We make a mill for grinding grain with our own hands. Homemade grain mill: simple assembly diagram Do-it-yourself household electric grain mill

Despite the fact that the era of agriculture ended many years ago, many are still interested in the question of how to make a mill for a summer residence with your own hands without much effort. Today we will cover this topic in as much detail as possible.

First of all, it’s worth talking about why a windmill is needed in a dacha today? After all, most likely no one will decide to use it to grind prepared millet into flour on a daily basis.

In addition, today, growing millet is more of an activity for professional farmers, because they are mainly responsible for production exclusively with modern technology.

However, a do-it-yourself decorative mill, which will be installed in the future at the dacha, has not bothered anyone yet.

What is a windmill used for today?

Before you decide to choose a place where your self-made windmill will be installed in the future, you should definitely keep in mind that the structure may have different purposes.

Firstly, a DIY windmill made for your dacha can hide some of the least attractive places in your home, like a manhole.

Secondly, most mills, which can be made without any problems with your own efforts, are quite simply made from lightweight materials, which makes it possible to significantly reduce their size.

For this reason, this type of structure is in most cases used as protective caps necessary for various types of engineering facilities.

Thirdly, many owners of country houses decide to turn the drawings of a mill in real life into a playhouse for their children. True, this requires a slightly enlarged design, but nothing is definitely possible.

The main thing you should pay attention to is that it is as stable as possible and with an open entrance.

Of course, if you decide to make a mill for the garden, you can subsequently find a huge number of different uses for it, as a component of modern landscape design.

Selecting and preparing a site for a new mill

The construction of a windmill is a rather important moment. It is important to pay attention to a number of fairly important factors in order to achieve a truly beautiful design.

Ideally, this should be an open space, since the blades will rotate actively and non-stop, and besides, it is much easier to assemble a massive structure in an open area, because absolutely nothing will interfere.

After completing the issue of choosing a location, it is necessary to remove all stumps and bushes that may interfere. By the way, if the grass is tall enough, it is advisable to even cut it. The ground must be thoroughly leveled before installation of the structure.

Create a plan

The easiest way to understand from a photo of a mill at the dacha is how exactly the structure should be built.

The following actions must be taken:

• Draw a sketch of the future layout;
• Using the drawing, calculate what size each of the parts for the future mill will be;
• Choose the optimal material for yourself, which will subsequently be used to create all structural elements.

It is believed that pine is one of the most profitable materials from a financial point of view, since everyone can afford it, and at the same time it is endowed with fairly good performance qualities.

Note!

After completing all the issues with the drawing and, accordingly, the plan, you can then proceed to the process of direct assembly. To make the mill look really beautiful, you can decorate it. This will give the object a finished look.

It is important to pay attention to the fact that if the wooden elements have not been processed well enough, it is advisable to use paint for decoration.

Of course, anyone can make a mill on their own. The most important thing is to think through the first stage in detail and draw the correct markings, as well as subsequently select the ideal place in your opinion.

In addition, you need to decide in advance what qualities you want to endow your building with.

DIY mill photo

Note!

Making a home hand mill with an electric motor. Homemade do-it-yourself mill

Making a home mill with an electric motor

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

I 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);

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

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

The top of the rotor is chamfered (with emery);

The rotor is inserted into the stator and holes are drilled or chised in the stator covers to fill the grain and output the finished product.

For the convenience of filling the grinding product into the mill, 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). A handle is attached to the top of the motor shaft (now mills) (using a pin, a bolt, or (if there is a thread on the shaft) nuts. The design of the handle can be of any kind.

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

The advantage of this mill is that it is made from readily available waste materials. Disadvantage: low productivity.

So, if you use a 300 W motor for the mill, the flour output will be only 700 g/h. And by making a mill from an engine (I repeat, a faulty one) with a power of 1 kW, the productivity of the mill will increase to 2.5 kg/h. It is clear that the greater the engine power, the larger the size of both it and the rotor, which means the faster the grinding goes. By the way, to increase productivity, instead of a handle, you can try connecting an electric drill to the mill shaft and turning it on at low speed.

