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
15.14 ZŁ with VAT / pcs + price for transport
12.31 ZŁ net + 23% VAT / pcs
bulk discounts:
Need more?Want to talk magnets?
Contact us by phone
+48 22 499 98 98
if you prefer get in touch via
request form
the contact form page.
Weight and appearance of neodymium magnets can be checked with our
force calculator.
Orders placed before 14:00 will be shipped the same business day.
MW 25x5 / N38AH - cylindrical magnet
Magnetic properties of material N38AH
Physical properties of NdFeB
Shopping tips
Moreover, although neodymium is part of the strongest magnets, they are susceptible to corrosion in humid environments. For this reason, they are coated with a thin layer of silver 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. For this reason, any mechanical processing should be done before they are magnetized.
In terms of safety, there are many 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 susceptible to corrosion, especially in conditions of high humidity. Therefore, they are often coated with thin coatings, such as gold, to preserve them from external factors and extend their lifespan. Temperatures exceeding 130°C can cause a loss of their magnetic properties, although there are particular 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 conditions, basic conditions, organic or solvent environments, unless they are insulated. Additionally, their use is not recommended in wet conditions, oil, or in an environment containing hydrogen, as they may forfeit their magnetic properties.
Advantages as well as disadvantages of neodymium magnets NdFeB.
In addition to their tremendous magnetic power, neodymium magnets offer the following advantages:
- They retain their attractive force for nearly ten years – the drop is just ~1% (based on simulations),
- They remain magnetized despite exposure to strong external fields,
- Thanks to the glossy finish and silver coating, they have an elegant appearance,
- The outer field strength of the magnet shows elevated magnetic properties,
- Thanks to their exceptional temperature resistance, they can operate (depending on the form) even at temperatures up to 230°C or more,
- The ability for custom shaping or customization to specific needs – neodymium magnets can be manufactured in a wide range of shapes and sizes, which amplifies their functionality across industries,
- Wide application in modern technologies – they are used in hard drives, electromechanical systems, diagnostic apparatus as well as technologically developed systems,
- Thanks to their efficiency per volume, small magnets offer high magnetic performance, while occupying minimal space,
Disadvantages of rare earth magnets:
- They are prone to breaking when subjected to a powerful impact. If the magnets are exposed to physical collisions, we recommend in a protective case. The steel housing, in the form of a holder, protects the magnet from fracture , and at the same time enhances its overall robustness,
- High temperatures may significantly reduce the strength of neodymium magnets. Typically, above 80°C, they experience permanent decline in performance (depending on size). To prevent this, we offer heat-resistant magnets marked [AH], capable of working up to 230°C, which makes them perfect for high-temperature use,
- They rust in a damp environment – during outdoor use, we recommend using encapsulated magnets, such as those made of non-metallic materials,
- The use of a protective casing or external holder is recommended, since machining multi-axis shapes in neodymium magnets is risky,
- Possible threat from tiny pieces may arise, especially if swallowed, which is important in the context of child safety. Furthermore, small elements from these assemblies can disrupt scanning when ingested,
- High unit cost – neodymium magnets are more expensive than other types of magnets (e.g., ferrite), which may limit large-scale applications
Handle with Care: Neodymium Magnets
Keep neodymium magnets away from GPS and smartphones.
Magnetic fields interfere with compasses and magnetometers used in navigation for air and sea transport, as well as internal compasses of smartphones and GPS devices.
Neodymium magnets can become demagnetized at high temperatures.
In certain circumstances, Neodymium magnets can lose their magnetism when subjected to high temperatures.
The magnet is coated with nickel - be careful if you have an 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, try wearing gloves or avoid direct contact with nickel-plated neodymium magnets.
Neodymium magnets are over 10 times more powerful than ferrite magnets (the ones in speakers), and their power can shock you.
Please review the information on how to handle neodymium magnets and avoid significant harm to your body, as well as prevent unintentional damage to the magnets.
Keep neodymium magnets away from TV, wallet, and computer HDD.
Strong magnetic fields emitted by neodymium magnets can damage magnetic storage media such as floppy disks, credit cards, magnetic ID cards, cassette tapes, video tapes, or other devices. They can also damage televisions, VCRs, computer monitors, and CRT displays. Avoid placing neodymium magnets in close proximity to electronic devices.
People with pacemakers are advised to avoid neodymium magnets.
Neodymium magnets produce strong magnetic fields that can interfere 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.
It is important to maintain neodymium magnets out of reach from youngest children.
Neodymium magnets are not toys. Do not allow children to play with them. They can be a significant choking hazard. If multiple magnets are swallowed, they can attract to each other through the intestinal walls, causing significant injuries, and even death.
Dust and powder from neodymium magnets are flammable.
Do not attempt to drill into neodymium magnets. Mechanical processing is also not recommended. Once crushed into fine powder or dust, this material becomes highly flammable.
Neodymium Magnets can attract to each other due to their immense internal force, causing the skin and other body parts to get pinched and resulting in significant swellings.
Neodymium magnets jump and also touch each other mutually within a distance of several to around 10 cm from each other.
Magnets made of neodymium are particularly fragile, which leads to their breakage.
In the event of a collision between two neodymium magnets, it can result in them getting chipped. 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.
Caution!
To show why neodymium magnets are so dangerous, see the article - How dangerous are strong neodymium magnets?.
Tabela kosztu i czasu dostawy
Płatność przed wysyłką:
GLS kurier
Przesyłka będzie u Ciebie za ${delivery-gls-courier-cod-days-to-deliver} dni
${delivery-gls-courier-cod-cost}
InPost Paczkomaty 24/7
Przesyłka będzie u Ciebie za ${delivery-inpost-transfer-days-to-deliver} dni
${delivery-inpost-transfer-cost}
Płatność przy odbiorze (pobranie):
GLS kurier
Przesyłka będzie u Ciebie za ${delivery-gls-courier-transfer-days-to-deliver} dni
${delivery-gls-courier-transfer-cost}
Rate the product
Your rating