Neodymium magnets are magnets made of neodymium, which is a chemical element with the symbol Nd and atomic number 60. They are very strong magnets that are commonly used in various applications such as electric motors, inverters, electronics, and other electronic devices. Neodymium magnets are also often used in liquid-cooled magnets because their strong magnetic polarization allows for effective heat dissipation. They are also commonly used in audio systems because their high magnetic performance allows for better sound.
Be careful to move the magnet(s) far enough away so that they don't jump back together and pinch your fingers.
For magnets with a diameter larger than 30mm thickness (the thickness determines the strength of the magnet), you may not be able to slide them apart, and it may be worth investing in a simple separator made of non-magnetic material such as wood or stainless steel. However, it's worth improvising by using the edge of a table, for example, as a fulcrum point to separate larger magnets, but again, be careful to separate them quickly and move them apart to prevent them from rejoining unexpectedly. The consequences of such uncontrolled joining can be not only painful if you pinch your fingers or skin, but also, due to the tremendous force of the magnets, they can crack and shards can be shot in many directions, so eye protection should be used.
Gloves will help protect your hands from being pinched by neodymium magnets, and glasses from "shots" from uncontrollably broken magnets.
Using another strong neodymium magnet: Place the magnet you want to magnetize next to a strong neodymium magnet and slide them towards each other so that the poles are adjacent.
Using electric current: Connect the magnet to electrical wires, and the flowing current induces a magnetic field in the magnet.
Using a special device for magnetic induction: These are available in electronics stores and allow you to magnetize a neodymium magnet using a strong magnetic field.
Important: The process of magnetizing a neodymium magnet can be difficult or impossible if the magnet is already demagnetized or damaged.
For more information on magnetization methods and pole directions, read the article on technology.
Choose a neodymium magnet with a high BHmax value for greater magnetic power (note that N52 is not always stronger than N38 - height matters!),
Avoid high temperatures which weaken magnetic properties, especially above the Curie temperature,
Apply an external magnetic field, for instance, by using another, stronger magnet or an electromagnet,
Creating multi-pole arrangements by combining magnets can concentrate magnetic forces in one direction, enhancing their overall power. Additionally, using a magnetic lens made of low-carbon metal, with a thickness comparable to the magnet, can further strengthen the magnet's magnetic force by up to 100%.
It's important to follow the manufacturer's recommendations and consult an expert for specialized applications.
Developed in the 1970s and 1980s, neodymium magnets generate significantly stronger magnetic fields than all other ferrite, ceramic, or Alnico magnets. The magnetic field produced by rare earth neodymium magnets can exceed (1.4) Tesla, while all other magnets normally generate fields in the range of (0.5) to (1) Tesla. Neodymium magnets are the most powerful magnets on our planet and they are also the least expensive type of rare earth magnet currently available on the market.
Zinc-coated magnets have a matte gray/blue finish and are more prone to corrosion than nickel. Zinc can leave a black residue on hands and other objects.
Epoxy or plastic coatings are also available, which are more corrosion-resistant than nickel coatings as long as the coating remains intact. Unfortunately, this coating is easily scratched during use and is considered the least reliable of the available finishes.
Finally, there is gold, which can be applied on top of the standard nickel coating. Gold-plated magnets have the same properties as nickel-plated ones but with a mirror-like golden finish (and price)!
For more information about magnets for removing anti-theft clips, visit the website anti-theft clips.
A magnetic handle is a magnet or a set of magnets with a housing attached to it, providing safety during use. The housing protects the magnet from damage and cracking, which is particularly important for brittle magnets. A magnetic handle may also have additional features such as threads, handles, or ears that facilitate its installation and use.
The biggest advantage of magnetic handles compared to magnets alone is their higher lifting capacity. Magnetic handles have a construction with a magnetic circuit made of a magnetically hard material, such as a magnet, and a magnetically soft material, such as low-carbon steel containing a significant amount of iron. The magnetic circuit increases the magnet's attractive force, enabling magnetic handles to hold heavier objects.
However, magnetic handles also have disadvantages compared to magnets alone. They have a shorter range of action because the lines of magnetic force close very flatly, resulting in much weaker magnetic induction at greater distances from the magnetic handle's surface.
In summary, a magnet and a magnetic handle differ in their construction and application. Magnets are used in various fields where magnetic properties are required, while magnetic handles are used for holding heavier objects due to increased magnet's attractive force but have a smaller range of action.
For more information about magnets, visit the website technology.
Another method is the PDR (paintless dent repair) technique, which involves manipulating the metal panel using a specialized toolkit costing around 500 PLN. This method is quite labor-intensive but allows for effective dent removal without the need for repainting.
Yet another option is to use an electric device such as the PDR 1000, which generates a magnetic field. This tool is specifically designed for removing dents on flexible steel car bodies and provides a convenient and professional solution for automotive mechanics.
