After I had a drilling machine in my garage, it became necessary to sharpen drills, it is inconvenient to do this with a grinder, and the whole civilized world does it with emery. Shortly before that, I had an engine from washing machine, such an ancient machine, round, it looks like a barrel, I can’t tell you what it’s called.

Detail drawing.

I carefully examined the engine, twisted it by the shaft, made a test run. Indirectly estimated the power by applying a load to the shaft. Moreover, I heard more than once that these engines will be used as emery, and I saw it too. I drew blueprints, ordered parts for production at the factory, and proceeded to assembly.

3d model of emery.

To attach the stone to the shaft, I developed a bushing with a standard fitting diameter, it was also machined for me along with a clamping washer. I also needed an M20 nut, but this was no problem at all. I fixed the bushing on the motor shaft with two set screws.

Hub drawing.

Puck drawing.

I connected the starting winding of the engine through a button, so it seemed to me easier at that time. That is, to start the emery, you need to turn on the main winding toggle switch, and then briefly press the start button. Emery has been working properly for six months now.

Emery appearance.

Rar archive of drawings in compass format V9

How do homemade emery

Flange manufacturing

How to make homemade emery? Emery is an indispensable item in household. With it, you can sharpen knives, drills, scissors, various cutting tools that need to be sharpened periodically.

Emery can sharpen knives, scissors, drills and cutting tools.

sharpening tool cost construction stores very high. Therefore, you can make an electric emery with your own hands.

How to make homemade emery

Materials and tools:

electric motor from washing machine;
nozzles;
switch;
capacitor;
wiring;
insulating tape.

A home craftsman can make an electric homemade emery from improvised tools that are in the house. An electric motor is used to assemble the device. The necessary nozzles are mounted on its shaft to fix the emery wheel.

If you have an engine in your house from an old washing machine "Vyatka", "Siberia", then it can be used to make a sharpener. These motors have a lot of power. You can also take a switch equipped with a special starter from the washing machine.

Scheme of the emery device.

However, it is quite difficult to make a sharpener from such an electric motor. Problems will arise when it is necessary to put a grindstone on the motor shaft. The fact is that the engine is not always threaded. In addition, the diameter of the hole of the stone may differ from the diameter of the shaft.

The work will need a certain turned part, thanks to which these problems will be solved.

Before proceeding with the manufacture of the device, it is necessary to determine its future parameters. To make homemade emery, an asynchronous motor is usually used for an electric sharpener.

For this device, an electric motor with a speed of 3000 rpm is suitable. If the speed is too high, the grindstone may break. Therefore, in a home workshop, it is better to use a device with an engine that has 1000-1500 rpm.

If you still decide to put an engine with a speed of 3000 rpm, then you need to put a heavy-duty grindstone and a high-quality flange. Such emery can be successfully used for polishing wood.

The motor power must be up to 400 watts. You can also use devices with a power of 100-200 W, only they have a small number of revolutions.

Electric motors can be used not only single-phase, but also three-phase. Both types can be connected to a conventional network, only a capacitor is used to connect a three-phase device.

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Flange manufacturing

In order to connect the engine and the grindstone, it is necessary to machine a special flange. To do this, you can order the work of a turner, providing him with the drawings of the grindstone, the dimensions of the shaft section and the diameter of the grindstone hole.

You also need to grind the following details:

Drawing for the manufacture of a flange for emery.

flange put on the shaft axis;
bolt;
screw;
washer with left-hand thread.

On the flange and nut, threads must be cut, depending on which direction the engine rotates. If the shaft rotates clockwise, the thread must be left-handed. If counterclockwise, the cutting is right-handed.

This is necessary so that during the processing of tools, the emery nut is independently twisted. If the nut is untwisted, the stone may fall. During operation, it is very dangerous for others.

If you could not make bushings of the desired diameter, then you can use pieces of pipes of the same diameter. In this case, it is possible to fill the gaps between the shaft and the bushings by winding a fabric insulating tape.

The sleeve is made from a pipe with a diameter of 32 mm. It should correspond to the diameter of the circle of emery. An emery wheel is installed on it so that it sits close.

This bushing system must fit tightly on the shaft. Be sure to fasten with a bolt and washer.

You can cut the thread yourself with a tap, for this you need to clamp the shaft in a vice. In this case, it is important to correctly determine the diameter of the hole for a given thread.

Scheme of a homemade mini-emery.

Before proceeding with the manufacture of the device, it is necessary to clarify the direction of rotation of the rotor. For example, the motor from a washing machine is asynchronous. This means that the direction of rotation can be changed by switching the windings.

