Want to create a unique knife? Do you need a wood cutter or a sharp blade for hunting? To make a good product yourself is more than real. The main thing is to have the skill to work with metal and know what you want.
Making a knife: where to start?
First, prepare all the necessary parts and tools, fold them in one place. Decide which material you will use. If you need a sharp and durable product. make a knife from a saw.
Take the blank. A saw blade for wood or metal is best suited for this purpose. As a material for the manufacture of the handle for the blade, use wood (any, as you wish), textolite, plexiglass.
What tools will be needed in the process of making a knife?
To get started and make a knife from a metal saw, you will need:
- electric sharpener;
- electric drill;
- paste for polishing surfaces;
- copper or aluminum for rivets.
How to make a blank?
We’ll figure out how to make a knife out of a saw. Prepare a metal blade for making the blade. Draw on it a blank of the future tool, using a marker for these purposes.
Remember that a knife is considered a melee weapon if the length of the blade exceeds 2/3 of the total length of the product. If you incorrectly construct a knife from a saw and regard it as an edged weapon. wait for the punishment.
Having outlined the contour of the future product, take up the undercut of the form. It is important to draw the shape so that the cutting part of the future product is located in the area of the teeth of the saw. Because of the wiring of the saw, if you make butts in this place, you will have to do additional work to grind the bulge.
Things to consider when getting started
Do not start to grind a knife without training. Take a regular piece of metal and try to process it. To spoil a piece of iron is not so scary as to lose a good workpiece. You must not only regulate the pressure when turning, but also monitor the temperature so as not to overheat the iron. High temperature not only spoils the look of metal. Even if it does not change outwardly, its structure can seriously suffer: the metal will become much softer and more fragile. A circular saw blade made of low-quality metal will have to be sharpened more often.
To check if the iron has started to overheat, drip a couple of drops of water on the workpiece. If it immediately evaporates, rather cool the workpiece for the future blade. To avoid possible troubles associated with overheating of the metal, put a container of water near the machine and periodically cool the future knife from the saw.
Work with the workpiece
Having formed the basis of the future knife, proceed to the most important and difficult stage of work. the removal of descents. The descent is the surface on the knife, gradually tapering towards the blade. The purpose of the knife directly determines the angle and width of the slopes. Therefore, choose the average value if you want to get a universal knife from a saw.
Before starting work on the machine, draw the expected descents on a metal sheet using a marker. Grind gently, slowly, so as not to spoil the future knife. It is recommended, as in the previous step, to practice on a spare part. The slopes should be symmetrical and lie at the same angle on both sides. In this case, the blade must be undercut: leave a margin of about 0.25 mm.
To hone the blade, use sandpaper. For such purposes, sandpaper 8-10 hardness numbers are best suited. Sharpening a knife from a saw for metal is better on a wooden bar. To prepare an impromptu sharpener, take a bar and glue sandpaper to it.
Using a large emery cloth, you will give the blade the necessary sharpness, and taking a smaller one, polish the metal blade completely.
At the final stage of processing, polish the blade. Pull the same wooden block with felt or leather, rub with GOI paste and polish until you achieve the desired effect.
How to make a knife handle
The easiest way is to glue a handle from two cut and prepared pieces of wood or plexiglass. Making it much easier than fixing it on the tail of a knife. Naturally, you can choose a simple option and wind the handle with electrical tape, but why try so hard to eventually spoil the aesthetic appearance of the knife?
And here comes the most crucial stage of work. Since you have to drill in the shank of the knife, the blade can easily burst. Therefore, be vigilant and careful.
Steel is a hard, but at the same time brittle material. With a uniform distribution of pressure, when the saw is in operation, it is almost impossible to break it. But with spot drilling, the pressure increases, and the metal can easily crack. Therefore, it is better to drill a hole at low speeds and do not forget to add oil to the drilling site. In this case, a screwdriver is an ideal tool to achieve the goal, since it has less revolutions, and the possibility of breakage of the part is not so high.