For more information on magnets, visit the article on technology.
For more information about magnets, visit the website technology.
The grades of neodymium magnets that we normally sell are N38 and N42, which are measured in Tesla or Gauss Oersteds (MGOe). A Grade N38 magnet has a maximum energy product of 38 Gauss-y MGOe, while N48 will be stronger. Generally, the higher the grade number, the stronger the neodymium magnet. More information can be found in the technology section.
For more information about types of magnetic materials, please visit the technology page.
For more information, read the article on dangerous magnets.
Remanence (Br) is the measure of the maximum magnetic induction remaining in the magnet after the magnetic field is removed. For neodymium magnets, the typical Br value ranges from 1.1 to 1.4 T.
Coercivity (Hc) is the magnetic field strength required to demagnetize the remanent magnetization. The Hc value for neodymium magnets typically ranges from 800 to 2000 kA/m.
Maximum energy product (BHmax) is the product of remanence and coercivity, giving the measure of the maximum energy the magnet can deliver per unit volume. For neodymium magnets, the BHmax value typically ranges from 200 to 400 kJ/m3.
Another important technical parameter of neodymium magnets is their polarity. Neodymium magnets have two poles - the north (N) and south (S) poles - which can be identified using a compass or teslameter.
Specialized measurement devices such as gaussmeters, teslameters, or magnetometers can be used to measure the remanence, coercivity, maximum energy product, and polarity of neodymium magnets.
Manufacturers of neodymium magnets often provide values of these technical parameters in product specifications, which facilitates the selection of the right magnet for a specific application.
For more information about types of magnetic materials, please visit the technology page or use the calculator in the Applications tab.
For more information about magnets and their properties, visit the website technology.
The most commonly used material for magnetic field shielding is iron, which has very high magnetic permeability. Other materials such as stainless steel, cobalt, nickel, and copper can also be used for magnetic field shielding, but their effectiveness is usually lower compared to iron.
Shielding involves placing a material with high magnetic permeability between the source of the magnetic field and the area we want to protect. This material forms a Faraday cage, which attracts the lines of magnetic force and reduces their impact on the protected area.
In summary, there are no materials that can completely block a magnetic field, but iron and other materials with high magnetic permeability can be used for magnetic field shielding to reduce its influence on a specific area.
Ferromagnetic materials, including iron, also have magnetic domains in their structure, but the direction of their magnetic poles is random. However, when exposed to an external magnetic field, such as from a magnet, the individual domains in iron begin to align and orient their magnetic poles according to the direction of the external magnetic field.
Because a magnet has a strong magnetic field, it can attract iron and other ferromagnetic metals by causing their magnetic domains to align and point towards the magnet. This process is why magnets are widely used in various fields such as the automotive industry, electronics, and even medicine.
Magnetic domains are small regions within ferromagnetic materials where the magnetic fields are aligned in one direction. Each domain has its own orientation and magnetic strength. When a magnet is brought close to iron, the magnetic fields of the magnet are arranged in a way that strengthens the magnetic fields of selected domains, causing the remaining domains to align in the same direction. This is why iron attracts magnets.
Advantages of neodymium magnet:
highest energy density compared to mass,
very slow power loss (1% per 10 years),
low production cost.
Neodymium magnets became a significant breakthrough in magnetic technology due to their unique properties, such as high magnetic strength and relatively low mass compared to traditional magnets. Thanks to this invention, neodymium magnets found wide applications in various fields, including electronics, automotive, medicine, and many others.
Neodymium magnets larger than a few centimeters are powerful enough to cause injury by pinching body parts between two magnets or a magnet and a metal surface, even resulting in bone fractures.
Magnets that are too close to each other can suddenly snap together with tremendous force, shattering the fragile nickel coating, and flying magnet shards can also cause injuries. Therefore, eye protection is necessary when working with these magnets.
There have even been cases where children who swallowed multiple magnets had intestinal folds that pinched between the magnets, causing injury, and in one case, even death.
using clay: Use clay, shape the magnet, and then 'bake' it in the oven for about 20 minutes at a temperature of 100-140 degrees Celsius.
using magnetic sheets: Decorate one side of the sheet, color it, and then cut out in the chosen shapes.
using small objects: Glue small objects to the flat side of a magnet using adhesive.
using photos: Gather self-adhesive magnetic paper, photographic paper, scissors, and glue. Edit, cut out, and attach the photos to the magnet.
In addition, the heat generated during processing can demagnetize the magnets and can cause a fire, posing a safety hazard. The dry powder produced during machining is also highly dangerous and flammable, creating another significant safety and health risk.
Therefore, any work related to machining neodymium magnets should only be performed by experienced engineers using appropriate equipment and taking necessary precautions. It is recommended to use protective gloves, goggles, and clothing to prevent accidental contact with the magnet or inhalation of harmful substances, which can result in serious injuries.