The engine from the washing machine usually has 3-4 outputs. Thus, with 4 leads, the direction of rotation can be easily changed.

To do this, use a tester to determine the working and starting windings. Most often, the resistance level of the working winding is 12 ohms. In the starting winding, this figure is 30 ohms.

The working winding of the motor is connected to a power supply network with a power of 220 W. The starting winding is turned on with the first end to the output of the coil, and the other end must be quickly touched to the second output and immediately torn off from it. A relay is used for this operation.

If a capacitor motor is installed, then the connection diagram of the device will be different.

This means that during operation, the sharpener will spin in a certain direction. If you then rearrange the conclusions of the starting winding from place to place, the device will begin to rotate in the other direction.

You can not use the starting coil. Then, after connecting the device to the network, it will be necessary to turn the grindstone in the right direction, after which the device will start working.

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Assembly of the device and safety measures

After assembling the structure of the device, it is necessary to install the device on the workbench. This can be done using the bracket from the washing machine. It must be attached to the workbench with bolts.

On the other hand, the engine rests on an angle to support it horizontally. This corner has a special cutout that matches the shape of the engine.

You can reduce the vibration of the instrument during operation. To do this, put on the corner a special edging made from a piece of rubber hose.

To comply with safety precautions during sharpening, it is necessary to make a metal casing for the device. It is made from sheet metal 2-2.5 mm thick. To do this, cut a strip of metal and roll it into a half ring.

A piece of galvanized sheet metal should be installed under the abrasive stone, which will protect the workbench from sparks during the operation of the apparatus.

Work on sharpening tools on homemade emery must be done in goggles and observe all necessary safety measures.

You can make special tools for sharpening. It is necessary to prepare plexiglass 5 mm thick. Attach it with hinges to the motor casing. This glass must be tilted 180°.

For the convenience of performing work, you need to make a handyman. It is necessary for the stop of the processed tool.

If you follow this instruction, you can independently make an electric emery that will successfully process necessary tools and will last a very long time. When operating the device, be sure to observe safety measures.

How to make emery with your own hands? DIY emery (drawings)

Quite often, home craftsmen feel the need to use emery. It may be required when knives or scissors become dull, as well as other cutting tools requiring sharpening from time to time. Many specialists are in no hurry to purchase such equipment for the reason that it is very expensive. There is no need to talk about private consumers who use such equipment not as often as professional craftsmen.

Self-made emery

Emery with your own hands can be made if you have an engine from the old household appliances, it can be applied to business. First you need to choose Electrical engine, which would be suitable for the manufacture of the described equipment. Quite often, engines from old washing machines of the Vyatka9raquo;, Volga9raquo; or "Siberia9raquo;. Such a technique has a fairly powerful motor.

Among other things, you can borrow a switch from a washing machine that has a starter. Despite the fact that carrying out these works may seem quite simple, it is very difficult to make emery with your own hands. For example, one of the main issues is how a grindstone can be mounted on the motor shaft. This is due to the fact that there is not always a thread. In addition, the diameter of the hole in the stone may not match the diameter of the shaft. For this reason, a special turned part must be prepared.

Defining parameters

In order to make emery with your own hands, you must first determine its parameters. Quite often, asynchronous motors are used to make such an installation at home. For emery, you can apply the maximum speed, which is equal to 3000 rpm. If you use a more impressive speed, you may encounter the problem of breaking the grindstone. It is preferable to use a motor at home, which has a speed in the range of 1000-1500. If you use an electric motor at 3000 rpm, then you need to prepare a sufficiently strong stone. Among other things, a high-quality flange will be needed. Most often high speed motors are not used for sharpening, but for polishing parts.

In order to make emery with your own hands, it is not necessary to use a powerful electric motor. For a homemade grinder, a more acceptable power is the limit of 100-200 watts. Three-phase and single-phase electric motors can be used.

Flange preparation

Before you make emery with your own hands, you need to think about how to ensure the connection of the engine with the stone. For this, a flange is prepared. When carrying out this kind of work, it is preferable to use the services of a turner. But the rest is already a matter of technology and the question of the availability of improvised materials. It is necessary to prepare a flange, which is mounted on the shaft, and also reinforced with a washer. It should be noted that threads must be prepared on the nut and flange depending on the direction of rotation of the motor shaft.

