Neodymium magnet is a type of permanent rare earth magnet that is made by fusing metals such as neodymium, boron and iron. Many people are interested in the question: “Is it possible to make a neodymium magnet with your own hands?” It is almost impossible to set up the production of neodymium magnets at home, since this requires special equipment, melting furnaces, chemical raw materials, as well as powerful electromagnets for magnetizing the resulting alloy. If you need neodymium magnets for your own purposes, then it will be much faster and cheaper to purchase them in our company’s online store.
Accessories for search magnets
Thanks to proper use, transportation and storage, the search magnet will last a long time and will not lose its properties ahead of schedule. Accessories protect the unit from environmental influences and ensure efficient use and transportation.
Ropes for search magnets
Chinese cord and clothesline are the first step to failure. They only look very strong, but in practice they will break during the first dive. An “accident” will happen even if the object is too heavy or simply caught on a snag.
In order not to lose the magnet on your first “fishing”, you need to use a very strong rope
When choosing, it is important to consider its characteristics. For example, if the search involves a magnet capable of pulling out an object weighing 400 kg, then the breaking capacity of the cord should be no less
Particular attention should be paid to the diameter, it should be at least 0.4-0.5 cm. But the length depends on the scale of the search; rope of 10-15 meters is in great demand
Ways to bind a search magnet
The main secret of success is proper lacing. Initially, you need to tie the magnet with a constrictor knot, use a surgical one a little higher, and secure it all with an academic one. Pull and cauterize the end. Tie the cord on your hand so you don’t miss it when casting.
Neodymium magnets in the house
So, where can you get a neodymium magnet at home? Many people don’t even realize that there are many places around us where you can find products made from this rare alloy. There are several places and devices where such magnets are most often used.
Hard disks. Hard drives can be identified as the first place among all devices where you can find such a magnet. Moreover, such a data storage device can be found in any home. Of course, no one will disassemble a work computer or laptop in order to remove a magnet from it. In addition, a hard drive is a high-tech device that is quite difficult to open and disassemble. It is also worth noting that hard drives contain quite powerful magnets, which are not inferior in strength to those that can be bought in a specialized store. Another important point is that modern hard drives have much weaker magnets due to new standards and manufacturing technologies, so it’s better to look for an old drive.
Furniture latches. No one would probably have guessed that you could look for a powerful magnet in ordinary furniture latches that hold the door closed. But a neodymium magnet is very often located inside the latch. This is due to the fact that the surface area of the latch is relatively small, so ordinary magnets will not give the desired effect. Also, the latches themselves quite often break and after that you can disassemble them and remove the magnets, or from old furniture, which is often simply taken to a landfill. But it is worth noting that the power of such magnets is low, so they are not suitable for all purposes.
Engines and generators. Quite often, powerful neodymium magnets can be found in modern electric motors. The power and size of the magnets in the motors are quite large. An important nuance is that the engine or generator itself should not be very old. Because the production of neodymium magnets began relatively recently. Therefore, they most likely will not be found in old Soviet engines.
How to choose a search magnet
Search magnets differ in design, use cases, weight, power and size. Such diversity takes a beginner by surprise. Techniques and life hacks for successful “magnetic fishing” will help you choose a search magnet.
Single sided or double sided
There are two main types of search magnets used in different directions
The choice depends on the conditions of use, so before you buy a single-sided or double-sided unit, it is important to compare their advantages and disadvantages:
| Characteristic | Single sided magnet | Double sided magnet |
| Grip on object | The find is magnetized at the end, so even when working on a rocky bottom, the likelihood of unhooking is low. | Thanks to two working surfaces, it easily attracts an object, but is more likely to be lost when colliding with an obstacle. |
| Terms of Use | The unit is perfect for “vertical fishing”. It is more convenient to search while in a boat or on a bridge. The magnet enters perpendicularly into the water without turning over. | A universal magnet with a double surface that can be used in any environment. It will attract objects, even upside down. |
| Weight | The lightweight device is great for long searches. | A double-sided magnet is a third heavier than a single-sided one, which leads to rapid fatigue of the search engine. |
| Design | It has one eye-bolt fastening and a single working surface. | Equipped with two surfaces and fastenings. |
What weight of search magnet to choose
The average weight of search magnets is 0.2-4 kg. In your arsenal you need to have a unit with a force of attraction of at least 100-200 kg. By purchasing such a device, a search engine will be able to lift a flat metal plate with a smooth and clean surface or small objects from the bottom. In real conditions, fouling with silt, algae, and current weakens the effect of the magnet. As a result, it turns out that having an attractive force of 100 kg, the structure will overpower an object weighing no more than 7-10 kg.
