MW 21.9x10 / N38 - cylindrical magnet
cylindrical magnet
Catalog no 010045
GTIN: 5906301810445
Diameter Ø [±0,1 mm]
21.9 mm
Height [±0,1 mm]
10 mm
Weight
28.25 g
Magnetization Direction
→ diametrical
Load capacity
12.11 kg / 118.76 N
Magnetic Induction
417.89 mT
Coating
[NiCuNi] nickel
15.50 ZŁ with VAT / pcs + price for transport
12.60 ZŁ net + 23% VAT / pcs
bulk discounts:
Need more?Want to negotiate?
Call us now
+48 22 499 98 98
or contact us via
request form
our website.
Specifications as well as appearance of a magnet can be tested on our
force calculator.
Order by 14:00 and we’ll ship today!
MW 21.9x10 / N38 - cylindrical magnet
Magnetic properties of material N38
Physical properties of NdFeB
Shopping tips
Moreover, even though neodymium is part of the strongest magnets, they are prone to corrosion in humid environments. Therefore, they are coated with a coating of nickel to increase their durability. Interestingly that NdFeB neodymium magnets are about 13% lighter than SmCo magnets and, despite their power, are brittle, which requires care during their handling. Therefore, any mechanical processing should be done before they are magnetized.
In terms of safety, there are several recommendations regarding the use of these magnets. It is advisable to avoid their use in acidic, basic, organic environments or where solvents are present, as well as in water or oil. Additionally, they can damage data on magnetic cards and hard drives, although data deletion using a neodymium magnet is not guaranteed.
In terms of properties in different environments, neodymium magnets are sensitive to corrosion, especially in humid conditions. Therefore, they are often covered with coatings, such as nickel, to protect them from environmental factors and prolong their durability. Temperatures exceeding 130°C can result in a reduction of their magnetic strength, although there are specific types of neodymium magnets that can withstand temperatures up to 230°C.
As for potential dangers, it is important to avoid using neodymium magnets in acidic environments, basic conditions, organic or solvent environments, unless they are properly protected. Additionally, their use is not recommended in water, oil, or in an atmosphere containing hydrogen, as they may forfeit their magnetic properties.
Advantages as well as disadvantages of neodymium magnets NdFeB.
Apart from their superior magnetic energy, neodymium magnets have these key benefits:
- They do not lose their even during around ten years – the reduction of power is only ~1% (according to tests),
- They protect against demagnetization induced by external magnetic influence remarkably well,
- The use of a mirror-like nickel surface provides a refined finish,
- They exhibit extremely high levels of magnetic induction near the outer area of the magnet,
- Thanks to their exceptional temperature resistance, they can operate (depending on the form) even at temperatures up to 230°C or more,
- With the option for customized forming and targeted design, these magnets can be produced in multiple shapes and sizes, greatly improving engineering flexibility,
- Important function in cutting-edge sectors – they are used in hard drives, electromechanical systems, medical equipment along with technologically developed systems,
- Relatively small size with high magnetic force – neodymium magnets offer intense magnetic field in tiny dimensions, which makes them ideal in small systems
Disadvantages of NdFeB magnets:
- They are prone to breaking when subjected to a powerful impact. If the magnets are exposed to physical collisions, we recommend in a steel housing. The steel housing, in the form of a holder, protects the magnet from cracks and additionally increases its overall durability,
- Magnets lose field strength when exposed to temperatures exceeding 80°C. In most cases, this leads to irreversible power drop (influenced by the magnet’s structure). To address this, we provide [AH] models with superior thermal resistance, able to operate even at 230°C or more,
- They rust in a moist environment. For outdoor use, we recommend using sealed magnets, such as those made of rubber,
- The use of a protective casing or external holder is recommended, since machining fine details in neodymium magnets is difficult,
- Health risk due to small fragments may arise, when consumed by mistake, which is important in the health of young users. Moreover, small elements from these devices can interfere with diagnostics once in the system,
- High unit cost – neodymium magnets are costlier than other types of magnets (e.g., ferrite), which can restrict large-scale applications
Safety Guidelines with Neodymium Magnets
People with pacemakers are advised to avoid neodymium magnets.
In the case of neodymium magnets, there is a strong magnetic field. As a result, it interferes with the operation of a heart pacemaker. Even if the magnetic field does not affect the device, it can damage its components or deactivate the entire device.
Magnets are not toys, youngest should not play with them.
Neodymium magnets are not toys. You cannot allow them to become toys for children. In such a situation, surgery is necessary to remove them. In the worst case scenario, it can result in death.
Neodymium magnets can attract to each other, pinch the skin, and cause significant injuries.
In the case of holding a finger in the path of a neodymium magnet, in that situation, a cut or a fracture may occur.
Neodymium magnets can become demagnetized at high temperatures.
While Neodymium magnets can lose their magnetic properties at high temperatures, it's important to note that the extent of this effect can vary based on factors such as the magnet's material, shape, and intended application.
Dust and powder from neodymium magnets are flammable.
Avoid drilling or mechanical processing of neodymium magnets. Once crushed into fine powder or dust, this material becomes highly flammable.
Neodymium magnets are among the most powerful magnets on Earth. The astonishing force they generate between each other can surprise you.
Make sure to review all the information we have provided. This will help you avoid harm to your body and damage to the magnets.
Keep neodymium magnets as far away as possible from GPS and smartphones.
Magnetic fields can interfere with compasses and magnetometers used in aviation and maritime navigation, as well as internal compasses of smartphones and GPS devices. There are neodymium magnets in every smartphone, for example, in the microphone and speakers.
Make sure not to bring neodymium magnets close to the TV, wallet, and computer HDD.
The strong magnetic field generated by neodymium magnets can destroy magnetic media such as floppy disks, video tapes, HDDs, credit cards, magnetic ID cards, cassette tapes, or other devices. They can also destroy videos, televisions, CRT computer monitors. Remember not to place neodymium magnets close to these electronic devices.
The magnet coating contains nickel, so be cautious if you have a nickel allergy.
Studies clearly indicate a small percentage of people who suffer from metal allergies such as nickel. An allergic reaction often manifests as skin redness and rash. If you have a nickel allergy, you can try wearing gloves or simply avoid direct contact with nickel-plated neodymium magnets.
Neodymium magnetic are highly susceptible to damage, resulting in breaking.
Neodymium magnets are characterized by considerable fragility. Neodymium magnetic are made of metal and coated with a shiny nickel, but they are not as durable as steel. At the moment of collision between the magnets, sharp metal fragments can be dispersed in different directions.
Safety rules!
So you are aware of why neodymium magnets are so dangerous, see the article titled How very dangerous are strong neodymium magnets?.