How to make a trimmer from a grinder. Grinder trimmer

The question of how to make a trimmer with your own hands is always relevant among owners of private houses with small land plot. 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.

This was discussed earlier, but today we will consider the question of how to make a trimmer with your own hands using the most readily available means.

Today on sale you can find various options 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 advantage of a homemade trimmer made 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

To make a trimmer from a drill, you don’t 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 replacement for a drill can be cordless screwdriver, which can be connected to a car battery to increase the trimmer's operating time.

The basic requirements for a homemade trimmer are primarily related to its safety. The knife of a homemade trimmer is very sharp, so the presence protective casing 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 these purposes.

In addition, working with the trimmer after its assembly should not only be as safe as possible, but also convenient. Therefore, you should definitely adjust the trimmer holder to your height, maybe install an additional handle on the side, etc.

First, prepare the trimmer handle on which the drill should be secured. To secure the drill, you will need long bolts and metal clamps. The power cord of the drill must be attached to the trimmer handle. The wire must not dangle and pose 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 a chuck. Before doing this, be sure to remember to install a protective cover on the trimmer to ensure your own safety while mowing the grass.

The trimmer blade can be made from tool steel or other very durable material. You should know that the thinner the trimmer blade, the better it will cope with cutting grass. The length of the trimmer blade depends primarily on the protective cover and the cutting width of the grass being cut. Most often, the length of the trimmer knife does not exceed 30 centimeters.

The question of how to make a trimmer from an angle grinder with your own hands is solved in approximately the same way as the above-described manufacture of a trimmer from a drill. Here there is only a slight difference in attaching the grinder to the holder. Can be selected as a trimmer handle metal pipe, to which at the end you need to weld a plate with a hole for fixing the grinder with a bolt.

Small changes also affected the homemade trimmer knife. In the case of using a grinder, 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 pre-cut sharp edges, which are specifically designed for mowing grass.

The question of how to make a trimmer from a drill or grinder can be solved independently. The main thing is not to forget about safety precautions and carefully study this issue.

Only after this, you can safely take on making a trimmer with your own hands.

On the farm, a lawn mower is not an essential device. Its need especially affects summer cottage, during the harvest period and during the rest season.

Every normal owner wants to have a beautiful, well-groomed one on his site. Here you will have to work hard with a scythe, purchase a high-quality lawn mower, or assemble this device yourself. In the latter case, its composition will be as follows:

• engine,
• knives,
• comfortable handle.

The engine will need power, so you will need a very long cord with a plug, and also a switch. You can make the work easier if you attach wheels to the bottom of this technique. This whole thing has to be held together somehow. This function will be performed by the frame.

Process of creation

The initial stage of creating a lawn mower yourself is to select parts. The most important thing is the presence of an engine. It can be taken from an already unused household appliances, can be removed from any power tool:

• drills,
• vacuum cleaner,
• chainsaws,
• Bulgarians.

The minimum required motor parameter is 500 V. Better than 1000 V. This way you can work at low speeds. And sharpening knives will become a less common task. The selection of the engine is influenced by the diameter of the knife and the overall dimensions of the equipment. The larger the working area for it, the higher the engine power should be.

cutting part

The key component of the mechanism is the knife. Its quality determines the service 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. Make a hole in the center where the screw will go. The knife will be sharpened on both sides. Its shape can be made slightly curved.

Another version of the knife is a compound one. The steel strip is attached with bolts or by welding a pair of metal pieces, sharpened to the maximum. The 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 shape of a solid round disk. It also needs to be sharpened well. This form, unlike other forms, when colliding with a stone or stick, will withstand such attacks and not be damaged.

Pen

The handle for the device being prepared 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.

Electrics

The power cord can be removed from any unnecessary household appliance. If its length is short, you can use extensions.

Wheels can be borrowed not only from a stroller, but also from an old vacuum cleaner.