Firstly, neodymium magnets can be divided into two types: based on their construction and based on the method of attaching the rope. When it comes to attachment, top-mounted magnets are suitable for fishing from bridges, piers, or for checking wells. They are also perfect for fishing from boats.
Models like the DHIT Magnet GOLD are available in five strengths ranging from 120 kg to 600 kg. On the other hand, magnets with dual mounting, such as the DHIT Magnet GOLD, are the most versatile and allow fishing from both the top and the side (two handles can be connected with screws on the sides and used in pairs for searching and catching).
When it comes to popularity, the most frequently chosen models are: F200x2 GOLD, F300x2 GOLD, and F400x2 GOLD. If you have any doubts about choosing the right magnet, we encourage you to contact us. We are happy to provide advice and help you choose the model that best suits your expectations and goals.
For more information about magnets for water treasure hunting, visit the website which magnet for treasure hunting? or the category of magnets for treasure hunting.
There is a theoretical possibility of using a magnet instead of a magnetic separator, but it would be an ineffective solution. In certain industries such as the food industry, the use of a magnetic field to clean processed food is mandatory. In such cases, the ineffectiveness of a magnet would result in penalties if detected by auditors and inspectors. Additionally, magnets can flake off during friction, which would contaminate rather than clean the substances...
In conclusion, although there is a theoretical possibility of replacing a magnetic separator with a magnet, such a substitution is ineffective (the magnet alone without a magnetic circuit would be weak) and does not meet the required standards (poor separation). A magnetic separator is a sophisticated device that is customized to specific requirements and operating conditions.
For more information about magnetic separators, please visit the magnetic separator page.
Below are the density values for various magnetic materials, including neodymium magnets:
Water: 1.0 (reference value)
Ferrite magnet (sintered): approximately 4.8
Neodymium magnet (sintered): approximately 7.5
Alnico magnet (cast): approximately 7.3
It is worth noting that neodymium magnets are known for their high density, which means they are relatively heavier than other magnetic materials of similar size. This characteristic makes neodymium magnets highly useful in many applications, such as electric motors, speakers, generators, as well as in the automotive and medical industries.
If you are looking for high-density neodymium magnets, you are in the right place. We offer a wide selection of neodymium magnets in various shapes and sizes that will meet your technical requirements.
While neodymium magnets have shown to maintain their effectiveness up to 80°C or 175°F or (176°F or 80°C; this temperature can vary depending on the grade, shape, and application of the magnet. If the magnet heats above its maximum operating temperature (for standard N grades), the magnet will permanently lose a fraction of its magnetic strength. If heated above the Curie temperature (590°F or 310°C for standard N), they will lose all their magnetic properties.
Corrosion can cause nickel to flake off from uncoated magnets or degrade them into powder. Protective coatings such as gold, nickel, zinc, and epoxy resin provide anti-corrosion protection—although nickel is the most durable, practical, economical, and reliable.
Our magnets, which are finished with a triple-layer nickel-copper-nickel coating, provide sufficient protection in most applications. Keep in mind that neodymium magnets are not waterproof. In the presence of moisture, they will rust or corrode. If used underwater, outdoors, or in a humid environment, they will also lose magnetic strength due to corrosion.
But most importantly, wait and avoid panicking and running to doctors. For more information, read the article on dangerous magnets.
Multipolar magnetization is used for isotropic magnets, which means they were formed without the involvement of a magnetic field. They can have multiple pairs of magnetic poles, which is particularly useful in applications such as revolution counting. Anisotropic magnets, which were formed in a strong magnetic field, can also be magnetized multipolarly, but only in accordance with the magnetization direction determined during magnet formation.
In general, every magnet must have an even number of poles for its operation to be effective.
The next step is the application of a protective coating (such as plastic, gold, or triple-layer coating of nickel, copper, and nickel alloy) if required. Finally, the "blank magnets" are magnetized by subjecting them to a very strong magnetic field above 30 KOe. This process allows them to continuously produce a strong magnetic field.
Method 2: Another way is to use a compass. When a magnet is brought close to a compass (50 cm), the magnetic needle labeled N (north) deviates towards the magnet, indicating its S (south) pole.
Method 3: If you have a monitor or TV nearby, bring the magnet close to the screen (50 cm) briefly to avoid permanently magnetizing the cathode ray tube. The N (north) pole causes a blue discoloration, while a green discoloration indicates the S (south) pole.
For more information about N and S poles, read the article on enes magnets.
Another method is to use scissors to cut the clip. However, caution must be exercised to avoid damaging the garment during this operation.
If the clip is attached to the garment with adhesive tape, you can try gently peeling it off using a cotton swab, for example.
