The service life of any knife directly depends on the methods of its operation and the procedure for sharpening the blade. Devices for sharpening knives are so diverse that they allow to modern man do not resort to the work of specialists, but do all the work yourself at home. To sharpen knives, you can use either a special industrial device or any device made by with my own hands. It is important to know that simple elements for sharpening knives (for example, a whetstone), which are at hand, can do a bad job and the sharpness of the product will not only not return, but gradually the product will completely become unusable. Moreover, any homemade device for sharpening knives can be based on the use of these simple sharpening devices. Detailed information How to make a sharpening device with your own hands can be found below.
A homemade manual machine for sharpening knives, provided that all the requirements for its creation are met, will simplify the sharpening of knives and its performance will be no worse than that of a professional. Correct sharpening includes the following rule: each type of cutting product has a certain edge sharpening angle, which must be constant along the entire length of the blade (see table No. 1). A sharpening device that will initially be based on this principle will give the craftsman a sharp knife edge for a long time.
Table No. 1. Sharpening angle in parallel with the type of cutting device
When sharpening the edges should be processed evenly. To fulfill this condition, the following rules must be observed:
- the blade must be fixed in the vice of the device reliably and efficiently, without exposing the metal of the blade to damage;
- the movement of the touchstone along the axis of the knife edge must be uniform and strictly at a certain angle;
- the point of contact of the blade must be strictly perpendicular to the longitudinal axis of the sharpening device;
- the pressure on the knife blade should change smoothly depending on the change in the area of contact between the blade and the sharpener.
A simple device for sharpening knives
The simplest device for sharpening knives is based on the use of an angular frame and a whetstone. The price of such a primitive factory-made device is quite high, as is the price of replaceable whetstones, but making such a device for sharpening knives at home will not be difficult for a craftsman. You will need the following equipment:
- Wooden blocks of the same size - 4 pcs.
- Drill (or any other drilling tool).
- Bolts and nuts (about 4 pieces each).
- Touchstone.
- Protractor.
First you need to make a pair of wooden corners, placing the bars to each other strictly at an angle of 90º (Fig. 1). Close the resulting wooden corners together parallel to each other as a single whole and drill holes through the diameter of the bolts. Insert bolts into the holes and tighten the corners slightly with nuts.
The point of this invention is that it is possible to sharpen simply by holding the knife vertically in relation to the sharpening surface located at a given angle.
The most important thing is to properly secure the touchstone between wooden corners devices. To do this, using a protractor, you need to set the desired angle of inclination of the touchstone and tighten the bolts tightly to clearly fix the position of the touchstone.
With some modification of the device, you can also fix the position of the knife relative to the sharpening stone. Significant disadvantage similar machine for manual sharpening impossibility appears smooth adjustment angle of inclination of the grindstone.
Device for sharpening from mounting angles
The diagram and drawings of a homemade knife sharpener made from mounting angles, based on a Lansky device, are clearly shown below.
To assemble this device you will need:
- Metal corners 90*90 mm with a wall thickness of 6 mm.
- Stud with M6 thread and length 160 mm.
- Thin rod (electrode, knitting needle, etc.).
- Touchstone.
- 2 rectangular pieces of metal (sponges for clamping the whetstone).
- Pliers.
- Hacksaw for metal.
- File (or any other tool for processing sharp corners).
- Set of hardware (nuts and bolts).
In both metal jaws, intended for fixing the keystone, you need to drill for the connecting bolt. Fix the touchstone. A thin smooth knitting needle, previously bent at an angle of 90º, must be inserted and secured in the hole of one of the jaws. In the future, using this lock in the form of a knitting needle, a certain angle of inclination of the touchstone will be set. Such a device for sharpening knives is characterized by a wide range of sharpening angles, which will undoubtedly be of interest to most craftsmen.
Locking blade machines
Knife sharpening machines with locking blades will attract the attention of those people who want to sharpen a knife not only efficiently, but also quickly. The design, which rigidly fixes the knife blade relative to the sharpening stone moving at a set angle, allows you to accurately set the angle of inclination.
To create such a homemade machine with your own hands you will need:
- The base is a rectangular wooden plate with dimensions 440*92 mm and a thickness of 18 mm.
- Wooden die 92*45*45 mm (for fixing the vertical threaded rod).