If, when making emery with your own hands, the drawings of which are to be considered before the start of work, you will use a system in which rotation occurs clockwise, then a left-hand thread should be prepared and vice versa. If this factor is not taken into account, then the nut will work for unwinding. This will certainly lead to the fact that the stone can fly off. If there is no specific diameter for the manufacture of bushings suitable equipment, pieces of pipes can be used, and the resulting gap between the shaft and the motor bushings must be compensated for by twisting from electrical tape. You should choose one that has fabric base. It is necessary to put the bushings one on top of the other. At the same time, when winding electrical tape, uniformity must be observed.

When making emery with your own hands from a washing machine, the sleeve must be made using a pipe with a diameter of 32 millimeters. It should be put on an emery wheel. Such a bushing system will be firmly attached to the shaft.

If the work is done at home, then you can prepare the thread with a tap, while you will need to clamp the motor shaft in a vice. Before you make emery, you need to determine the direction of its work. It is very important.

In handmade emery, you can adjust the direction of rotation of the rotor. You will need to find the starting and working winding with a tester. The winding resistance level is quite often 12 ohms, but the starting winding approaches 30. The working winding must be connected to a 220 volt network, but the starting winding must be connected at one end to the coil output, while the other must be touched to the second winding output, and then discarded his.

Tool manufacturing features

Do-it-yourself electric emery is quite often made at home without using a starting coil. In this case, after turning on the winding in the network, it is necessary to run the abrasive stone in a certain direction with the help of hands, after which the machine will work independently.

Carrying out the installation of emery

Let's look at how to make emery from a washing machine with your own hands. First you will need to determine how to properly install it on a workbench. This can be done using a bracket that is removed from the washing machine. Fastening can be done with bolts. The motor on the other side rests on an angle that keeps it horizontal. Among other things, it has a cutout that completely repeats the outline of the motor housing.

In order to reduce the force of vibration, you need to put on an edging made of a rubber piece of hose at the corner. To avoid injury from a running saw and flying fragments of an abrasive wheel when using a machine, you can use the casing method. It is preferable to make it from steel. For this, you need to choose a canvas whose thickness is 2.5 millimeters. It can be a strip of metal that needs to be rolled into a half-ring shape. Under working surface emery wheel, it will be necessary to fasten a galvanized sheet element, which will protect the workbench from the effects of flying sparks generated during operation. All actions for your own safety should be carried out with the help of special glasses.

Finally

As fixtures for equipment, you can use plexiglass, the thickness of which should be equal to 5 millimeters. It is fixed on the engine casing, while it is necessary to use a hinge. Fastenings should be carried out in such a way that it is possible to tilt the element by 180 degrees.

You also need to make a handpiece, which is necessary for a strong and reliable stop of the workpiece. All work can be done independently, without resorting to the help of a master. To do this, you will need to stock up on the appropriate tool and material. In addition, you can not do without the recommendations that were presented in the article.

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DIY emery

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thanks for detailed instructions! I have an old washing machine lying around in my dacha. It will be necessary to use a motor from it to create an emery machine. Unit

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How to make emery with your own hands

Of course, you have heard more than once about the benefits of emery in the household, even if you are not a fan of DIY crafts. After all, in every home there are knives, scissors and other piercing and cutting tools that require sharpening from time to time. But the price of emery in most retail outlets will not please you! And so why not think about self-manufacturing this incredibly useful tool?

Purpose of emery

Many people use drills to make holes in metal with drilling machine or drills. After a certain time, the drill starts to get very hot and it is worse to drill, due to the fact that it has become dull. And all this happens quite quickly if the drill is drilled at high speeds. There are cases when the drill breaks off in the middle if it is “bitten9raquo; when leaving the metal, and the part was not fixed.

Accordingly, working with a blunt tool is one torment. Nowadays, few people remember how tool grinders used to go home with small portable sharpeners and sharpen all kinds of tools, including knives. Nowadays, you can, of course, go to the store and buy absolutely new tool with factory sharpening, and you can also sharpen the drill at home.

To sharpen the drills, you should use a purchased grinding machine, and you can also sharpen it with a hand-made emery. A sharpening machine is a necessary and indispensable thing in the household. With it, almost any tool is sharpened, and it can also be used for grinding wood.

Every tool store sells electric emery. Quite a large selection of them. You can buy both a very small sandpaper in order to correct blunt cutting tools, and a fairly powerful one. grinder, with which you can grind off a large layer of metal from any part.

The best purchase would be a double-sided electric emery, on one side of which there is a finishing, and on the other rough grinding wheels. These injury prevention circles must have protective covers- in case of destruction or damage to the circle while the engine is running. It is also desirable that the electric sharpener has adjustable working stops for sharpened tools and spark-proof shields with protective glass.

