A neatly trimmed lawn is not only beautiful in itself, but also in a certain way indicates the status of the owner of the house. Nowadays, it is not difficult to find a suitable lawn mower in terms of performance and design. But there is another option. If a medium-power electric motor was lying around on the farm, then, after spending a few evenings, it can easily be turned into a simple and convenient home-made lawn mower, while saving not such a small amount of money that would have to be paid for a branded lawn mower - and even enjoying creativity.
General arrangement of the lawn mower
In its simplest form, a lawn mower consists of the following components and parts:- Engine.
- The frame on which all mower units are fixed.
- knives.
- Protective cover.
- wheels.
- Handles for management.
- Details of the control system: switch, RCD, power cable with plug.
The frame of the simplest design is a metal sheet 2-3 mm thick with a hole in the middle for the passage of the motor shaft. The sheet is reinforced with a frame of metal corners. An engine is attached to the sheet from above, a protective casing from below, on the sides of the axle for wheels, handles for control.
If the motor is flanged, it can be mounted directly to the sheet by drilling holes in the latter that match the holes in the flange. If the engine is of a conventional design, two perpendicular racks from the corner must be welded or screwed to the sheet so that they coincide with the legs of the engine.
Homemade lawn mower. Fastening the electric motor to the corners.
Holes are drilled in the corners for mounting the engine. If the holes are made in the form of grooves, this will allow the engine to be displaced relative to the frame during mounting, thus changing the distance from the knives to the ground. This design feature will be useful in selecting the optimal grass cutting height. But it's easier to make holes for different positions of the engine in height.
The central place of the lawn mower is the cutting unit, which consists of a mandrel with two short (or one long) knives fixed on it.
Engine
A good option is an asynchronous electric motor with a power of 500-600 W and above, with a speed of about 3000 rpm. A big plus of an asynchronous motor is its low noise. The higher the engine speed, the better and smoother the cut. In fact, the quality of mowing is determined not by the speed of rotation of the knives, but by the linear speed of the cutting edge relative to the grass. At the same number of engine revolutions, the linear speed of the cutters is the higher, the larger the grip (the diameter of the circle along which the cutting edge rotates). Therefore, with a large grip (more than 40 cm), the engine speed can be lower. However, in this case, the motor power must be greater - in order to overcome the increasing resistance. Practice shows that this option is quite workable: grip - 50 cm, engine power - 1 kW, speed - 1500 rpm. But in principle, the grass will be mowed, although worse, and a 500 W engine with a frequency of 1500 rpm. Only with a small motor power, it is necessary to sharpen the knives regularly.To connect a three-phase motor to a single-phase network, it is necessary to use a circuit with working and starting capacitors. There is a lot of information on the Internet about connecting three-phase motors to a single-phase network. It is not difficult to find formulas for calculating the required capacitance of capacitors. In practice, they take about 200 microfarads for a motor with a power of about 2 kW. For a power of 500-600 W, 60-80 microfarads is enough.
When making a casing for the engine, it is necessary to provide holes for engine cooling.
You can also make a lawn mower with your own hands using a conventional electric drill with a speed of up to 3000 rpm. It is not so difficult to come up with a drill attachment to the frame. However, you need to understand that in terms of reliability and duration of continuous operation, a drill cannot be compared with an asynchronous motor, so if you have to mow a relatively large area, preference should be given to the latter.
A drill is more suitable for making a homemade trimmer.
In the case of a drill, it is very easy to make a knife mount. A knife with a hole in the center is clamped with a nut on the bolt, and the bolt is clamped in the drill chuck.
Mandrel
The simplest design of the mandrel is a disk or strip with a flange in which there is a hole equal to the diameter of the motor shaft. The flange is put on the shaft and stops on it, knives are attached to the disk or strip. The diameter of the disc or the length of the strip depends on the planned working width and the length of the knives. As a finished mandrel, you can use a pulley with a bore diameter suitable for the shaft of an existing engine. This will solve two problems at once - the centering of the mandrel and its fastening. But the pulley must be sufficiently reliable.The mandrel must be securely fastened to the motor shaft. This is usually done with bolts screwed into the flange perpendicular to the axis of the shaft.
