Search magnets are divided into three groups according to their capabilities.

Youtube

Search magnets are magnetic systems that include a magnet made of Nd-Fe-B alloy housed in a steel housing. The body and magnet are coated with a zinc protective coating. To attach it to a cable or rope, you need an eye bolt, which usually comes with a search magnet. With the help of an eye bolt, the magnet is torn away from the metal object to which it sticks. To do this, you just need to screw the eye bolt into the body, and gradually it will move away from the metal surface. There is a more powerful magnetic trawl system, which consists of several magnets assembled in one stainless steel housing. The main advantage of this system is the uniform distribution of magnetic fields throughout the working space and a large magnetic field output.

As a rule, search magnets are used to detect ferromagnetic objects in lakes, swamps, and wells. It is used to clear the area of metal debris before searching with a metal detector. Trawling of reservoirs is carried out using a magnetic trawl with a large usable area. Search magnets work due to the ability of permanent magnets to attract metal objects.

Before you start working with a magnet, you need to carry out some preparatory measures. First, you need to screw the eye bolt into the housing so that its end does not stick out on the working surface. To prevent it from accidentally unscrewing, you should tighten its nut all the way with a wrench, holding the eyebolt earring. After this, you need to tie a nylon rope to the earring - and the search magnet will be ready for use. If you use an eye bolt to separate a magnet from an object, the nut must first be unscrewed.

There are several nuances that need to be remembered for successful work with search magnet. The greatest holding force is possible only if the surface of the metal object is clean and smooth, and the object's area is greater than or equal in size to the working surface of the search magnet. The thickness of the metal sheet must be at least 5 mm.

Additional Information:

In the phrase where you can get neodymium magnets, the third word is key. If it said “buy”, then everything would be clear..

But it says “take.” That is, we mean a purchase with 100% cost savings. In this case... yes, in general, nothing complicated either. Just turn on YouTube. And to the question of where to get a neodymium magnet at home, the video will show several answer options.

Where to get a neodymium magnet at home: familiar methods

Speaking of where to get a neodymium magnet at home, let's first look at the more well-known places:

The most popular unit, which only the lazy do not know about among those interested in where to get a neodymium magnet, is HDD computer. One or two NdFeB products are installed inside it as part of a ring. Anyone who is going to get them must remember two features. Firstly, the older the drive, the better. Previously, neodymium chips with a strong attractive force were installed, but now they make do with weak ones. Secondly, a magnet is glued to a metal screen. You need to knock it down by holding the record in a vice. This should be done carefully, because the ingot may break. Or the protective coating will be destroyed. You can try to melt the glue, but know that NdFeB cannot be heated too much. Brand N models lose their properties at temperatures higher than + 80 degrees C. And the glue softens only after heating to 140 - 160 degrees C. However, those who tried it say that no significant deterioration in the pull-off force was noticed.
In the second case, when asked about where to get neodymium magnets, the video will show a stepper motor from office equipment: scanners, printers, copying machines. It has a rotor consisting of two metal plates on a shaft, between which there is an NdFeB ring. To pull it out, you need to clamp one of the plates in a vice and knock out the axle. Attention! You need to place the rotor vertically, fix the top plate and knock the axis down. If you pinch the bottom one and knock it down, the magnet will burst. Approximate size: 18 x 4 x 5 mm.
The third option where you can get a neodymium magnet is an old CD or DVD drive. Here NdFeB “sits” in the optical head, in two copies, usually rectangular in shape. The sizes are small.
The fourth place where it is easy to get neodymium magnets is in mini headphones. The NdFeB product is present in the form small disk, the size depends on the manufacturer. Attractive force - 0.3 kg or slightly more.