Quite convenient are electric emery, in which the speed of rotation is adjustable. When removing a large layer, you need to use increased speed, and the “finishing” itself; cutting edge to do better at low speeds. This will, of course, eliminate the burning of the metal. From time to time, when sharpening a tool, it is necessary to cool it in a bath of water.

DIY emery

In the hands of every man there may be an engine from household appliances, and the question immediately begins to huddle in his head, how to make emery with his own hands from improvised materials. To do this, various electric motors are used, on the shaft of which nozzles specially machined on a lathe are installed, which are designed to clamp the emery wheel.

Motor selection

For this purpose, engines from old-fashioned washing machines are usually used, such as Volga9raquo;, Riga9raquo;, Siberia9raquo;, Vyatka9raquo; and so on. On such machines, the engines are quite powerful and reverse. Also, from such washing machines, switches with a starter are used.

Despite the fact that it seems quite simple, homemade emery is not at all easy to put together from an engine from a Soviet washing machine. For example, one of the main questions is how to put a grindstone on the motor shaft. After all, there is not always a thread there, and the diameter of the hole in the stone may not coincide with the diameter of the shaft.

Therefore, a special turned part is needed, which would compensate for this disproportion. To make homemade emery with your own hands, you need to know its future parameters. In most cases, for the manufacture of emery at home, usually asynchronous electric motors are used.

For emery, the maximum speed is about 3000 rpm. A grindstone at a very high speed can simply break. It is best to use an engine with 1000 - 1500 rpm at home. If a 3000 rpm electric motor is to be used, a fairly strong stone should be present and a quality flange made. Most often, high engine speeds are used not for sharpening, but for polishing products.

In order to make emery with your own hands, it is not necessary to use powerful electric motors for such purposes. Although experienced craftsmen say that for a homemade grinder, 400 W is acceptable power, and for home use an engine with a power of about 100 - 200 W from a Soviet washing machine is enough. Of course, he is a little resourceful, but it is very good.

You can use three-phase and single-phase electric motors to make emery with your own hands. Both are included in a single-phase network. The device is connected to single-phase network through the condenser.

Flange undercut

To connect the engine and the stone, you need to turn the flange. For such purposes, it is best to contact the turner with a drawing of emery, the dimensions of the inner diameter of the stone and the diameter of the motor shaft. And the rest is a matter of technology and the availability of improvised materials.

You will also have to grind the flange itself, which is mounted on the shaft, and also fixed with a bolt, and a nut, and a washer with a left-hand thread. It is also necessary to take into account that threads are cut on the nut and flange, depending on the direction of rotation of our motor shaft. If clockwise rotation occurs, then the thread must be left-handed, if suddenly the opposite is true, the thread must be right-handed. During the operation of the desktop emery, the emery nut will spontaneously twist. If this factor is neglected, the nut will work to unwind, and therefore the stone may fly off. And, of course, it is extremely dangerous.

What should be done if it is not possible to manufacture point bushings of a certain diameter? In this case, pieces of pipes of a suitable diameter may come in handy, and the gaps between the bushings and the motor shaft can be compensated for by winding fabric-type electrical tape between the bushings. In addition, you can put the bushings one on top of the other.

In this case, the most important thing when winding electrical tape is to maintain uniformity in order to avoid the formation of large beats during rotation. The sleeve is made from a pipe with a diameter of 32 millimeters, equal to the inner diameter of the emery wheel. An emery wheel is put on it directly, which could sit with an interference fit without winding.

Such a bushing system sits quite tightly on the shaft. But with the help of a bolt and washers, fixing is required. At home, in the shaft, you can cut the thread with a tap, while holding the motor shaft in a vice. In this case, it is necessary to determine the diameter of the hole correctly for the thread.

Direction of work

Before you make emery at home, you need to find out the direction of his work. In handmade emery, you can change the direction of rotation of the rotor. If, for example, the engine is from a washing machine, then it is asynchronous, that is, when switching the corresponding windings, you can change the direction of rotation. Also in motors from household appliances of old production there are 3 - 4 outputs. For example, with 4 pins, changing the direction of rotation is not difficult.

For these purposes, we find the starting and working winding using a tester. The resistance level of the working winding, as a rule, is 12 ohms, and the starting winding is close to 30 ohms. The working winding is connected to a 220 W network, and the starting winding is connected securely with one end to one output of the coil, and the other end must be briefly touched to the second output of the winding and then immediately discarded (usually special relays are used for this). If you are using a capacitor motor, then the switching circuit will be different.