Based on reviews from owners, it is better to choose a magnet with more powerful characteristics - 200-400 kg. They will magnetize interesting things, bypassing priceless pieces of hardware.
You can also buy a magnet for searching in water to make money, but in this case you will need a power in the range of 600-800 kg. Despite their modest weight, they are able to overcome mountains of metal. With their help you can find bicycles, motorcycles and remains of cars.
Table of sizes and main characteristics of search magnets
| Model | D (mm) | H (mm) | M (mm) | Weight (kg) | Force (kg/s) |
| F150 | 68 | 14 | 8 | 0,4 | 190-210 |
| F200 | 75 | 16 | 8 | 0,5 | 230-250 |
| F250 | 86 | 21 | 10 | 0,9 | 320-340 |
| F300 | 97 | 22 | 10 | 1,3 | 430-450 |
| F400 | 107 | 22 | 10 | 1,5 | 530-560 |
| F600 | 130 | 24 | 12 | 2,6 | 690-720 |
| F800 | 132 | 28 | 12 | 3,1 | 820-850 |
| F150x2 | 67 | 24 | 8 | 0,7 | 190-220 |
| F200x2 | 75 | 28 | 8 | 0,9 | 250-280 |
| F250x2 | 86 | 33 | 10 | 1,4 | 330-360 |
| F300x2 | 97 | 35 | 10 | 1,9 | 430-450 |
| F400x2 | 107 | 35 | 10 | 2,2 | 540-570 |
| F600x2 | 130 | 39 | 12 | 4,0 | 690-720 |
Objective rating of search magnets
At the moment, the absolute market leaders are:
- Forceberg F-200. A model that rightfully tops the list of the best search magnets due to its characteristics. Despite its modest dimensions, it provides traction of 220 kg. And two eye bolts are used to separate the magnet from the find and make searching easier. Wear less than 1% in 10 years.
- Redmag F-200. The modification is famous for its compliance with the specified power declared by the manufacturer. The maximum tensile strength of the presented model is 200-225 kg. An improved design made of metal and neodymium, with the addition of iron and boron impurities, strengthens the assembly several times, giving it additional strength. Used to extract scrap metal from water, soil and even construction waste
- F-300 superpower. The model is designed to search for steel objects and scrap metal. In calm conditions (in the absence of current), the unit is capable of pulling about 200 kg, in other cases the figure decreases several times. The device weighs 1.9 kg. This modification is perfect for beginner search engines.
- Nepra F-200. Improved unit with additional corrosion protection. Nickel plating and galvanizing of the cup extend the life of the magnet, protecting it from rust. The maximum adhesion force is 200 kg, it is achieved only in ideal conditions, and decreases when immersed in a body of water. Among the disadvantages, in comparison with competitors, we can highlight the rate of loss of attractive forces - over 2% over 10 years.
You need to select and buy a magnet based on the specific application. For beginner searchers, a basic lightweight model with a small force of attraction is suitable
More experienced fishermen should pay attention to the updated modification for retrieving large finds.
Advantages
The most common neodymium magnet is one that has an iron oxide alloy, which has good heat resistance, high magnetic permeability and low cost. Equipped with color coding, high coercivity, powerful magnetic field to hold objects suspended, compact size, light weight, affordable and wide range of applications. Has a long service life.
