After I got a drilling machine in my garage, the need arose to sharpen drills; doing this with a grinder is inconvenient, and the entire civilized world does this with emery. Not long before this I got an engine from washing machine, the machine is so old, it’s round, it looks like a barrel, I can’t say what it’s called.

Parts drawing.

I carefully examined the engine, twisted it by the shaft, and made a test run. Indirectly assessed the power by applying a load on the shaft. Moreover, I have heard more than once that these engines will be used as emery machines, and I have seen them too. I drew drawings, ordered parts for production, and began assembly.

3d model of emery.

To attach the stone to the shaft, I developed a bushing with a standard mounting diameter; it was also machined for me along with a pressure washer. I also needed an M20 nut, but that wasn’t a problem at all. I secured the bushing to the motor shaft using two locking screws.

Hub drawing.

Washer drawing.

I connected the starting winding of the engine through a button, it seemed easier to me 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. The emery has been working properly for six months now.

Appearance of emery.

Appearance of emery.

Rar archive of drawings in compass V9 format

How to make homemade emery

• Flange manufacturing

How to make homemade sandpaper? Emery is an indispensable item in household. It can be used to sharpen knives, drills, scissors, various instruments for cutting, which must be sharpened periodically.

Using sandpaper you can sharpen knives, scissors, drills and cutting tools.

Cost of sharpening tools in construction stores very high. Therefore, you can make 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 machine from available tools around the house. An electric motor is used to assemble the device. The necessary attachments for fixing the emery wheel are mounted on its shaft.

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

Diagram 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 the whetstone on the motor shaft. The fact is that the engine is not always threaded. In addition, the diameter of the stone hole may differ from the diameter of the shaft.

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

Before you start manufacturing the device, you need to decide on its future parameters. To make homemade emery, an electric sharpener usually uses an asynchronous motor.

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

If you do decide to install a motor with a rotation speed of 3000 rpm, then you need to install a high-strength whetstone and a high-quality flange. This type of sandpaper can be successfully used for polishing wood.

The electric motor power should be up to 400 W. 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 regular 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 grind a special flange. To do this, you can order the work of a turner by providing him with drawings of the sharpener, the dimensions of the shaft section and the diameter of the hole of the whetstone.

You also need to grind the following parts:

Drawing for making a flange for emery.

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

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

This is necessary so that during the processing of tools the emery nut can be tightened independently. If the nut becomes loose, the stone may fall. During operation, this is very dangerous for others.

If you were unable to make bushings of the required diameter, then you can use pieces of pipes of the same diameter. In this case, you can fill the gaps between the shaft and the bushings by winding fabric insulating tape.

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

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

You can cut the thread yourself using a tap; to do this, you need to clamp the shaft in a vice. It is important to correctly determine the hole diameter for a given thread.

Scheme of a homemade mini-emery machine.

Before you begin manufacturing the device, you need 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.

A washing machine motor usually has 3-4 leads. Thus, with 4 pins, the direction of rotation can be easily changed.

To do this, you need to use a tester to determine the working and starting windings. Most often, the resistance level of the working winding is 12 Ohms. The starting winding has a value of 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 connected with the first end to the coil terminal, and with the other end it is necessary to quickly touch the second terminal and immediately tear it off from it. A relay is used for this operation.

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

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

You don't have to use a trigger coil. Then, after connecting the device to the network, you will need to turn the sharpening stone in the desired direction, after which the device will start working.

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Device assembly and safety precautions

After assembling the device structure, you need to install the device on the workbench. This can be done using a bracket from a washing machine. It needs to be attached to the workbench using 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 device during operation. To do this, you need to put a special edging on the corner, 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 thickness 2-2.5 mm. To do this, you need to cut a strip of metal and roll it into a half ring.

Under the abrasive stone, you need to install a piece of galvanized sheet metal, which will protect the workbench from sparks while the machine is operating.

Work on sharpening tools on homemade sandpaper must be carried out wearing safety glasses and observing all necessary safety measures.

You can make special devices for the sharpener. You need to prepare plexiglass with a thickness of 5 mm. Attach it with hooks to the motor casing. This glass should tilt 180°.

To make the work easier, you need to make a tool rest. It is necessary to support the tool being processed.

