DIY mower knife

How to make a DIY lawn mower knife?

Perhaps the best option for caring for your own land is a lawn mower. With this device, you can level the grass level and refine the area with minimal effort. The main disadvantage of lawn mowers is that the knives wear out the fastest during operation. Chips and notches appear on them, and periodic sharpening of the edge as a result significantly reduces the width of the knife.

mower, knife

The easiest way out of the situation is to purchase a new branded knife. Nevertheless, if the farm has the necessary material and tools, it is quite possible to assemble it yourself.

Required materials and tools

To make a do-it-yourself lawn mower knife, you need a minimum set of tools:

  • Bulgarian;
  • Vice;
  • Electric drill;
  • Grinding stone 400. 600 grit.
  • Ruler or tape measure.

Of the materials, you only need a piece of steel sheet with a thickness of at least 3 mm. It is important that the metal is resistant to breakage. It is important to understand that a broken blade at high engine speeds can seriously damage the mower.

How to do it yourself

Lawn trimmer blades are available as one continuous long strip or as two shorter blades. The easiest way is to make one long blade. The point is that it is very difficult to balance two separate cutting elements that work synchronously at high speeds. The accuracy of the balance of the blade determines the uniformity of its operation, vibration, and this also affects the resource of the device and the convenience of its use.

The blade is pretty simple to make. First of all, you need to take a sheet of steel with a thickness of at least 3 mm and cut out the blade of the future cutting element with the help of a grinder. The dimensions of the plate are approximately as follows: the width is from 40 to 60 mm, and the length can be in the range of 30 to 50 cm.The length of the canvas depends on the diameter of the protective dome.

After the blade has been cut, you need to make the edge of the blade, as well as the blade of the knife. They are needed to create a swirl in the mowing process. The length of the blade is 50 mm along the blade and 25 mm across. Bending height approx. 15 mm. The cutting edge itself should be 60. 80 mm long. It is stitched from the edge of the canvas.

A fastening hole is made strictly in the center of a homemade garden trimmer knife. Ideally, if done correctly, the canvas will already be balanced. This can be checked by putting it on a horizontal rod and seeing how smoothly the knife is held in a horizontal position. Perhaps the plate will deviate in one direction. Then you need to grind off a part of the heavier edge a little, but this must be done very carefully so as not to overdo it.

Сделай сам.САМОДЕЛЬНЫЙ НОЖ ДЛЯ ГАЗОНОКОСИЛКИ. (DIY lawn mower knife)

Usually you won’t need to do this if the mounting hole is centered, but it is imperative to double-check the balance. A poorly balanced blade during operation causes beating and has a detrimental effect on the resource of the lawn mower.

Making homemade single-sided knives is not recommended. They are quite difficult to balance, and during operation, the position of one element relative to the other can get lost. This will cause an imbalance and negatively affect the convenience of mowing grass and the technical condition of the device.

DIY mower knife


It is no secret that often the creators of a particular project are not always able to meet the optimal cost of the manufactured equipment. In this regard, ordinary gardeners are not ready to purchase a professional tool at an extremely high price. However, no one forbids making devices with your own hands.

In our case, it is worth noting that a home-made mower cannot be called a complex unit that cannot be performed on our own. It is only necessary to take into account the main points of its creation.

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At the moment, there are two types of mowers for a walk-behind tractor:

The segment mower is quite complex and often difficult to maintain due to frequent blockages. In turn, rotary is an easy-to-create and operate option, which affects the growth of its popularity in horticultural circles.


It is no secret that often the creators of a particular project are not always able to meet the optimal cost of the equipment produced. In this regard, ordinary gardeners are not ready to purchase a professional tool at an extremely high price. However, no one forbids making devices with your own hands.

In our case, it is worth noting that a home-made mower cannot be called a complex unit that cannot be performed on our own. It is only necessary to take into account the main points of its creation.

At the moment, there are two types of mowers for a walk-behind tractor:

The segment mower is quite complex and often difficult to maintain due to frequent blockages. In turn, rotary is an easy-to-create and operate option, which affects the growth of its popularity in horticultural circles.

Balancing the knife

Balancing the blades is an important factor in the operation of a lawn mower. Without this, the cutting elements will create constant vibrations, this reduces the durability of the equipment and complicates the work. This is primarily important for tools with double-sided single blades, for other types it is not so critical.

To check the balance, it is necessary to fix a smooth and thin bar in a horizontal position by clamping the end with a vice. After that, the blade is put on the pin and fixed. If there is no balance, then the ends of the knife may move relative to each other.