- A wooden block 245*92 mm and 18 mm thick (the plate to which the knife will be attached).
- Iron plate 200*65 mm and metal thickness 4 mm.
- Piano hinge, 92 mm long.
- M8 hairpin 325 mm long.
- Nuts and bolts with M8 thread.
- Drill 6.5 mm.
- M8 tap.
- Self-tapping screws 50 mm, 4 pcs.
The die intended for fixing the vertical threaded rod must be drilled through with a 6.5 mm drill. The hole should be located at a distance of 15 mm from the edge of the die, approximately in the center.
Next, in the resulting hole you need to cut a thread for an M8 stud. The wooden block prepared in this way must be screwed to the base at a distance of 265 mm from the edge using ordinary self-tapping screws 50 mm long, screwed into the back of the base.
After securing the wooden part of the holding device, you can begin to attach the iron plate. In the center of the 200*65 mm plate, you need to drill an oblong groove, 90 mm long and about 1 cm wide. The groove should be located from the edge of the clamping plate at a distance of 60 mm. Additionally, you need to drill a hole at a distance of 20 mm from the opposite edge and cut a thread in it for an M8 bolt. Then you need to attach the clamping plate to the previously prepared wooden base. Using another bolt and a suitable washer, you need to fix the clamping plate in the center of the cut groove. The fixation should be clear, but at the same time careful so as not to damage the surface of the blade.
The most difficult part of assembling this device is preparing the control device that will set the sharpening angle of the knife. For this you will need:
- metal square profile 40×40 mm;
- furniture bracket, 40 mm wide;
- a pair of rivets;
- a piece of plywood 42×25 and 18 mm thick;
- bolt and nut M5;
- a pair of M8 wing nuts;
- whetstone;
- steel bar with a diameter of 0.8 cm and a length of 40 cm.
It is necessary to drill a couple of holes on a piece of plywood: a through hole with a diameter of 8 mm along a cross-section of 42×18 mm (the distance from the edge on the 42 mm side should be set at 15 mm) and a through hole with a diameter of 5 mm along the side with a cross-section of 42×25 mm (the distance from edges 10 mm). Square pipe should be cut in half so that you get a “U”-shaped bracket with a width of 40 * 15 mm and ears of 20 mm. You need to drill 8 mm holes in the ears, into which an M8 pin will later be inserted. Connect the resulting bracket with furniture hinge using rivets. Using the second part of the furniture bracket, attach a block of plywood to the resulting structure with an M5 bolt.
Connect the touchstone to a guide rod, which is a steel rod with a cross-section of 8 mm. When connecting the keystone and the guide rod, you should strictly ensure that their center lines coincide. If desired, for ease of use of the sharpener, a handle-holder can be attached to the whetstone on the reverse side. All that remains is to secure the whetstone in the guide mechanism, secure it with a thumb and the homemade device for sharpening knives is ready.
Machines with fixed sharpening surfaces
Machines with fixed pointed surfaces are simple modification devices for processing household knives. In such a device there is no possibility of adjusting the sharpening angle; however, several different angles for sharpening can be set in advance different types knives. The work of sharpening blades using such machines is not difficult; you just need to move the blade along the abrasive surfaces in the recess.
The device consists of a pair of planes inclined to each other at a certain angle, one of which is a grindstone.
Electric knife sharpeners
The procedure for creating an electric sharpening machine is simple: it is enough to equip almost any device for sharpening knives and scissors with an electric drive. Such a sharpening machine allows you to quickly and efficiently sharpen the product and at the same time provides a better concave shelf at the edge of the blade.
The mechanism of an electric sharpener for sharpening knives contains a guide, which is located along the axis of rotation of the sharpening stone, and with the help of which the blade is adjusted at a given angle. The sharpening angle is set and set by the guide, and the clamping force is determined by the master.
Particular attention must be paid to the speed of sharpening, because... The electric drive allows you to sharpen the product at high speed, as a result of which the surface of the knife heats up. Such surface heating leads to tempering of the hardened steel, as a result of which the knife can quickly lose its hardness and its service life will be noticeably reduced. To prevent tempering of the steel, sharpening should be done on a high-speed electric sharpener in short periods of time and with sufficient breaks to allow the knife to cool.