Build process

For the frame you need a piece of metal or plywood with a thickness of 8 mm. Here you will need to create a protective metal casing. This will reduce the likelihood of your lawn mower breaking down.

The necessary tools are here:

• welding equipment;
• hacksaw (metal type).

1. First, the frame for the motor is prepared. Although plywood is suitable, it is better to take a sheet of metal at least 3 mm thick. It is more resistant to deformation. The size of the frame is determined by the length of the knife 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. Holes for the motor are created in the center of the square. The flange motor must be attached to the frame with the shaft facing down. If the engine has ears, another mount is welded to the frame.
2. To make the simplest casing, a metal tin can is used. It is better to make the casing high, so it will also protect the electrics of the lawn mower. It needs to be put on the motor shaft. Then put on a knife (carefully sharpened). The entire mechanism is connected with 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 it goes lower, it will remain in the ground. If it is higher, it will crush the grass rather than cut it.

Frame example (photo):

1. The handle needs to be adjusted to suit the height of the main user of the future lawn mower. Its optimal length is about 90 cm.

After this assembly, all that remains is to connect the power cord.

Advice! You can protect yourself from cut grass by attaching a mesh over the lawn mower.

The most primitive homemade lawn mower

Made practically from scrap metal.

Lawnmower based on an old washing machine

As you know, Soviet “washing machines” were stamped from strong metal. Their engines are optimally matched in terms of performance and power for the intended lawn mower.

The superior steel body will act as a defensive skirt and guide when flipping the grass to the side.

It also uses two pulleys and a belt that transmits impulse from the engine to the knife mechanism. The motor is mounted on a platform and connected to only one phase.

Such a unit will work in an area near the house, since it is connected to the network with an electrical 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 directed into the network.

Such units are suitable for working 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 swath width. Overloading the motor is not allowed. Such a drill generates the required torque, and the grass is easily mowed. It is necessary to pause while working so that the engine can “rest.”

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 tips over.

If you intend to create a more powerful modification with parameters of 1500 - 6000 W, then installing the engine will go to a special sole. A suitable motor is asynchronous: it makes less noise.

The chassis consists of metal wheels covered with rubber. They have a wide projector. This way the grass will wrinkle less. And here the bearing assemblies in the axial bushings are stronger than plastic bushings.

The deck and knife are created from old frying pan and a steel plate (steel - tool). This knife mounting design is highly efficient. It is important not to disturb the relationships and profile of the sharpened edges. When working, it is better to adhere to the following drawings:

The high-speed unit will work better if properly aligned. Even a slight runout can cause strong vibration, connections will be damaged, and backlash will occur due to the development of seating positions.

Lawn mower or trimmer from a drill on video

Chainsaw based

Here a frame is welded from pieces of pipe. The engine from the chainsaw is focused on it. Due to its power, the lawn mower will overcome even small bushes. The use of such an engine does not imply the presence of additional defense. It already has powerful protection against moisture and dust. And his air filters become clogged less often.

Suitable wheel assemblies have a 180 degree rotation on the hinge. A separate functional unit is connected by belts to an independent chainsaw drive. The torque goes to the discs. The cutting tools there are metal chains. Their length is 25 cm.

More details:

1. The tire and “steering wheel” are unscrewed from an unnecessary chainsaw.
2. The handle is made from water pipes with the possibility of height adjustment.
3. The “star” is taken from the chainsaw.
4. A piece of pipe 8 cm long and with a diameter of 5 cm is placed on it in the desired position. This piece is processed on a lathe.
5. You will also need another piece of such pipe. The length is the same. Diameter = 5.8 cm. It fits over the previous piece. This creates a pipe telescopic shaft.
6. To fasten the pipes, special M6 bolts equipped with locknuts are required. The correct positions of the bolts are diametrically parallel to each other.
7. 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 disk (steel - sheet) is welded to another pipe. Its diameter is 18 cm.

Interestingly, such a modification can last for years.