Tips for a novice miller:

Clean the rotor once a week;

Add grain in small portions to avoid clogging.

all materials from the “Ideas for the Master” section

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Grinding various grains and preparing feed for livestock and poultry on a private farm, producing corn, oat, wheat and other coarse or fine flour for home baking - all this is possible with the Malyutka micromill, created in Udmurtia by O. Zaitsev and A. Yagovkin. The small dimensions of the “Malyutka” are not a hindrance to the unprecedentedly high productivity of the unit - a bucket of corn turns into high-quality flour in just 5 - 6 minutes, and wheat, oats and similar grain crops - twice as fast.

As for reliability, it is convincingly evidenced by the fact that in two years of operation of the mechanism at full load, not a single malfunction arose.

The design of the micromill is extremely simple, so any DIYer familiar with drilling and turning can make it. And if it is possible to order three main parts (rotor, stator and bearing cover) “outside”, then you can literally assemble the mill “on your knees”, in a home workshop.

For those who decide to do everything themselves, some technological recommendations. The first concerns the manufacture of the steel rotor. It is machined integrally with a shaft of variable cross-section (from round steel or forging grade “45” with a diameter of about 120 mm and a length of 90 mm) in three stages. After pre-processing, holes with a diameter of 10 mm are drilled into the workpiece, evenly spaced around a circle with a diameter of 105 mm. After removing the top layer (grooving to a diameter of 104.5 mm), the working protrusions-teeth open.

The finished rotor must be subjected to heat treatment - hardening and tempering. The technology of this process is as follows. The part is heated to a temperature of 800 - 820 ° C (light red heat color), after which it is lowered into an oil bath (when quenched in water, the part can become overly brittle, and some types of steel are prone to cracking). After hardening, tempering is carried out, for which the rotor is heated to 380 - 400 ° C and then cooled in air. As a result, the surface hardness increases (up to 350 - 400 Brinell units). The quality of hardening can be checked with a regular file - it should slide along the cutting edge of the tooth without leaving a mark.

The stator is perhaps the most complex part of a micromill. As in the manufacture of a rotor, one cannot do without turning and drilling work, and the process of obtaining the part itself is also carried out in three stages. First, the workpiece is pre-processed on a lathe.

In this case, a technological allowance is left on the side of the working chamber, for which the central hole is drilled to a diameter of 70 mm. After this, a circle with a diameter of 105 mm is marked on the workpiece and, in accordance with the drawing, the centers of future holes are marked on it, which subsequently form the working surface of the stator. Then the contours of the upper and lower “windows” are marked. Next, blind holes are drilled to a depth of 28 mm exactly in accordance with the drawing and markings.

After this, the technological allowance is removed on a lathe and the cavity for the working chamber is bored to a diameter of 105 mm. Then, having unfolded the workpiece, bore the seat for bearings No. 203, and also make a groove for the sealing collar, if provided. Practice shows that, in extreme cases, you can do without this design “excess”.

Having finished with the turning work, it is necessary to drill threaded holes for installing the stator cover, nozzle, loading hopper and bearing cover. And finally, the stator must also be subjected to heat treatment using the technology described above for the rotor.

The base plate (frame) for mounting the micromill is cut from a steel sheet 6 - 8 mm thick. The stator is attached to it with M6 screws, which simultaneously fix the pipe. The latter, by the way, can be made removable and easily installed in the hole in the frame, which in this case is done locally - according to the actual dimensions of the pipe, which will be held in the hole by friction alone. In principle, the cross-section of the pipe may not be square, but round, and it can be made from a piece of thin-walled pipe with an outer diameter of 28 mm. At the same time, the hole for it in the slab should be round, in accordance with the actual diameter of the pipe.

The loading hopper is cut and bent from roofing iron, followed by soldering of the joint seam. This design is quite simple to manufacture, and serves no worse than one welded from a thick sheet. The hopper is installed on the stator using two M6 bolts.

A characteristic feature of the Malyutka micromill is that when the rotor rotates in one direction, only half of the stator working chamber is involved in the process of grinding raw materials and obtaining the finished product. If you rotate the rotor in the opposite direction, then the second half of the stator will participate in the work. The result in the first and second cases is different, since the sizes and number of protrusions in the working chamber on the right and left are not the same. This is what makes it possible to achieve a greater or lesser degree of grinding at the output, changing only the direction of rotation of the rotor.