As a mandrel, you can use a stone holder for a sharpener.
To prevent grass from wrapping around the shaft, it can be closed with a tin can.
If there is no suitable pulley or other suitable parts, you will have to order the manufacture of a mandrel to a turner or make it yourself from a pipe of a suitable diameter and a strip or circle welded to it. There are three problems here: finding a suitable pipe diameter, ensuring that the welded strip or circle is perpendicular to the pipe, and centering the mandrel after it has been manufactured. With some effort, all these problems can be solved.
Knives
As knives, flat tool steel with a thickness of 2-3 mm and a width of 20 to 50 mm is used. The thinner the knife, the better it cuts. However, a thick knife is stronger, which, given the obstacles encountered in its path in the form of bumps, various foreign objects and even stones, is very important.The execution of knives has two main options. The first is a knife in the form of a long strip, which is attached to the mandrel symmetrically about its axis. The length of the knife in this case is equal to the width of the grip - usually 30-50 cm. The sharpened ends of the strip act as incisors. The knife and the mandrel in this case can be one integral part in the form of a plate, to which a flange with a mounting hole is welded or riveted.
The second option is two short knives 50-80 mm long, which are mounted along the edges of the mandrel at an angle of 180 ° to each other. They can be located straight or with a slight slope. You can fasten the knives with two or one bolt. The first method is more reliable, however, fastening with one bolt allows the knife to fold (without breaking or deforming) when it hits an obstacle - a stone or a bump. The fastening of the folding knives should be regularly inspected, because. over time, the screws can fray.
Steel for knives must be hard enough, but not brittle, otherwise the knives may break, which will not only require their replacement, but also create a risk of injury from a flying piece. The experience of amateur craftsmen shows that a hacksaw blade for wood with a thickness of 2 mm is very well suited as a material for lawn mower knives. The technology for making a knife from them is simple. Two blanks in the form of strips are marked on the canvas (or one long knife is made from the canvas with sharpening at the ends and holes for fastening in the middle), which are then cut out with a grinder. Holes for fastening are drilled in the blanks. After that, it remains to sharpen the knives, attach them to the frame and center.
If drilling holes is problematic, then you can put the canvas on a metal surface with a hole of a slightly larger diameter than the hole in the canvas should be, and hit with a punch. The protrusion formed after the impact is removed with a file (if the metal is soft enough) or on a sharpener. If the hole does not meet the desired diameter, the process is repeated.
In fact, there are many options for making workable knives, as well as materials for their manufacture. The main thing is to sharpen them well, center them (so that there is no vibration) and securely fasten them. When fastening the knives to the mandrel, use washers and locknuts. Without this, the mounting bolts will loosen from vibration.
If possible, it is better to make the cutting edges slightly bent down, like branded lawn mowers. This will reduce winding of the grass on the motor shaft. Or you can make a disc that covers the shaft. Also, if the engine power is close to the power of branded lawn mowers, you can buy a branded lawn mower blade ().
wheels
The diameter and position of the wheels must be selected so that the knives are located at a distance of 5-6 cm from the ground. This cutting height is considered optimal - both in terms of the aesthetics of the lawn and the quality of the haircut. If the grass is cut at too high a height, it will bend, allowing the blades to pass over it and remain uncut. Lower cutting is difficult because of the unevenness of the ground.There is no unambiguous opinion about what number of wheels is optimal - 2, 3 or 4, among the craftsmen who operate homemade lawn mowers. 3 or 4 wheels are good because they set the exact distance from the knives to the ground. Two wheels make the mower more maneuverable and allow you to cut grass in any hidden places. In addition, it is easier to find two identical wheels than three or four. However, you can make wheels yourself, for example, from plywood and bearings, so the last argument is not so convincing. Ultimately, the choice is up to the artist himself.
If a two-wheeled lawnmower is selected, then there must be protection against touching the ground with a rotating blade.
If a three-wheeled lawn mower is selected, two wheels must be on the side of the handle so that the front of the mower can be lifted to turn by pressing on the handle.
The larger the diameter of the wheels, the better. A lawnmower with small wheels is more difficult to roll over the grass.