After completing the previous step and making holes in the handle, drill the same in the halves of the handle. Make a copper or aluminum rivet. For insurance, you can glue the area where the rivet will be with glue, but it is better if you have epoxy.
Is it possible to simplify the process?
Masters say that a hole can be made without using drilling tools. The blade with the shank is covered with a layer of varnish. Where there should be a hole, you need to clean the surface of varnish. You should put the knife from the saw on the tree into the electrolyte solution and lower the wire with the negative charge into the container with the workpiece, and connect the positive wire to the power source, which can be used as a normal battery.
As a result of such an impact, a hole in the metal will turn out, although it will not be perfectly round, but it will not work out to damage the blade in this way.
Other part processing methods
If for some reason you cannot make a knife from a saw for metal, there is no necessary material. replace it. For the manufacture of a blade, a car spring is well suited, the metal of which is softer than that of a saw. To process such a workpiece, you will not have to use a sharpener, but you will need a metal saw to cut the shape of the blade. Since the metal is easier to process, the edges of the workpiece can be adjusted with a file. It will take longer to work on the manufacture of a knife in this way, because each processing step includes manual work.
Making a knife from a saw is a laborious process, but the result is worth it. Having made a knife from a saw with your own hands, you will get a high-quality and unique blade.
Video: Make a Band Saw Sharpener
Knife blades should be made of hardened steel to make it convenient to use.
In order to make it pleasant to work with a knife and at the same time convenient to cut, he must sit securely and comfortably in his hand. With a convenient handle, it can be used for a long time. But it is not always possible to find such a knife in a finished form. Then you can do it yourself. This takes into account the characteristics of the palm, the length and shape of the cutting blade. Knives should be made of hardened steel. Therefore, homemade saw blades will fully meet the requirements.
Knife Making Options
Homemade knives can be made of many metal parts that cannot be used for their intended purpose, since they have become unusable.
Shapes of knife handles.
Among the details from which you can make homemade knives, there are several:
- worn motorcycle rods from which you can make a set of knives of various lengths;
- balloon keys with 1 broken end;
- crutches that are used when laying rails;
- circular saw blades of various diameters and thicknesses;
- damaged hacksaw blade of the pendulum saw.
With certain skills in forging, you can make a knife from a thick metal cable, a chain from a home unit. A chainsaw is best suited for this. Its chain is strong enough, and a homemade knife will turn out like damask knives.
If the circular saw has a large diameter blade, and its damage is minimal, then it can make two homemade knives. Disks have significant strength of the metal, as the saw is used for various purposes for a long time.
Materials and Tools
To make a homemade knife, you need the following equipment:
A plot of knife thickness versus steel hardness.
- Woodworking Machine. If it is not, then an electric jigsaw can be used to pre-cut the handle. For final grinding, sandpaper of different grain sizes is used.
- Nails or better copper rivet wire.
- Grinding and sharpening machine. In his absence, you can use the angle grinder, puncher, high-power drill. In addition, nozzles or circles are needed with which to perform these operations. One of these tools should be firmly fixed, and then do the work.
- Files with various types of notches.
- Brass plate and rod, if the handle is not mounted on rivets.
- Epoxy adhesive.
Knives should have a comfortable handle. For her, the most suitable material is wood. Most often, birch, oak cubes are used. These rocks are the hardest, less susceptible to moisture during prolonged use. They are pleasant to the touch and have a beautiful texture. Since for the manufacture of the handle of the knife does not require a large amount of source material, then for this purpose you can use 1 parquet board, scrap of board or bar. It is important that the wood blank is not damaged, cracked and does not contain chips or other defects.
After the blade is sufficiently calcined, you need to cool it.