The micromill rotor rotates on two radial ball bearings, which significantly increases the load-bearing capacity of the unit and the reliability of the entire mill as a whole.

And one more detail: a spacer ring - 0.5 mm thick, installed on the shaft between the bearings and allowing them to move by the calculated amount; in this case, a certain interference appears, adapting the unit to the internal stresses that exist in the rotor-stator mechanisms.

The electrical equipment of the micromill - a capacitor, a toggle switch and a fuse - is mounted on a dielectric plate next to the electric motor. The rotor is reversed by simply switching the capacitor, which, due to the relatively small load on the motor, has a capacitance of about 3.8 μF.

The shafts of the engine and the grain crushing mechanism are located coaxially. The transmission of rotation is carried out by a connecting rigid coupling. To adjust the alignment, there are guide holes for M6 bolts located in the mounting angles. Moreover, for movement in the horizontal plane, holes adjacent to the base plate of the mill are used, and in the vertical plane, holes located on the other shelf of the corners are used.

Before testing the mill, it is necessary to carefully adjust the position of the stator using bolts: the rotor should rotate in it easily, without jamming. After this, the micromill can be mounted on a chair or stool, plugged into the network and filled with grain. Flour will pour out of the outlet pipe into a container placed below.

Rice. 1. Micromill “Malyutka”:

1 - electric motor (from the washing machine); 2 — engine mount (M6 bolt with spring washer, 12 pcs.); 3 — engine support (steel angle 45×45, 2 pcs.); 4 - plate (steel, sheet s6 - 8); 5 — couplers (studs with M6 nuts); 6 — casing (roofing iron); 7 — coupling (StZ); 8 — rotor (steel 45); 9 — bearing unit cover (StZ); 10 — stator (steel 45); 11 — pipe (roofing iron); 12 — stator cover (steel, sheet s3); 13 — stator cover fastening (M6 screw, 4 pcs.); 14 — spacer ring; 15 — fastening of the loading hopper (M6 bolt, 2 pcs.); 16 — bearing No. 203 (2 pcs.); 17 — fastening the bearing cover (M6 screw, 3 pcs.); 18 — M6 set screws with locknuts; 19 — handle bracket (steel, sheet s2, 2 pcs.); 20 — loading hopper (roofing iron); 21 — handle axis (M6 stud with two nuts); 22 — handle (wood); 23 — fastening of the pipe (M6 bolts).

2. Schematic diagram of the micromill

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Is it possible to make a grain mill with your own hands? How is it used?

The home mill is currently used by connoisseurs of a healthy lifestyle to produce flour from various grains - corn, rye or wheat - at home. There are models that allow you to obtain other products - feed and flakes. By making products yourself, you can be confident in their quality.

Types of household mills

There are 2 types of grain mills: mechanical and electric. The former have a lower cost, the latter can cope with a larger volume of grain, but their price is more expensive.

The mechanical device is convenient in that it can be used away from electrical sources. When choosing, you should ask what diameter the millstones are: the larger they are, the easier it will be to process the grain. It is worth paying attention to the material from which the millstones are made - it could be granite or ceramic. The best material is corundum ceramics, thanks to which you can obtain the finest flour.

You should be aware that a home mill is not suitable for processing oilseeds such as sunflower.

Mill "Malyutka"

If you have the technical capabilities, skills to work with a lathe and the availability of materials and tools, a mini flour mill can be implemented independently. In any case, the necessary parts can be ordered from a turner. First of all, before making a mill, you should find the drawings. One of the simplest and most famous models is called “Baby”. It was invented by engineers from Udmurtia, and it compares favorably with other models not only in its small size and simplicity of design, but also in its wide functionality and excellent performance: in 5 minutes it can handle a whole bucket of grain.

Technical characteristics of a homemade grain mill:

• weight - no more than 15 kg;
• average productivity: oats, wheat and other cereals - 0.5 buckets per minute, corn - 0.2 buckets;
• power consumption - 180 W;
• produces 2 types of products - coarse grinding and fine grinding;
• Dimensions - no more than 330x170x170 mm.