If the edge opposite the cutting edge is bent up at the knives (or the blades are riveted to them), they will work like a fan, lifting and rotating the cut grass with an air stream. At the same time, if a cutout is made in the casing (in the quadrant where the knives run) and a mesh bag or box is pulled over it, then cut grass will be collected in it.
At the end of the article there is a video demonstrating the operation of the second lawn mower.
Without a bag, the grass will stack in the direction specified by the cutout. Without a hole in the casing, the grass will be crushed, it will be mulching. But for all this, a sufficiently powerful engine is needed, and in order to avoid stuffing cut grass into the engine, the space between the engine and the knives must be closed with a disk.
Working with the mower will be safer if one of the handles is equipped with a lever, which, when released, cuts off the power supply to the engine.
Security measures
When taking on the manufacture of a lawn mower with your own hands, you need to understand the danger posed by the operation of such devices. If we talk about the main threats, then there are two of them: electric shock and injury from rotating knives. Both are classified as very serious, so security measures must be taken very carefully.It is necessary to carefully insulate all points of connection of electrical wires - both on the engine itself and on the control parts. The insulation on the supply cable must not be damaged. To power an electric motor, it is necessary to have a double-insulated cable with at least 3 cores. The body of the mower is reliably grounded, for which one of the cable cores is used. Or they connect the lawn mower to the network without fail using an RCD - a residual current device designed to de-energize electrical devices when a person touches their parts that are energized due to insulation failure.
The mower must not be operated without a protective cover. When working, make sure that there are no people nearby. Broken knives fly out at high speed. And if the operator himself is protected by a casing, then for some designs of homemade lawn mowers, the front area of \u200b\u200bthe mower remains open. Mow preferably in rubber boots. This will protect against the consequences of hitting various objects that are thrown by a rotating knife.
Do not use the mower in wet weather and early in the morning when there is dew.
Below is an example of an incorrect homemade lawn mower.
The engine is completely open, while there is no makeshift casing for it, there is not even a protective disk on the side of the knives, although there is a huge hole there. There is no casing protecting the lawnmower from a flying knife or a thrown stone. The handles are welded on and cannot be tilted and cannot be removed when storing or transporting the mower.
DIY lawn mower video:
Homemade lawn mower from a basin
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All owners of personal plots are faced with the problem of mowing the grass, which grows literally before our eyes, and it takes several times to ennoble their site several times during the season. The usual manual scythe has long been replaced by gas trimmers and electric trimmers. But the price for them is not reduced and is quite tangible for many owners of cottages and private houses. Craftsmen nevertheless found a way out of this situation and learned how to make trimmers with their own hands literally from improvised means, using gas and power tools that were not intended for these purposes.
Most often, a home-made electric trimmer is made on the basis of an ordinary grinder, which is available to every home master. This tool is almost ideal for conversion into a trimmer. It has more power than store-bought machines and a higher number of revolutions per minute. In addition, the standard nut used in the angle grinder to secure the discs already has holes through which it is easy to insert the fishing line (cord).
So, there are many options from which to make a barbell (holder). The simplest is longer than for a shovel, wooden holder. A grinder is attached to the end of it at the right angle using ordinary tape. The fishing line is inserted into 2 holes of the nut, after which it is twisted. Thus, in a few minutes you get a trimmer that can mow the grass without any problems.
For the safe operation of a home-made device, you can improve it by making a protective cover (how to do this will be discussed later).
For advanced craftsmen who have a welding machine, we can advise a more advanced design for fixing the grinder and the protective cover. It is made made of aluminum tube(serves as a holder) and a metal square profile. Looking at the figure below, you can understand the principle of manufacturing the holder.
The grinder is fixed on the holder with bolts inserted into the holes that are designed to fasten the handle to the device.
The following photo shows how this design looks from below.
By the way, you can also screw the holder (rod) to the holes for attaching the handle when you want to make a simple trimmer that is easy to assemble and just as easy to disassemble if you need to use the grinder for its intended purpose.
To make it more convenient to hold the trimmer in your hands during work, and it does not rotate around the axis of the bar, you can attach side handle made from bent pipe.
