FAQ - magnet, neodymium magnets, magnetism
What is a neo magnet?
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.
Neodymium magnets are widely used in various fields such as electronics, automotive industry, medicine, agriculture, and more. They can be found in speakers, electric motors, magnets used in medical treatments, and even in magnets used in agriculture to give commands to agricultural machinery.
Neodymium magnets are a type of permanent magnets that are very strong and exceptionally durable. They are made of neodymium, one of the elements in the rare earth metals group, along with iron and boron.
Neodymium magnets are so strong because neodymium has a high magnetic field and is highly durable. When combined with iron and boron, they create magnets with very high magnetic strength.
Yes, neodymium magnets are safe for health if used properly. However, it is important to note that some neodymium magnets are very strong and can be dangerous if swallowed or if they come into improper contact with the body.
Magnets should be removed from a refrigerator if they cause destruction to its door. Additionally, very powerful magnets may potentially negatively affect the electronic circuits in the appliance. Occasionally it's advised to take them off to avoid permanent destruction, particularly if they are moved across the surface carelessly.
Magnetic fields cannot be blocked; they can only be redirected. The only materials that redirect magnetic fields are ferromagnetic materials (attracted to magnets) such as iron, steel (containing iron), cobalt, and nickel. The degree of redirection is proportional to the permeability of the material.
A magnet attracts iron due to the magnetic properties of both materials. A magnet is made of a magnetic material that possesses magnetized magnetic domains with a defined direction of magnetic poles. These domains are ordered and aligned in one direction, creating a strong magnetic field.
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.
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.
Anisotropic magnets are formed in the presence of a magnetic field, which aligns the material being formed along the lines of magnetic force. After the magnetization process, the magnet is magnetized only along the magnetic axis, making it very strong. Only the poles can be reversed. Isotropic magnets, on the other hand, do not require an external magnetic field during formation. They are magnetized only once, at the end of the production process, which makes them weaker than anisotropic magnets. However, isotropic magnets can be magnetized in any direction, allowing for multipolar magnetization.
For more information about types of magnetic materials, please visit the technology page.
For more information about types of magnetic materials, please visit the technology page.
A magnet and a magnetic handle are related but differ in their construction and application. A magnet is an element made of a magnetic material that possesses magnetic properties, such as attracting ferromagnetic metals like steel, iron, cobalt, and nickel. Magnets are used in various fields, including electronics, medicine, the automotive industry, and many others.
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.
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.
Neodymium magnets, also known as neodymium-iron-boron magnets, were invented in the 1980s by a team of scientists from Japan. The team included Shunichi Miyazawa, Kiyoshi Watanabe, and Jiro Fujita. This discovery took place in 1984 at the Institute for Rare Earths Research in Japan.
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 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.
using magnetic foil: You need magnetic foil available online, scissors, photos, adhesive tape or double-sided tape.
with 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.
with magnetic sheets: Decorate one side of the sheet, color it, and then cut out in the chosen shapes.
with small objects: Glue small objects to the flat side of a magnet using adhesive.
with photos: Gather self-adhesive magnetic paper, photographic paper, scissors, and glue. Edit, cut out, and attach the photos to the magnet.
with 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.
with magnetic sheets: Decorate one side of the sheet, color it, and then cut out in the chosen shapes.
with small objects: Glue small objects to the flat side of a magnet using adhesive.
with photos: Gather self-adhesive magnetic paper, photographic paper, scissors, and glue. Edit, cut out, and attach the photos to the magnet.
Yes, every magnet has a minimum of two poles, which means at least one pair of magnetic poles. Nowadays, magnets are also magnetized multipolarly, meaning they have multiple pairs of poles. The technical designations for such magnets are, for example, 2-pole (one pair of poles), 4-pole (two pairs of poles), 6-pole (three pairs of poles), etc.
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.
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.
A permanent magnet, or hard magnet, is a term used for objects made of a material that exhibits a wide magnetic hysteresis loop. This means that after applying a sufficient magnetic field to magnetize it, the atomic regions called magnetic domains will become aligned, and these ordered structures will not change after removing the field. This makes the material permanently magnetic, and its specific structure enables this. Characteristic features of a permanent magnet include the coercive force HcJ, which should be at least 24 kA/m. The greater the coercive force value, the higher the magnet's resistance to demagnetization by an opposing magnetic field, as in the case of motors and other electrical machinery and devices, as well as resistance to thermal demagnetization, which can occur at high or very high temperatures.