List of materials required to assemble the device:

• electric motor (a motor from a broken washing machine will do);
• M16 bolts for securing the engine;
• angle steel is used to make an engine mount;
• galvanized iron for making a box (the finished flour will go into the box);
• rotor, stator;
• bearings;
• axle and 2 M6 nuts;
• cover for the assembly;
• handle made of wood or other material.

The manufacture of the mill takes place in 3 stages: you need to make a rotor, stator and frame. The first is machined from a steel blank with a thickness of 90 mm and a diameter of 120 mm in accordance with the drawing. One of the most difficult parts to manufacture is the stator. Work should be carried out as carefully and accurately as possible, following the drawings. The rotor and stator in this case will work like millstones. The frame can be made of sheet iron with a thickness of at least 8 mm.

Mill from a washing machine

An interesting flour grinder made from a washing machine. This is a simple and powerful device that works on the principle of a coffee grinder. There are no detailed instructions for making such a mill, since each washing machine has individual parameters. The main thing is to understand the meaning of the device: it is not millstones that are used, but the grain is ground by knives mounted on an axis that rotates at high speed. The device uses 2 electric motors installed oppositely, the knives rotate opposite to each other. The speed of work and the quality of the final product will depend on the sharpness of their sharpening. To make a knife, a steel sheet measuring 200×15 mm with a thickness of 1.5 mm is used. Sharpening is done as the knife rotates; you can experiment with it. After sharpening is completed, a hole is drilled in the place where the knife is attached to the axle. The knife is put on the axle and secured with 2 nuts and washers.

It is necessary to make a container from sheet iron or other material from which the grain will flow into the grinding tank. The container and tank are separated by a manually opened valve.

At the point where the finished flour exits the grain mill, a sieve and a container for collecting flour are installed. To prevent losses when the product comes out, it is recommended to use a sleeve made of rubber or plastic (it can also be made of metal).

To prevent mill failure, it is recommended to clean the millstones every week.

Many housewives believe that high-quality food can only be prepared from natural ingredients. Today, even grinding flour yourself is becoming fashionable. There are household grain mills for this. You can buy the unit or make it yourself.

Operating principle and structure

A grain mill will allow you to obtain a product from raw materials, the quality of which is guaranteed by your own choice. The row machine grinds wheat, oats, corn, barley and other grain crops. The output, at the owner’s request, is flour of any type of grinding, flakes, cereals of different fractions, and mixed feed. The household mill is small in size and easily fits on the kitchen table. At the same time, its productivity allows it to cover the needs of the household. The simplest model with a low-power electric drive processes half a bucket of wheat per minute.

The grain mill operates on the basis of a rotary mechanism. It consists of:

• rotor;
• stator;
• electric motor.

The operating principle of such a mill is simple. The grain enters the mechanism through the receiving cup. Inside it is ground with the help of a rotor and stator. The finished flour or other product is poured through the outlet pipe into the prepared container.

Homemade grain mills come in two types:

1. Mechanical. Grinding is carried out by rotating the handle using your hands or a simple electric drive. They have low productivity. But assembling the mill is very simple and low-cost. You will experience the pleasant process of turning grains into flour. It is similar to grinding coffee beans in a manual coffee grinder.
2. Electrical. Aimed at processing increased volumes of grain. These grinders are a great option for regular use at home. Models with a powerful motor can even grind mushrooms or dried fruits.

Attention! In order for the “filling” of the mill to work reliably, it is placed in a body made of hard wood such as pine, linden or beech. Wood will add pleasant notes to the aroma of flour.

Preparing to assemble a simple mechanism

The proposed model of a household mill is the author's own. It was developed by Udmurt masters. The length of the case does not exceed 32 cm. The height and width are even less. The mass of the assembled crusher is 15 kg. The mill needs a motor with low power, up to 180 W. A motor from an old washing machine or similar household appliance will do. Basic productivity - 1 bucket of corn or 2 buckets of wheat in 10 minutes. The author's assembly diagram for this mill is shown in the photo. In addition to the electric motor, you will need:

• 12 screws and the same number of spring washers for fixation;
• a pair of steel corners measuring 45x45 mm (for motor support);
• steel sheet about 8 mm thick (for the frame);
• and another one, about 3 mm thick, as well as fastenings - 4 bolts;
• studs with nuts;
• a small iron box for the roof (reception cup) and 2 screws for it;
• rotor;
• stator;

• protective cover for bearings;
• coupling;
• metal pipe;
• spacer ring 0.5 mm;
• pair of bearings No. 203 plus 3 bolts;
• steel handle brackets 0.2 cm thick;
• wooden handle.

