Such a device cannot be called a machine (in the full sense of the word). However, in the household, a thing is necessary, and sometimes simply irreplaceable. The device is so simple that anyone can assemble a sharpening machine with their own hands.
First, we need to decide for what purposes this machine is needed, and what we will sharpen - knives or something else. Depending on the diameter of the grinding wheels that will be used, the engine power is also selected. All articles on the Internet recommend using an engine from an old one. washing machine. This is the basis of the entire machine. However, you need to understand that no matter what mechanism the engine is used for, its power of 1 - 1.5 kW will be quite enough for domestic use.
How to assemble the machine
- a support (platform) for the engine is selected. It must be securely fastened, since when it is turned on, the rotor develops quite high speeds. It is recommended to fasten using bolts with a diameter of at least 8 mm. The location of the motor should take into account the ease of using the machine and replacing the grinding wheel;
- It is better to make the connection through a magnetic starter. It is assumed that the power supply is single-phase 220 V. It is necessary to calculate the correspondence between the engine power and the one suitable for the outlet. It is better to supply power directly from the circuit breaker via a separate line.
- The main problem is how to secure the emery wheel to the motor shaft. Circles are different, and the diameters of its hole and the motor shaft may not match. In this case, you will have to select a bushing and place the stone on it. On the shaft it is necessary. No matter how the circle is attached to the rotor, with or without a bushing, it must be fixed;
- installation over stone protective casing. It is made of thin sheet iron or thick plexiglass on a special holder.
The procedure for assembling the sharpening machine
Nut - washer - whetstone - washer (if a bushing is installed, then one of its edges plays the role of a second washer) - nut (tightening) - another nut (fixing).
Particular attention should be paid to connecting the starter - they can be different designs. We need it to have at least three normally open (NO) contacts. Its winding is connected to the phase line through two series-connected buttons. One is with normally closed contacts (NC), the other is with NO. The button with HP contacts will be a button. “On”, respectively, the second is “Off”. Book “On” is placed in parallel with one pair of NR contacts of the starter.
When you press the button. “On” voltage is applied to the winding and the starter contacts close. One pair of them shunts the book. “On”, and when it is released, the voltage from the starter is not removed. By pressing the button “Off”, we break the power supply circuit of the winding, the starter “releases” the contacts, and the engine stops. As you can see, there is nothing difficult in making this useful device for the household.
Almost everyone home handyman in stock cutting tools. Over time, the cutting edges lose their former sharpness, and working with such a product becomes unbearable. There are two options for solving this problem: have the tool sharpened and pay a lot of money, or assemble a knife sharpening device yourself and sharpen the products yourself.
Causes of blade dulling
The dulling of the blade can be explained as follows. During cutting, the blade is exposed to tiny abrasive particles, be it fruits or vegetables. The cutting edge of the blade gradually wears off and the knife becomes dull. Another reason is to hold the blade when cutting at a certain angle.
Some areas of the blade are subject to increased stress and increased wear.
There are types of knives that are impossible to sharpen yourself due to the textured blades. Also, knives made from ceramics cannot be sharpened. But, as a rule, the quality of the steel in such products is high, and they rarely become dull. There are a variety of knives low quality, and they have to be sharpened very often. As practice shows, if the steel is of poor quality, then sharpening will solve the problem for a while, and then the blade will become dull again.
To sharpen knives you will need abrasive wheels. If it is not possible to purchase ready-made circles, then you can make them yourself using wooden blocks and sandpaper of different grain sizes.
The standard sharpening angle is 20 - 30 degrees. It is quite difficult to maintain the angle during sharpening, and therefore it is necessary to make a simple knife sharpener, in which it is not necessary to maintain the optimal angle. The basic rule in this process is maintaining a precisely specified constant angle. No force required here. The main thing is that the block and blade meet at a certain angle. This is the basic rule of the sharpening technique.
