Quite often, home craftsmen feel the need to use emery. It may be needed when dull knives or scissors, as well as other cutting tools that require sharpening from time to time. Many experts 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.
You can make emery with your own hands, if you have the engine from old household appliances, you can use it in business. First you need to choose an electric motor that would be suitable for the manufacture of the described equipment. Quite often, engines from old washing machines such as Vyatka, Volga or Siberia are used for design. A similar technique has a fairly powerful motor.
Among other things, a switch that has a starter can be borrowed from the washing machine. Despite the fact that carrying out these works may seem rather simple, making emery with your own hands is very difficult. For example, one of the main issues is how to grind a whetstone onto a motor shaft . This is due to the fact that there is not always a thread there. In addition, the diameter of the hole of the stone may not coincide with the diameter of the shaft. For this reason, you need to prepare a special turned part.
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 that has revolutions 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 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 a homemade grinder, a more acceptable power is the limit of 100-200 watts. Three-phase and single-phase electric motors can be used.
Before making emery with your own hands, you need to think about how to ensure the connection of the engine with the stone. A flange is prepared for this. When carrying out this kind of work, it is preferable to use the services of a turner. But the rest is 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 is also strengthened by a washer. It must be taken into account that a thread must be prepared on the nut and flange depending on the direction of rotation of the motor shaft.
If 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 left-handed thread should be prepared and vice versa. If this factor is not taken into account, then the nut will work to untwist. This will certainly lead to the fact that the stone can fly off. If there is no suitable equipment for the manufacture of bushings of a certain diameter, pieces of pipe can be used, and the resulting gap between the shaft and the motor bushings must be compensated by twisting from electrical tape. You should choose one that has a fabric base. It is necessary to put bushings on top of one another. At the same time, wrapping the electrical tape, you must observe uniformity.
Making emery with your own hands from the washing machine, the sleeve must be made using a pipe whose diameter is 32 millimeters. An emery wheel should be worn on it . A similar 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.
In the emery made by yourself, you can adjust the direction of rotation of the rotor. It will be necessary to find the starting and working winding with the help of a tester. The resistance level of the winding quite often equals 12 Ohms, but the starting winding is close to 30. The working winding should be connected to a 220 volt network, but the starting winding must be connected at one end to the output of the coil, while the other must be touched to the second output of the winding, and then discard his.
Tool manufacturing features
DIY emery is often made at home without the use of a trigger coil. In this case, after turning on the winding into the network, it is necessary to start the abrasive stone in a certain direction with the help of hands, after which the machine will work on its own.
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 the bracket, which is removed from the washing machine. Fastening can be done with bolts. The motor, on the other hand, rests on an angle that holds it in a horizontal position. Among other things, it has a neckline that completely repeats the outline of the motor housing.
In order to reduce the force of vibration, an edging made of a rubber piece of hose should be put on the corner. To avoid personal injury from a working saw and flying fragments of an abrasive wheel when using the machine, you can use the method of manufacturing a casing. It is preferable to perform it from steel. To do this, choose a canvas whose thickness is 2.5 millimeters. This can be a strip of metal that needs to be folded in the shape of a half ring. 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 that form during operation. All actions for your own safety should be done with the help of special glasses.
As devices for equipment, you can use plexiglass, the thickness of which should be equal to 5 millimeters. It is fixed on the engine cover, while it is necessary to use a hinge. The fastenings should be carried out in such a way that the element can be tilted 180 degrees.
You also need to make a handyman, which is necessary for a strong and reliable stop of the workpiece. All work can be done independently without the help of a wizard. To do this, you will need to stock up on the appropriate tool and material. In addition, one can not do without the recommendations that were presented in the article.