Attention! In this mill design, bolts of the basic type - M6 - are used everywhere.

Crusher assembly: rotor manufacturing

To manufacture the rotor along with the shaft, stator and cover for the bearing compartment, you will need the ability to use a drilling and lathe. Before working on the mill, it is important to know the subtleties of the process:

1. The shaft is machined from round steel or M45 forging.
2. The basic diameter of the rotor is 105 mm with subsequent turning to 104.5 mm.

The finished part should be hardened:

• heat in oven to 800 °C;
• cool in oil container;
• heat to 400 °C;
• Set aside to cool at room temperature.

Attention! Quenching cannot be carried out using water; it will negatively affect the strength of the mill.

You can check the quality of the procedure with a file. It should not leave marks on the cutting edge of the tooth.

In the proposed scheme, the rotor rotates on a pair of radial bearings. A spacer ring is attached to the shaft between them. This will allow the bearings to move and adjust to the voltage inside the device. The mechanism will become more reliable and last longer.

Stator and other elements

Making the stator yourself is even more difficult. When turning on the machine, leave a minimum allowance in the workpiece:

• make an opening in the center - 70 mm;
• mark the workpiece based on a diameter of 10.5 cm, mark the locations of future openings, contours
• holes at the bottom and top;
• drill blind holes 2.6 cm deep;
• eliminate the allowance on the wall and cut out a space for the rotor (10.5 cm);
• on the reverse side, cut out a seating groove for the bearings;
• think over and prepare a ring for the seal.

Advice. The stator also needs to be hardened.

Working on machines is the most difficult stage of mill assembly. Therefore, you can entrust it to professionals by ordering parts from them. The stator position is manually adjusted using clamp bolts. The quality of grinding depends on accuracy. The electrical circuit of the mill, in addition to the motor, includes a capacitor (3.8 kmF), a fuse and a switch. All contacts should be closed from direct access.

After a successful trial run, all that remains is to make the frame, secure the apparatus, and attach containers to it for receiving and exiting raw materials. The simplest grain mill is ready.

Have you tried making such a mill yourself?

Homemade mill: video

Home mill for business

In this business idea, we will assemble a home mill with our own hands from inexpensive equipment. Our home mill will be modest in performance, but also in price. Despite the low productivity, you can organize a home business using one of the most popular products. The essence of the business idea for a home mini-mill is simple and concise:

1. Wholesale purchase of first class grain.
2. Processing grains into flour.
3. Sales of different types of finished products with a wide range at retail.
4. Sales of bran (secondary product as feed for livestock and poultry).

If we produce single-grade wheat flour (all-purpose), we get 72% (or 60% premium) flour and 28% bran. Having your own mini-mill for producing flour in retail batches has certain advantages. This has a significant impact on customer preference today. After all, buyers increasingly began to pay attention to narrow-profile manufacturers. You will also be able to sell your products at prices that will please the buyer. After all, you do not have to invest in the cost of the product the costs of wholesale purchase and delivery of flour products or cereals, wages of service personnel, etc.

In addition, it is not a problem for a “single” miller to expand the range of processed products or produce small-scale versions of rare flour types to order (coarse grinding, with bran, etc.). Today, many buyers do not find flour for baking special and healthy types of bread in retail grocery chains.

Home-ground varietal flour

Flour is classified into different types, but in the flour milling business it is important to take into account not only its nutritional properties, but also its consumer value. The most important classifier of flour is the grade (highest, first and second)! Flour varieties are distinguished according to different characteristics:

1. For external:
   • color and flowability
   • grinding size
   • ash content
2. According to organoleptic characteristics:
   • color, taste and smell
   • quantitative ratio of various fiber tissues
   • changes in properties during the preparation of flour products
   • the amount of vitamins and protein in the finished product.