If you follow these instructions, you can make your own electric emery that will successfully process necessary tools and will last a very long time. When operating the device, be sure to follow safety precautions.

How to make emery with your own hands? Do-it-yourself emery (drawings)

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

Making your own emery

You can make your own emery if you have an engine from an old one. household appliances, it can be put into practice. First you need to choose Electrical engine, which would be suitable for the manufacture of the described equipment. Quite often, motors from old washing machines of the “Vyatka”, “Volga” type are used for design. or “Siberia9raquo;. This 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 this work may seem quite simple, it is very difficult to make emery with your own hands. For example, one of the main questions is how a sharpening stone can be mounted on the motor shaft. This is due to the fact that there is not always a thread there. In addition, the diameter of the stone hole may not match the diameter of the shaft. For this reason, you need to prepare a special turned part.

Defining parameters

In order to make emery with your own hands, you need to first determine its parameters. Quite often, asynchronous motors are used to make such an installation at home. For emery, you can use the maximum speed, which is equal to 3000 rpm. If you use a more impressive rotation speed, you may encounter the problem of the grindstone breaking. It is preferable to use a motor at home that has a speed of 1000-1500. If you use an electric motor at 3000 rpm, you need to prepare a fairly strong stone. Among other things, a high-quality flange will be needed. Most often high speed motors are used not 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 sharpening machine, a more acceptable power limit is 100-200 W. 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 between the engine and the stone. A flange is prepared for this. When carrying out this type of work, it is preferable to use the services of a turner. But the rest is a matter of technology and a question of the availability of available materials. It is necessary to prepare a flange, which is mounted on the shaft and also strengthened with a washer. It is necessary to take into account that the threads on the nut and flange must be prepared depending on the direction of rotation of the electric motor shaft.

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

When making emery with your own hands from a washing machine, the bushing must be made using a pipe whose diameter is 32 millimeters. You should put an emery wheel on it. Such a system of bushings will be mounted on the shaft quite firmly.

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

With self-made emery, you can adjust the direction of rotation of the rotor. You will need to find the starting and operating windings using a tester. The resistance level of the winding is quite often 12 Ohms, but the starting winding is close to 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 terminal, while the other must be touched to the second terminal of the winding, and then discarded his.

Features of tool manufacturing

Do-it-yourself electric emery is quite often made at home without using a trigger coil. In this case, after connecting the winding to the network, it is necessary to launch the abrasive stone in a certain direction using your hands, after which the machine will start working on its own.

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 the workbench. This can be done using a bracket that is removed from the washing machine. Fastening can be done using bolts. The motor, on the other hand, rests on an angle that holds it in a horizontal position. Among other things, it has a cutout that completely follows the outline of the motor housing.

In order to reduce the force of vibration, you need to put an edging made of a rubber piece of hose on the corner. Avoid injury from saw and flying debris abrasive wheel When using the 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. This could be a strip of metal that needs to be rolled into a half ring shape. Under work surface With an emery wheel, it will be necessary to attach a galvanized sheet element, which will protect the workbench from the effects of flying sparks generated during work. All actions for your own safety should be performed using special glasses.

Finally

As accessories for equipment, you can use plexiglass, the thickness of which should be 5 millimeters. It is mounted on the engine casing, and it is necessary to use an attachment. The fastenings should be made in such a way that the element can be tilted 180 degrees.

You also need to make a tool rest, which is necessary for a strong and reliable support of the workpiece. All work can be done independently, without the help of a specialist. To do this, you will need to stock up on the appropriate tools and materials. In addition, there is no way to do without the recommendations that were presented in the article.

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DIY emery

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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 making crafts with your own hands. After all, in every home there are knives, scissors and other piercing and cutting instruments that require sharpening from time to time. But the price of sandpaper in most retail outlets will not please you! And so why not think about self-production this incredibly useful tool?

Purpose of emery

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

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

To sharpen drills, you should use a commercial sharpening machine, or you can also sharpen them using homemade sandpaper. A sharpening machine is a necessary and irreplaceable thing in the household. It can be used to sharpen almost any tool and can also be used for sanding wood.