If an ordinary magnet works for 10 years and can be demagnetized, then a neodymium magnet does not lose its properties after 100 years. Another advantage is the shape. This product has a horseshoe shape. It gives the device a long service life. As for the cost, these are expensive products, but the cost is justified by excellent performance and impeccable reliability.
Durability of work as one of the advantages
Force
It is worth pointing out that the strength contained in neodymium magnets is another advantage. She is tall and it is impossible to find a competitor to her. This is a record type of indicator, the increase of which is impossible. Power is generated during manufacturing. Magnetization occurs after the alloy is formed. Thanks to existing technologies, the alloy is magnetized in such a way that the magnet has incredibly high power and this figure reaches a record.
You might be interested in: Features of static electricity
Note! Power is a relative philistine concept. The force is stable, but it is measured using instruments. In this case, the readings depend on the thickness of the surface and cleanliness. The separation angle can have some influence.
Strength as one of the advantages
What can you catch?
Fragments of historical monuments - knives, weapons from the times of the Great Patriotic War - are often recovered from the bottom of lakes and rivers. A magnet with good attractive force will pull out hidden treasures in wells and garbage pits. Cossack sabers were repeatedly raised from the Dnieper. All products containing iron and ferromagnetic metals will be attracted to the magnet.
Pure gold is not magnetized, but such jewelry also contains a ligature (a mixture to impart strength). For example, products of 585 standard contain 41.5% other metals, including nickel, which is highly attractive.
You can also find silver, but not all its varieties can be raised. Sets of past centuries, with the addition of ligature, are often mined from the depths of centuries-old lakes.
Stainless steel is magnetic to varying degrees, depending on the alloys added. Aluminum, brass, bronze, tin, lead and copper will not be attracted.
Often in your finds you can find metal sealed cylinders worn by German soldiers. They kept their valuables in them.
Places to find relics
Ideal search places are military crossings and centuries-old bridges. Valuable finds can be discovered when examining mill whirlpools and pre-revolutionary wells. The drains, cesspools and station toilets surprise you with their artifacts.
Search for valuable coins
Only cheap royal change will not be attracted to the magnet, but medium-denomination coins made with an admixture of nickel and chromium will delight their treasure hunter. You shouldn't count on expensive coins, because... They were made of gold and silver, which means they are very weakly magnetized.
About neodymium magnets
Compound
Neodymium is a rare earth metal with powerful magnetism endowed by nature. In the periodic table, the chemical element occupies position 60. It is not found in nature in its pure form. It is isolated from a substance such as didymium, where it is found in a mixed state with other lanthanides.
Despite being a “rare earth”, the element is quite common in the earth’s crust. The main metal production is concentrated in China.
In answer to the question of what a neodymium magnet is, it follows that it is an alloy of neodymium and iron with the addition of boron. In order to obtain such an alloy, the outgoing components are reduced to a powder state. After mixing, the composition is baked in a special oven, placing the mixture in molding containers in advance.
Peculiarities
The rare earth metal Nd cannot be used in its pure form due to its poor corrosion resistance and softness. To reduce these disadvantages, magnets began to be made from the above-mentioned alloy. It was possible to obtain a powerful magnet that is not susceptible to corrosion processes and can withstand high temperature conditions (up to 1400C).
Application
Neodymium magnets have found wide application in engine building for the aviation industry. In some medical devices, NMs play an important role as the main functional parts. In everyday life, these are various magnets that are attached to refrigerators. They are also used to make various puzzle toys.
NM makes excellent knife holders for kitchen walls. Disc-shaped magnets are used to hold furniture doors closed. Home craftsmen invent various household gadgets, demonstrating what can be made from a neodymium magnet.
In industrial production, neodymium magnetic products are used in various filtration systems to capture the smallest metal particles. Using NM, production areas are cleared of metal shavings. Cereal seeds are treated with magnets to increase yield.