Not every mill can produce the highest grades of grinding. It has long been a very popular variety, but is gradually being replaced by other species. The highest grade contains more protein, but less vitamins and fiber. It has a brighter white grind color and excellent presentation. High-grade flour is finely ground endosperm of grain with a minimal presence of ground particles of the grain shell. Well, the shell contains the largest amount of vitamins. For this reason, the properties of high-grade flour are better suited for confectionery or pasta dough.

First grade flour, richer in vitamins, has a slightly darker color and is much better suited for baking bread. Also, first grade flour contains many water-soluble substances, such as carbohydrates, which is more suitable for baking.

There is also a universal grade of flour, which is a mixture of premium and first grade. The universal grade is produced in single-grade mills. Its main feature is considered to be the ability to use it in confectionery or pasta as well as in the baking industry.

Flour is an integral part of most food products, from bread to sauces and soups. There are different types of flour, and they differ not only in their original product (wheat, rice, corn, etc.), but also in the variety, grinding quality and type of product. The demand for flour is high not only on an industrial scale, but also in retail trade. This is where the emphasis should be placed when creating a home mini-mill for small-scale production.

The profitability of a home mill

Now let's calculate the profitability of a home mill. We make calculations for retail sales of the finished product. The concept of a business model can be represented in a simple calculation:

1. Purchase. The cost of 1st class wheat grain is $200/ton.
2. Sales Price 1kg. all-purpose flour – $0.37 and price 1 kg. bran – $0.08.
3. AND THAT: from one ton of grain, we get 720 kg. universal grade and 280 kg. bran. Thus, 720 kg. of universal flour grinding in retail will bring an income of $288. The average price for bran is $0.08-0.1. So, 280 kg. bran will sell for $22-27. In total, we get the total income: (720kg X $0.37) + $22 = $280. And even more: $280 - $200 = $80 – dirty profit from 1 ton of grain.

If we take into account that the production capacity of a home mini-mill workshop (described above) is at least 30 kg/hour, then up to 7 tons can be processed in a month. And this is already about $500 per month. With such income, you can increase the productivity of your home line over time by purchasing additional milling equipment.

Equipment for a home mill shop

To assemble a mini-flour mill at home, we will need special equipment:

How to make a grain mill with your own hands

A household mini grain mill is a necessary device for producing flour. Making a mill with your own hands will require skills in working with drilling and turning devices. Using this device you can obtain coarse or fine flour and use it for home baking. Read the detailed instructions on how to make a mill with your own hands and try to apply your knowledge in practice.

Characteristics of a homemade mini grain mill

This device was created in Udmurtia by O. Zaitsev and A. Yagovkin and was called “Baby”. Using this handmade mill, you can grind grain, make feed for livestock and poultry on your farm, and grind corn flour. oats, wheat and other grains. A homemade mill is small in size, but at the same time has high productivity: in just 5-6 minutes you can grind a bucket of corn on it, and wheat and oats - 2 times faster.

The technical characteristics of a homemade grain mill made by yourself are as follows:

• dimensions (without pipe and hopper) - 320 x 160 x 170 mm
• electric motor power - 180 W
• productivity: for corn - 0.2 buckets per minute, for wheat, oats and other crops - 0.5 buckets per minute
• number of possible grinding grades - 2
• the chopper is homemade, rotor-stator and reversible
• weight of the mill assembled - 15 kg.

This homemade grain crusher mill is quite reliable: as practice has shown, over two years of active operation the mechanism has never failed.

How to make a rotor for a homemade mini mill

The design of a homemade grain mill is quite simple, so anyone who has the desire can assemble such a device on their own. However, before you make a mill with your own hands, you need to acquire certain skills, namely, mastery of drilling and turning devices.

But if you don’t have such skills, you can order the required parts from the workshop. Only three main parts will have to be ordered from the craftsmen: the rotor, stator and bearing cover. You can assemble the entire structure from already manufactured parts in your home workshop.