Making sharpening stones
It will not be difficult for a modern craftsman to make sharpening stones with his own hands. For this you will need:
- a wooden die to the size of the future sharpener;
- epoxy resin;
- cardboard boxes according to the size of the block;
- abrasive;
- protective rubber gloves.
You can use ready-made powder as an abrasive, or you can prepare an abrasive own production, for example, from an old block green still of Soviet production. Such a block can be ground into powder and used in the future as an abrasive.
The wooden die needs to be treated on one side with sandpaper and frequent cuts must be made with a saw. Mix epoxy resin with abrasive chips. Having previously placed the block in a cardboard box glued to the size of the block, cover the prepared surface wooden block mixture epoxy resin and abrasive. Once the resin has completely cured, the block is ready for use.
Another option for making your own sharpening stones is to create a sharpening stone from small rectangular glass plates about 5 mm thick. Using double-sided adhesive tape, sandpaper is glued to the surface of the glass plate. The sharpening stone is ready for use.
Device for sharpening from wooden blocks
A simple device for sharpening knives is a tool consisting of a pair wooden slats and pairs of bars with abrasive, with the same geometric dimensions.
Wooden slats should be thoroughly sanded with abrasive sandpaper. Then, after applying auxiliary markings, depending on the sharpening angle of the knife, make cuts to a depth of 15 mm. Insert sanding blocks into the resulting holes so that each groove matches, then secure them with bolts. To give the sharpening device greater stability, the lower part of the surface can be padded with a piece of rubber.
The types of devices for sharpening cutting tools are different and each master will be able to choose the manual machine that will fully satisfy his needs.
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Regardless of what guarantee the knife manufacturer gives that they will not require sharpening during use, sooner or later this question will still arise before the user. It doesn’t matter whether this applies to kitchen utensils or camping accessories, because... A sharp knife is the key to success in fishing and hunting, while traveling and when cooking. Devices for sharpening knives - types and rules of use, as well as how to make them yourself - this is the topic of today’s review by the site’s editors.
The simplest device for sharpening a cutting tool is a block, and the device for its use is a clamp for the angle of the surface being sharpened
Knives can be classified according to the following indicators:
Whetstones and whetstones
A whetstone (sharpening stone) is an abrasive tool used to sharpen cutting edges household appliances and kitchen utensils, carpentry and plumbing tools.
The industry produces four types of stones for sharpening knives:
- natural– novaculite and Japanese water stone are different at a high price and difficulty of use;
- diamond– the most popular type of product, it is distinguished by its diversity in both geometric dimensions, and by grain size. They are characterized by wear resistance and efficiency of use, as well as low cost;
- ceramic– modern type sharpening tool, is distinguished by its combination positive qualities natural and diamond analogues;
- artificial– well-known types of electrocorundum or carbide are low in cost, but during use they crumble and are not suitable for finishing cutting edges.
Hand tools
- Must for sharpening knives.
Almost everyone knows what musat is, but many don’t even suspect that this is the name of this product. The reason for this is that musat, as a rule, comes with sets of knives offered for sale through trade organizations.
Musat is a rod made from various materials, equipped with a handle and characterized by the roughness of the working surface.
The roughness of the drawing is the size of the notch applied to the rod, and it is this that determines the degree of roughness of the cutting surface of the knife after processing. The musat is equipped with a rod with a certain degree of magnetization, which ensures that metal particles formed during use reach food and kitchen utensils. Musats are classified according to:
- rod shape– round and oval, flat and tetrahedral;
- materials used– ceramics and metal, diamond and mixed designs.
Each type has certain advantages and disadvantages that determine the possibilities of using the device and its purpose.
- Manual machines.
Household manual sharpening machines for sharpening knives differ in their design, but in any of them the main element is a whetstone or a sharpening stone. The impact of the abrasive tool on the cutting surface is carried out using the efforts exerted by the user. The main task performed by a manual machine is to create and maintain an optimal sharpening angle of cutting edges for the entire period of work, which is achieved by rigidly fixing the knife in given plane. Produced by industry various models similar equipment, differing in size and methods of fastening abrasives and knives being processed, as well as the materials used and cost.