And not really

In addition to the nodes listed above radio-electronic equipment where to get a neodymium magnet, the video also shows not very well-known places. Here are some of them:

If a motorist needs a neodymium magnet, where to get it at home, you don’t have to look for long. It is enough not to throw away burnt out bi-xenon lamps. Switching from high beam to low beam occurs due to a change in geometry luminous flux. For this purpose they are equipped with a curtain. It moves, opening or closing areas of the lamp, under the influence of a magnet. Bi-xenon lamps contain neodymium in the form of cylinders with a hole or pin. The attractive force is about 1.5 kg. In old Chinese products - 2 times less.
If someone has a locksmith's set with a handle and replaceable bits for nuts and screws, then sometimes he also needs neodymium magnets, where to get them in everyday life - you have to think. The handle comes with an NdFeB disk, which sometimes falls out and gets lost. It's inconvenient to work without it. You can find an unnecessary bit extension. Or buy it, the price is about half a dollar. And pull out the desired “tablet” with a diameter of about 4 - 5 mm.
The next option for those who are looking for neodymium magnets where to get them in everyday life is Bakugan toys. Each one is made in the form of a transformable ball. An NdFeB disk is placed inside. Once on the metal Gate Card, it opens up, turning into a monster. If funny characters don't interest you, Bakugan can be disassembled. The larger the toy, the stronger the magnet. The largest product has a diameter of up to 2 cm.
To answer the question about where to get neodymium magnets in everyday life, the video can show how they are disassembled acoustic speakers. That's a moot point. Most speakers are equipped with ordinary ferrites. Neodymium people can be found occasionally, on modern models. There is no point in disassembling them, they are still new, they are very expensive, they work for a long time, and almost do not break.

If someone is still thinking about disassembling imported acoustics for the sake of an NdFeB disk, then it is better to pay attention to a cheaper answer to the question: where to get a neodymium magnet at home. The algorithm is as follows:

At home, go into a room with a computer, turn it on and load the store’s website.
Choose suitable disk, rectangle, ring or rod made of NdFeB alloy.
Place an order, transfer funds, receive the goods.

Result: much less money was spent than for acoustics, the speakers remained intact. A win in every way!

First of all, these will be objects made of iron and cast iron. The water hides many historical monuments in its depths. Most often, weapons are raised from the bottom of reservoirs. Using a search magnet, you can easily pull out hidden treasures in wells and garbage pits, if they were placed in a metal box for better preservation.

Search magnets have proven themselves best in searching for items and artifacts from the First and Second World Wars. With the help of neodymium search magnets, Cossack sabers were repeatedly pulled out from the Dnieper, and many artifacts were recovered from Lake Ladoga. Absolutely all products made of iron or containing ferromagnetic metals are attracted by a neodymium magnet.

Search magnet design

Design search magnet very simple and practical. In the middle there is a very brittle alloy of rare earth metals, boron and iron, which is enclosed in a stainless steel or aluminum housing, or perhaps simply a nickel coating of the magnet. All free space It is filled with epoxy resin, which is why it is not recommended to heat it above 60 degrees. A repair bolt is screwed into the magnet from above or on the side to attach a rope or cable. When attaching the repair bolt vertically, it is easier to tear the magnet off the surface. Simply screw in this bolt using a lever, and the pin itself will tear the magnet off the surface.

Attention! When heated above 80 degrees, a neodymium magnet loses its properties.

Metals that are attracted by a search magnet

Gold

First of all, all search engines are interested in gold. I’ll say right away: pure gold is not magnetic to a search magnet! However, most jewelry has a ligature added to it. Alloys are metals that are added to gold to increase strength and resistance to mechanical and temperature influences.

For example, in the well-known 585 standard gold there is only 58.5% pure gold, and the rest - 41.5% - are other metals, one of which is nickel. It is precisely due to the nickel content that jewelry “clings” to a magnet. But you shouldn’t hope too much for this, since the nickel content is very small and jewelry is not strongly attracted to a neodymium magnet. To do this, you need to touch the magnetic surface directly to the jewelry.

Silver

The second important search metal is silver. Silver also has two varieties: which is magnetic and which is not magnetic))

It is worth noting that some antique silver services and sets of cutlery were sometimes made from silver, which is taken with a magnet (with the addition of a ligature).