This means that your emery will spin in one direction, and if, for example, you change the conclusions of the starting winding in places, then the engine will rotate accordingly in the opposite direction. In general, in principle, you can do without a starting coil, in this case, after turning on the working winding in the network, you need to turn the abrasive stone in a certain direction, and the machine will then work.

Installing emery

After you have made a homemade emery, you should figure out how to properly install it on a workbench. This is done using a bracket, which is also removed from the washing machine and bolted to the workbench. The engine, on the other hand, rests on an angle that supports it in a horizontal position, and also has a cutout that completely repeats the shape of the engine housing. To reduce vibration, a fringing made of a rubber piece of hose is put on the corner.

To avoid injury from the saw and flying fragments of the abrasive wheel when working on a do-it-yourself grinder, you need to make a casing. It is best to make it from thicker metal - 2 - 2.5 millimeters. It can be a strip of metal rolled into a half ring.

Under the working body of the emery, you directly need to screw a small piece of galvanized sheet iron, which will protect the workbench from sparks during operation. For your own safety, all work must be carried out with special glasses or other protection.

As devices for emery, you can use plexiglass, 5 millimeters thick. Such glass is attached to the engine casing with the help of hinges; it can be tilted 180 degrees. Also, for the usefulness of the machine, it is necessary to make a handpiece to stop the workpiece.

Of course, the benefits of an electric grinder cannot be doubted! After all, you will not use a new ax or drill every time. Yes, and buying emery for this is somehow expensive. But there is a way out, you just have to spend a little time and collect emery with your own hands. Follow our instructions carefully, provide the necessary protection for the machine and do not neglect the safety requirements during operation.

How to make homemade emery? Emery is an indispensable item in the household. With it, you can sharpen knives, drills, scissors, various cutting tools that need to be sharpened periodically.

Emery can sharpen knives, scissors, drills and cutting tools.

The cost of sharpening tools in hardware stores is very high. Therefore, you can make an electric emery with your own hands.

How to make homemade emery

Materials and tools:

an electric motor from a washing machine;
nozzles;
switch;
capacitor;
wiring;
insulating tape.

The work will need a certain turned part, thanks to which these problems will be solved.

Before proceeding with the manufacture of the device, it is necessary to determine its future parameters. To make homemade emery, an asynchronous motor is usually used for an electric sharpener.

If you still decide to put an engine with a speed of 3000 rpm, then you need to put a heavy-duty grindstone and a high-quality flange. Such emery can be successfully used for polishing wood.

The motor power must be up to 400 watts. You can also use devices with a power of 100-200 W, only they have a small number of revolutions.

Electric motors can be used not only single-phase, but also three-phase. Both types can be connected to a conventional network, only a capacitor is used to connect a three-phase device.

Back to index

Flange manufacturing

You also need to grind the following details:

flange put on the shaft axis;
bolt;
screw;
washer with left-hand thread.

On the flange and nut, threads must be cut, depending on which direction the engine rotates. If the shaft rotates clockwise, the thread should be left-handed. If counterclockwise, the cutting is right-handed.

This is necessary so that during the processing of tools, the emery nut is independently twisted. If the nut is untwisted, the stone may fall. During operation, it is very dangerous for others.

The sleeve is made from a pipe with a diameter of 32 mm. It should correspond to the diameter of the circle of emery. An emery wheel is installed on it so that it sits close.

This bushing system must fit tightly on the shaft. Be sure to fasten with a bolt and washer.

You can cut the thread yourself with a tap, for this you need to clamp the shaft in a vice. In this case, it is important to correctly determine the diameter of the hole for a given thread.

The engine from the washing machine usually has 3-4 outputs. Thus, with 4 leads, the direction of rotation can be easily changed.

To do this, use a tester to determine the working and starting windings. Most often, the resistance level of the working winding is 12 ohms. In the starting winding, this figure is 30 ohms.

If a capacitor motor is installed, then the connection diagram of the device will be different.

You can not use the starting coil. Then, after connecting the device to the network, it will be necessary to turn the grindstone in the right direction, after which the device will start working.

Do you have an old washing machine that is beyond repair? Do not rush to get rid of it, from this article you will learn how to make emery from the engine of a washing machine.

A homemade sharpener from a motor is always useful on the farm and for household needs. Moreover, industrial emery is expensive in stores, while a grinder from an automatic washing machine will cost free.