Lawn mower or walk-behind mower from Yuri Leskov

Based on a vacuum cleaner

The required details here are:

• wheels of large diameters (create smooth free movement);
• welding equipment;
• two steel sheets;
• saw/hacksaw.

Instructions for implementation:

1. A platform is cut out from these sheets. It will house the motor from an old vacuum cleaner. The engine will concentrate its shaft in the lower area. The engine also needs a protective casing. The thickness of the casing is 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 during operation.
2. A metal disk is placed on the motor shaft.
3. 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 shaft disk end and welded to it.

Working width – 25 cm maximum.

Advantages of a homemade model:

1. Saving money.
2. Environmentally friendly.

1. You cannot control the height of the knife.
2. Weak level of security.
3. High probability of breakdown.

These disadvantages are not difficult to eliminate. It is important to have the necessary skills here.

1. A knife will be less likely to become dull if it is made of high quality steel.
2. To keep the motor shaft intact, the knife needs to be sharpened unevenly. It should be sharp towards the edge. The place where it touches the shaft cannot be touched, since the grass near the area where the knife and shaft are attached is cut rather poorly, but only gets stuck on the knife.
3. You can adjust the length of the handle.
4. The knife can be protected from contact with the ground. To do this you need to make safety bumpers.
5. A special collection box can be provided for mown grass.
6. 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.
7. Before work, clean the work site: remove debris, stones, and pieces of wood. They can damage the machine or injure the mower.
8. Remove children and animals from the work site.
9. When operating, push the unit away from you.
10. When there is a pause in operation, disconnect the unit from the power supply by unplugging the plug from the socket.
11. Do not work in rain or on wet surfaces.
12. Clean or repair the unit only after its mechanism has completely cooled down.
13. Experts recommend making a locking button in the device. It will operate if the knife is damaged or jammed. Here is the diagram:

Types of lawn mower repairs

Gasoline modifications. They are extremely difficult to repair. But the main thing is to know typical faults, be able to identify them and replace elements. Many household models are equipped with gasoline two-pin internal combustion engines. In homemade products you can find motors from drills, chainsaws, etc.

The most common problem is related to:

• starting the engine,
• lack of movement,
• huge vibrations at work.

The motor starts, holds speed, but the blades do not rotate.. This is a mechanical problem. Check the fasteners to the output motor shaft. If it is broken, replace it.

The engine starts hard, but runs stably. This is a problem with the carburetor idle technology. It may also be the wrong proportions of the combustible composition. Mix fuel and oil in the correct ratio. If this does not help, remove the carburetor and adjust the idle speed technology.

The engine starts poorly and runs poorly. Here you need to check the carburetor. There may be a blockage in the fuel nozzles. Filters can also become clogged: fuel and air. They should be changed and the jets should be blown out.

The engine starts well, but cannot 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. Need to check the coil. If there are visible violations, it must be replaced. There may be a dilemma here in candles. We need diagnostics for each spark plug. 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 unscrewed. It comes out of the plastic. Garbage (if any) is removed from it. There is a cover under the casing. The carburetor is located underneath it. He's filming. First, the fuel hose is disconnected (the fuel tank and carburetor communicate through it). Fuel may leak from it. You need to be more careful. The carburetor is removed and held in place by a pair of bolts. Next comes its analysis.

The bolt holding the fuel compartment cover is unscrewed. When cleaning you need special means. WD-40 will do just fine. It is necessary to thoroughly clean the fuel channels of this mechanism. A thin copper wire is required. Cleaning begins with the fuel compartment. The mechanism is soaked abundantly. The carburetor is left alone for a short time. This process is repeated several times. Copper wire channels are cleaned. Let's blow them under pressure. After these operations, the mechanism is assembled using the reverse algorithm.

Clogged compartments and channels are the most common reason engine problems. Constant monitoring of their cleanliness will significantly extend the life of the engine and make it work more efficiently.

Repair on video

Valery Rudenko reports.