For more information about magnets, visit the website technology.
For more information about magnets, visit the website technology.
Magnets repel when their like poles are facing towards each other. This phenomenon arises from electromagnetic principles. When the north pole of one magnet faces the northern pole of another (or southern towards south), they repulse. This is a basic principle in electromagnetism.
Use a compass: the simplest way is to use a compass. Be careful not to bring the compass needle too close to the magnet to avoid damaging the compass. The compass arrow indicating north actually points to the physical 'S' pole of the magnet.
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.
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.
Ferromagnetic materials are strongly attracted to neodymium magnets. Iron (Fe), nickel (Ni), and cobalt (Co) elements are the most commonly available and attracted elements. Steel is also highly susceptible and attracts magnets as it is ferromagnetic as an alloy of iron and other metals. Materials that are not attracted include stainless steel (holds the magnet very weakly) such as stainless steel 304 and stainless steel 316L, also known as dental steel.
Yes. Two or more neodymium magnets stacked together will exhibit the same strength as a single magnet of combined sizes. For example, if two 5mm magnets were used to build a 10mm magnet, the two magnets will have the same strength and behave identically to a 10mm magnet even though it is a construction of two 5mm magnets.
Neodymium magnets are used in many applications that require strong, compact permanent magnets, such as electric motors for power tools, hard drives, magnetic mounting or fastening systems, and jewelry clasps.
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.
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.
The main difference between a magnet and magnesium is that a magnet is an object capable of attracting certain metals, used for example in fridge magnets, while magnesium is a light, silvery-white metal, used in various industrial and biological applications. A magnet has magnetic properties, whereas magnesium is a chemical metal with the symbol Mg.
The majority of foreign bodies (80-90%) swallowed by children pass through the digestive tract without complications and are usually expelled within 4-6 days of ingestion. If a child swallows only one magnet or coin, you can simply give them bread - encourage them to eat and drink plenty of fluids and wait for the object to pass through the digestive system. However, if a child swallows two magnets, especially if they are not connected, there may be a problem as they can attract each other in the digestive system. In this case, it is important to contact a doctor and get an X-ray to assess the situation and locate the magnets.
But most importantly, wait and avoid panicking and running to doctors. For more information, read the article on dangerous magnets.
But most importantly, wait and avoid panicking and running to doctors. For more information, read the article on dangerous magnets.
Mechanical engineers, physicists, and other scientists consider neodymium magnets to be the strongest permanent magnets in the world because they produce the highest magnetic field in relation to their size and volume compared to other known natural or artificial materials.
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.
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.
A magnet attracts iron because iron is a material with ferromagnetic properties. Its atomic makeup allows for easy attraction with the magnetic field of a magnet.
Other coating variations include black nickel with a gunmetal or carbon-like color. Black nickel triple-layer plating is achieved by adding a black dye to the final nickel plating process, giving it a still glossy appearance similar to a nickel-plated magnet.
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)!
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)!
Neodymium magnets are among the strongest permanent magnets available on the market. There are three basic technical parameters that determine their magnetic properties: remanence (Br), coercivity (Hc), and maximum energy product (BHmax).
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.
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.
A neodymium magnet whether N38 or N50, N52 - capable of lifting 500 kg vertically can be moved horizontally, like a sled, with a force of just under 100 kg. This is the effect of diminished slip force, dependent on the friction coefficient of the surface, such as the bottom of a river or a floor.
To remove dents from car body panels, there are several methods. One of them is using a magnet in combination with a large metal ball placed on the opposite side of the panel. This allows for the panel to be pushed out, but this method may only be effective if the panel thickness is above 0.6 mm.
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.
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.
Neodymium magnet is not the same as a dietary supplement called MAGNEZ (MAGNESIUM) - it belongs to the type of rare earth elements, as neodymium is a rare earth element in the periodic table SI and is currently the strongest permanent magnets available on the market. Magnet made of neodymium is composed of a mixture of neodymium, iron, and boron with the structure of Nd2Fe14B. Currently, it is the most powerful magnet available on the market.
Its advantages:
highest energy density compared to mass,
very slow power loss (1% per 10 years),
low production cost.
Its advantages:
highest energy density compared to mass,
very slow power loss (1% per 10 years),
low production cost.
Yes. Although they have the highest magnetic field strength and higher brittleness (making them magnetically stable), neodymium magnets have a lower Curie temperature and are more heat-sensitive and susceptible to oxidation compared to samarium-cobalt magnets.