An emery machine is useful for such work:

Restoration of the cutting qualities of the drill. In order not to buy new drills, you need to know how to sharpen old ones. While working with a drill, the drill gets very hot, which is why it constantly becomes dull. Having sharpened it on the machine, you can use it many more times.
Sharpening of knives, scissors, shovels and other tools. Thanks to homemade machine from washing engine your knives will always be sharpened, and the scissors will cut perfectly. This does not require much effort.
If you replace the emery wheel with a polishing wheel, you can easily process products and parts.

Using the motor from the washing machine, you can make your own grinding machine. To do this, you will have to buy only one part - an emery wheel. All other components are in the motor.

Which engine is suitable for making emery

Wondering which engine to use? You can use any motor from a washing machine, even the Vyatka, Riga or Volga brands. The main thing is that it has enough power.

For normal operation grinder, enough power is 100-200 watts, with 1000-1500 rpm. For particularly large parts, a 400 W motor is suitable. But if the engine speed reaches 3000 rpm, it needs to be adjusted or a very strong disk installed.

What you need to create emery from a washing machine motor

To make a simple grinder you will need:

washing machine engine;
flange;
sleeve;
nozzle on the electric motor (emery wheel);
casing for protection;
support;
starting device.

When buying, it is better to choose a product with two circles: a finishing and a rough version.

You also need to make an adapter with a flange. Since the size of the shaft does not match the hole of the grindstone, an adapter must be made. You can perform it on a lathe, having previously determined the dimensions and completed the drawing. On the diagram, it is necessary to note the diameter of the shaft and the emery hole.

The flange on the shaft can be made independently. A piece of pipe with a diameter of 32 mm, no more than 200 mm in length, will do. It should ideally sit on the motor shaft. On one side of the flange, a thread is made, the direction of which depends on the direction of movement of the shaft. When sent to the engine, the other end of the flange is heated and pressed.

Be sure to secure the flange after installation. This can be done by welding or bolting by drilling a flange with a shaft.

The adapter from the shaft is ready. It remains to install the element for sharpening the cutters.

DIY steps for creating emery from a washing machine engine

For homemade device use a belt driven motor.

It remains to correctly assemble the device. After installing the flange, put on the shaft a nut with a washer, then a large emery wheel and again a nut with a washer.

Motor connection

How to connect the engine from the washing machine:

Using a tester-multimeter, look for tachogenerator wires that show a resistance of 70 ohms (usually they white color). We will not use them.
There are four wires left. Using a multimeter, you need to determine the paired wires.
Connect the wires leading to the stator and to the electric brushes. The remaining wires must be connected to the wire and plug at the end, and then connected to the network.
Connection points must be isolated.

Immediately after connecting, the motor for homemade emery will start working, and you will be able to evaluate the functionality of the device.

Connecting the electric motor of Soviet-made washing machines differs from the previous version.

Here you will find only 4 wires. Need to find a couple.
Take a multimeter, measure the readings of each of the wires. You need paired wires with less resistance that go to the working winding.
Connect these wires to the plug and connect to the mains.
Now you need to make a launcher. You can use any button, for example, from door lock. Connect one wire coming from the button to the starting wire (PO), and the other to the working wire (OB).

The motor is now connected. But before starting work, you need to thoroughly fix the machine in order to avoid an emergency.

How to put an emery machine and make protection

How to fix the emery machine and put protection on it? You can bolt it to a workbench.

To do this, use the bracket that is in the washing machine. To reduce vibration during operation, rubber gaskets are put on the corner, which can be made from a piece of hose.

If the device is installed on wooden workbench, cover it with a sheet of metal on top to avoid fire.

For your own protection, when using the machine, install a metal arc over the disc. You can also enhance the protection by attaching 5 mm thick Plexiglas to the pendants. The glass can be raised and lowered by means of suspension brackets.

Making your own grinder is easy. The main thing is to properly fix and connect it. Also follow the safety rules when working, use safety glasses and special clothing.

Almost everyone House master has among the tools a homemade emery from an electric motor. With it, you can sharpen various things needed in everyday life. You can, of course, buy such emery in the store. However, its cost is often very high. Therefore, craftsmen make homemade emery.

To make emery, you will need an asynchronous motor from a Soviet washing machine.

For such a device, it is very important to choose the right motor. Special nozzles are mounted on its shaft, which clamp the emery wheel.

How to choose the right motor for the device

In Soviet times, a lot of models of washing machines were produced. They were equipped powerful engines having a reverse. In addition, such a washing machine had a switch equipped with a starter.

The most difficult thing in arranging homemade emery, when such an electric motor is installed, is the process of attaching an abrasive stone to the axis. The shaft of the electric motor in most cases has no thread, the diameter of the hole in the stone often does not match the diameter of the shaft.

