the rods, lay the corner on top to fix the nuts.
11. Assemble a device to hold the sharpening stone from a thin metal rod, a wing nut and two holders.

Important! Such a sharpener can have the widest range of pressure angle degrees, it is incredibly convenient in terms of operation.

Making an electric knife sharpener at home

Do-it-yourself electric knife sharpener is made a little more complicated, because the device itself has a complex design.

Prepare the following materials and devices:

• A vacuum cleaner.
• Plan washer.
• Electrical engine.
• Stanin.
• Fencing.

Do the work, clearly following the scheme:

1. Attach the electric motor directly below the bed. In addition, it must be equipped with buttons to control the start and stop operation.
2. Install a plan washer on the output shaft, close it with a square fence with pre-cut grooves.
3. Make a hole on the bottom plane of the table, which would correspond to the size of the vacuum cleaner sleeve.

Important! The electric motor does not have to be mounted under the base of the plan-washer. You can use a belt drive, which slightly complicates the design itself.

Each owner will be happy to have such a homemade product that is useful for the home, because sometimes, by the sharpness of knives, they judge the owner .. There are quite a lot of methods and devices for blades. For example, it is enough to have either whetstones or carbide-tipped angular clearance devices advertised on TV. To trim expensive knives, Western manufacturers produce hard alloy bars (about 10 x 1 x 1 cm in size and in and at a price of 1500-2000 rubles). It is clear that it is difficult to call this sharpening, it is rather the removal of burrs on the blade. Of course, there are individual specialists who can make the perfect cutting edge without any adaptations, watch the video on YouTube. There are a lot of videos on this topic on the net and, the main task solved by these devices is to maintain the required angle and edge width when sharpening, but I propose to make a machine for sharpening knives with your own hands.

Correct smooth sharpening is achieved by moving the grinding element at the right angle and along the desired path on the curved part of the blade. For work, in most cases, they use bars with different grain sizes or sanding skins glued onto perfectly even and durable strips. The disadvantage of the bars is the development in the middle, which is regularly removed by editing and the high cost of the bars themselves.

For work, the device is attached with a clamp to the table. The desired angle is set by moving the slotted bar along the screw post. The blade being processed is fixed with two strips (in the second version, one five-millimeter plate was made with fastening with nuts and screws). To place the sanding paper, glass strips of ten-millimeter glass are used, glued in pairs with epoxy and a guide rod located between the strips. Photo of glass bars with glued skin and skin with GOI paste below without a rod.

The skin of a different number in the next photo.

The skin is cut into strips and glued with a weak solution of PVA or rubber glue. Processing proceeds sequentially - from coarse grain to fine grain with water or oil. The movement comes only from itself. When sharpening a very curved part, the location of the knife on the fixture must be changed to ensure the same width of the shiny edge. Before sharpening and further, for ease of control, you can paint over the edge to be sharpened with a permanent wide marker. With careful work, you should get such an edge.

The device is made of what it was-Glass cost 100 rubles. last year, a set of skins in 600 r. Since last year it has been used about 7 times for sharpening expensive knives. Photo of a modified clamp for massive knives.