In order to make a knife, it is necessary to use certain grades of steel. It should be remembered that its characteristics depend on how the metal was quenched technologically. For example, with increasing hardness, the fragility of metal products increases. For steel, steel grades P6M5 or R3M3F2 are suitable. At the same time, a metal thickness of 2 mm will be enough.
The strength of a homemade knife does not depend on the thickness of the metal. It is influenced by its geometric dimensions: length, width, blade shape and descent. With the right choice of these components and accurate metal processing, obtaining an excellent knife is guaranteed. Such steel grades are used in the manufacture of disks, blades, tools such as, for example, a circular saw.
If it is decided to use a hacksaw blade as a metal blank, then it is necessary to take the blade from the pendulum saw. This saw performs work on thick metal (for example, rails) and meets the requirements of rigidity and strength. The size of such paintings varies within the length / width / thickness, 400-500: 30-40: 2 mm. The color is determined by the type of manufacturing process the saw has undergone and can be black or gray.
Before starting the manufacture of the knife blade, it is necessary to check the integrity of the metal. This can be done by ear, but this requires some experience and skill. The whole canvas makes a loud sound, damaged. dull. If it is difficult to do this by ear, then a thorough inspection of the metal blank is necessary.
On a whole piece of canvas, the marker is applied to the contour of the future knife.
The angle of inclination of the blade should be equal to 20 degrees.
over, this should be not only a blade, but also an allowance, which will then be hidden in the handle. After that, on a metalworking machine (or a carefully fixed angle grinder with a circle), it is necessary to gradually and accurately remove the excess.
This should be done slowly, as the metal can heat up. To cool it and continue to work, take a bucket of water. This capacity should be sufficient so that the workpiece is placed completely in water. The same machine performs the contours of the blade. It should be borne in mind that a feature of this steel is that with a sharp change in the temperature of the metal, tiny cracks can form in it. This can lead to the fact that even with a little effort, the knife breaks. Therefore, it is impossible to prevent overheating of the metal during its processing. The tip should be especially carefully observed, because when the thickness decreases, the metal heats up faster.
Completion of the process: recommendations
After the main part of the metal is removed, it is necessary to align the straight sections. This is done on the side of the circle. Especially in alignment the butt and the cutting edge need. The angle where the blade of the knife goes into its tail should not be 90 degrees. This will significantly weaken the entire structure.
A copper or brass rod of 4-6 mm is suitable as a rivet. The diameter of the rivet should be smaller than the holes in the shank.
The slopes of the blade should have the same width and angle, and also converge at one point. This will make the knife sharp and easy to sharpen further. When performing descents, it is necessary to constantly cool the metal, stop and check the symmetry and accuracy. After that, the blade is polished and polished.
On a wooden workpiece using a jigsaw, a cut is made and the contour of the handle is cut out. Having put a shank, outline the holes and drill them. The shank is coated with epoxy glue, inserted into the slot. Thread a rod through the holes, cut off the excess and rivet. Protruding glue must be removed before solidification. Grind the handle with sandpaper until the handle becomes smooth.
Good day to all !
In this article, we will consider a method of manufacturing a knife; as a material, a cutting blade of a quick-cut saw will be used.
Let’s start manufacturing!
We take our blank and mark on it the future shape of the blade. When everything is ready, for convenience we clamp it in a vice, and with the help of an angle grinder with a thin cutting wheel we cut off the excess metal parts along the marking contour. In order to precisely fit the cut shape of the blade, according to the drawn markings, you need to additionally process the edge on an emery or walk along it with a cleanup circle.
Since the surface of the canvas has traces of rust, which we do not need, we remove it with a special nozzle for a drill, or with an ordinary hand brush
Let’s get back to our bolster, after we fired, the bolster needs to be finally fixed on the blade, and the unnecessary slots should be hidden, the author decided to solder it.
Since the author did not have a sufficiently powerful soldering iron, he decided to use another proven method, using a heated brass blank. Soldering acid was taken to solder the metal with brass bolster, and a scrap from the bolster was used for an accurate fit.