A plug with a neodymium magnet is installed in the car engine crankcase, which removes metal chips from the engine oil.
Is it possible to make it yourself?
NMs are quite expensive. Many homemade DIY enthusiasts are trying to learn how to make a powerful magnet from neodymium alloy themselves. In fact, the production of NM is a complex technological process that cannot be reproduced in everyday conditions.
The fact is that neodymium magnets can only be made using powder metallurgy. The production of NMs involves sintering neodymium, iron and boron powders. The complex process involves special technological equipment. Therefore, the only way to acquire powerful neodymium magnets is to use disassembly of discarded electronics or other devices.
Additional Information. It is strictly forbidden to drill or crush neodymium magnets. If their integrity is damaged, magnets lose their properties. The same thing happens if magnetic surfaces are damaged.
The amazing properties of magnets have always attracted the inquisitive minds of people. The use of magnetic field sources has brought world civilization many valuable inventions in almost all spheres of human activity.
Strengthening the electromagnet
To understand how to increase the strength of a magnet, you need to understand the process of magnetization. This will happen if the magnet is placed in an external magnetic field with the opposite side to the original one. An increase in the power of the electromagnet occurs when the current supply increases or the turns of the winding are multiplied.
You can increase the strength of a magnet using a standard set of necessary equipment: glue, a set of magnets (you need permanent ones), a current source and an insulated wire. They will be needed to implement the methods of increasing the strength of a magnet, which are presented below.
Reinforcement with a more powerful magnet
This method involves using a more powerful magnet to strengthen the original one. To implement this, you need to place one magnet in the external magnetic field of another, which has greater power. Electromagnets are also used for the same purpose. After holding a magnet in the field of another, amplification will occur, but the specificity lies in the unpredictability of the results, since for each element such a procedure will work individually.
Strengthening by adding other magnets
It is known that each magnet has two poles, and each attracts the opposite sign of other magnets, and the corresponding one does not attract, only repels. How to increase the power of a magnet using glue and additional magnets. This involves adding other magnets to increase the final power. After all, the more magnets, the correspondingly greater the force. The only thing that needs to be taken into account is the connection of magnets with like poles. In the process, they will repel each other, according to the laws of physics. But the challenge is gluing, despite the physical difficulties. It is better to use glue that is designed for gluing metals.
Curie Point Enhancement Method
In science there is the concept of the Curie point. Strengthening or weakening of a magnet can be done by heating or cooling it relative to this point itself. Thus, heating above the Curie point or strong cooling (much below it) will lead to demagnetization.
It should be noted that the properties of a magnet when heated and cooled relative to the Curie point have an abrupt property, that is, having achieved the correct temperature, its power can be increased.
Method No. 1
If the question arises of how to make a magnet stronger if its strength is regulated by electric current, then this can be done by increasing the current supplied to the winding. Here there is a proportional increase in the power of the electromagnet and the current supply. The main thing is ⸺ gradual feeding to prevent burnout.
Method No. 2
To implement this method, the number of turns must be increased, but the length must remain the same. That is, you can make one or two additional rows of wire so that the total number of turns becomes larger.
This section discusses ways to increase the strength of a magnet at home; experiments can be ordered on the website.
Neodymium magnets: what is this material?
According to scientists, this development took about 20 years of research and testing. When choosing materials, many factors were taken into account: availability, manufacturability, safety, high magnetic properties, resistance to environmental conditions. Scientists considered the use of rare earth metals to be a promising direction. And neodymium was just perfect for these purposes.
Magnets based on it have amazing adhesive strength. Even a small volume of material can support many times its own weight. Magnetic properties last a long time (lose no more than 2% over 10 years of use). Nowadays neodymium magnets can be purchased in specialized stores. Their prices are affordable to almost anyone.
Magnets on sale
In fact, magnets can be found in the most unpredictable places. These could be knife holders in the kitchen, wall clocks, various figurines, jewelry, and decorative items. In general, any objects that have magnetic properties can contain neodymium. The question is whether a magnet found at home in a household appliance or hard drive is suitable in terms of power and size... Also, industrial magnets are made with a thread or hole of the required shape and diameter. If a neodymium magnet is needed for business, then it is better to think about buying a real large magnet.