From a vacuum cleaner
The trimmer from the engine from the vacuum cleaner is made according to the same principle as from the grinder. The motor must be mounted on the rod, and either knives or a plastic or metal disk should be attached to the motor shaft, into which the fishing line should be inserted. From above the cutting tool is closed by a protective cover.
To prevent dust and small particles of cut grass from getting into the engine removed from the vacuum cleaner, it can also be hidden in a plastic casing made from a sewer pipe as shown in the following photo.
Since the motor in the vacuum cleaner is high-speed, it needs provide cooling. Therefore, under the washer into which the fishing line is inserted, it is recommended to insert a home-made disk with slotted and curved blades so that it acts as a fan that creates a vacuum. It is required so that air is sucked in through a hose from above and cools the motor.
In order to ease the strain on the hands of the mower operator, the machine can be install on a platform with wheels. In this case, you will already get something similar to a lawn mower.
You can also use either a pulley with a suitable mounting hole or a plastic wheel from a trolley to secure the line.
From a drill
The simplest mower is made in a matter of minutes from a drill or screwdriver. But first you must make a knife from a sharpened metal plate with a hole drilled in the center. A bolt is inserted into this hole and clamped with a nut.
Since the drill with this nozzle does not have a protective casing, such a tool is quite dangerous for the user. To protect yourself, you can place a drill, like a grinder (this was discussed above), on a shovel handle or on an aluminum pipe.
Also, to protect the user of the mower from knives, a casing can be attached to the drill (it is attached to a plastic pipe and put on the body of the device).
The drill is attached to the bar with clamps.
From a chainsaw
For a chainsaw, many different nozzles have already been invented that expand the capabilities of this unit, for example, a cultivator, a drill, a boat motor, as well as a scythe nozzle. You can see how it looks in this video. In case you want to make a trimmer out of a chainsaw, then the maximum that you can do is lawn mower on wheels, since the engine of the unit is quite heavy, and it will not work to apply the above-described options for manufacturing trimmers (with a lower drive location).
Therefore, the trolley is made first. It can be welded from a corner of 25x25 mm. The dimensions of the frame should be 500x600 mm. Wheels are attached to the corners of the frame.
When installing the trolley handle, make sure that it does not block the winder (starter).
The gasoline engine is mounted (screwed through the holes to secure the tire) to the frame so that the gearbox is rotated 90 degrees and the shaft is at the bottom.
Now it remains only to mount on the shaft of the unit cutting tool. This is done in the following way.
- It is necessary to weld a small piece of pipe, 80 mm long and 50 mm in diameter, to the “asterisk” of the apparatus. It is better to cut the pipe on a lathe so that the ends are perfectly even.
- Next, find a pipe with a slightly larger diameter - equal to 58 mm. It must also be cut to a length of 80 mm. Thus, you will get a telescopic shaft, which is connected with 2 bolts (m6) located opposite each other. Bolts must have locknuts. Below is a diagram on which the trimmer head is made, which serves to secure the cutting tool.
Several holes must be made in the telescopic tubes so that the height of the knives above the ground can be adjusted.
It is better to make a knife of such a design as in the following figure.
Due to the fact that movable knives on rivets are fixed on the disk, they will simply bounce when they meet a stone or a dry branch. This will protect the shaft and gearbox from damage that can occur when the tool jams.
The rivets that hold the knives on the disk must be metal.
The disc diameter (made from 4 mm sheet steel) should be 180 mm. Knives are made from strips 30 mm wide and 120 mm long, cut by a grinder from a hacksaw blade for wood.
DIY trimmer knife
If you need to mow plants with thick or stiff stems, then ordinary fishing line will not cope with this task. Therefore, you cannot do without a special metal knife. Trimmer knives can be bought at a specialized store, or you can make it yourself, for example, from an old circular saw blade(without soldering). The knife is made as follows.
Homemade protective cover
If you are making a homemade mower, then you will definitely need a protective cover. It will protect your eyes, body and legs from injury from small pebbles and splinters of knives if they break.
The casing for the trimmer can be made made of aluminum sheet or sheet metal.