To solve this problem, you need to carve a special part. It must compensate for this disproportion. For the manufacture of homemade emery, it is necessary to plan the future dimensions of such a part. Most often, homemade emery is made using an asynchronous electric motor.

So that the emery has high performance, the engine should develop 3000 revolutions. If this number is much higher, then the grindstone may break. Therefore, in order to prevent the possibility of such a breakdown, an electric motor developing 1500 revolutions is used for the house. For an electric motor with 3000 rpm, it is necessary to use a stone of high strength. It must be fastened with a very high quality and reliable flange. Most often, high speeds are needed for polishing products. On such devices, sharpening occurs very rarely.

When done, you do not need to install a powerful electric motor. Professionals recommend for whetstone stationary machine use 400W motor power. To work in the garage, the power of the electric motor is not more than 200 watts. This is exactly what the washing machine was equipped with. One of his positive qualities is low turnover.

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The main goal of the work

Before making emery, it is necessary to clearly understand the future direction of its operation. Usually homemade emery has the ability to change the direction of rotation of the rotor. The Soviet washing machine was supplied asynchronous motor. This allowed, when connecting certain windings, to change the rotation of the axis. Sometimes the motor has four outputs specifically for changing the rotation of the rotor.

To find out the desired direction of rotation, the tester determines:

working winding;
starting winding.

The resistance index of the working winding in most cases does not exceed 12 ohms, for the starting winding it reaches 30 ohms. The working winding is connected to the mains. One end of the starting winding is connected to the output of the coil, its other end must be touched to the second output of the winding, and after touching it, immediately discard it. Usually, a special relay is used for such an operation.

Thus, the direction of rotation of the emery is determined. If the winding leads are reversed, the motor will start to rotate in the opposite direction. Sometimes they do not put a starting coil. To get started, you just need to spin the grindstone, the grindstone will start working.

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Turning work: features

To be able to fix the stone on the axis of the engine, it is necessary to machine a special flange.

This work is done on a lathe. A drawing is preliminarily made, where it is necessary to indicate:

abrasive diameter, its inner hole;
motor axis diameter.

In addition, a flange for the motor shaft is machined directly on the machine. It is put on the axle, securely fastened with a bolted connection, and a nut with a left-hand thread is installed.

The threading of the nut, the thread of the flange directly depends on which direction the rotation of the motor shaft will be directed. For clockwise rotation, a left-hand thread is cut, for opposite rotation, a right-hand thread is cut.

When the desktop emery is turned on, spontaneous tightening of the nut will begin to occur. This nuance must be taken into account. If the nut begins to unwind, the abrasive stone may simply fly off during operation. This is very dangerous, because possible serious injury.

There are many models of electric emery on the market, but it is so simple that you don’t want to spend even minimal money, especially since it is easy to make it yourself. You only have to buy abrasive wheel, and the “donor” of the engine will be an old washing machine, which is likely to gather dust in the garage and, most likely, will never be needed again. Read on to learn how to make emery from a washing machine engine.

What determines the choice of motor

First of all, it should be explained why, in most cases, in the manufacture of a sharpener, an engine from a washing machine is used. The fact is that old models, such as the Volga, Chaika, Ural and many others, had ideal revolutions for emery, 1000 - 1500 per minute. It was this frequency that allowed their activator to spin at the optimum speed. At the same time, washing machines differed quite a lot in maximum load, and hence in engine power. In most cases, it ranged from 200 to 400 watts. This is quite enough so that even axes can be sharpened with emery.

However, before proceeding with the manufacture, it is necessary to study the "nameplate" on the engine housing. This is such a tin plate on which the main parameters of the motor are indicated. It is important that the shaft speed does not exceed 3000 rpm. This is due to the fact that the grinding wheel is not designed for high angular speed and, if the maximum value is exceeded, it can collapse. This is very dangerous, especially when you consider that most homemade emery lacks protection. Moreover, a high rotation speed will lead to overheating of the tool being sharpened, and hence to a loss of cutting qualities.

In addition to optimal frequency and power, the washing machine engine has a number of significant advantages:

Connection to electrical network without additional modification.
Existing mounts make it easy to install the engine on the base of the emery.
The length of the motor shaft allows you to place a grindstone on it, though with the help of an adapter.

Now that the choice of engine for emery is justified, you can proceed to the process of manufacturing it.