To properly balance the blade, first grind the metal from the back of the secateurs so as to eliminate the overweight. It is impossible to achieve an accurate balance at home. For efficient operation of the mower, it is enough that the blade of the unit is kept in a horizontal position for some time.

Cleaning and straightening

First, the working part is cleaned of dirt or debris that has adhered to it during operation. The most suitable tools for this work are metal brushes (brushes). When the blade is cleaned, you need to degrease the surface and inspect the damaged blade.

Small solid debris trapped under the tool during operation can deform the pruner. Only the cutting edge of the lawn mower blades should be inspected for distortion, as the the blade itself can be of a complex design. The damaged tool is straightened by neat blows of a hammer with rounded edges. Place the knife on a sturdy surface such as an anvil. It is necessary to straighten it, starting from the edges of the deformed zone and gradually moving towards the center.


A self-made mower from the rear axle with your own hands is useless without mowing knives, which are fixed on a disk-type device. The movement is carried out by the power shaft. Bottom discs allow the device to glide on grass.

According to the technical characteristics of Kamaz 4310, it is able to overcome even uneven areas, which are beyond the power of some all-terrain vehicles.


The machine for sharpening chainsaw chains is a necessary thing that will come in handy on the farm and therefore it is worth approaching the choice of this unit with all responsibility. This article will help you in this difficult matter.

Few people know that you can assemble chainsaw attachments with your own hands, are you interested? Follow the link // and find out more.

Frame production can be carried out with corners from old scrap. It is better to make knives from an old rotary machine from a tractor, which will significantly save money. However, to improve traction and performance, it is worth shortening the rotor by two to four centimeters, based on the power of the vehicle.

Self-creation of the rotor will require a sheet of metal and two disc-shaped circles cut from it, with a diameter of 390 mm. In the middle of the discs, it is worth welding the legs, allowing them to rotate. In turn, the centrifugal force to cope with the mowing.

For the lower support. a disc from a peeling device 45 cm in diameter. The axial shaft will be an old pipe up to 3mm in diameter. The design requires bearing 80 106. The tube must be pre-drilled to accommodate the bearing mechanism. You will also need a welded pulley.

A disc with knives should be put on the previously prepared shaft. Next, the pulley is welded to the tube with a welding machine. 2 typical bearings will be responsible for the rotation of this design.

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The current model of this mower will grip 1.1-1.15 cm, and the number of revolutions will be 1500 pcs. If your area is dominated by weeds, then we advise you not to save money and purchase a special lawn mower for tall grass.

First, the mower is installed and welded onto the welded frame. Work can be secured by installing a casing.

The model can also be simplified by welding the lower disc to the metal structure from the corner.

Do-it-yourself rotary mowing machine. how to make homemade from the rear axle of a VAZ, how to make a mounted one from a combine gearbox

Working on your own land plot is a rather difficult task. In order to facilitate the whole process, special labor devices were invented, which over time evolved and were automated.

However, in addition to large-scale production units, there is a need for individual means of land cultivation, which will be distinguished by mobility, economy, environmental friendliness, etc. And at the same time, without fail, the entire agricultural field must cope with the task set before it with maximum efficiency, whether it be a walk-behind tractor or a mower, which will be discussed today.

Cutting out a blade for a knife

To do this, you need the following tool.

  • Hacksaw for metal with multiple blades.
  • Little Bulgarian.
  • Drill with a set of drills.
  • Files of various shapes.
  • Vise.
  • Necessary protection. special glasses, gloves, jacket.

The algorithm of work consists of several points.

  • Cut out the blank for the blade with a metal hacksaw or grinder. If you have a thick piece of steel, use a hard hacksaw. It is recommended to use standard blades. If you cut the blade from thin steel, then the process will not take much time. You need to cut out a rectangle inside which the main shape of the blade will be located.
  • Cut out the shape of a blade with a shank for the handle. This can be done with a grinder with a thin disc for metal.
  • File the cuts with a vise. To avoid damaging the metal with teak sponges, use wooden blocks for clamping. If a belt sander is available, the sanding can be entrusted to it. The metal will change color during cutting and processing due to the thermal changes that take place in the steel. This will not affect the strength of the knife.
  • Sanding the edges. For this process, it is best to use a wheel with coarse sandpaper so that you can gently sand the slope down to the middle of the steel. Sand the other edge in the same way until it is even. In the process, you need to be patient and careful to avoid rough processing. Work the edges evenly to get an even and regular shape.
  • We drill holes for rivets. Make sure to use a drill bit of the same diameter as the shaft or rivet that you plan to use to attach the handle to the blade. There can be any number of such rivets, so decide on the required number.
  • We make a handle for a knife and attach it to the blade.