Electrical engineering
| REPLACING THE PHILIPS VACUUM CLEANER MOTOR |
Literature
- R. Feynman, R. Layton, M. Sands
. Feynman lectures on physics. Vol. 7 “Continuum Physics”. - M.: Mir, 1966 - “PERMANENT MAGNETS HANDBOOK” / ed. Yu. M. Pyatina. - M.: Energy, 1980
- Kunevich A.V., Podolsky A.V. Sidorov I.N.
Ferrites: Encyclopedic reference book. Magnets and magnetic systems. Volume 1. - M.: Lik, 2004.
For further reading
:
- Strnat K., Hoffer G., Ostertag W., Olson JC
Ferrimagnetism of the Rare-Earth-Cobalt Intermetallic Compounds R2Co17 // Journal of Applied Physics. - 1966. - March (vol. 37, no. 3). — P. 1252—1253. — ISSN 0021-8979. — DOI:10.1063/1.1708420. - Strnat K., Hoffer G., Olson J., Ostertag W., Becker JJ
A Family of New Cobalt-Base Permanent Magnet Materials // Journal of Applied Physics. - 1967. - March (vol. 38, no. 3). - P. 1001-1002. — ISSN 0021-8979. — DOI:10.1063/1.1709459.
Is it possible to create a neodymium magnet yourself?
Many have wondered about creating such a magnet at home, but, unfortunately, it will not be possible to create such a device at home. The most advanced technologies, equipment and tools are used to produce such magnets. Therefore, it will definitely not be possible to create such a device without special tools. The magnet itself is made in an interesting way, the material for manufacturing is crushed, then sintered in special furnaces and then it is given the power of a magnet. Therefore, it will not be possible to repeat this at home. But many people don’t even realize that neodymium magnets are found in household devices and various appliances, and after the device fails, the magnet can be removed and used for various purposes.
Method two
The production of permanent magnets can be carried out in another way. This requires a battery. With its help you can magnetize any suitable material. This is done quite simply and does not require special tools. An electromagnet gives a metal object magnetic properties.
Let's look at an example with a screwdriver. To begin with, the tool should be wrapped in an insulator, and then wound about 300 turns of wire. It is better to use the one that is used for the manufacture of transformers. After this, the wire must be connected to a battery or battery, preferably 5-12 volts. As a result of such manipulations, the electromagnetic field will magnetize the screwdriver.
Application
Traditionally, they are used in electronic devices and devices where it is necessary to create a constant magnetic field. The properties of the material make it possible to successfully use them when searching for and lifting metal objects from the bottom of reservoirs. Such structures, in addition to the eye for fastening the cable, are equipped with an eye bolt, which is simply necessary, since when screwed in, it allows you to separate two strongly adhered surfaces.
Magnets are available in sizes from 1 to 120 mm in diameter and in different thicknesses and shapes. The thinnest of them are widely used in the leather goods and furniture industries. They can be found in funny toys and devices for hanging various utensils. Powerful magnets are indispensable for filtering bulk and liquid materials. They are used to catch metal impurities and foreign objects in the conveyor flow.
The high adhesive force encourages people to use them to achieve “savings” when using water and gas. By purchasing neodymium magnets for counters, they thus try to stop or slow down the rotation of their mechanism. This possibility theoretically exists in devices where steel elements are used internally. A powerful magnet placed in a specific location on the housing can slow down the rotation of the impeller.
Natural and artificial origin
In medieval times and until the end of the 18th century, researchers actively studied the characteristics of rock with a magnetic field. In fact, then people did not know about the existence of other substances that generate this field. But at the beginning of the 18th century, the famous scientist Arago, and soon Ampere and Seturgeon, managed to invent an object with a magnetic field of artificial origin. It was formed as a result of the supply of electric current, which was a real technological breakthrough. Soon the technology began to be improved in every possible way, turning metal products into powerful variable magnets.