Basic mistakes
As it may seem at first glance, sharpening is simple, but if you delve into the process itself, you will notice quite large number various nuances. Most people make simple mistakes when sharpening knives, which leads to uneven sharpening or damage to the knife. Common Mistakes when sharpening:
- The cutting edge was not sharpened. As a result, small burrs form on the sides, which temporarily give sharpness to the blade, and after working with the knife for a short time, the blade again becomes dull. To prevent this problem, you should carefully sharpen both edges, and then, as you sharpen, use sandpaper or a wheel of different grits.
- Presence of paint, oil, dirt on the tip. The bottom line is that when turning, grease, dirt, oil and other components mix with grinding abrasives and lead to scratches and microchips of the blade. After such sharpening, the blade quickly becomes dull.
- Pressure plays an important role. You need to remember one simple rule: sharpness does not depend on the force used, but on the duration of sharpening. Excessively strong pressure leads to chipping of microparticles from the blade and poor sharpening.
- Incorrect angle selection. The angle may vary depending on the grade of steel and the purpose of the tool. For home kitchen knives it is 20 - 25 degrees. For other types of blades that will have to withstand heavy loads and work with hard materials, the angle will be 40 degrees.
By following simple but at the same time appropriate rules for sharpening, you can not only save time, but also not damage the product.
Sharpener "Domik"
A good tool for sharpening knives. Despite simple design, the sharpener does its job well. This design consists of a rectangular block, the upper edge of which is made in the form gable roof. The angle of inclination of one face is 20 - 25 degrees, which is optimal. The product must be installed with a blade close to one of the roof ridges, then take an abrasive wheel or a block with emery and move along a horizontal line. This ensures a constant angle of inclination, which leads to uniform sharpening of the blade.
There are also complex designs homemade grinding machine. For manufacturing you will need the following materials:
- A piece of board measuring 500x150x20 mm.
- A metal pin with a thread that will serve as a guide for the bar.
- M8 bolts and nuts and wood screws.
- Clamp nuts or wing nuts.
- Ordinary PCB or plexiglass, which will serve as a substrate for the knife and a kind of movable frame.
- To attach the knife you should take neodymium magnet. The usual one will not work, since its downforce is quite low.
The board must be cleaned, processed, and then made into a rectangle. Another board should be made rectangular in shape, which will serve as a stand or support. Its height should be such that the slope of the main board is 20 degrees. You can fasten them together with wood screws. Then attach the resulting structure to the workbench or cut out a tabletop in advance, to which one of the studs will be attached. After securely attaching the pin to the tabletop, you need to take a 200x100 block and make two holes in it: one for the main pin, on which the movable carriage with the sharpener will be attached, and the other for the pin, which is attached to the tabletop.
Now you can begin assembling the carriage with the sharpener holder. For the pin that will hold the carriage, you need to make two clamps from wood, plexiglass or metal. Drill holes in the clamps, put them on the stud and secure them on both sides with nuts. The carriage will rotate freely along its axis.
The next step is to install a neodymium magnet on a previously prepared plate. It is necessary to make a longitudinal groove in it so that the tripod can be moved up and down. Drill a hole in the middle of the frame and insert a bolt with a nut, which, in turn, will press the plate. You can simply glue a neodymium magnet to the end of the plate to hold the knife.
The homemade device is ready for use. It can be used to sharpen chisels and planes.
It should be noted that sharpening is carried out without water, so the abrasive paper or wheel will wear out greatly, but this option is quite suitable for sharpening knives and tools at home.
Homemade knife
If the farm has sharpening machine, it will make the process easier, but there is one circumstance. When sharpening on a machine, it is almost impossible to apply even pressure on the knife. Therefore, it is possible to make a device for sharpening knives, which will serve as a guide for the blade and ensure uniform pressure. The result is a simple but effective electric sharpener. To make it you will need the following components:
- Beam.
- Four bolts or four studs with M8 thread.
- Four lambs.
- Self-tapping screws for wood.