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.
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.
Neodymium magnets can be ground, cut, and drilled, but it requires the right equipment and tools. Diamond blades and tools working with intensive water cooling are typically used for machining ferrite magnets. Neodymium magnets are cut using wire electrical discharge machining (EDM).
Magnets can damage a refrigerator by scuffing its surface. Regular moving of magnets can lead to surface damage.
Method 1: One of the better methods is to compare it with a reference magnet. We know that opposite poles attract, N-S and S-N. Usually, magnets have color-coded markings: N (north) pole is indicated by blue color, and S (south) pole is indicated by red color.
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.
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.
If you are looking for a strong magnet with a handle, there are several options to choose from.
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?.
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?.
Manufacturers of neodymium magnets use letters and numbers in the name of the magnetic material. Letters such as M, H, SH, UH, EH, and numbers such as 35, 38, 42, 45... indicate the magnetic energy density (BH)max of the magnet in CGS units, such as 35, 38, 42, 45... MGsOe (mega-gauss-oersteds). The letter designations refer to the coercivity value, which is the magnet's resistance to demagnetization due to high temperature or the influence of an opposing magnetic field. These letters can be deciphered as follows: M - "medium," H - "high," SH - "super high," UH - "ultra high," EH - "extra high." For example, the magnet N38SH indicates that it is a neodymium magnet with a magnetic energy density of 38 MGsOe and a very high coercivity value (SH stands for "super high").
For more information about magnets and their designations, visit the website technology.
For more information about magnets and their designations, visit the website technology.
In Poland, magnet fishing is legal as there are no specific regulations prohibiting it... The legality of magnet fishing in 2024 in other countries depends on local laws:
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.
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.
The density of neodymium magnets is an important technical parameter of this magnetic material. Density, also known as specific weight, determines the mass of the magnet relative to its volume. The higher the density, the heavier the neodymium magnet.
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
Iron: 7.9
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.
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
Iron: 7.9
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.
There are several different methods to identify the north and south poles of our neodymium magnets.
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.
Another method?
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.
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.
Another method?
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.
For mounting license plates, it is recommended to use two magnets MPL 40x18x10 / N38 - neodymium magnet under the bumper and two magnets MPL 40x20x5 / N38 - neodymium magnet under the license plate. It is important to attach a thin metal sheet under the plate to cover the magnets and protect them from detaching due to heat and vibration. As license plates are made of aluminum and are not magnetic, the metal sheet will assist in keeping the magnets in place. Additionally, rivets on the plate can create the illusion that the plate is permanently attached, enhancing protection against theft.
Technical designations of magnetic separators are expressed in Gauss (G) or Tesla (T) and indicate the intensity of the magnetic field. A magnetic separator is a complex device consisting of multiple magnets that work in magnetic circuits. These circuits increase the field intensity in areas where it is required. Magnetic separators are dimensionally and magnetically tailored to the environment in which they are intended to operate. They often have systems to facilitate cleaning and mounting elements.
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.
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.
No, combining two identical magnets does not double their magnetic attraction; in fact, it will be weaker. Two joined magnets will behave the same as a larger magnet of similar dimensions, and the gap between the magnets, resulting from galvanic coatings, is usually negligible in most applications.
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.
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.
No, soldering or welding neodymium magnets is not allowed. The generated heat will demagnetize the magnet and may cause a fire. Additionally, burning magnets release toxic substances, which can lead to poisoning.
Very little. If properly stored (room temperature, low humidity) and not overheated or physically damaged, our neodymium magnets lose less than 1% of their strength over 10 years. This cannot be noticed without very sensitive measuring equipment. Additionally, the neodymium magnets we offer do not lose strength even if held with the same poles or opposite poles in so-called repulsion or attraction by other magnets for an extended period.
There are no materials that can completely block a magnetic field. However, there are materials that can significantly reduce the magnetic field in a specific area, known as magnetic shields.
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.
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.
Magnets attract each other when oppositely directed poles are oriented towards each other. The mutual attraction of magnets arises from the principles of electromagnetism, where the north pole of one magnet attracts the south pole of another, and vice versa. This principle is the basis for the operation of numerous applications that use magnetism.