If it is possible to make all the parts for a homemade flour mill yourself, then you should take into account a number of technological recommendations. When manufacturing a steel rotor, it is necessary to grind it together with a variable-section shaft. It is made from steel round timber or forging (grade 45, diameter 120 mm and length 90 mm). The work should be carried out in three stages. First, preliminary processing is needed; holes with a diameter of 10 mm are drilled in the workpiece, which should be evenly spaced around the circumference (diameter 105 mm). When the top layer is removed (grooved until a diameter of 104.5 mm is reached), the working protrusions-teeth open. Then the finished rotor must be subjected to heat treatment, i.e. hardening and tempering.

The technology of this process is as follows: the part must be heated to a temperature of 800-820 ° C (to a light red heat), then lowered into an oil bath (it is not recommended to use water, otherwise the part will turn out to be too brittle and cracks will form), then tempering should be carried out , for which you need to heat the rotor to 380-400 ° C and then cool it in air. As a result, the hardness of the treated surface increases significantly - up to 350-400 Brinell units. You can check the quality of the hardening of the product using a file, running it along the cutting edge of the rotor tooth. With high quality hardening, the file will easily slide over the product without leaving a mark.

The rotor of this design rotates on two radial ball bearings. This allows you to significantly increase the load-bearing capacity of the unit, as well as the reliability of the entire mill as a whole.

A spacer ring 0.5 mm thick should be installed on the shaft between the bearings. This device allows the bearings to move by the calculated amount, creating a slight interference, which allows the unit to adapt to the internal stresses present in the rotor-stator mechanisms.

How to make a home mill stator with your own hands

The most difficult part is the manufacture of the stator, so maximum precision and accuracy of the work performed is required here. The entire process of manufacturing a part also takes place in three stages. First you need to process the workpiece on a lathe. In this case, a technological allowance should be left on the side of the working chamber. To do this, you need to drill the central hole to a diameter of 70 mm, then mark a circle with a diameter of 105 mm on the workpiece, mark the centers of future holes, which will subsequently form the working surface of the stator. These markings are applied in accordance with the drawing. Next, the contours of the upper and lower “windows” are marked, and after that, in accordance with the drawing and markings, blind holes are drilled to a depth of 28 mm.

Next, you should remove the technological allowance on a lathe and bore the cavity for the working chamber to a diameter of 105 mm. Now the workpiece needs to be unrolled and the seat for bearings No. 203 must be bored. A groove for the sealing collar (if provided) is also machined. However, it is known from practice that the design can do without this element.

This completes the first stage of processing the part. Now you can start drilling the threaded holes to install the stator cover, pipe, hopper and bearing cover. At the end of the work, the stator must be subjected to heat treatment, like the rotor (using the same technology).

In the process of making a homemade mill, it is very important to carefully adjust the position of the stator during the process of assembling the mini-mill. This is done using bolts. The rotor should rotate easily and without jamming. After this, you can test run the mill. First you need to fix it on a stool, plug it in, fill the hopper with grain and turn it on.

How to make a home mill frame

Next point: how to make the third important design detail for a homemade mill - the base plate, or frame. It can be cut from a steel sheet 6-8 mm thick. Then you need to attach the stator to it using M6 screws, which will simultaneously fix the pipe. The last element can also be made removable by simply installing it in the hole in the frame, which in this case is made according to the size of the pipe. The structural element will be held in this hole only due to friction.

The pipe is made from a piece of thin-walled pipe with an outer diameter of 28 mm. Its cross-section can be square or round, and in accordance with this, the hole in the frame for it is also made square or round, depending on the diameter of the pipe used.

Next comes the loading hopper. This is the simplest part in the overall design according to the manufacturing method. The bunker can be cut out of roofing iron, then the sheet can be bent to a given shape and the butt seam soldered. Roofing iron can easily compete in strength and reliability, in this case, with thicker sheet iron. The finished hopper is installed on the stator and secured with two M6 bolts.

Before making a grain mill, be sure to consider one important factor. If the rotor rotates in one direction, only one half of the stator working chamber is engaged. If the rotor rotates in the opposite direction, then the other half of the stator will begin to participate in the work. Since the sizes and number of protrusions in the working chamber on the right and left are different, the result of grinding the product in the first and second cases will be different. Thanks to this, using one or another option, it will be possible to obtain a greater or lesser degree of grinding of the output product. To do this, you just need to change the direction of rotation of the rotor.