Opposite the electric sharpener, a guide is attached along which the slider will move. The guide itself can be attached to the workbench or a pre-made frame can be made. It must be mobile. To do this, you can cut a longitudinal groove in the frame and secure the tripod with two studs. Then take two bars, drill holes on the sides, insert studs and tighten them with screws on both sides. The next step will be the mount on which the cutting product will rest. This can be done using small pieces of timber, which should be attached to the sides of the moving carriage.
After this you can start sharpening. Set the movable carriage to the desired height and clamp it with the thumbscrews. Move the tripod itself to required distance, securely fasten and sharpen the product by moving the knife along the side guides.
Sharpener LM
If in the future you plan to do professional sharpening of tools in large quantities, then you can make a sharpener called: Lansky-Metabo. Fixture drawings for sharpening knives with your own hands look like this:
If the product is clamped in the clamps with the root part, the sharpening angle will be greatest. A knife with this angle can be used as a “cleaver” and for processing hard wood. You can also easily sharpen knives using a jointer. Knife clamps can be made from angle iron or wood. The disadvantage of this design is the complexity of assembly and the large number of parts.
If it is not possible to assemble a complex tool for sharpening knives, then you can make do with improvised means and make manual knife sharpeners. A simple sharpener can be made from a corner frame into which a touchstone is mounted.
If you add a sliding carriage to the sharpener, you won’t have to hold the knife at a certain angle, which, in turn, will have a good effect on sharpening the blade. To make a movable carriage you will need a triangular block and a magnet. It is best to use a neodymium magnet, which allows you to attract the knife and fix it securely. If such a magnet is not available, then you can take components from the HDD ( hard drive).
Before you give a knife or other product for sharpening, you should familiarize yourself with the material, which will help not only in making a sharpener with your own hands, but also save a certain amount. The main aspect is to gain additional experience, which will be useful in the future.
In households, the use of cutting, sawing and planing tools is often necessary. During operation, they lose their sharpness, and the blade needs to restore its original properties.
Taking your tools to workshops to sharpen them is a reasonable option, but in order not to waste money again, you can make a device for sharpening knives with your own hands.
General information about sharpening knives
The goal of any type of knife sharpening is to ensure a sharp blade. And the most important factor that affects long-term and efficient operation is the sharpening angle. The practicality of this parameter is well assessed during the work process. If you look objectively, you will notice that with a smaller angle, the knife blade results in a sharper one. But with this action, it turns out that the period of improved cutting qualities is not very long, i.e. it becomes dull faster. The sharper the knife blade becomes during the sharpening process, the more quickly it will become dull. Based on this pattern, we can come to the conclusion that the angle must be selected correctly and the value must be maintained evenly along the entire length of the edge.
It is worth noting that only those types of blades that have a certain degree of hardening can be sharpened. If the steel hardness of the cutting parts exceeds 55 HRC, then it cannot be sharpened with any available tools.
The golden rule for sharpening knives is the constant sharpening angle of the cutting edge throughout its entire length.
To achieve this you need professionalism, skills and special equipment, which will allow you to hold the tool in your hands, maintaining a given angle of inclination of each cutting edge.
In this case, you can take care of purchasing a special device, but such products are usually expensive, so you can try to make it yourself. Read more about how to make such a device at home below.
Video “Homemade design of a simple knife sharpener”
Features of using the device
Of course, a simple whetstone is suitable for sharpening a knife or the cutting edge of a plane. But its quality will not be the best. To ensure uniform removal of the metal layer and precision processing, it is necessary to use special sharpening devices.
The advantage of such a product is not only its ease of use, but also factors such as:
- The ability to fix the blades, which is quite reliable and does not cause unnecessary stress. a properly designed device does not allow the metal to be damaged during operation.
- Possibility of installing the bar at a certain angle. Thanks to this, when the cutting edge moves, the angle value will not change.
- Variation in setting different sharpening angles. With this functionality, it is possible to process various tools, even sharpening knives with a stepped structure.
