MP 25x7x9 / N38 - ring magnet
ring magnet
Catalog no 030195
GTIN: 5906301812128
Diameter [±0,1 mm]
25 mm
internal diameter Ø [±0,1 mm]
7 mm
Height [±0,1 mm]
9 mm
Weight
38.17 g
Magnetization Direction
↑ axial
Load capacity
3.59 kg / 35.21 N
Magnetic Induction
214.67 mT
Coating
[NiCuNi] nickel
12.55 ZŁ with VAT / pcs + price for transport
10.20 ZŁ net + 23% VAT / pcs
bulk discounts:
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MP 25x7x9 / N38 - ring magnet
Magnetic properties of material N38
Physical properties of NdFeB
Shopping tips
Advantages as well as disadvantages of neodymium magnets NdFeB.
Apart from their notable holding force, neodymium magnets have these key benefits:
- Their power is maintained, and after around ten years, it drops only by ~1% (according to research),
- They protect against demagnetization induced by external magnetic influence very well,
- In other words, due to the glossy gold coating, the magnet obtains an aesthetic appearance,
- They have very high magnetic induction on the surface of the magnet,
- These magnets tolerate extreme temperatures, often exceeding 230°C, when properly designed (in relation to build),
- The ability for accurate shaping as well as adjustment to specific needs – neodymium magnets can be manufactured in multiple variants of geometries, which extends the scope of their use cases,
- Wide application in advanced technical fields – they are used in HDDs, rotating machines, clinical machines and other advanced devices,
- Thanks to their concentrated strength, small magnets offer high magnetic performance, while occupying minimal space,
Disadvantages of NdFeB magnets:
- They can break when subjected to a heavy impact. If the magnets are exposed to external force, they should be placed in a metal holder. The steel housing, in the form of a holder, protects the magnet from damage and enhances its overall robustness,
- High temperatures may significantly reduce the strength of neodymium magnets. Typically, above 80°C, they experience permanent weakening in performance (depending on form). 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,
- Due to corrosion risk in humid conditions, it is common to use sealed magnets made of plastic for outdoor use,
- Limited ability to create threads in the magnet – the use of a external casing is recommended,
- Potential hazard related to magnet particles may arise, if ingested accidentally, which is crucial in the context of child safety. Additionally, minuscule fragments from these devices might hinder health screening when ingested,
- Due to expensive raw materials, their cost is above average,
Handle Neodymium Magnets with Caution
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.
Neodymium magnets are the strongest magnets ever invented. Their power can shock you.
To use magnets properly, it is best to familiarize yourself with our information beforehand. This will help you avoid significant harm to your body and the magnets themselves.
Under no circumstances should neodymium magnets be placed near a computer HDD, TV, and wallet.
Strong magnetic fields emitted by neodymium magnets can destroy 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.
Avoid bringing neodymium magnets close to a phone or GPS.
Strong fields generated by neodymium magnets interfere with compasses and magnetometers used in navigation, as well as internal compasses of smartphones and GPS devices.
Magnets are not toys, children should not play with them.
Not all neodymium magnets are toys, so do not let children play with them. In such a situation, surgery is necessary to remove them. In the worst case scenario, it can result in death.
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.
If you have a finger between or on the path of attracting magnets, there may be a severe cut or a fracture.
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 people with pacemakers.
Neodymium magnets generate strong magnetic fields. As a result, they interfere with the operation of a pacemaker. This happens because such devices have a function to deactivate them in a magnetic field.
Neodymium magnets are fragile and can easily break and shatter.
Neodymium magnetic are extremely delicate, and by joining them in an uncontrolled manner, they will crumble. 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, small metal fragments can be dispersed in different directions.
Avoid contact with neodymium magnets 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.
Safety rules!
Please see the article - What danger lies in neodymium magnets? You will learn how to handle them properly.