Household electric sharpeners do not take up much space and are very functional, because... their design, as a rule, provides various fixed sharpening angles for different types knives and other cutting tools (scissors, screwdrivers, etc.). The ability to quickly and efficiently sharpen the cutting edges of knives is very important for enterprises catering, where the speed and quality of cooking depends on sharpening. Professional machines for sharpening knives - these are functional devices equipped with an abrasive tool high quality execution, allowing not only rough sharpening, but also fine-tuning the cutting edges of knives for various purposes.
Professional models, in addition, as a rule, have several operating modes that allow sharpening with different efficiency, necessary for knives made of different metals or ceramics.
How to properly sharpen a knife at home
Everyone knows that a knife must be sharp, and for this it needs to be sharpened, but how to do it correctly is often not known to every user. It should be noted right away that in order to carry out the work correctly it is necessary:
- Know the sharpening angles for each type of knives and other cutting tools.
- Be able to work for various equipment or using available equipment.
Sharpening angle of knives for various purposes
For knives used for various purposes, the sharpening angles of the cutting edges are different, which is determined by their purpose and nature of use.
This value is for:
- table knives - 55–60˚, because ready-made dishes are quite soft and easy to cut; moreover, with a smaller sharpening angle, there is a possibility of damaging the dishes during eating;
- hunting and folding models – 40−45˚, which is explained by their versatility;
- kitchen knives – 30−35˚;
- used for professional cutting of vegetables - 35˚;
- used for professional cutting and deboning of meat – 25−30˚;
- used for professional fish cutting - 25˚.
Some types of knives are sharpened with different sharpening angles, such as those intended for slicing bread (the angle is 15˚), but this is a narrowly targeted use in which sharpening must be done quite often, because with a decrease in this indicator, the durability of the cutting edges decreases.
How to sharpen a knife at home with a whetstone
In order to properly sharpen a knife using a whetstone, you must follow several rules for performing the work:
- must be selected optimal angle sharpening corresponding to the purpose of the knife;
- the blade must be positioned in relation to the plane of the block strictly within the specified sharpening angle parameters for the entire period of work;
- Sharp and jerky movements should not be allowed, they should be smooth and sliding;
- When performing work, the block should be moistened generously with water diluted with soap or detergent.
How to sharpen using musat
The process of sharpening a knife using musat is shown in the following figure.
The work is carried out as follows:
- musat is installed on flat surface strictly in a vertical plane;
- the upper part of the device is combined with the sharpened edge of the knife near its handle, after which the knife moves along the rod of the grinder in an arcuate movement directed from top to bottom;
- the movements are repeated several times on both edges of the knife.
I would like to note that experienced users can perform this operation in weight, without rigidly fixing the rod of the device used.
How to properly sharpen a knife on an electric sharpener
When using models equipped electrically driven, basic requirements for the performance of work that allows correct sharpening, are the same as in the case of using a whetstone or whetstone.
But, besides this, there are additional requirements that can be formulated as follows:
- It is not the abrasive that should be moistened with water, but the surface of the knife being processed, which is explained by the fact that water is not retained on a rapidly rotating wheel;
- the blade must not be allowed to overheat, which can lead to damage that occurs when the edges being processed are strongly pressed against the abrasive surface;
- to rigidly fix the sharpening angle, additional devices can be used that are mounted rigidly to the body of the sharpening machine or are in the user’s hands;
- When working on industrial sharpening machines, it is necessary to use personal protective equipment, such as gloves and safety glasses.
When using small devices intended for home use, the main requirement for sharpening is the time required to complete the operation; all the rest (fixation of the sharpening angle, protection, etc.) are performed by the machine itself, according to its design.
Typical mistakes when doing DIY work
When sharpening knives on their own, many users allow typical mistakes, which can be formulated as follows:
- Creating an incorrect sharpening angle prevents the knife from being used for its intended purpose or reduces its functionality.
- Excessive pressure when working on electric models or incorrect direction and nature of movements when using a whetstone or sharpening stone contribute to damage to the surface of the knife and destruction of its edge.
- Sharpening the cutting surface without first cleaning it from dirt and foreign substances leads to the abrasive becoming washed out and damaged.
- Using only one grinding stone when sharpening cutting edges. This device is intended only for finishing or straightening knife blades; it is not intended for basic sharpening.
- Failure to complete the sharpening operation again leads to rapid dulling of the cutting edges.
- Using an abrasive (whet stone or whetstone) of only one grit size.
