Contents
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.
What is sandpaper for?
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 a homemade machine from a 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 a sharpening machine with your own hands. 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 the normal operation of the grinder, a power of 100-200 W is enough, 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 a homemade fixture, a belt-driven engine is useful.
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 are white). 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 a 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 a 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.