Stainless steel

Stainless steel, depending on its alloys and impurities, is magnetic to varying degrees. There are only a few of its species that have very little contact. The rest of the part sticks quite well for the reason that it contains from 12 to 20% chromium. Not magnetic at all:

● Aluminum
● Brass and bronze
● Tin
● Lead
● Copper

Important! Neodymium search magnets are very resistant to corrosion. Special attention should be given protective coating. If the coating is damaged, it should be immediately restored using epoxy resin or paint. If a magnet begins to oxidize, its characteristics can drop by more than 10 times, that is, from 600 kg to 50!

We figured out what metals are attracted by a search magnet. However, we should not forget that during the Second World War, German soldiers always carried a sealed metal cylinder with them in which they kept their most valuable things. It is these cylinders that can be found with a search magnet.

Search magnets are divided into three groups according to their capabilities:

1. One-sided. Perfect for vertical search (from piers, bridges and boats).

2. Double-sided. Universal search magnets. Great for almost any conditions. The fact is that when moving a magnet along a silted bottom, a one-sided magnet with an unknown side goes along the bottom, but a double-sided one will capture objects from both the upper and lower planes.

3. Trawl magnets. They are most suitable for guiding along the bottom. But you should take into account the fact that a magnet weighing over 1.5 kg will be difficult to carry around on an inflatable rubber boat using oars.
Important! With strong impacts and slight deformations, magnets lose their properties. When identical magnets are connected, their attractive power does not double, as we would like, but only increases by 30%.

Advantages and Disadvantages of Very Powerful Search Magnets

Powerful (especially double-sided) magnets for searching, as is already clear from the above material, are much more interesting for searching. Their main advantage is power. Getting a more valuable find (especially if we talk about precious metals that are magnetic) with its help is much higher.

However, powerful magnets have their own flaws:

1. A very powerful magnet (500 kg or more) will be difficult to throw over a long distance, since it weighs more than 4 kilograms.

2. The breaking load with high-quality engagement is much greater than the physical capabilities of a person.

3. The quality of the rope must be high and have a 2-fold safety margin. This is necessary in order to be able to pull out a snagged search magnet from a flooded tree or crevice.

4. Carrying a heavy object for a long time is very tiring.

According to the type of fastening, repair bolts are divided into two types: with vertical fastening and lateral fastening.
For moderate results, a double-sided magnet with an attractive force of 140-200 kg and a lateral fastening of a repair bolt is sufficient. It is quite possible to carry such a magnet all day, although it is possible that the next day you will feel a slight pain in your muscles (without special preparation).

Using search magnets when searching with a metal detector

Many people use metal detectors, but less than half use a pinpointer. Everyone is familiar with the situation when there is a clear signal from the excavated soil, but the target is not visible. You can even move a pinpointer along the ground, hear the target, and find nothing. A neodymium magnet for searching is a great help here: if the target is magnetic, it will instantly stick to the surface. For such cases, using a magnet of 40-80 kg is sufficient.

Attention! It is very convenient to use a fabric bag. Metal debris, of which there is a lot in the ground, does not stick to the magnet. The fabric will also save you from mechanical damage and eliminate the possibility of dangerous corrosion.

Clear advantages of neodymium magnets compared to a pinpointer:

1. Their batteries don’t run out, and you don’t forget to turn them off all the time
2. Silence (in cases where your presence should not be advertised)
3. Small dimensions. Convenient transportation. You can simply carry it in your pocket.
4. The target itself clings to the surface.
5. Price. You can buy 5 magnets for the price of one pinpointer.
6. Resistance to mechanical damage and moisture.
7. Long service life if basic rules are observed.

Important! Neodymium search magnets lose magnetization approximately 0.1% to 2% per 10 years! Then it’s up to you to decide which search magnet to choose; we can only recommend a proven brand that does not deceive with the declared power - “World of Magnets” (see the brand in the description of the magnet).