DIY methods for making a kitchen knife

  • Model selection
  • Selection of materials
  • Cutting out a blade for a knife
  • Blade formation
  • Heat treatment
  • Handle making
  • Disc or disc brake knife

If you want to make a kitchen knife with your own hands, then this article was written especially for you. Making knives is a slow, delicate, painstaking, multifaceted, sometimes frustrating process. Such a business will require skills in metalworking, woodworking and design. It will take a lot of patience, attention and general level of preparation.

Blade formation

Before heat treating the blade, you need to finish it. This is necessary to get a quality product in the end. To complete the blade, you will need:

  • sandpaper from 60 to 220 mm (you can use a grinding wheel and a drill);
  • grinding block (even when using a grinding wheel);
  • files.

This is the easiest step. You need to start grinding the blade with the finest sandpaper and reach 220. The main thing is not to save, because then you will regret the scratches that were not removed in time.

Always perform each subsequent sanding perpendicular to the direction in which you worked previously.

Model selection

First you need to draw a future fillet knife and circle the resulting shape on graph paper. Try to draw the knife to scale, that is, in real size. The fewer changes you need to make to the design, the better.

Now you need to decide how the handle will attach to the knife blade. There are three common ways to make a full, partial, or through knife.

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The handle consists of two identical parts. these will be, for example, wooden parts. A partial way is when the blade of the knife extends into the shaft, which the handle then hides. The parts of the handle are superimposed on the rod and fixed. By the way, this method is used to make Japanese swords and sushi knives.

A through knife is similar to a partial knife, but the extension of its blade extends through the entire handle so that the handle can be secured with a nut or thread at the other end. Most knives with typesetting handles are made this way.

Choose the model that you like best and get to work.

Selection of materials

Of course, it is best to use stainless steel to create the blade. In addition, it will be more convenient for beginners to make a knife from a quick cut (steel). So, you will need a strip of metal from 30 to 60 cm in size.

In addition, you will need material for the pen, such as wood, micarta, bone, leather, cord, stone, gem, ivory, or meteorite. Of course, it is best to use a tree for the first time. Wood is a unique, beautiful and rather tough material. You will also need special rivets and epoxy to attach the handle. Or you can use a brass rod, making special pins from it for fastening.

After solving the issue with materials, you need to make a layout that will be identical in design to your drawing.

Heat treatment

Heat treatment of the blade is perhaps the most technically difficult part of the entire process. You can use a coal forge or a gas forge to forge metal.

The next hardening step is to heat the knife to a lower temperature (about 400 degrees Celsius). Thanks to this, the knife will be less brittle and retain its relative strength.

Now you need a tempering bath. Use oil for steel. Different types of steel require different quenching methods. oil quenching, water quenching, air quenching.

You must completely submerge the blade in water until it cools completely. The second thing you need to harden the metal is a magnet. It will help determine the hardening temperature, at which point the steel becomes non-magnetic.

Handle making

The sheet of paper on which your knife is depicted must be attached to a block of wood and outlined with a pencil. You only need to circle the handle, because we will cut it out in order to then attach it to the blade. Better to leave a few centimeters of indent around the shape of the handle You should have two of these mirrored parts of the handle, which you subsequently attach to the blade on both sides.

After the shape of the future handle is obtained, use a band saw to cut out the shape of your handle.

Remember to leave at least 1 extra centimeter while doing this to avoid cutting too much material.

On the handle of the knife you need to make preliminary holes, as mentioned above, where you will insert your pins or rivets.

If your knife is riveted, you must sink the hole to the correct depth. You can use a vernier caliper to determine the size of the rivet head, which is the size of the hole to be drilled.

Before proceeding to epoxidize your blade and handle, shape and sand two identical handle pieces.

Push the pins through the drilled holes to put the wood and metal in place. Now you can attach the knife with epoxy. Apply epoxy to one half of the handle and then connect it to the blade and the other half of the handle. Once all the pieces are connected, take the two clamps and grip the knife handle. Let the product stand for at least 5 minutes.

Disc or disc brake knife

In the exact same way as described above, you can make homemade kitchen knives from a disc brake at home. It will also need to use a band saw, sander, belt sander and knife assembly tools.

Using a grinder or band saw, cut out the blade and shape it to the desired shape. Hot red-hot steel will have to be cooled, so you need to prepare a bath of water in advance.

See below for a video tutorial on how to make a DIY kitchen knife.