In this way, it is possible to manufacture and install a protective cover on a trimmer purchased in a store if the shield is split for some reason. Shields in factory machines are made of plastic and often break if you unsuccessfully hit the trimmer head on the ground to lengthen the line.
Trimmer belt
For more comfortable work with the trimmer, if it is intended to process a large area overgrown with grass, it is advisable to use a special belt. This device removes fatigue from the hands and back of the mower operator and greatly facilitates the process when compared with the same work, but without a belt.
Belts are shoulder and knapsack. The shoulder strap is the simplest device and consists of a loop with two or one latch (carabiner), with which it is attached to the mowing unit. A plastic plate is usually attached to the second carabiner, protecting the operator's side from pressure from the trimmer bar.
The shoulder strap is usually used with light trimmers, weighing 3-4 kg. For heavier units, it is more convenient to use a backpack strap.
A trimmer belt can be easily ordered online or bought at a specialized store that sells these machines and accessories.
The price of backpack straps starts from 250 rubles and above.
If there is a desire to make it with your own hands, then any housewife, looking at this device, can easily sew it from improvised means (old belts and belts). You may have to buy buckles and carabiners. But still, we recommend buying a ready-made knapsack suspension and not wasting time and money on making a device that is worse in quality than the finished one.
On the farm, a lawn mower is not an essential device. Its need especially affects the summer cottage, during the harvest period and the rest season.
Every normal owner wants to have a beautiful well-groomed one on his site. Here you have to work hard with a scythe, purchase a quality lawn mower or assemble this device yourself. In the latter case, its composition will be as follows:
- engine,
- knives,
- comfortable handle.
The motor will need power, so you will need a very long cord with a plug, as well as a switch. You can make the job easier if you attach wheels to the bottom of this technique. The whole thing has to be held up somehow. This function will be performed by the frame.
Process of creation
The initial stage of self-creation of a lawn mower is the selection of parts. The most important thing is the presence of the engine. It can be taken from already unused household appliances, it can be removed from some power tool:
- drills,
- vacuum cleaner,
- chainsaws,
- Bulgarians.
The minimum required engine parameter is 500 V. Better than 1000 V. So it will be possible to work at low speeds. Yes, and sharpening knives will become an obligation more rare. The selection of the engine is influenced by the diameter of the knife and the total dimensions of this equipment. The larger the working area for it, the higher the power of the engine should be.
cutting part
The key component of the mechanism is the knife. Its quality determines the life and efficiency of the device. For its manufacture, solid steel of the highest quality is required.
The knife can be made solid up to 50 cm in length. In it, in the center, arrange a hole where the screw will enter. The knife will be sharpened on both sides. Its shape can be made slightly curved.
Another version of the knife is compound. The strip is attached to the steel with bolts or by welding a pair of metal, maximally sharpened pieces. A steel strip can be made in a trapezoid format. This will protect the knife from layering the grass.
You can also create a knife in the form of a solid round disk. It also needs to be sharpened well. Such a form, unlike other forms, when colliding with a stone or a stick, will withstand such attacks and not be damaged.
Pen
The handle for the upcoming apparatus can be taken from an old stroller. From there, you can borrow the wheels and frame.
If you can’t get a stroller, you can use a metal pipe to weld the handle. 
Electrician
The power cord can be removed from any unnecessary household appliance. If its length is small, you can use extension cords.
Wheels can be borrowed not only from a stroller, but also from an old vacuum cleaner.
Assembly process
For the frame, you need a piece of metal, or plywood with a thickness of 8 mm or more. Here you will need to create a protective metal casing. This will reduce the chance of your lawn mower breaking down.
The necessary tools are here:
- welding equipment;
- hacksaw (metal view).
- First, the frame for the motor is prepared. Although plywood is suitable, it is better to take a sheet of metal with a thickness of at least 3 mm. It is more resistant to deformation. The size of the frame is determined by the length of the blade and the width of the lawn mower (this parameter is usually no more than 60 cm). A square is cut from this sheet with a side similar to the width of this unit. In the center of the square, holes are created for the motor. The flanged motor must be fastened to the frame with the shaft down. If the engine has ears, one more mount is welded to the frame.