The most mysterious ancient observatories
Today magnets are classified into the following types:
- Natural or natural.
- Artificial.
Representatives of the first group are deposits of a special rock. The largest natural magnet ever found weighs 13 kilograms and guarantees an adhesive force of up to 40 kg.
As for artificial magnets, they are iron products that create a field when an electric current is applied to the stitching with the core. However, today there is a special type of magnets that is created by man using advanced technologies.
What you need to make a search magnet
To make a search magnet we cannot do without:
- Welding machine. You will need any welding machine or inverter for domestic needs;
- Bulgarians. There should be a circle for cutting metals on it;
- Hammer. It's best if it's a sledgehammer;
- Some other tools to bend and fasten.
The materials you will need are a pipe and a metal rod, epoxy glue, and, of course, a neodymium magnet. The beauty of neodymium magnets is that they have a very high adhesive force, such that it is very, very difficult to separate a magnet that has stuck to a metal surface.
We recommend using N42 neodymium magnet. However, you can use any other neodymium magnets if they are available. The higher the adhesion force of the magnet to the metal, the better, and you will be able to get more treasure from the bottom. The best option for these purposes is considered to be a magnet with a pull-out power of more than 200 kg.
Is it possible to make neodymium magnets with your own hands?
Industrial technology, in addition to sintering the mass into an alloy, also involves a complex process of magnetization of the resulting substance, which is inaccessible for home conditions. Very powerful force fields are used for this. If you have a great desire to obtain neodymium magnets yourself, you can do this yourself by disassembling “obsolete” electronics.
In some old hard drives you can find one or two small elements inside. It is not advisable to try to drill or crush such magnets. The surface protective layer is damaged, the material reacts with the environment and loses its properties. In addition, as experts say, the shavings are highly flammable and can ignite surrounding surfaces.
Compound
Magnets based on this rare earth metal are designated by the formula Nd2Fe14B. The composition includes neodymium (Nd), iron (Fe), boron (B). The peculiarity of the technology is that this rare earth metal is difficult to isolate in its pure form. The sintering process with the remaining components in powder form must take place in an inert environment. Otherwise, its rapid oxidation occurs with loss of properties.
The technology for normal conditions is complex, so trying to make neodymium magnets with your own hands is impractical. Products are marked during production. The number after the letter N (25, 30, 45) indicates the code. The higher the indicator, the stronger the magnetic properties of the material. The maximum operating temperature of the magnet also depends on the number.
Main types
In addition, the listed types of magnets may differ in the principle of their operation. So, today the following types are distinguished:
- Constant.
- Temporary.
- Electromagnet.
The first two varieties are characterized by different degrees of magnetization and time of retention of the field within themselves. Its intensity and resistance to external influences is determined by the composition of the material. The latter type does not belong to the group of true magnets, because it works due to the effect of electricity created by the magnetic field around the core.
Permanent and temporary magnets are created from different raw materials. in its quality :
- Neodymium.
- Bor.
- Cobalt.
- Alnico.
- Iron.
- Ferrites.
Peculiarities
To prevent exposure to environmental conditions, the magnets are coated with a protective compound. Typically these are two layers of nickel or an improved version with an additional layer of copper in between. Another important feature is that neodymium magnets begin to demagnetize at temperatures above 70 °C. Exceeding the limit values can lead to a complete loss of properties and the alloy turning into just a piece of metal.
The specifics of the material require special safety measures during operation. Thus, neodymium magnets 50x30 mm have an adhesion force of 100 - 115 kg, and 70x50 mm up to 300 kg
If handled carelessly, they can cause harm: pinching fingers, injuring the skin, damaging bones. In the event of an uncontrolled collision of two magnets, the material may crumble with the formation of sharp fragments that can injure the eyes
Options
As the linear dimensions of the magnet increase, its performance indicators increase. Depending on the task at hand, you should carefully choose, since the cost of various models can range from $30 to $300.
| Holding weight, kg | Magnet weight, kg | Diameter, mm | Height, mm |
| 300 | 1,2 | 96 | 18 |
| 400 | 1,4 | 106 | 18 |
| 600 | 2,2 | 140 | 30 |
But what is a search magnet without the appropriate equipment?