I secured the grinder to an ordinary hoe with no less ordinary tape. Instead of a standard disc for an angle grinder I installed old disk from a circular saw suitable sizes. I tried to mow. It’s normal, but you need to secure the cord to the handle so that it doesn’t interfere and doesn’t get caught under the “braid.”

I was pleased. The only thing I added later was to increase the diameter of the saw blade. With a larger diameter it cuts faster. And since I had to remove the protective cover, the grass stopped accumulating under it. I still recommend that if you decide to make such a “lawn mower”, make a homemade casing, larger, it will still be safer. By the way, the grinder has factory threaded mounting holes for attaching the handle in different positions. You can use them to attach the grinder to homemade frame on wheels, which will make your lawn mower more like a real one :). You can take a finished frame on wheels from a baby stroller, and weld a bar with holes on top of it, to which you can attach the grinder. That's all, I told you how to quickly and easily make a lawn mower or trimmer with your own hands at home. This homemade lawn mower can cut not only grass, but also shrubs.

Be careful when operating this lawn mower and follow safety precautions. Make sure that the drive cord does not fall into work area, this can lead not only to damage to the wire, but also to shock electric shock. Work not allowed open disk near your feet, this may cause injury. Do not use this trimmer in the presence of small children. Their behavior may be unpredictable, in which case you may not have time to turn off the device.
Note: Buy talking and singing toys

Summer is coming and the grass has already grown noticeably, so far this is not critical, but you should already think about how to cut it. I'll show you how to make a simple trimmer out of an angle grinder to cut the grass. More precisely, it will be a special device into which the grinder will be installed. After mowing, it can be removed again and used for its intended purpose. There is little point in buying a ready-made trimmer if you only need it 1-2 times a season.

How to make a trimmer from an angle grinder with your own hands

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 lawn mower that is suitable for its performance and design. But there is another option. If you have a medium-power electric motor lying around on the farm, then after spending a few evenings, you can easily turn it into a simple and convenient homemade lawn mower, saving not such a small amount of money that you would have to pay for a branded lawn mower - and even enjoying creativity.

General structure of the lawn mower

• Engine.
• The frame on which all mower components are attached.
• Knives.
• Protective casing.
• Wheels.
• Handles for control.
• Control system parts: 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 made of metal corners. The engine is attached to the sheet at the top, a protective casing at the bottom, an axle for the wheels on the sides, and handles for control.

If the motor is flanged, it can be attached directly to the sheet by drilling holes in the latter that coincide with the holes in the flange. If the engine is of a conventional design, two perpendicular corner posts must be welded or screwed to the sheet so that they coincide with the engine feet.

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 shifted relative to the frame when mounting, thus changing the distance from the knives to the ground. This design feature will be useful when selecting the optimal grass cutting height. But it’s easier to make holes for different engine height positions.

The central part of the lawn mower is the cutting unit, which consists of a mandrel with two short (or one long) knives attached to it.

Engine

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 plenty of information on connecting three-phase motors to a single-phase network on the Internet. It is not difficult to find formulas for calculating the required capacitance of capacitors. In practice, they take approximately 200 uF for a motor with a power of about 2 kW. For a power of 500-600 W, 60-80 uF is sufficient.

When making a casing for the engine, you need to provide holes for cooling the engine.

You can make a lawn mower with your own hands using a conventional electric drill with a speed of up to 3000 rpm. Coming up with a way to attach a drill to a frame is not that difficult. However, you need to understand that in terms of reliability and duration of continuous operation, the drill cannot be compared with asynchronous motor, so if you have a relatively large area to mow, 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 simple to mount the knife. The knife with the hole in the center is clamped with a nut on the bolt, and the bolt is clamped in the drill chuck.

Mandrel

The mandrel must be securely fastened to the motor shaft. This is usually done using bolts screwed into the flange perpendicular to the shaft axis.