Every tool store sells electric sanders. Quite a large selection of them. You can purchase either a very small sandpaper in order to correct dull cutting tools, or a fairly powerful sharpening machine, with which you can grind off a large layer of metal from any part.

The best purchase would be a double-sided electric sandpaper, with finishing wheels on one side and rough grinding wheels on the other. To prevent injury, these 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 have adjustable work stops for the tools being sharpened and spark-proof shields with protective glass.

Electric sanders with adjustable rotation speed are quite convenient. When removing a large layer, you need to use increased speed, and the “finishing” itself must be used. It is better to make the cutting edge at low speeds. This will, of course, prevent the metal from burning. From time to time, when sharpening a tool, it is necessary to cool it in a bath of water.

DIY emery

Every man may have an engine from a household appliance in his hands, and the question of how to make emery with your own hands from scrap materials immediately begins to loom in your head. For this purpose, all kinds of electric motors are used, on the shaft of which they are installed specially machined lathe nozzles that are designed for clamping an emery wheel.

Motor selection

For this purpose, they usually use motors from old-made washing machines, such as Volga, Riga, Siberia, Vyatka. and so on. The engines on such machines are quite powerful and reversible. Switches with a starter are also used for such washing machines.

Despite the fact that it seems quite simple, it is not at all easy to assemble homemade emery from the engine of a Soviet washing machine. For example, one of the main questions is how to attach a whetstone to the motor shaft. After all, there is not always a thread, 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 that would compensate for this disproportion. To make homemade emery with your own hands, you need to know its future parameters. In most cases, asynchronous electric motors are usually used to make emery at home.

For emery, the maximum speed is considered to be about 3000 rpm. A sharpening stone can simply burst at a very high rotation speed. It is best to use an engine at home with 1000 - 1500 rpm. If a 3000 rpm electric motor is to be used, a fairly strong stone must 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 sharpening machine the acceptable power is 400 W, and for home use An engine with a power of about 100 - 200 W from a Soviet washing machine is enough. Of course, it is low-revving, but this 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 a capacitor.

Flange undercut

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

You will have to grind out the flange itself, which is mounted on the shaft and is also secured with a bolt, and a nut, and a washer with a left-hand thread. You also need to take into account that threads are cut on the nut and flange, depending on the direction of rotation of our electric motor shaft. If the rotation occurs clockwise, then the thread should be left-handed, if suddenly it’s the other way around, the thread should be right-handed. During operation of the table emery machine, the emery nut will spontaneously tighten. If you neglect this factor, the nut will work to unwind, and therefore the stone may fly off. And, of course, this is extremely dangerous.

What should you do if it is not possible to manufacture point bushings of a certain diameter? In this case, pieces of pipes of suitable diameter may be useful, and the gaps between the bushings and the engine shaft can be compensated by winding fabric-type electrical tape between the bushings. In addition, you can put the bushings on top of each 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 internal diameter of the emery wheel. An emery wheel is placed directly on it, so that it can fit tightly without winding.

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

Direction of work

Before you make emery at home, you need to find out the direction of its work. With homemade emery, you can change the direction of rotation of the rotor. If, for example, the motor 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 old household appliances 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 operating windings using a tester. The resistance level of the working winding is usually 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 terminal of the coil, and with the other end you need to briefly touch the second terminal of the winding and then immediately discard it (special relays are usually used for this). If you use a capacitor motor, the connection circuit will be different.

This means that your emery will spin in one direction, and if, for example, you swap the leads of the starting winding, then the motor will correspondingly rotate in the opposite direction. You can, in principle, do without a starting coil; in this case, after connecting the working winding to the network, you need to turn the abrasive stone in a certain direction, and then the machine will work.

Installation of emery

After you have made your homemade emery, you need to figure out how to properly install it on your 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 follows the shape of the engine housing. To reduce vibration, a edging made from a rubber piece of hose is put on the corner.

To avoid injury from the saw and flying debris from the abrasive wheel when working on sharpening machine made with your own hands, you need to make a casing. It is best to make it from thicker metal - 2 - 2.5 millimeters. This can be a strip of metal rolled into a half ring.