Making a machine for sharpening knives with your own hands
Although nowadays you can easily buy the necessary tools and equipment designed for sharpening knives and other cutting tools, nevertheless, handicraft citizens continue to make knifes with their own hands in their free time. When making a knife sharpener with your own hands, you need to decide on its type (manual or electric) and the type of abrasive materials used (block, wheel, sanding belt), as well as the available materials that will be used to make the body of the assembled device and its frame. Let's consider the option manual sharpener using an abrasive stone and plywood as the frame of the structure. Appearance The assembled device is shown in the following figure.
IN household There are always cutting, sawing and planing tools. During the work, the sharpness is lost, and the blades have to be restored. You can give knives and planes to the workshop, but this costs money and goes away extra time. Therefore, home craftsmen prefer to sharpen the tool.
Important! Only blades with a certain degree of hardening can be sharpened. If the cutting part has a hardness above 55 HRC, it cannot be sharpened with improvised tools.
You can buy a device for sharpening knives or other household utensils at the store. Save time, but spend a considerable amount - good sharpening are expensive.
By the way, there are different opinions about what the knife sharpening device is called. Emery, whetstone, whetstone, sharpener, musat...
Can these definitions refer to the same item or different products? We will talk about this and how to make such a device yourself in the article.
Since the advent of cutting objects (weapons, knives, axes), man has been looking for a way to restore the sharpness of the edge. In the Bronze and Copper Ages it was easy.
Knife sharpening device - necessary thing in every home. Of course you can buy sharpening machine industrial production. But you should keep in mind: the scissors that are sold in specialized stores are quite expensive and often fail.
Construct a simple sharpening machine you can do it yourself. This sharpener does not take up much space and is very easy to use. If you don’t want to make something, you can use a regular sharpening stone. However, a knife sharpening machine is still great idea, after all the simplest machine It will always come in handy, and you can sharpen other tools on it.
Why do knives get dull?
In some houses there are knives They remain sharp for a long time and there is no need for sharpening. And for some owners, on the contrary, they become stupid every now and then. Why is this happening? Here are the most common reasons:
DIY machine
In the old days, sharpening machines were rare. When a sharpener came to a village or town, all the local residents brought him their knives, scissors and other cutting tools. In those days, the machine was a circle on which a knife was placed in a horizontal plane. The circle rotated and the blade became sharper.
Until now, many owners who take care of their knives sharpen these objects in a horizontal position, using a special whetstone. It's made from abrasive material, and the blade, in contact with the block, restores its sharpness. If you don't have a sharpening machine, this method can be used. However, sharpening knives in a horizontal position is very inconvenient, especially if you do it while hanging. In this regard, many home craftsmen make their own sharpening machines. Here are the main advantages of such a machine:
Operating principle of the device
Here's how a simple sharpening machine works:
To sharpen on such a machine, you do not need to apply any physical effort, and good result is achieved very quickly. The risk of injuring your hand is reduced to zero.
Once the blades are sharpened, the question arises of how to properly use and store them. Many housewives, after washing their knives, do not wipe them dry with a towel, but simply put them in a heap in the dish drainer so that the water drains from the cutting tools. Under no circumstances should you do this. When undried, wet knives lie on top of each other in a horizontal position, they quickly rust and become dull.
Therefore, together with a sharpening machine, it makes sense to design a special device for storing knives. This device is a wooden stand with slots in it. various sizes. Blades are inserted into these slots with the blade facing down. This way, the cutting tools do not come into contact with each other and the blades are always dry. In order to remove the knife from the “socket”, you just need to gently pull its handle.
Correct use of knives
Of course, sharpen knives homemade machine- a pleasure. It's nice to watch how a dull blade becomes sharp and begins to shine. However, no one likes to do extra work. Therefore, in order to sharpen them less often, you need to properly care for them. Here are some useful tips:
Acuity kitchen appliances largely depends not only on the quality of the product and the metal from which the blades are made, but also on storage conditions. Even the most good knife It will quickly rust if you constantly keep it in water and store it horizontally with other kitchen utensils.
Proper sharpening of knives is of great importance not in everyday life. When the blade is well sharpened, working with it is easy and pleasant. But the main thing is that it is much more difficult to get injured with a sharp knife than with a dull one. Sharpening knives on a homemade machine will not take much time and effort, but after that the cutting tools will become as good as new. Sometimes homemade sharpening machines are even used in cafes and restaurants to make the work of chefs easier. But you can also use an ordinary block, because it all depends on your desire and capabilities.