Yes, magnets can have a negative impact on mobile phones as they can interfere with the built-in compass and GPS position reader inside the phone, which can lead to navigation and orientation problems. They can also affect the operation of other phone components, such as the touch screen or Hall sensors, which can cause issues with the phone's functionality. Therefore, it is important to avoid storing the phone near strong magnets and avoid carrying magnets in pockets with the phone.
For more information, read the article on dangerous magnets.
For more information, read the article on dangerous magnets.
Magnets on the fridge are sometimes seen as dangerous due to the risk of damaging the surface of the refrigerator, especially when regularly moved. Additionally, very strong magnets may potentially affect the electronics in some refrigerators.
If you are planning treasure hunting using neodymium magnets, there are a few important things to consider when choosing the right model.
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.
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.
Our neodymium magnets, also known as NdFeB magnets, are composed of a compound of neodymium, iron, and boron, known as Nd2Fe14B. This compound is actually a powdered mixture, which is then poured and pressed (applying extreme pressure) into specially cast forms, and then sintered (heated in a vacuum), cooled, then ground or cut into the desired shape.
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.
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.
A magnet attracts metal because some metals, like steel, have characteristics attracting magnets. When a magnet comes close to a steel surface, magnetic forces are created, which connect the magnet to the metal.
Magnets can be harmful to refrigerators if they scratch its coating. Constant moving of magnets might cause scuffing. However, normal application of magnets seldom leads to major damage.
To magnetize a neodymium magnet, the process of "magnetic induction" must be carried out. There are several ways to do this:
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.
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.
Generally, no. Neodymium magnets are very hard but also brittle, making machining very difficult and sometimes impossible. The nickel-copper-nickel coating hardness that protects the magnet is rated RC46 as "C," which means the magnets are harder than commercially available drills and tools. Standard machining tools are unable to handle neodymium magnets and typically get destroyed.
No, General Motors does not use neodymium magnets.
Neodymium magnets are composed of neodymium, iron, and boron, and their PKWiU number is: 20.13.65.0. Regarding the CN code: 85051100.
Placing magnets on a refrigerator is not recommended as they can ruin its finish. Moreover, heavy magnets can distort the thin metal surfaces of refrigerators.
Gaussmeters, also known as Gauss meters, are used to calculate the magnetic field density on the surface of a magnet, while density or attraction of the magnetic field is measured in units of Gauss or Tesla. Pull force tests, which measure the pressure forces in pounds or kilograms, can also be used to test the holding strength of a magnet that comes into contact with a flat steel surface. More information can be found in the technology section or magnetic calculator.
Yes, but they require the right equipment and experience. Processing neodymium magnets can only be done by experienced engineers who have specialized tools. Any mechanical processing work should be done before magnetization. Otherwise, the resulting particles and filings, being tiny magnets, can contaminate not only the magnet but also the devices used for processing, potentially damaging the machine.
Materials commonly used for making fridge magnets include: magnetic foil, which can be easily cut and decorated. Other popular materials are epoxy resins for durable and aesthetic finishes, modeling clay for handmade magnets, and photographic paper for creating photo magnets. Various types of industrial glues are also often used to attach decorative elements.
No, a single magnet cannot effectively substitute a advanced magnetic separator. Although theoretically it is possible, in reality the application of a single magnet instead of a complex magnetic separator will prove to be inefficient. Magnetic separators are complex devices that are customized to specific requirements and working conditions, and are often equipped with cleaning mechanisms and mounting elements. In certain industries, where there are strict regulations for cleaning products using a magnetic field, the use of a single magnet instead of a separator will not be sufficient, but can also lead to penalties during inspections by auditors.
A neodymium magnet is not capable of attracting pure gold (Au), aluminum (Al), or copper (Cu). Interestingly, these metals will repel from a strong alternating magnetic field due to the phenomenon of eddy currents. Of course, a neodymium magnet does not attract plastics, glass, or wood. It primarily attracts elements such as iron (Fe) and its alloys, as well as gadolinium (Gd), nickel (Ni), erbium (Er), cobalt (Co), and dysprosium (Dy).
For more information about magnets and their properties, visit the website technology.
For more information about magnets and their properties, visit the website technology.
Neodymium magnets are used in various fields, including electronics, automotive, medicine, and many others.
The lifespan of neodymium magnets depends on various factors, but they can maintain their magnetic properties for many years with proper usage.