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

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

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

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

Making your own emery

You can make emery with your own hands; if you have an engine from an old household appliance, you can use it. First you need to choose which one would be suitable for the manufacture of the described equipment. Quite often, motors from old washing machines of the “Vyatka”, “Volga” or “Siberia” type are used for design. This 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 this work may seem quite simple, it is very difficult to make emery with your own hands. For example, one of the main questions is how it can be mounted on the motor shaft. This is due to the fact that there is not always a thread there. In addition, the diameter of the stone hole may not match the diameter of the shaft. For this reason, you need to prepare a special turned part.

Defining parameters

In order to make emery with your own hands, you need to first determine its parameters. Quite often, asynchronous motors are used to make such an installation at home. For emery, you can use the maximum speed, which is equal to 3000 rpm. If you use a more impressive rotation speed, you may encounter the problem of the grindstone breaking. It is preferable to use a motor at home that has a speed of 1000-1500. If you use an electric motor at 3000 rpm, you need to prepare a fairly strong stone. Among other things, a high-quality flange will be needed. Most often, high engine speeds are used not 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 homemade, a more acceptable power limit is 100-200 W. 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 between the engine and the stone. A flange is prepared for this. When carrying out this type of work, it is preferable to use the services of a turner. But the rest is a matter of technology and a question of the availability of available materials. It is necessary to prepare a flange, which is mounted on the shaft and also strengthened with a washer. It is necessary to take into account that the threads on the nut and flange must be prepared depending on the direction of rotation of the electric motor shaft.

If, when making emery with your own hands, the drawings of which will have to be reviewed before starting work, you will use a system in which the rotation occurs clockwise, then a left-handed thread must be prepared and vice versa. If this factor is not taken into account, then the nut will work to unscrew. This will certainly lead to the stone falling off. If there is no suitable equipment for making bushings of a certain diameter, you can use pieces of pipes, and the resulting gap between the shaft and the motor bushings must be compensated by tightening it with electrical tape. You should choose one that has a fabric base. It is necessary to put the bushings one on top of the other. At the same time, when winding the electrical tape, you need to maintain uniformity.

When making emery with your own hands from a washing machine, the bushing must be made using a pipe whose diameter is 32 millimeters. It should be put on. Such a system of bushings will be mounted on the shaft quite firmly.

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

With self-made emery, you can adjust the direction of rotation of the rotor. You will need to find the starting and operating windings using a tester. The resistance level of the winding is quite often 12 Ohms, but the starting winding is close to 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 terminal, while the other must be touched to the second terminal of the winding, and then discarded his.

Features of tool manufacturing

It is quite often made with your own hands at home without using a trigger coil. In this case, after connecting the winding to the network, it is necessary to launch the abrasive stone in a certain direction using your hands, after which the machine will start working on its own.

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 the workbench. This can be done using a bracket that is removed from the washing machine. Fastening can be done using bolts. The motor, on the other hand, rests on an angle that holds it in a horizontal position. Among other things, it has a cutout that completely follows the outline of the motor housing.

In order to reduce the force of vibration, you need to put an edging made of a rubber piece of hose on the corner. You can avoid injury from a working saw and flying debris from the abrasive wheel when using the machine by making a casing. It is preferable to make it from steel. For this you need to choose a canvas whose thickness is 2.5 millimeters. This could be a strip of metal that needs to be rolled into a half ring shape. Under the working surface of the emery wheel, it will be necessary to mount a galvanized sheet element, which will protect the workbench from the effects of flying sparks formed during work. All actions for your own safety should be performed using special glasses.

Finally

You can use plexiglass, the thickness of which should be 5 millimeters. It is mounted on the engine casing, and it is necessary to use an attachment. The fastenings should be made in such a way that the element can be tilted 180 degrees.

You also need to make a tool rest, which is necessary for a strong and reliable support of the workpiece. All work can be done independently, without the help of a specialist. To do this, you will need to stock up on the appropriate tools and materials. In addition, there is no way to do without the recommendations that were presented in the article.

If you decide not to buy sharpening machine, but to make it yourself using your own engine, you will need the services of a turner. Making rather than buying is often justified for several reasons: it turns out cheaper, it turns out to be of much higher quality, it’s no secret that sharpening machines sold in stores sometimes hit the stone mercilessly. Eliminating the runout of a factory sharpener is no easier than making a good machine.