Materials and tools required for the device
To make a simple and quite high-quality device, you need to take care of preparing the following workpieces and tools:
- plywood or small laminated chipboard sheet;
- steel stud with a diameter of 8 mm (the thread on it must be cut along the entire length);
- textolite or ebonite bar (alternatively, you can replace hard rocks wood - beech, oak, etc.);
- aluminum plate (with a thickness of at least 5 mm);
- fasteners – bolts, nuts (wing);
- neodymium magnet (you can find it on an old computer HDD).
Drawings of a device for sharpening knives with your own hands
After preparation and provision of materials, you can begin the process of assembling the device. First of all, we take plywood to use as a frame, which should rest on the mounting legs at a certain angle in the range from 15 to 20 degrees. After that in bottom part, the pin we prepared is screwed in, its length should be approximately 35-40 cm. To make the mounting thread more durable, you can use glue or sealant.
We fasten an aluminum plate in the center of the installed plywood. Before fastening it, it is necessary to make a groove, which in size will correspond to the diameter of the fixing bolts. It is worth noting that we use an aluminum plate as this will help avoid damage to the steel blade of the knife.
After this, we proceed to making a lever that will allow you to secure the emery to the device. To assemble it we use the remaining part of the pin. Then we take two textolite (or wooden) blocks and by sawing out we make holders for the lever. The stops should be secured on one side with a wing nut.
It is optimal to provide a spring-loaded block near the handle, which will allow you to quickly change the emery stone.
As the main elements, you can use blanks from homemade bars - we glue sheets of sandpaper to the aluminum plate, and their grain size should be different. Such a device can be quite easily fixed in the lever.
Home design feature- this is the presence of a hinge with a double degree of freedom. Such a device can be easily assembled using the same PCB bars. One of them should be screwed onto the threads of the vertical stud, and used as a horizontal rotary axis and a height adjuster for the lever support (this is necessary for setting the sharpening angle).
The function of the second bar, which has a horizontal hole for the lever, is that it should be screwed to the first.
Thanks to this, it is possible to ensure free vertical movement of the entire lever structure.
The knives are clamped with a plate, or fixed to the surface of a neodymium magnet. When removing the first layer with coarse types of abrasive, the blade must be securely fixed.
If it is necessary to perform fine-tuning, you can install the blade on a magnet and perform the sharpening operation with little effort. The horseshoe of magnets should be recessed at the same level as the table top and set with epoxy glue.
Manufacturing homemade device for sharpening knives can be considered complete. It is enough to set the desired angle and sharpen the edge slowly and smoothly along the entire length of the blade.
Video “Do-it-yourself knife sharpener”
Device for sharpening knives using electric sandpaper
An electric sharpener will not only speed up work, but also make it possible to obtain high-quality concave edge profiles on blades, the so-called fuller sharpening. It is impossible to achieve such forms using a linear bar; therefore, these types of devices are not interchangeable, but complementary devices.
It is noteworthy that a person, working on a manual sharpening device, controls the speed and intensity of the processes performed, while the emery wheel has a constantly high rotation speed, which can negatively affect the condition of the knife.
With friction, metal surface lends itself to strong heating, which results in the “tempering” of the hardening of the steel. The material loses many properties, it becomes less hard, which leads to abrasion and the appearance of torn edges. Another problem with a “released” knife is the rapid loss of sharpness. In this regard, you need to work carefully with an electric sandpaper, bringing the blade for sharpening to the abrasive for short periods of time and taking frequent breaks to allow the knife to cool.
When working in such modes, it is quite problematic to maintain constant angles, so the tool needs to be securely fixed during such processing.
The design of such a device is quite simple to implement. In the direction of the rotating axis, there are guides on the emery along which carriages with knives move. The angles are maintained mechanically, and the forces are determined directly by the operator.
This type of device is quite simple to make with your own hands - there is no need to carry out precision work for processing metal parts. The base material is actually used to make the guides.