Every housewife at least once in her life has encountered the fact that the knives with which she usually cuts bread, butchers meat or chops vegetables become dull in her kitchen. Using such knives is not only inconvenient, but also dangerous, because the blade can fall off the product and injure you. Therefore, it is necessary to periodically sharpen the tool using special devices. In stores, similar devices are presented in huge assortment, but for certain reasons they do not suit consumers. In such a situation, you can make a knife sharpener with your own hands. In principle, it is not difficult to find drawings and diagrams for work, but detailed master classes we will provide in this article.
What conditions must be observed when sharpening knives?
Do you know how to sharpen knives correctly? In fact, there is a whole series rules, following which you can achieve an ideal result.
The necessary conditions look like this:
- For long and efficient operation When sharpening knives, 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 specified angle so that it meets technological standards and allows you to cut products quickly, efficiently, and freely.
- It is necessary to choose the 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 for working with hard materials need to be sharpened at an angle of 30-40 degrees.
- Without a special device, sharpening a blade is quite difficult. Holding the knife with your hands only makes it difficult to achieve the desired angle of inclination. So, it is precisely to facilitate this process that sharpeners exist.
In fact, making a knife with your own hands is as easy as shelling pears, because all such devices have simple design and it won’t take you much time to create them.
Types and production of sharpening stones
There are a large number of stones available for sale for sharpening knives, but the most popular types are the following:
- 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 slightly oily.
- Natural stones. They are made from natural materials that have previously undergone industrial processing.
- Artificial tools. They are made from non-natural components.
- Rubber devices. They are no less often found on sale, but working with them is extremely inconvenient.
Before you make a knife in the form of an abrasive bar, you need to purchase several glass plates 4-5 mm thick, rectangular in shape.
Then make a sharpener according to the scheme:
- With the help double sided tape stick sandpaper on the surface of the plates different levels graininess.
- Tighten the nuts carefully to prevent the glass from cracking.
Important! During the operation of such a device, water is not used, which is why the abrasive wears out quite quickly.
When sharpening knives with an abrasive stone, you should avoid too sudden movements, otherwise it will overheat and the blade will lose its useful properties.
Products for sharpening knives made from wooden blocks
Making a sharpener from two abrasive and two wooden blocks is quite simple, the main thing is that the starting materials are the same size.
You will need to do the following:
- Thoroughly sand the wooden blocks with sandpaper, removing all burrs.
- Pre-mark the bars, taking into account the required angle of inclination.
- Place a stone on the resulting line and mark its width on both sides of the wooden block.
- 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 resulting recesses so that they align with the grooves.
- Secure the sharpening stones with bolts and attach a piece of rubber to the bottom.
Do-it-yourself knife from mounting corners
Use this master class to make a high-quality knife with your own hands. You can get the drawings on the Internet.
Tools and materials required for work:
- Metal plates 4 by 11 cm.
- Standard size aluminum corners.
- Metal rods 15 cm long.
- Sharpening machine with vice.
- Needle file.
- Set of bolts and nuts.
- File.
Make a sharpener according to these instructions:
- Make markings according to the drawing for the holes in the plates.
- Drill holes, cut threads.
- Round off sharp edges and corners with a file.
- In accordance with the diagram, make holes in the corner.
- Use a file to widen the spoke support.
- Tap the holes for the studs.
- Insert the rods into the outer holes and secure them with nuts.
- Screw the bolt into the widest hole with the nut pre-screwed onto it.
- Insert bolts to clamp the knife into the remaining holes.
- Screw the nuts onto the ends of the rods, and place a corner on top to secure the nuts.
- Using a thin metal rod, a wing nut, and two holders, assemble a device to hold the sharpening stone.
Important! This sharpener can have a wide range of degrees of pressure angle; it is incredibly convenient to use.
Making an electric knife sharpener at home
Making an electric knife with your own hands is a little more complicated, because the device itself has a complex design.
Prepare the following materials and devices:
- Vacuum cleaner.
- Plan-puck.
- Electric motor.
- Stanin.
- Fencing.
Complete the work strictly following the diagram.