We manufacture two types of machines:

• The stone is installed through a nozzle on the engine. Advantage - simplicity, disadvantage - you can install only one stone. You can install two stones, but at the cost of removing the engine cooling system. The impeller has to be removed.
• The axle with two stones at the ends and a pulley in the middle is driven by a separate motor. With this option, the beating of stones is minimal, the engine is perfectly cooled and does not become clogged with abrasive particles. This system works many times longer. This scheme is suitable for working with grinding and cutting diamond tools both with and without water supply.

We can manufacture a sharpening or cutting machine, complete with everything necessary. We can also use your components: motor, bearings, metal blanks, belts, etc. We can manufacture a machine according to your drawings and wishes, which will be very significantly cheaper, but no worse in quality.

If you need to make attachments for hand-held power tools: drills, dremels, sanders, we will help you. The precision of our machines is quite enough so that the nozzle does not vibrate even at a speed of 20,000 revolutions.

Almost everyone House master Among the tools he has a homemade emery machine made from an electric motor. With its help, you can sharpen various things you need in everyday life. You can, of course, buy such sandpaper in a store. However, its cost is often very high. That's why 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 electric motor. Special attachments are attached to its shaft, which clamp the emery wheel.

How to choose the right electric motor for your device

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

The most difficult thing when assembling a homemade emery when installing such an electric motor is the process of attaching an abrasive stone to the axis. The electric motor shaft in most cases does not have a thread; the diameter of the stone hole often does not correspond to the diameter of the shaft.

To solve this problem it is necessary to grind a special part. It must compensate for this disproportion. To make homemade emery, you need 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 rpm. If this number is much higher, the grindstone may break. Therefore, to prevent the possibility of such a breakdown, an electric motor that develops 1500 revolutions is used for the home. For an electric motor with 3000 rpm, it is necessary to use a high-strength stone. It must be attached 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, there is no need to install a powerful electric motor. Professionals recommend for sharpening stationary machine use 400 W motor power. To work in a garage, an electric motor power of no more than 200 W is sufficient. 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 carried out

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

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

• working winding;
• starting winding.

In most cases, the resistance of the working winding does not exceed 12 Ohms; for the starting winding it reaches 30 Ohms. The working winding is connected to the electrical network. One end of the starting winding is connected to the output of the coil, with its other end it is necessary to touch the second output of the winding, and having touched it, immediately discard it. Typically, a special relay is used for this operation.

This determines the direction of rotation of the emery. If the winding terminals are swapped, the motor will begin to rotate in the other direction. Sometimes they don’t install a trigger coil. To start working, you just need to spin the whetstone, the sharpener will start working.

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Turning work: features

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

This work is performed on a lathe. A drawing is pre-made, which must indicate:

• diameter of the abrasive, its internal hole;
• diameter of the electric motor axis.

In addition, the flange for the motor shaft is turned 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 cutting of nut threads and flange threads directly depends on the direction in which the rotation of the electric motor shaft will be directed. For clockwise rotation, a left-hand thread is cut, for counter-clockwise rotation, a right-hand thread is cut.

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

The online store site offers to purchase accessories for sharpening machines. These products are used to facilitate sharpening of cutting tools. They are attached to the support of the sharpening tool (sharpener) and, using a special mechanism, allow you to press firmly under the right angle edge of the blade, which ensures maximum processing precision.

Sharpening accessories

We offer Consumables and accessories for sharpening machines from the Swiss manufacturer JET. These products, in addition to high-quality workmanship, have a simple and effective design, thanks to which they last for a long time. With JET accessories you can easily sharpen knives, axes, scissors, chisels and other cutting tools whose blades cannot be properly processed in any other way. It is enough to correctly install the object, turn on the sharpening stone, and in just a couple of movements the edge will take on the desired shape.

Accessories for servicing sharpening machines

In addition to accessories in the catalog you will find accessories for sharpening machines. These products help to properly maintain grinding machines, which significantly increases their service life. We offer bars for cleaning and straightening grinding wheel, polishing pastes for leather wheels and cases that make it easier to work with this tool, as well as its movement and storage.

In the online store site you can buy necessary elements for sharpening stones affordable prices by placing an order online through the “Basket”. If you have any difficulties, our consultants will help you make your choice.