MP 12x8/4x3 / N38 - ring magnet
ring magnet
Catalog no 030395
GTIN: 5906301812326
Diameter [±0,1 mm]
12 mm
internal diameter Ø [±0,1 mm]
8/4 mm
Height [±0,1 mm]
3 mm
Weight
4.24 g
Magnetization Direction
↑ axial
Load capacity
0.68 kg / 6.67 N
Magnetic Induction
237.19 mT
Coating
[NiCuNi] nickel
2.64 ZŁ with VAT / pcs + price for transport
2.15 ZŁ net + 23% VAT / pcs
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MP 12x8/4x3 / N38 - ring magnet
Magnetic properties of material N38
Physical properties of NdFeB
Shopping tips
Advantages and disadvantages of neodymium magnets NdFeB.
In addition to their immense magnetic power, neodymium magnets offer the following advantages:
- They retain their magnetic properties for almost 10 years – the drop is just ~1% (in theory),
- They are very resistant to demagnetization caused by external magnetic fields,
- Thanks to the shiny finish and nickel coating, they have an elegant appearance,
- They exhibit elevated levels of magnetic induction near the outer area of the magnet,
- With the right combination of materials, they reach significant thermal stability, enabling operation at or above 230°C (depending on the design),
- With the option for tailored forming and personalized design, these magnets can be produced in numerous shapes and sizes, greatly improving engineering flexibility,
- Important function in cutting-edge sectors – they find application in computer drives, rotating machines, diagnostic apparatus and technologically developed systems,
- Thanks to their efficiency per volume, small magnets offer high magnetic performance, while occupying minimal space,
Disadvantages of neodymium magnets:
- They may fracture when subjected to a powerful impact. If the magnets are exposed to physical collisions, it is suggested to place them in a steel housing. The steel housing, in the form of a holder, protects the magnet from breakage , and at the same time enhances its overall resistance,
- 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 dimensions). 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. If exposed to rain, we recommend using sealed magnets, such as those made of non-metallic materials,
- Limited ability to create internal holes in the magnet – the use of a external casing is recommended,
- Health risk from tiny pieces may arise, if ingested accidentally, which is important in the health of young users. Additionally, small elements from these devices can disrupt scanning once in the system,
- In cases of tight budgets, neodymium magnet cost may be a barrier,
Caution with Neodymium Magnets
Neodymium magnets can attract to each other, pinch the skin, and cause significant injuries.
In the situation of placing a finger in the path of a neodymium magnet, in such a case, a cut or even a fracture may occur.
Neodymium magnets should not be in the vicinity children.
Neodymium magnets are not toys. Be cautious and make sure no child plays with them. Small magnets can pose a serious choking hazard. If multiple magnets are swallowed, they can attract to each other through the intestinal walls, causing significant injuries, and even death.
Keep neodymium magnets away from GPS and smartphones.
Neodymium magnets generate intense magnetic fields that interfere with magnetometers and compasses used in navigation, as well as internal compasses of smartphones and GPS devices.
Neodymium magnets are the strongest magnets ever created, and their strength can surprise you.
Read the information on our website on how to properly utilize neodymium magnets and avoid significant harm to your body and unintentional disruption to the magnets.
Magnets made of neodymium are particularly delicate, resulting in damage.
Neodymium magnets are fragile 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. At the moment of connection between the magnets, small sharp metal pieces can be propelled in various directions at high speed. Eye protection is recommended.
Keep neodymium magnets away from the wallet, computer, and TV.
Neodymium magnets generate intense magnetic fields that can damage magnetic media such as floppy disks, video tapes, HDDs, credit cards, magnetic ID cards, cassette tapes, etc. devices. They can also destroy videos, televisions, CRT computer monitors. Remember not to place neodymium magnets close to these electronic devices.
The magnet is coated with nickel. Therefore, exercise caution if you have an 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, try wearing gloves or avoid direct contact with nickel-plated neodymium magnets.
Neodymium magnets are not recommended for people with pacemakers.
Neodymium magnets generate very strong magnetic fields that can interfere with the operation of a pacemaker. This happens because such devices have a function to deactivate them in a magnetic field.
Neodymium magnets can demagnetize at high temperatures.
In certain circumstances, Neodymium magnets can lose their magnetism when subjected to high temperatures.
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.
Safety precautions!
So you are aware of why neodymium magnets are so dangerous, read the article titled How dangerous are strong neodymium magnets?.