The risks associated with machining neodymium magnets are quite serious. During mechanical processing, the resulting filings and particles, being tiny magnets, can contaminate not only the magnets but also the devices used for processing, potentially damaging the machine. Additionally, permanent magnets, including neodymium magnets, are made of hard and brittle materials, which make their mechanical processing challenging. Cracks, chipping, or damage to the magnets can occur during processing, affecting their magnetic properties.
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.
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.
We use the description "magnetization through thickness" to identify the pole locations on some of our plate magnets. This means that the magnets attract or repel on the largest surface. In other words, the last dimension is the direction of magnetization.
Magnets can destroy a refrigerator if their sliding leads to damages on the finish of the refrigerator. Moreover, ultra-strong magnets can affect the electronic control systems in some modern refrigerators.
A magnet typically does not attract aluminum as aluminum does not belong to ferromagnetic materials. However, under certain conditions, such as in the presence of powerful magnetic fields, aluminum can exhibit minimal reactions.
Neodymium magnets are composed of neodymium, iron, and boron, and their customs number is: 8505199089.
The RM®#6 magnet by DHIT is one example of a magnet for anti-theft clips, characterized by a maximum power of 13,000 GS. With its unique cylindrical shape and a recess in the central part, the magnet works on clips doubly, allowing for the removal of various types of security measures with different shapes. It is easy to use and intuitive, and its installation on the cash register counter is simple. This safe and modern solution is recommended for stores such as outlets or second-hand clothing stores. It is ideal for sellers who value speed and effectiveness.
For more information about magnets for removing anti-theft clips, visit the website anti-theft clips.
For more information about magnets for removing anti-theft clips, visit the website anti-theft clips.
Magnets differ in their resistance to ambient temperature. Below are the temperature operating ranges for different types of magnets:
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.
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.
It is not using neodymium magnets.
To remove clips from clothes, you can use a magnet for anti-theft clips, such as the Ultra Magnet. Simply place the magnet on the clip and move it until the security measure is removed.
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.
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.
No, both poles of the magnet have the same strength.
Magnets stick to refrigerators because a large portion of refrigerators have metal surfaces. Metal surfaces of the fridge act as surfaces attracting magnets, allowing magnets to stay put.
Yes, it is possible to create a one-way magnetic roller that can be used as a magnetic filter in a heat pump. Such magnetic rollers are made of neodymium magnets placed in a steel tube, and their construction allows fluid to flow through the tube in only one direction, enabling them to be used as one-way magnetic filters.
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.
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.
Move them across a hard and thick surface like a table or stairs. Most stacks of magnets with a diameter up to 30mm thickness can be slid apart by hand. Just grip or slide your fingernails between the magnets at the point where you want to separate them and slide them off the stack.
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.
Remember!
Gloves will help protect your hands from being pinched by neodymium magnets, and glasses from "shots" from uncontrollably broken magnets.
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.
Remember!
Gloves will help protect your hands from being pinched by neodymium magnets, and glasses from "shots" from uncontrollably broken magnets.
Magnets stick to the fridge because the refrigerator's door is usually made of metal, which is attractive to magnets. Typical refrigerators have metal doors on the exterior, which enable magnets to adhere.
Neodymium magnets are primarily composed of neodymium, iron, and boron. If they are not coated-protected, the iron in the material will oxidize very quickly, especially when exposed to moisture. Even normal humidity can cause iron to rust. Therefore, to maintain and protect the long-lasting magnetic performance of each neodymium magnet, most neodymium magnets are coated with a protective layer.
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. Important to note that no neodymium magnet, even with a plastic or gold coating, is completely waterproof.
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. Important to note that no neodymium magnet, even with a plastic or gold coating, is completely waterproof.
Neodymium magnets are surprisingly strong, much more powerful than most other magnets you have encountered. As a result, the greater force exerted by neodymium magnets poses dangers that are not present with other types of magnets. This is demonstrated in the following video from YouTube.
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.
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.
Magnets may not stick to a refrigerator when its surface becomes non-magnetic. This can be due to painting the refrigerator surface with a non-magnetic substance.
The magnet grade or "N rating" represents the maximum energy product of the material from which the magnet is made and refers to the maximum force the magnet material can generate.
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.
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.
A magnet attracts iron because iron is one of the few metals that is ferromagnetic. Ferromagnetic materials have their own internal magnetic force, which is oriented in one direction. 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 the iron. This creates a force that attracts these two materials.
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.
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.
To increase a magnet's strength, you should:
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.
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.
The temperature range for neodymium magnets varies depending on the type, but it can be from -130°C to 80-230°C.