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Manufacture of a homemade hand mill with an electric motor. Homemade mill with your own hands

Manufacture of a homemade hand mill with an electric motor. Homemade mill with your own hands
Fig. 1. Redesigned electric motor rotor:
1 holes; 2 grooves; I the place of exit of the finished product.

I can share my experience of making a home mill (true, the idea of the mill was submitted by a friend, and I modified it to a sample).

Making a home mill with an electric motor

I found a faulty electric motor for the mill (with a capacity of about 300...1000 watts). The engine was disassembled first. The starter was left unchanged. But with the rotor (Fig. 1) I performed the following operations:

drilled holes in it along an inclined line with a drill with a diameter of 10 mm to a depth of 7 mm (the distance between the holes is 1... 1.5 cm);

connected the holes with grooves 7 mm wide and 3.5 mm deep using a cutting wheel.

It should be noted that at the exit points of the finished product, that is, at points I, the grooves are formed especially carefully, limited to a depth of 1.5...2 mm. After all, by setting the depth of the grooves at the outlet by the selection method, it is possible to regulate the quality of grinding;

chamfer is removed from the upper part of the rotor (with sandpaper);

insert the rotor into the stator and drill holes in the stator covers or cut holes with a chisel for filling grain and the output of finished products.

Hopper (tin) for filling the crushed product
Fig. 2. Hopper (tin) for filling the crushed product.

For the convenience of filling the mill with the crushed product, a loading hopper made of tin is attached to the lid. The dimensions of the hopper depend, of course, on the size of the engine (Fig. 2). On top of the motor shaft (now mills), a handle is attached (using a pin, bolt or (if there is a thread on the shaft) nuts. The handle design can be any.

For ease of use, the mill (assembled) is screwed to a board, which is then installed on a bench or stool, where a hole is cut for the exit of flour (Fig. 3). An inverted bucket is placed under the bench (at work), and a container for flour is placed on it. The products are ground either by moving the handle back and forth (180), or by first making five turns of the handle clockwise, and then two or three turns counterclockwise (otherwise the grooves become clogged).

The advantage of this mill is that it is made of easily accessible waste materials. The disadvantage is low productivity. So, if you use a 300 W motor for the mill, the flour output will be only 700 g/h. And having made a mill from an engine (I repeat, a faulty one) with a power of 1 kW, the mill's productivity will increase to 2.5 kg/h. It is clear that the greater the engine power, the larger the dimensions of both it and the rotor, which means that the faster the grinding goes. By the way, to increase productivity, instead of a handle, you can try connecting to the shaft mills electric drill and turn it on at low speed.

Mill assembly
Fig. 3. Mill assembly:
1 a hopper; 2 an engine cover; 3 a stator; 4 a bench with a hole; 5 a container for flour; 6 an inverted bucket (the board to which the mill is usually attached is not shown for simplicity).

Tips for a novice miller:

clean the rotor once a week;

fill the grain in small portions to avoid clogging.

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