On the workbench, near the sharpener, guides are mounted, with the help of which it is possible to change the distance from the knife stops to the abrasive. This distance affects the sharpening angle. The vertical rod must necessarily have up and down free movement regulators that have durable types of fixation of the current positions.
The knife blade should be held horizontally, pressing against the thrust element. The force in contact with the emery must be adjusted directly during operation. The processing needs to be done symmetrically; you just need to change the sides of the knife and sharpen them at the same angles.
The use of this method can only be suitable when processing classic types of knives. Kitchen, hunting, hiking and other types of cutting surfaces of various tools require a slightly different approach.
A common type of design for sharpening knives is the “Jointer”
For such a device, it is necessary to use a specialized sandpaper, with an end type work surface. The guide under the carriage is placed at the bottom so that it is located away from the rotating axis. This is due to the fact that in this part of the abrasive wheel, its work is considered most effective. Guides with cutting elements move manually, the clamps are provided by the tool’s own weight.
A drawing of each structural design is shown in the image.
This type of machine was used at the beginning of the last century, and throughout this time the technology of its operation has remained unchanged. The simplicity of this device makes it easy to make for your home workshop. Any components made of metal, plastic, or wood are suitable for this.
By replacing the cutting element on the jointer, you can sharpen the ice ax knives, the main thing is to maintain the correct angle, which should be flatter. Devices for sharpening scissors work on the same principle.
To sharpen a chisel and a plane knife, you can also use an electric sandpaper and locking carriages. But these types of tools are compact and can be sharpened with a mechanical tool.
There are equivalent methods - along the edges and across. In terms of quality, the processing is virtually identical; therefore, it is therefore impossible to primarily single out a specific type of device.
For factory products, blades are supposed to be adjusted transversely.
Using a similar principle, thick plywood is taken from which the frame is made. Any rollers can be used as a guide, preferably more than two. By moving the machine along the surface of the emery, the chisel blade is given an ideal shape.
If serious types of sharpening are not required, simpler devices are also suitable for minor edits.
Attach the bars with the required angles of inclination to the chisel. Place sandpaper and a piece of glass near them. Apply a soap solution to the glass surface.
You will be pleasantly surprised by the effectiveness of such devices.
For transverse sharpening, it is worth making a simpler device, where the guide element also acts as a support. The blade is attached vertically to the moving part. The only drawback of this is the fixed angle, which is set during the manufacturing process.
But, compared to a knife, the resulting deviations from ideals are not so critical.
This type of device can be used for sharpening plane knives. But due to the wide size of the blades, the process becomes somewhat more complicated. In this regard, you can use an electric sharpener that has an end working surface.
The stops are made of wooden blocks. It is important to provide for the possibility of changing angles. Clamps are provided by the operator, and can be performed semicircular sharpening, which is very indispensable for carpenters.
Naturally, this device is convenient to use for sharpening the edges of chisels. Given the high productivity rate, you will be able to restore tools even with a large number of nicks.
Now you know how you can create a homemade sharpening machine to perform all the necessary operations for sharpening knives at home.
Video “Device for sharpening various types of knives”
Every man in the house would benefit from a convenient sharpening machine. After all, the owner is often judged by how sharp this kitchen tool is.
There are many techniques for sharpening knife blades. For example, for a process carried out at home, only a turning block or ready-made devices with an angular gap shape.
To trim expensive hunters' knives, European manufacturers produce devices in the form of solid bars, the basis of which is a high-strength alloy.
This article will describe how to make a machine for sharpening knives with your own hands.
Why do knives get dull?
What is the reason why a knife becomes dull when cutting? This can be explained by the fact that the cutting edge has its own negative impact have abrasive particles that are present in the cut material. For example, they are present on vegetables and paper. Speaking in simple language, the blade is subject to gradual wear.
The next reason is the inability to hold the blade in the desired position all the time. Any trembling of the hand causes the knife to tilt, which entails a lateral load.