Electrical equipment for a household mini-mill

Even before making a mini mill, take care of the electrical equipment. A capacitor, a toggle switch and a fuse are used as electrical equipment in the mini-mill design. They are mounted next to the electric motor on a plate made of dielectric. To reverse the rotor, you simply need to switch the capacitor, the capacitance of which is approximately 3.8 μF (due to the relatively small load on the motor).

The shafts of the grain crushing mechanism and the engine must be positioned coaxially. The transmission of rotation will be carried out using a rigid coupling. It is necessary to make guide holes in the mounting angles for M6 bolts so that the alignment of the shafts can be adjusted. In the base plate of the mill, there should be holes in the horizontal plane that will be used for movement, and in the vertical plane, the same holes should be located on the other shelf of the corners.

To prepare the flour, you only need to place a container under the outlet pipe. If everything is done correctly, the mill will work without interruption.

Equipment for flour production

Today, many people are trying to come up with various business ideas in order to bring them to life to gain additional financial opportunities. If you also don’t know what to do with yourself and live in your own private home, then producing and selling flour could be an excellent and very profitable idea for you.

What do you need to know if you decide to produce flour?

Many people do not know exactly what is needed to produce flour if they decide to sell it. Most people worry that grinding grain will require special equipment, but this is not entirely true. Equipment for flour production in a private home is not as cumbersome as it seems at first glance. You definitely won’t need to purchase a mill complex, but you will still have to buy a regular mini-mill.

How to choose the right equipment for grinding grain?

First of all, before going to the store where you can purchase equipment for flour production, think about how much of this product you are going to produce per hour? In addition, your start-up capital plays an important role in this matter, because without the availability of appropriate funds you are unlikely to succeed.

Of course, you should understand that the less flour your equipment produces per hour, the worse the quality of the product you will get. As a rule, such flour is only suitable for making homemade bread or for those who like to create crafts using salt dough.

How much should I expect?

If you are going to open your own business and produce at least half a ton of flour in one hour, then you will have to shell out a more significant amount of money. Equipment for the production of flour in large quantities, the cost of some additional services and unforeseen situations will require you to have a starting capital of 50 thousand dollars. If you are going to produce only the highest quality flour in large quantities, you will have to double your starting capital.

What else do you need to know if you are going to start making flour?

As a rule, mini-mills for flour production bring the first profit to their owners within one and a half to two years after purchase. But don’t think that to start your own grain grinding business you will only need to purchase a mini-mill. In addition, you will have to get a lot of signatures and collect the necessary documents. In particular, permits from the fire service, from the SES, from the State Food Industry and from executive authorities.

If you are going to build an additional structure where you will produce flour, you will also have to obtain a building permit. You should also immediately think about what packaging you will use to sell the flour you produce. These can be paper or polypropylene bags. You can also use burlap.

Finished products can be sold in two ways: either open an additional small bakery that will supply stores and cafes with baked goods, or simply sell flour directly on the spot at an affordable price.

Is it possible to make a mini-mill with your own hands?

Today, of course, a flour mill is sold in any store. But if you don't want a mini device, then you can create a small home mill with your own hands. In order to create equipment for the production of flour, you will need the following materials:

• electric drill
• chisel
• emery
• electric motor
• pen
• loading hopper
• board
• fasteners
• bench
• capacity
• bucket.

When disassembling the electric motor, leave the starter unchanged. In the rotor it is necessary to drill small holes (10 mm) using an electric drill, which will go along an angle. Leave 1.5 cm between each hole.

Use grooves to connect the drilled holes. It is very important to remember that the depth of the grooves should be no more than 2 cm. Using sandpaper, very carefully try to remove the chamfer on the top of the rotor. After installing the rotor in the starter, drill additional holes on the starter cover.

Grain will be poured into these holes, as well as finished products will come out. A loading hopper mounted on the rotor cover will help simplify the process of filling grain. It is worth remembering that the loading hopper and the electric motor must be the same size.

Using a pin, bolts and nuts, secure the handle to the motor shaft. The mini-mill assembled in this way should be attached to the board, and this, in turn, to the bench. The latter should have a hole where the chute for the finished flour will go. Under the bench, on an inverted bucket, place a container into which the products will be poured. After assembly, it is necessary to test the mini-mill.