You can use a stone holder for a sharpener as a mandrel.

To prevent grass from wrapping around the shaft, it can be covered with a tin can.

If a suitable pulley or other suitable parts are not found, you will have to order the manufacture of a mandrel from 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 pipe of suitable diameter, ensuring the perpendicularity of the welded strip or circle with respect to the pipe, and centering the mandrel after its manufacture. With some effort, all these problems can be solved.

Knives

The design 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 relative to 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 cutters. In this case, the knife and the mandrel 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 attached to the edges of the mandrel at an angle of 180° to each other. They can be positioned straight or with a slight slope. The knives can be secured 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 folding knives must be inspected regularly, because... Over time, the screws may wear out.

The steel for knives must be sufficiently hard, but not brittle, otherwise the knives may break, which will not only require their replacement, but also create the risk of injury from a flying piece. The experience of amateur craftsmen shows that wood hacksaw blades 2 mm thick are very suitable as a material for lawn mower blades. The technology for making a knife from them is simple. Two strip-shaped blanks 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 workpieces. After this, all that remains is to sharpen the knives, attach them to the frame and center them.

If drilling holes is problematic, then you can lay the canvas on metal surface with a hole of a slightly larger diameter than the hole in the canvas should be, and hit it with a punch. The protrusion formed after the impact is removed with a file (if the metal is soft enough) or with a sharpener. If the hole doesn't respond required diameter, the process is repeated.

In essence, there are many options for making functional knives, as well as materials for making them. The main thing is to sharpen them well, center them (so that there is no vibration) and securely fasten them. When attaching knives to the mandrel, you need to use lock washers and locknuts. Without this, the mounting bolts will unscrew due to vibration.

If possible, it is better to make the cutting edges slightly curved down, like on branded lawn mowers. This will reduce the grass from wrapping around the motor shaft. Or you can make a disk 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

There is no clear opinion about what number of wheels is optimal - 2, 3 or 4, among craftsmen operating 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 lawn 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 the wheels yourself, for example from plywood and bearings, so the last argument is not so convincing. Ultimately, the choice remains with the master himself.

If a two-wheeled lawn mower is selected, there must be protection against the rotating blade touching the ground.

If you choose a three-wheeled lawn mower, then two wheels should be on the handle side so that you can lift the front of the mower for a turn by pressing on the handle.

The larger the wheel diameter, the better. A lawn mower with small wheels is more difficult to push through grass.

At the end of the article there is a video demonstrating the operation of the second lawn mower.

Without a bag, the grass will be laid in the direction specified by the cutout. Without a hole in the casing, the grass will be crushed, this will be mulching. But for all this you need a fairly powerful engine, and in order to avoid cutting grass from stuffing into the engine, the space between the engine and the knives must be covered with a disk.

Working with the mower will be safer if one of the handles is equipped with a lever that, when released, turns off the power supply to the engine.

Security measures

It is necessary to carefully insulate all electrical wire connection points - both on the engine itself and on the control parts. The insulation on the supply cable must not be damaged. For food electric motor It is necessary to have a double insulated cable with at least 3 cores. The mower body is reliably grounded, for which one of the cable cores is used. Or they connect the lawn mower to the network 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.

Do not operate the mower without a protective cover. When working, you need to 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 in some designs of homemade lawn mowers, the front area of ​​​​the mower remains open. It is advisable to mow in rubber boots. This will protect you from the consequences of falling into various objects that are thrown away by the rotating knife.

Do not use the mower in wet weather or early in the morning when there is dew.

Below is an example of a homemade lawnmower gone wrong.

The engine is completely open, and there is no homemade casing for it, not even a protective disk on the blade side, although there is a huge hole there. There is no cover to protect the lawnmower from flying blades or thrown stones. The handles are welded and their tilt cannot be adjusted; in addition, they cannot be removed when storing or transporting the lawn mower.

Video of DIY lawn mowers:

Homemade lawnmower from a basin

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