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How to make a grinder out of the engine from a washing machine

do it yourselfEven the most primitive grinder costs money. This thing is necessary, because the scissors and especially the knives should always be in good condition. At the dacha, sharpened tools, such as a pruning shears, a shovel, an ax and others, are required even more often; manual sharpening is not an option at all - only time to kill. You can make a sharpening machine with your own hands, especially if you have an unnecessary old washing machine. How to do it, first things first.

What do we take for the manufacture of the machine

To assemble a home grinding machine, you will mainly need a working motor from the washing machine. You can take a 200 W electric motor from a Soviet washing machine, for example, from Riga-17 SMR-1.5. Although some say that the optimum power is 400 watts, while others say that with a power of more than 300 watts, the grinding wheel can scatter into pieces. For rare use of the grinder, a motor of 1000 rpm is enough.

Nothing more is needed from the washing machine, everything else will have to be carved or cut from improvised material with your own hands. And you need:

  • metal 2-2.5 mm thick for a casing on a sharpener;
  • tube for turning the flange;
  • grindstone;
  • nut for fixing the stone to the pulley;
  • starting device;
  • electric cable with plug;
  • a metal corner or a wooden bar for the manufacture of a bed;

Prepare the flange

The first step is to make a flange or buy a finished one. It should be similar in diameter to the engine bushing, and the grindstone should be well dressed on it. The flange is a transitional part between the engine and the sharpener. If you make it from a piece of pipe with your own hands, then you need to cut a thread at one end of it, about a distance of 2 times the thickness of the circle. For tapping use a tap.

The second end of the tube is pressed onto the motor shaft by heating, and then fixed by welding or bolt, drilling a through hole in the tube and in the shaft. Below is a drawing according to which you can grind a flange at a turner. Do not forget to indicate all diameters according to your engine and grindstone, if you order this work.

flange manufacturing drawing

When cutting the thread and putting the grinding wheel on the shaft, you need to consider in which direction the circle will rotate. The thread should be opposite relative to the rotation of the engine so that the nut holding the circle does not untwist during operation.

We connect the engine and assemble the base

The next stage of work is to connect the engine from the washing machine to an electric wire with a do-it-yourself plug. For this, it is necessary to find the starting and working windings from the motor from a Soviet machine. To do this, use a multimeter and measure the resistance. The working resistance is 12 Ohms, and the starting winding is 30 Ohms. The leads of the working winding are connected to the electric cable. With this connection, the grinding wheel will need to set the rotation by hand. Therefore, many make a start button for this.

As a starting device, you can use the ringer button, but not an ordinary capacitor. Connecting a capacitor will cause the motor winding of the washing machine to burn.

Using the engine from the washing machine, you can do without a start button. The grinder will work immediately after being plugged in. The diagram on the right shows such a connection. The most important thing is to correctly determine the output of the working motor winding.

engine connection diagram

Important! When working with an electrician, you need to be careful, if in doubt of your abilities, consult a specialist.

And the last thing to do is the bed or base on which the machine will be mounted.In addition, it is necessary to have a protective cover over the grinding wheel, because small pieces and dust can fly from the grinding stone. A protective casing is best made of metal with a thickness of 2-2.5 mm, although there are variants of machine tools made by hand and with protection from thick plastic. The bed can also be different, the most reliable - from a metal corner. Some fasten the machine to the wall, someone prefers portable sharpener.

grinder options

This is the plus of the do-it-yourself sharpener, you make it for yourself, so that it is convenient for you to work on it. The photo shows some versions of homemade machines.

A grinder is one of the most common fixtures made by hand from the engine from a washing machine. You can make anything you want out of such a detail if you want, even honey extractor. But you need to be careful not only in the manufacture of such equipment, but also in its use, so as not to harm your health. Good luck

   

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