- For the manufacture of the simplest casing, a metal tin can is used. It is better to make the casing high, so it will become a protector for the electrics of the lawn mower. It must be put on the motor shaft. Then put on a knife (carefully sharpened). The whole mechanism is connected by a bolt. Wheels are attached to the frame. For them, it is necessary to weld corners with holes to it. The diameter of the wheels should allow the knife to pass freely 5-7 cm above the ground. If he goes lower, he will remain in the ground. If it is higher, it will crush the grass, and not cut it.
Frame example (photo): 
- The handle needs to be edited for the growth of the main user of the future lawn mower. Its optimal length is about 90 cm.
After this assembly, it remains only to connect the power cord.
Advice! You can protect yourself from cut grass by attaching a net over the lawn mower.
The most primitive homemade lawn mower
Created almost from scrap metal.
Lawn mower based on an old washing machine
As you know, Soviet "washers" were stamped from strong metal. Their engines are optimally matched in terms of performance and power for the intended lawn mower.
The superior steel hull will act as a defensive skirt and guide when the grass is folded to the side.
It also uses two pulleys and a belt that transmits momentum from the engine to the knife mechanism. The motor is mounted on the platform and connected to only one phase. 
Such a unit will work in the area near the house, since it is connected to the network with an electric cord. To make the device more mobile, a special coil wire is used - an extension cord with a cross section corresponding to the power of the motor. Its minimum length is 40 m.
Drill Based
Here, instead of a drill, a wide knife is attached to the drill used. The drill itself is attached to the created frame along with its handle. And the drill cord will be sent to the network.
Such units are suitable for work in areas near curbs and under trees.
It is important to use a low-speed drill with good power and dynamics of 1500 - 3000 rpm. You also need a competent selection of power to the width of the swath. Motor overload is not allowed. Such a drill generates the required torque, and the grass is easily mowed. In work, it is necessary to pause so that the engine "rests".
The platform for the engine should be narrow so that it is convenient to work with the wall platform. The stability of the unit is affected by the position of the center of gravity. The lower it is, the less the platform overturns.
If you intend to create a more powerful modification with parameters of 1500 - 6000 W, then the engine installation will go to a special sole. A suitable motor is asynchronous: it makes less noise.
The undercarriage is metal wheels covered with rubber. They have a wide projector. So the grass will be less wrinkled. And here, the bearing units in the axle bushings are stronger than plastic liners.
The deck and knife are created from an old frying pan and a steel plate (steel is tool). This knife attachment design has high efficiency. It is important not to violate the ratio and profile of sharpened edges. In work, it is better to adhere to such drawings: 
A quick-running assembly will perform best when properly centered. Even a small runout can cause strong vibration, damage to the connections, and play will occur due to the development of landing positions.
Lawn mower or trimmer from a drill on video
Chainsaw based
Here a frame is cooked from pieces of pipe. The engine from the chainsaw is focused on it. Due to its power, the lawn mower will overcome even small shrubs. The use of such an engine does not imply the presence of additional defense. It already has a powerful protection against moisture and dust. And his air filters get cluttered less often.
Suitable wheel assemblies have a 180 degree turn at the hinge. A separate functional unit is connected by belts with an independent chainsaw drive. The torque follows on the discs. There, the cutting tool is metal chains. Their length is 25 cm.
More:
- From an unnecessary chainsaw, the tire and the "steering wheel" are unscrewed.
- The handle is made from water pipes with the possibility of their regulation in height.
- An asterisk is taken from the chainsaw.
- A piece of a pipe 8 cm long and with a diameter of 5 cm is placed on it in the desired position. This segment is processed on a lathe.
- You will need another piece of such a pipe. Same length. Diameter = 5.8 cm. It is put on the previous piece. This results in a tubular telescopic shaft.
- For fastening pipes, special M6 bolts are required, equipped with lock nuts. The correct positions of the bolts are diametrically parallel to each other.
- Make several holes. This makes it easier to adjust the cutting height of the grass. The pipes will move relative to each other. And this movement slightly compensates for the imbalance.