Sharpening technique
The sharpening technique consists of unified, but at the same time quite labor-intensive methods. The main task is to eliminate damage to the blade. It should be noted that for many, such a procedure as sharpening knives provides good location spirit and peace.
The basic rule in this process is to maintain a precisely specified constant angle. No force required here. The main thing is that the block and blade meet at a certain angle. This is the basic 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 acquire the sharpening skill. The angle indicator can be controlled using a regular marker. They should paint over the connections and, after several sharpening cycles, see how well the paint is preserved. If it is worn unevenly, then the blade is not processed well.
If the knife being sharpened is decorative, then you should seal the blade with tape so that only the cutting edge remains open. Even if you misdirect your hand, there will be no scratches on the blade.
An important point is that the direction of the blade along the block is perpendicular to the edge at the points of contact. This is actually quite difficult to do. It is acceptable for the angle between the edge and the blade to be less than 90 degrees. But when directed along the cutting edge, this indicator is not suitable.
The abrasive particles of the stone 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 they will be of no use during cutting. The worst thing is that the cutting edge may break off altogether.
It is important that the bar is long. It should be one and a half or two lengths of the blade. It is allowed for the diamond block to be somewhat shorter, as it grinds faster and better. Its width does not play a significant role. If it is wider, then it is more convenient to work on it and there is less chance of the blade moving beyond the limits of the device. It might damage him lateral surface or a blade.
There are homemade devices for sharpening knives different designs. All that is required from the manufacturer is availability the required material and tool skills.
The operating principle of such a device as manual machine To sharpen knives with your own hands, you need to hold the knife blade in a vertical position and drive it along a block fixed at the desired angle. This is much easier than placing the sharpening stone horizontally and holding the knife at the desired angle.
In order to make a machine for sharpening knives with your own hands, you need a piece of laminate, a wooden strip, sandpaper and a pair of bots with wings. Chipboard or plywood can serve as a replacement for laminate.
To make a knife holder, you need to cut off some of the material. To prevent the block from touching the holder when sharpening, you should sand its edge at an angle using sandpaper.
It is necessary to mark and cut off the top of the vertical post, which will serve as a support for the block. The angle chosen is half that at which the knife will be sharpened. For kitchen knives, it is recommended to take an angle of 10-15 degrees.
A machine for sharpening knives with your own hands, the drawings of which are prepared in advance, requires the correct calculation of the length of the base of the racks. Please note that the height indicator will be affected by the subsequent installation of the transverse support. After this, all parts are trimmed and the edges are cleaned.
Holes are marked and drilled in the base and plate for pressing the bolts that secure 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 secured with bolts.
Vertical posts are secured with screws. It is also taken into account that the load on the bottom is small. In this case, it is better to resort to using thermal glue. The horizontal crossbar is attached in exactly this way. The sharpening device is almost ready. All that remains is to make the block.
To make it, a strip of the required length is cut. Sandpaper is glued to one edge with the right size abrasive To optimize the result, you can resort to making several bars with different grain sizes. The range P600 - P2000 is considered the best. To protect your hands from cuts, you need to screw the handle on the top side of the rail.
The result is a homemade machine for sharpening knives with your own hands, characterized by high functionality and practicality. When working, the device rests against the edge of the table, which is quite comfortable when using it.
There are also other types of machine for sharpening knives with your own hands. In this case, it is based on an M8 threaded rod. Two large washers and nuts are used, which serve to hold a bar 200 mm long.
Covers the thread. A pair of paper clips serve to secure the guide stand at the desired height. This ensures smooth adjustment of the sharpening angle. The base is made of timber, the thickness of which is 40 mm. It is supported by hand.
How to sharpen jointing knives with your own hands
Every owner who has a plane or jointer, I've probably encountered the problem of sharpening their knives. It is expensive to purchase new ones periodically. Knives can be easily sharpened with your own hands. In this case, specialized machines are used, or if it is used constantly, it would be better to make a machine for sharpening knives with your own hands.
