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If you have an unwanted washing machine that you couldn’t sell, you can put it to good use. From the engine of a washing machine, you can make a homemade grinder. Such a device is called a grinder.
It has advantages over grinders – it allows you to conveniently process the ends of products, as well as small parts. Learn how to assemble a machine with your own hands in our article.
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When the machine is used
The grinder is used for final processing of parts from roughness – before painting or varnishing. Also for leveling defects and flaws on surfaces.
The machine will allow you to quickly and efficiently cope with the work. In addition, tapes of various grain sizes go to it, so the scope is quite wide. Depending on the choice of tape, you will be able to process products from:
- wood;
- become;
- non-ferrous metal.
With the help of a homemade product from the engine from a washing machine, it will be convenient to grind parts of various shapes, which cannot be done with a hand tool. For example, triangular, tubular, flat and round objects.
Preparatory work
You will need to make a movable element with your own hands, along which the tape will move. If you buy it separately to assemble the structure, then it will cost about the same amount as a new machine.
What parts are needed for work:
- corners: one 40 cm long and two 15 and 25 cm each;
- 2 long bolts and a few ordinary ones, nuts, washers, spring;
- hairpin;
- a piece of metal measuring 30×100 mm.
What tools will be needed:
- lathe;
- drill;
- welding machine;
- passages;
- open-end wrenches;
- Bulgarian.
You also need parts that can only be made on the machine or ordered in the workshop. This:
- roller;
- bearing;
- sleeve;
- nut;
- shaft.
How to assemble a grinder from a washing machine motor: instructions
Now take the prepared corners. Using welding, connect the corners, as seen in the photo below. To the bottom, weld two small metal plates with holes for the bolt in parallel.
To regulate the tension of the tape on the machine, a bolt with a spring put on it, installed in the end hole of the design from the corners, will help. Make a hole at the top of the angle for the short bolt. Screw in this place the short part of the corner, which is not completely fixed with a bolt. The short part should move, allowing you to change the tension of the tape.
Then install the roller with the bearing mechanism. Do not overtighten the roller on the corner, it should rotate freely. Fasten one end of the roller with a nut, and weld the other end to the corner with a welding machine.
Install the pin. To do this, make an additional hole in the corner under the roller. After threading the stud, secure it with two nuts on one side. When installing the stud, make sure that it enters the thread.
As you can see in the photo above, there is another element in the design. This is a corner with a piece of chipboard, which is fixed with short bolts. It is for your safety. The belt is tensioned with a pin, so your hands will be close to the fast moving belt. This strap will protect your hands from damage.
How to connect the motor
It remains to connect the electric motor. It is advisable to use an asynchronous engine from an automatic washing machine. Power can be from 200 to 300 watts, and the speed of revolutions is from 1500 to 3000 per minute. Therefore, the performance of the belt will depend on the characteristics of the motor.
Well, if the engine has a long enough shaft. But if this is not the case, then you need to increase it yourself. Here you will need a special wood sleeve made on a machine. The sleeve is put on the motor shaft, after which a tape is put on it.
So that the tape does not move during operation, but is located in the middle, you need to make the central part of the sleeve 2-3 mm larger.
Ribbon Installation
You can buy a special tape or make it from an emery cloth. Its width should be no more than 200 mm. Cut the fabric into strips of the appropriate length. Now the strips need to be connected. Use only special glue. Then proceed like this:
- Laying the pieces joint to joint, apply glue to them.
- Lay a piece of cloth on top and press firmly.
- Then cover with a sheet of paper and secure with a hot iron.
- Trim off excess fabric around the edges.
Since the tape will be strongly affected, the connections must be made with high quality.
When putting the tape on the grinder, make sure that the seam that overlaps does not ride up during operation.
How to adjust the grinder
The tape is adjusted with a pin, which is installed in the design of a home-made machine. By twisting and unscrewing the pin, you affect the degree of pressure (tension) of the tape.
Here you need to be careful: if you work at high speed with little tension, the processing may be of poor quality, with missing sections. If you slow down and tighten the tape more, you can ruin the product.
Also choose the degree of abrasive grit in accordance with the processing material.
Having understood the details of the work, you will acquire useful equipment for home use.