After these operations, the knife base is prepared. A steel disc is welded to another pipe (steel - sheet). Its diameter is 18 cm.
Interestingly, such a modification can serve for years.
Lawn mower or lawn mower from Yuri Leskov
Vacuum cleaner based
The required details here are:
- wheels of large diameters (create a smooth free movement);
- welding equipment;
- two steel sheets;
- saw/hacksaw.
Execution instructions:
- A platform is cut out from the indicated sheets. It will house the engine from the old vacuum cleaner. The engine will focus its shaft in the lower area. The engine also needs a protective casing. Casing thickness - 1.2 mm. Holes are made in it 4 mm larger than the shaft. The engine is positioned 3-4 cm from the ground, otherwise the unit will break down during operation.
- A metal disk is placed on the motor shaft.
- The knife is prepared in several copies. A disk with a diameter of 3.8 - 4 cm is cut out of a metal sheet. The disk is put on the gross disk end and welded to it.
Capture width - 25 cm maximum.
Pros of a homemade model:
- Saving money.
- Environmental friendliness.
- The height of the knife cannot be controlled.
- Weak security.
- High probability of breakage.
These disadvantages are not difficult to eliminate. It is important to have the necessary skills here.
- The knife will dull less often if it is made of high quality steel.
- To keep the motor shaft intact, the knife needs to be sharpened unevenly. It should be sharp towards the edge. The place with which it touches the shaft cannot be touched, since the grass near the attachment site of the knife and shaft is cut rather poorly, but only imposed on the knife.
- You can arrange the regulation of the handle in length.
- The knife can be protected from contact with the ground. To do this, you need to make safety bumpers.
- For cut grass, a special collector can be provided.
- Before turning on the unit, you need to carefully check its condition: the sharpness of the knives, the reliability of the fasteners, the free movement of the wheels.
- Before work, clean the working area: eliminate debris, stones, pieces of wood. They may damage the machine or injure the mower.
- Keep children and animals out of the work area.
- When working, push the unit away from you.
- During a pause in operation, disconnect the unit from the power supply by pulling the plug from the socket.
- Do not work in rain or on wet surfaces.
- Clean or repair the unit only after its mechanism has thoroughly cooled down.
- Experts recommend making a blocking button in the device. It will act if the knife is damaged or jammed. Here is the diagram:
Types of lawn mower repairs
Petrol modifications. They are extremely difficult to make. But the main thing is to know typical malfunctions, to be able to identify them and replace elements. Many household models are equipped with gasoline two-prong internal combustion engines. In homemade products, you can find motors from drills, chainsaws, etc.
The most common problem is related to:
- engine start,
- lack of movement
- huge vibrations at work.
The motor starts, holds speed, there is no rotation of the knives. This is a mechanical problem. Check fasteners to the output motor shaft. If it's broken, replace it.
The engine does not start well, but it works stably. This is a problem with carburetor idle technology. It may also be the wrong proportions of the combustible composition. Mix fuel with oil in the correct ratio. If it doesn't help, remove the carburetor and adjust the idle technology.
The engine does not start well and does not work well. Here you need to check the carburetor. Possible blockage in the fuel jets. Filters can also become clogged: fuel and air. They should be changed, and the jets should be blown.
The engine starts well, but does not cope with the load. This is an air filter problem. It needs to be cleaned or replaced.
The gasoline engine does not start even with a high-quality fuel supply. This is a problem with the ignition technology. Coil needs to be checked. In case of visible violations, it must be replaced. There may be a dilemma in candles. You need to diagnose each candle. They can be replaced.
Prevention
It is also very important to monitor the condition of the carburetor. It needs to be cleaned periodically. Its casing is dismantled. The screws are loosened. It comes out of the plastic. Garbage (if any) is removed from it. There is a cover under the casing. Below it is a carburetor. He is filming. First, the fuel hose is disconnected (the fuel tank and the carburetor communicate through it). It may leak fuel. You need to be more careful. The carburetor is removed, held on a pair of bolts. Next comes the analysis.