Do-it-yourself machine for sharpening a jointer knife
To sharpen a jointer knife, special sharpening equipment is used. The machine for sharpening knives with your own hands has a compact size. It can be installed in a garage or on a personal plot.
Many people are interested in how to make a knife sharpening machine with their own hands. To make a device you need to find certain details. Perhaps similar spare parts are lying around in your barn or garage. They can also be purchased via the Internet.
Sharpening machine jointing knives do it yourself consists of:
- faceplates;
- table;
- engine;
- vacuum cleaner;
- casing.
The first thing you should do is find the faceplate. This is the most important component of future equipment. She is the one responsible for the sharpening process. The jointer knives are narrow, and the faceplate guarantees complete and safe sharpening. You will have to buy this part new, but the rest can be used even as old ones.
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 to find a motor whose power should be 1-1.5 kW. There is no need to buy it. Anyone will do, even old ones washing machine. But everyone probably has a table, a casing and a vacuum cleaner.
Main stages of device manufacturing
When the table is selected, the engine is fixed directly under it. A faceplate is attached to the moving part. The engine must initially be equipped with a button that turns the unit on and off. It should be conveniently located.
For reliable protection the faceplate is covered with a casing square shape with one corner cut out. It is this area that needs to be sharpened.
A hole of the same diameter as the vacuum cleaner hose is made on the lower surface of the table in the sharpening area. The presence of a vacuum cleaner is not essential, but it is advisable to install it. It removes unnecessary dirt from blade processing.
What do you need to know?
Mounting the engine under the base of the faceplate is not a requirement. You can make sure that the parts are connected using a belt. In this case, the design will be more complex.
A do-it-yourself jointer knife sharpening machine is also suitable for saws and axes.
Ice screw sharpening
The sharp knives of the ice drill enable the fisherman to quickly make holes in the ice of reservoirs. However, over time, any cutting tools become dull and require sharpening.
For fishermen, a high-quality ice auger is a great source of pride. Often, true competitions on the speed of drilling ice holes are held on reservoirs. And victory does not always smile on young and strong fishermen who are armed with imported equipment. There are times when experienced fishermen, equipped with simple tools Soviet made. The reason for the high hole drilling speed lies in the good sharpening of the knives and the correct settings of the device. Beginner fishermen, having bought new Swedish devices, do not even have time to blink an eye before their knives become dull. Tiny grains of sand and pebbles in the ice contribute to the formation of chips and gouges on the blade.
Sharpening of devices is carried out by the most in different ways. Many of our ancestors did not even know what professional sharpening was. In most cases, sharpening was carried out using hand-made devices.
Homemade ice drill machine: what will you need to make it?
To make a device such as a knife sharpening machine, 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. A spring from a car is often used as a strip. But it is very difficult to bend.
Work progress
First you need to make the device case. The steel strips are bent in such a way that the chamfers of the knives pressed to the ends of the arc are not only parallel, but also in the same plane.
After making an arc from the same steel strip, a pressure plate is bent, serving as a clamp for the knives being sharpened
Holes for M12 or M14 bolts are drilled in the body and pressure plate. Having tightened the body and the pressure plate using a bolt and nut, we clamp the knives between them and check the strength of their adherence to the surface of the end of the emery circle.
If the knives are not located at the required angle (the chamfers do not fit exactly to the circle), then the device is modified by bending the body arc to the appropriate level. If the knives are positioned correctly, then the structure is disassembled, and stiffeners are welded to the body arc on both sides.
Sharpening knives is best done on a knife that rotates horizontally. In this case, when wetting the knives with water, the latter remains on the blade and stone longer, ensuring their safety. Dip knives in water frequently. This will help prevent the steel from overheating.
Disadvantage of the device
The disadvantages of the device include the impossibility of sharpening knives with different cutting chamfer angles. But each ice drill manufacturer offers its own models. In this case, a universal device is suitable.