Search for valuable coins

The list of coins that can be found using a search magnet is quite impressive. Cheap royal change is not accepted for magnetism, but medium denomination coins were made with the addition of nickel and chromium, which immediately indicates the magnetic properties of these coins. The most expensive large denomination coins, made of gold and silver, cannot be lifted using a search magnet; they interact with the magnet, but very, very weakly.

How to distinguish a counterfeit coin from an original using a search magnet

To do this, you need to place a neodymium magnet at an angle of 45 degrees, attach the original coin (which you are completely confident in) to its surface and release it. At the same time, it should smoothly go down. The fake, unlike the original, will go down very quickly. This applies to almost all coins that are not picked up by a magnet.

Important! When checking, it is better to use cellophane or polyethylene to cover the magnet, because coins in exceptional collectible condition have a chance of being damaged.

Purchasing a neodymium magnet is a good investment

The main problem with search magnets is the price, which has skyrocketed since 2009: 95% of rare earth metals are extracted and processed in the Middle Kingdom, and they are used for automotive production. This country has introduced additional duties on the export of magnets from its territory. Throughout 2011, neodymium increased in price 5 times! Neodymium on exchanges has risen in price by no less than 50% in just 2017!

↓↓↓ Don't miss the discussion of this topic in the comments. Scroll down the page ↓↓↓, there are opinions and reviews of diggers, MD specialists, Additional Information and clarifications from the blog authors ↓↓↓

P.S. Please note ➨ ➨ ➨ Bomb theme - . Take a look, you won't regret it.

Typically, powerful magnets are designed to find precious metals. A search magnet reacts to gold and silver quite strongly, and although it is difficult to find them in their pure form, its power is enough to pick up jewelry and coins from the ground. The main goal of all search engines is treasures, expensive coins, and sometimes just ferrous metal.

The article will describe the structure of the magnet and the basic principle of operation. He will also figure out what exactly can be found with its help and how to find expensive alloys. It will be explained in detail what ferromagnets, paramagnets and diamagnetic materials are. In addition, there will be given valuable advice and recommendations that will greatly simplify the search for valuable items.

Search magnet device

This device consists of a steel case, inside of which there is a neodymium magnet. It is made from a rare alloy containing neodymium, iron and boron. This compound has a powerful attractive property. Despite its compactness, it is capable of holding things tens of times its own weight.

To make it easier to get various things, the case is equipped with a special mount. It is screwed into the magnet body via a thread. On top of the fastener there is a fastener in the form of a hook or loop that will hold the cable or rope. This mount has a rigid base that is firmly screwed into the body. The entire structure has a reliable foundation, and in this case, there is no fear in lifting any expensive and heavy thing.

Principle of operation

The search magnet has rather poor functionality. The main task of such an object is to attract as many metal objects as possible. But the device copes with its main task more than good. Thanks to its unique design, it has great strength and is able to hold quite large objects, as well as objects containing gold or silver, which ordinary magnets cannot handle.

This is especially convenient when getting things out of wells, funnels and various pits. It's also good to use this thing underwater. In water, all objects are subject to great resistance, and picking up any object becomes a rather labor-intensive task. But with a neodymium magnet, searching and removing such objects is greatly simplified.

What items can be found

When asked what kinds of things can be found using a search magnet, iron objects, including coins, immediately come to mind. Almost all paramagnetic metals can be found. Simply put, materials that are attracted to the magnet body, but more on that later. Such coins, or precious metals, can be of great value. For example, you can find iron coins from the period of Tsarist Russia, as well as many rare Soviet coins.

Powerful magnets can attract metals such as:

aluminum

Most searches are carried out in attics, in various beaches and in public places where people can lose things, as well as in wells and pits. In such places they usually find costume jewelry, expensive jewelry, various metal boxes, and sometimes even expensive mobile devices(on the beach). This is what finding things on land is all about.