Yet another way to remove an anti-theft clip from clothing is to use a lighter. Heat up the round plastic part of the clip, which will cause the mechanism to lose its grip and fall off. To make the task easier, you can use scissors or pliers to hold the clip while heating it. However, it is important to note that this method can damage the garment and carries some risks, so it is advisable to be cautious, wear gloves, or contact the store's staff.
It is important to remember that some anti-theft measures are more difficult to remove than others and may damage the garment. In such cases, it is best to contact the store's staff.
For more information about magnets for removing anti-theft clips, visit the website anti-theft clips or watch on YouTube.
The simplest way is to use another magnet that has already been marked. The north pole of the marked magnet will be attracted to the unmarked magnet's south pole.
If you take an even number of magnets and thread a string through the middle of the stack, suspend the magnets so that they can freely rotate on the string, the north pole will point north ;).
Although this contradicts the "opposites attract" law of magnetism, the poles were originally called "North Seeking" and "South Seeking." These names were eventually shortened over time to "North" and "South," which are now commonly known.
If you have a compass, the needle end that normally points north will be attracted to the south pole of a neodymium magnet.
Learn more about magnetic poles on the enes magnets page.
Nickel is the most commonly used coating because it is durable and cost-effective. Our magnets are coated with a triple nickel-copper-nickel coating. This results in a shiny silver finish and provides reliable corrosion resistance in most applications. It is important to know that no neodymium magnet, even with a plastic or gold coating, is completely waterproof.
If the height of such a magnet equals its diameter, it will be the optimal dimension of the magnet. However, if the height of the magnet exceeds its diameter, there will no longer be a significant increase in magnetic induction on the magnet's surface, and the increase will be very small.
In conclusion, combining two magnets does not double their magnetic attraction, but two joined magnets will work the same as one larger magnet of similar dimensions.
For more information about magnets, visit the website technology.
The UMP 67x28 [M8+M10] F120 GOLD magnet with rope has a double-sided grip with a holding capacity of about 120 kg and the F120 GOLD N38 marking, which is suitable for children - for adults, a stronger magnet is recommended.
The UMP 75x25 [M10x3] GW F200 GOLD magnet with rope has a double-sided grip with a holding capacity of about 290 kg and the F200 GOLD N42 marking, which is an optimal compromise between strength and price.
The UMP 94x28 [M10] GW F300 GOLD magnet with rope has a double-sided grip with a holding capacity of about 330 kg and is an ideal choice between power and price.
Models F400 GOLD or F600 GOLD are the strongest magnets with handles, suitable for professional shore or bridge searches, but they are not recommended for retrieving buoyant smartphones like Samsung or iPhone.
For more information, read the article on which magnet for searching?.
Ferrite and samarium-cobalt magnets - can operate in temperatures ranging from -60°C to 250°C.
Neodymium magnets - depending on the type, can operate in temperatures ranging from -130°C to 80-230°C.
Alnico magnets - are the most temperature-resistant and can operate in temperatures up to 550°C.
All magnets tolerate low temperatures well, but the upper limit of the operating range is more critical. It should be noted that magnets can lose their magnetic properties due to overheating, which can lead to a loss of their attracting power or even complete demagnetization.
In summary, magnets have different temperature operating ranges, and their magnetic properties may deteriorate due to overheating. It is important to consider these parameters to ensure proper and safe magnet operation in a given application.
These types of magnetic rollers are commonly used as filtering elements in heating systems, heat pumps, refrigerators, and other industrial devices that require the removal of contaminants from fluids, such as ferromagnetic metals, before entering the system.
Please contact us for information on the possibility of creating a one-way magnetic roller suitable for your applications.
For more information about magnetic separators, please visit the magnetic separator page.
In the United States, magnet fishing is generally permitted, except in South Carolina where it's illegal due to laws prohibiting the removal of artifacts from state waters.
In Indiana, from 2024, a permit is required for magnet fishing.
In other states, such as Alabama, magnet fishing is legal but requires obtaining permission on private properties.
In the UK and the US, there are specific regulations that can complicate magnet fishing, especially regarding the discovery and removal of historical artifacts.
For more information about magnets and their designations, visit the website technology.
Initially, the high cost of these magnets limited their use to applications that required tremendous force and high field strength. Both the raw materials and patent licenses were expensive. However, in recent decades, neodymium magnets have become less costly, and the low cost has inspired new applications, such as magnetic building toys. XMAG2, as well as numerous other industrial applications.
For more information on the uses of neodymium magnets, visit the uses of neodymium magnets section.
Use a smartphone app: there are apps available that can help identify magnet poles.
Use a teslameter: a teslameter will not only measure the induction value but also indicate which pole is which.
Acquire a magnetic pole detector: for those who prefer convenience and practicality, it is possible to acquire a Magnetic Pole Detector, which is available in the Measurement Devices section.
For more information about magnetic directions, please visit the N and S magnets page.