Search Magnet Care
To use a search magnet for a long time, it is important to properly care for it. There are no special requirements for processing the coating, but you need to wipe it with a dry cloth and clean it of small adhering metal particles. . The magnet is a fairly reliable tool; its service life depends on the characteristics of use.
Over a decade, it loses no more than 1% of power.
The magnet is a fairly reliable tool; its service life depends on the characteristics of its use. Over a decade, it loses no more than 1% of power.
Do not hit or heat the device. When exposed to temperatures above 80 °C, it will lose its magnetic properties and turn into a useless piece of metal.
Important! The design negatively affects the operation of electronics; the damage radius depends on the power. When searching for artifacts, you should keep smartphones and laptops at a safe distance, and it is better to store search magnets in special bags (more details below).
Demagnetization of search magnets
Even the most powerful magnets lose their properties over time. Ferrite products will last for several decades, but neodymium products will last 200-300 years.
Causes of involuntary demagnetization:
- Heat. When heated above 80 ⁰C, the magnet will completely lose its attractive force. Only some models have increased resistance to temperature changes and can withstand up to 200 ⁰C.
- Strong blows. Mechanical impacts on a magnet (impact, falling from a height) deprive it of its value.
- Errors when cutting and drilling. Strong pressure when processing a magnet with a grinder can lead to loss of characteristics.
- Impact of external factors. When exposed to a magnetic field with an induction of about 3-4 Tesla, the magnet can be demagnetized.
It will be possible to restore the lost properties only in large-scale production using an industrial magnetization installation.
How to make a search magnet with your own hands
First, let's take a piece of metal pipe that would fit the diameter of the neodymium magnet. Let's cut the pipe with a small margin, so that the magnet can easily fit into it. The pipe will act as a kind of clip for placing a neodymium magnet in it.
It is very important to process the edges of the pipe and make its surface as smooth as possible. Otherwise, a home-made search magnet may cling during search work, which will cause a lot of inconvenience.
To grind a piece of pipe under the holder, you need to use an angle grinder - an angle grinder.
After the clip is ready, take a piece of rod with a diameter of 10-12 mm and bend it into a semicircle. The idea is to make an “eye” out of it for attaching a rope or cable to a search magnet. After the rod is bent, it should be welded to the side of the metal holder from the pipe. How to use welding, read here mmasvarka.ru.
At the final stage, all that remains is to install the magnet in the holder, and then fill it around the edges with epoxy glue
For reliability, coat the inner walls of the pipe with epoxy, and carefully, being careful not to injure your hands, install the neodymium magnet into the pipe
After installation, if there is a small space left between the pipe and the magnet, you must get rid of the voids. For these purposes, you can use pieces of nails or thin metal, not forgetting to fill the whole thing with epoxy glue.
It is important that a search magnet assembled with your own hands will dry for at least three days. Therefore, you need to be patient, and only after the epoxy has completely dried can you go in search of the treasure
Good luck to you treasure hunters!
Master class 4. Magnets from plastic mini-toys
The most stylish magnets can be easily made from plastic toys, namely animal figurines.
Materials and tools:
- Scissors or sharp knife;
- Thermal glue in a gun;
- Paint and brush if necessary;
- Small magnets;
- Plastic animal figurines.
Instructions:
- Cut the toy in half or lengthwise.
- Pour hot glue into the inside of the resulting workpiece to the very edges and leave to dry.
- When the glue has hardened, start painting the craft (including the “filling”) in 1-3 layers. At the end it can be additionally varnished.
- Now just glue the magnet to the figure and enjoy the result!
