MW 25x5 / N38AH - cylindrical magnet
cylindrical magnet
Catalog no 010501
Diameter Ø [±0,1 mm]
25 mm
Height [±0,1 mm]
5 mm
Weight
18.41 g
Magnetization Direction
↑ axial
Load capacity
6.91 kg / 67.76 N
Magnetic Induction
219.99 mT
Coating
[NiCuNi] nickel
6.84 ZŁ with VAT / pcs + price for transport
5.56 ZŁ net + 23% VAT / pcs
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MW 25x5 / N38AH - cylindrical magnet
Magnetic properties of material N38AH
Physical properties of NdFeB
Shopping tips
Moreover, even though neodymium is part of the strongest magnets, they are susceptible to corrosion in humid environments. For this reason, they are coated with a coating of silver to increase their durability. Interestingly that NdFeB neodymium magnets are about 13% lighter than SmCo magnets and, despite their power, easily break, which requires special caution during their handling. For this reason, 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, and also in water or oil. Additionally, they can damage data on magnetic cards and hard drives, although data deletion using a neodymium magnet is not always certain.
In terms of properties in different environments, neodymium magnets are sensitive to corrosion, especially in humid conditions. Therefore, they are often coated with coatings, such as gold, to protect them from external factors and prolong their durability. Temperatures exceeding 130°C can cause a loss of their magnetic strength, although there are particular types of neodymium magnets that can tolerate temperatures up to 230°C.
As for dangers, it is important to avoid using neodymium magnets in acidic environments, basic environments, organic or solvent environments, unless they are insulated. Additionally, their use is not recommended in wet conditions, oil, or in an atmosphere containing hydrogen, as they may forfeit their magnetic properties.
Advantages and disadvantages of neodymium magnets NdFeB.
Apart from their superior magnetism, neodymium magnets have these key benefits:
- They do not lose their power around 10 years – the decrease of strength is only ~1% (based on measurements),
- Their ability to resist magnetic interference from external fields is notable,
- The use of a decorative nickel surface provides a eye-catching finish,
- They possess significant magnetic force measurable at the magnet’s surface,
- These magnets tolerate high temperatures, often exceeding 230°C, when properly designed (in relation to profile),
- The ability for accurate shaping as well as customization to individual needs – neodymium magnets can be manufactured in a wide range of shapes and sizes, which enhances their versatility in applications,
- Wide application in modern technologies – they serve a purpose in hard drives, rotating machines, healthcare devices along with high-tech tools,
- Relatively small size with high magnetic force – neodymium magnets offer intense magnetic field in small dimensions, which allows for use in small systems
Disadvantages of rare earth magnets:
- They are fragile 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 fracture and increases its overall strength,
- Magnets lose power when exposed to temperatures exceeding 80°C. In most cases, this leads to irreversible field weakening (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,
- Due to corrosion risk in humid conditions, it is wise to use sealed magnets made of protective material for outdoor use,
- Limited ability to create internal holes in the magnet – the use of a magnetic holder is recommended,
- Potential hazard related to magnet particles may arise, if ingested accidentally, which is important in the family environments. Moreover, minuscule fragments from these magnets can complicate medical imaging if inside the body,
- Due to expensive raw materials, their cost is above average,
Handle Neodymium Magnets Carefully
Keep neodymium magnets away from people with pacemakers.
In the case of neodymium magnets, there is a strong magnetic field. As a result, it interferes with the operation of a heart pacemaker. However, if the magnetic field does not affect the device, it can damage its components or deactivate the device when it is in a magnetic field.
Avoid contact with neodymium magnets if you have a nickel allergy.
Studies show a small percentage of people have allergies to certain metals, including 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.
Do not bring neodymium magnets close to GPS and smartphones.
Neodymium magnets are a source of intense magnetic fields that cause interference with magnetometers and compasses used in navigation, as well as internal compasses of smartphones and GPS devices.
Neodymium magnets are the most powerful magnets ever invented. Their power can shock you.
On our website, you can find information on how to use neodymium magnets. This will help you avoid injuries and prevent damage to the magnets.
Magnets made of neodymium are highly susceptible to damage, leading to their cracking.
Neodymium magnets are delicate as well as will shatter if allowed to collide with each other, even from a distance of a few centimeters. They are coated with a shiny nickel plating similar to steel, but they are not as hard. In the case of a collision between two magnets, there can be a scattering of small sharp metal fragments in different directions. Protecting your eyes is essential.
It is crucial not to allow the magnets to pinch together uncontrollably or place your fingers in their path as they attract to each other.
Neodymium magnets jump and clash mutually within a radius of several to almost 10 cm from each other.
Magnets should not be treated as toys. Therefore, it is not recommended for children to have access to them.
Not all neodymium magnets are toys, so do not let children play with them. In the case of small magnets, they can be swallowed and cause choking. In such cases, the only solution is to undergo surgery to remove the magnets, and otherwise, it can even lead to death.
Dust and powder from neodymium magnets are highly flammable.
Avoid drilling or mechanical processing of neodymium magnets. Once crushed into fine powder or dust, this material becomes highly flammable.
Keep neodymium magnets away from the wallet, computer, and TV.
Strong fields generated by neodymium magnets can damage magnetic storage media such as floppy disks, credit cards, magnetic ID cards, cassette tapes, video tapes, or other similar devices. They can also damage televisions, VCRs, computer monitors, and CRT displays. Avoid placing neodymium magnets in close proximity to electronic devices.
Neodymium magnets can become demagnetized at high temperatures.
In certain circumstances, Neodymium magnets may experience demagnetization when subjected to high temperatures.
Be careful!
In order for you to know how powerful neodymium magnets are and why they are so dangerous, read the article - Dangerous very strong neodymium magnets.
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