The bolt holding the fuel compartment cover is unscrewed. When cleaning, special tools are needed. WD-40 is fine. It is necessary to clean the fuel channels of this mechanism well. A thin copper wire is required. Cleaning begins with the fuel compartment. The mechanism is heavily soaked. The carburetor is left alone for a short time. This process is repeated several times. Channels are cleaned with copper wire. Let's pressurize them. After these operations, the mechanism is assembled in the reverse algorithm.
Clogged compartments and channels are the most common cause of engine problems. Constant monitoring of their cleanliness will seriously extend the life of the engine and make it work more efficiently.
Repair on video
By Valery Rudenko.
The question of how to make a trimmer with your own hands is always relevant among owners of private houses with a small plot of land. A neat and well-groomed lawn near the house is not only beautiful, but also safe in terms of the absence of ticks on it.
About what was said earlier, today the question will be considered - how to make a trimmer with your own hands from the most available means for this.
Today on sale you can find various options for trimmers, powered by both electricity and gasoline. However, it is not always possible to buy a trimmer, and in most cases, it is not so necessary.
The advantages of a homemade trimmer from a drill or grinder is that when you need to mow the lawn near the house, the trimmer is easily assembled. When not needed, the drill or grinder is removed from the trimmer and used for its intended purpose.
How to make a trimmer from a drill and grinder
In order to make a trimmer from a drill, you will not need a lot of materials and tools. You will also not need to disassemble the drill in order to make a manual trimmer out of it with your own hands.
In addition, a cordless screwdriver can serve as a replacement for a drill, which can be connected to a car battery to increase the duration of the trimmer.
The main requirements for a homemade trimmer are primarily for its safety. The knife of a homemade trimmer is very sharp, so the presence of a protective cover on the trimmer is a must.
The same applies to the trimmer handle, on which the drill will be fixed. The handle must be made of durable materials, of course it can also be made of wood, but it is better to use an aluminum pipe for this purpose.
In addition, working with the trimmer after its assembly should be not only as safe as possible, but also convenient. Therefore, be sure to adjust the trimmer holder to your height, maybe install an additional handle on the side of it, etc.
First, the trimmer handle is prepared, on which the drill should be fixed. To fix the drill, you will need long bolts and metal clamps. Be sure the power cord of the drill must be tied to the trimmer handle. It is impossible for the wire to hang out and be a danger if it gets under the cutting element of the trimmer.
The knife of a homemade trimmer is attached to the drill with a nut and bolt, which is clamped in the cartridge. Be sure to remember to install a protective cover on the trimmer before this in order to ensure your own safety while mowing grass.
A trimmer knife can be made from tool steel or some other very durable material. You should know that the thinner the trimmer knife is, the better it will cope with cutting grass. The length of the trimmer knife depends primarily on the protective cover and the cutting width of the grass to be cut. Most often, the length of the trimmer knife does not exceed 30 centimeters.
The question of how to make a trimmer from a grinder with your own hands is solved in approximately the same way as the above-described production of a trimmer from a drill. There is only a slight difference in the attachment of the grinder to the holder. A metal pipe can be chosen as a trimmer handle, to which a plate with a hole for fixing the grinder with a bolt must be welded at the end.
Small changes also affected the knife of a homemade trimmer. In the case of using a grinder, here the knife is not in the form of a long rectangle. The knife of a homemade trimmer from a grinder is made of a disc for concrete, with sharp edges pre-cut, which are just designed for mowing grass.
The question of how to make a trimmer from a drill or a grinder is completely solved on our own. The main thing is not to forget about safety precautions and carefully study this issue.
Only after that, you can safely take on the manufacture of a trimmer with your own hands.
This, of course, is not an “industrial” model, but the very principle of manufacturing a trimmer can be taken for a more powerful model. I was somewhat strained by the blades and the way they were attached. Still, it is necessary to be more reliable, otherwise, in the event of a separation at high speeds, it can seriously injure the observer or the mower himself. As a security element, I would not put a switch, but a button. So that if a do-it-yourself trimmer falls out of your hands, it stops and does not injure anyone.
It's nice that the author of this video finds a use for ordinary things and turns them into something useful. Well, if, like mine, the trimmer broke down, then this project will completely allow you to make a temporary replacement for it with your own hands. So, clean up the lawn.
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