Making a universal device for sharpening an ice drill
The universal design allows you to sharpen knives at any cutting edge angle. By smoothly changing the angle between the arms of the unit, on which the knives are fastened with screws, 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 hinge with minimal play, as well as an M8 or M10 screw with its own nut. Holes are drilled in the canopy arms. Their diameter is 6-7 mm (for attaching knives to them with screws).
A fixing plate with a slot for a fastening screw is made from a steel strip, the thickness of which is 3 mm. The plate and screw are welded to the canopy arms.
It happens that knives are sharpened, the location of the holes does not correspond to the holes in the canopy. In this case, additional holes for knives are drilled in the shoulders. non-standard type. In this case, the device has greater versatility.
How are planer knives sharpened?
Tools such as planers and surface thicknessers can often be seen in country houses. Through them, raw lumber is brought to the desired state. The knives of these devices, like any other, become dull. If you use them often, then the best way out there will be knife sharpening for planer with your own hands. To make sharpening equipment at home you will need various materials: metal, aluminum or wood.
A knife holder can be made from wooden block. Made through circular saw cuts at 45 degrees, you can sharpen knives with a belt grinder or a large block. If the latter is not available, then sandpaper is attached to a smooth surface made of metal, wood, chipboard or glass.
Knife holders can be made from scrap materials. The optimal solution will be used metal corners, which have an indicator of 90 degrees. When placing two knives on the sides, the sharpening angle of each will be 45 degrees. Using screws, you can secure the knives with a second corner.
Materials
1. Plywood or plastic plate 10 mm thick.
2. Screws, wing screws, washers and rod (0.5 m) with M6 or M8 thread.
3. Magnets from a used computer hard drive
4. Bearing from an old coffee grinder.
5. Emery (abrasive skins) sheets and bars of different grain sizes: 120, 320, 600, 1500.
Manufacturing
1. The stationary part of the machine is made of plywood (plastic). Strips 30 cm long and 5 cm long and 10...12 cm wide are fastened with the letter G from the bottom with an aluminum corner. In the upper part we install 1 or 2 magnets (we fill them epoxy resin). We drill a hole in the lower opposite part and install a threaded rod (height 12...15 cm) with a bearing vertically.
On the surface (to support the knife being sharpened) we install a prepared aluminum (or stainless steel) plate with a slot in the middle (up to 2 mm thick) with a wing clamp.
2. The moving part has two options:
Option A. For sharpening with whetstones.
Option B. For sharpening with abrasive cloths.
U aluminum profile 4 sides 25mm wide.
A strip of abrasive sandpaper of different grain sizes is glued to each side: 120, 320, 600, 1500. For stickers, I use a stationery glue stick. Afterwards, the used strip of skin is easily removed with a knife and a new strip is glued on.
Sharpening process
1. Install the knife to be sharpened as in the photo.
The knife is clearly fixed by a magnet and there is no need to secure it mechanically.
Using a movable stop, we set the knife up to the required position and secure the stop with a wing screw.
We place the moving part of the machine on the knife.
Now we set the sharpening angle by lowering or lifting the bearing using screws.
For the first sharpening, turn the side with the minimum grit number 120 (the coarsest) towards the knife blade.
sharpen until you get a continuous strip on the edge of the blade (0.5...1 mm wide)
We turn the knife over and repeat everything.
We continue the process with sandpaper 320, 600, 1500.
Now you can shave with a knife.
The same procedure for sharpening with sharpening stones. But in this case there are several disadvantages:
1. The middle part of the block wears out over time and then the sharpening angle “floats”, which is not the case in the first option.
2. Bars with different grain sizes need to be changed, but in the first option, to change the grain size you only need to rotate the edge. The bar is removed by pressing the spring with two fingers.
All knives are now fully sharpened. If some of the knives become dull during use. I only sharpen these 600 or 1500 grit knives with two or three strokes on each side of the knife.
Thank you for your attention!
"Useful homemade products"from Gamir Khamitov.