As for water, you can also find many valuable things, including gold jewelry. Also, thanks to superstitions, a whole fortune of coins can be raised from the bottom. Moreover, there is no need to get coins from city fountains, since there are quite a lot of abandoned wells that no one needs, but they store precious things.

Does a magnet attract gold and silver?

Is it possible to find pure gold or silver with powerful magnets? No, since such metals are diamagnetic, that is, they are not attracted to magnets. But it's not all bad, thanks to all the power of neodymium alloy, it is possible to get some jewelry. Such objects usually have a ligature in them.

This alloy helps precious metals such as gold or silver acquire certain properties. For example, silver jewelry does not darken as much, but gold jewelry is more durable. But the most important thing is that the ligature allows magnetization and makes it possible to find various alloys.

But it is also possible to find pure gold or silver. At the beginning of the article it was said that iron boxes can be found. Typically, jewelry made of gold or silver is stored in such cases. So, walking through an attic or similar places, you can get rich, in the literal sense of the word.

Magnetic properties of various metals

In order to go hunting for valuable metals, you need to know what exactly will be attracted to a magnet. Since metals have different magnetic properties, and some do not have them at all. They can be divided into three groups:

ferromagnets

paramagnets

diamagnetic materials

Ferromagnets are metals with some of the best magnetic properties. Such metals are highly magnetic. These include ferrous metal.

Paramagnetic materials have the usual properties; they are readily attracted to a magnet, but do not have the function of magnetization. These include some alloys of jewelry and several types of non-ferrous metals.

And finally, diamagnetic materials. Such alloys are extremely difficult to magnetic field and make it very difficult to find truly precious things. Diamagnets include gold, silver, aluminum, patina and other metals that even the strongest magnet does not pick up.

Is it possible to find gold with a magnet?

As discussed earlier, jewelry and coins with gold can be lifted, but it is very problematic.

It is impossible to get pure gold with a magnet.

But if various factors are favorable, such as an iron box or paramagnetic jewelry lying nearby, then there is a chance to find it. Basically, only jewelry containing gold, such as bracelets, earrings and rings, can be caught with a magnet. The best place for searches there is a sandy beach, wells, as well as the sea or river bottom where they swim a large number of of people.

An inquisitive mind constantly finds something new around itself. The same goes for different magnets. Once we found out how useful this thing is, the question immediately arose - where are neodymium magnets found? It turns out, almost everywhere! This is really so, and to be convinced, just look around. There are many places where you can find a neodymium magnet.

Thanks to its exceptional qualities - incredible magnetic force and the duration of its action, this material has found application in literally all objects, areas of economy and human activity. For example, in medicine it is most noticeable in MRI machines, which one inevitably encounters great amount citizens. Where is a neodymium magnet? Here is a very short list:

in amplification speakers;
in the same computer, without which almost no modern person can do today;
in the motors of children's (and not only) toys;
in car parts;
in generators;
magnetic separators;
oil filters;
in the deft hands of magicians.

Where to get a neodymium magnet

The little strongman, which today has found wide application in almost all areas of our lives, was invented by an alloy of several rare earth metals, among which the most important is neodymium. The new magnet was named after this element. Nowadays it is impossible to imagine how we lived without this invention - magnets had to be huge in size in order to have sufficient strength.

If necessary, such material can be easily found in the retail chain. Worth dialing search word, And The World Wide Web The Internet will immediately offer any quantity of products of interest wholesale and retail. The cost varies greatly and, as always, it depends on the sizes and shapes. Having set out to find out where you can get a neodymium magnet, it is useful to first decide what it is for, what it should be, and then contact suppliers.

If we're talking about about where to get a neodymium magnet at home, then look in your computer’s hard drive, in your headphones, look in the door lock of your furniture - it is omnipresent. Even the aquarium cleaning device uses this useful thing - small plates are placed in two hard sponges and wiped the aquarium glass without putting your hands in the water. These are the places where neodymium magnets are easy to remove.