This is the only detail that cannot be done by hand. Required lathe and, accordingly, a person who knows how to work on it. What is an adapter for? The fact is that the size of the motor shaft is about 14mm, while the mounting hole

The emery circle usually has a diameter of 32 mm. This means that their "direct" connection is absolutely excluded. The adapter, as it were, increases the motor shaft of the washing machine to the required size.

For manufacturing, you need a piece of steel "round timber", approximately 65 mm long. and 60 mm in diameter. The last figure is due to the need for the so-called flange - a fixed washer on the body of the part, against which the emery circle rests on one side. Its thickness must be at least 4 mm. Turned in front of the flange seat, diameter 32mm. Next comes the “M20” thread, on which the nut will be screwed, fixing the circle.

For mounting on the engine, a hole is made in the adapter body, with a diameter equal to that of the shaft. Further, it all depends on how the pulley was fixed on the washing machine. There were two main options:

By means of a thread on the motor shaft and a large nut.
Bolt 4, screwed into the adapter body, perpendicular to the longitudinal axis of the motor.

The manufactured part must have one of the above methods of fastening, depending on the type of engine.

Sometimes, home craftsmen try to minimize costs and make an adapter with a flange on their own. Most often, a pipe with suitable inner and outer diameters is used as the basis. Without proper experience, this is not worth it. The fact is that it is very difficult to find a suitable workpiece, so “beats” and distortions are inevitable. It will be unsafe to work with such emery. You should not save on health, especially since the cost of the work of the master will not exceed 500 rubles, and if the part is made from its own material, it will cost even less.

Another adapter scheme for making emery from a washing machine engine

The frame on which the engine will be mounted does not require special material costs, but this is no less significant. The foundation should be well thought out, since making emery is not an end in itself, you still have to work on it. At the same time, all attention should be focused on sharpening the tool, and not on holding the motor by hand, jumping around the workbench. It is at least inconvenient to work this way, and in this case, we are not talking about compliance with safety regulations at all.

Therefore, the base of the emery should be heavy enough, and most importantly, allow you to fix the engine in the same way as it was fixed on the washing machine. It is best, of course, to make the frame metal. True, for this you will have to use welding. If this is not possible, then you should take a suitable piece of chipboard, and bolt metal corners on it to mount the engine. Even better, remove the engine from the washing machine along with the standard bracket and screw it to the base. The main thing is to use bolts with nuts for this, self-tapping screws can loosen and unscrew from vibration.

There is one more key moment. The height of the motor mount should not only allow the emery wheel to rotate freely, but also provide a gap of 4–5 cm between it and the base. After the motor is securely fixed to the frame, you need to think about the support table. It must be metal, welding can be replaced with a bolted connection. If on the washing machine the starting capacitor was taken out of the motor housing, on the basis of the emery, a place must be provided for it.

After the motor is securely fixed to the frame and all auxiliary elements, you can go to electrical connections. But first you need to make sure that the grinding wheel is securely fixed to the motor shaft, as well as that there are no various beats.

Motor connection

First of all, it is necessary to recall the safety rules. AC voltage 220 volts is life-threatening. Therefore, before connecting the wires and motor leads, you must make sure that they are disconnected from the mains.

An electric motor from a Soviet washing machine cannot simply be plugged into a power outlet. Rather, it is possible, but first its windings must be connected in an appropriate way. The engine from the washing machine is easier to connect, as it is asynchronous. It is enough to connect the rotor and stator windings in series. In the Soviet washing machine, the motor had a synchronous circuit. Two of its windings, starting and working, are brought out through the body with four wires.

In the manufacture of emery, the simplest and most correct thing is to transfer the entire wiring diagram of the washing machine to the frame, with the exception, of course, of the timer. If this is not possible, then you will have to remember the school physics course and connect the windings yourself. The hardest part is identifying them correctly. The fact is that the wires usually do not have any markings. I'll have to take a multimeter and measure the resistance. A value of the order of 30 ohms will correspond to the starting winding, and 20 ohms to the working winding. Now it is enough to “twist” them in parallel and connect them to the mains connection cord, but there is one important nuance.

The starting winding should be energized only while the emery motor is spinning up. After the motor picks up the required speed, it must be turned off. Otherwise, it will get very hot and quickly fail. Therefore, a button with normally open contacts is included in the break in the primary winding circuit, for example, from a doorbell. The emery switch and the start button are mounted on a plate of insulating material, in an easily accessible location. All connections are carefully insulated. The emery is ready, you can connect it to the network. After starting, the engine should work without extraneous sounds, vibrations and strong heating.

In addition, from a used washing machine, you can also construct: