MW 12x50 / N38 - cylindrical magnet
cylindrical magnet
Catalog no 010020
GTIN: 5906301810193
Diameter Ø [±0,1 mm]
12 mm
Height [±0,1 mm]
50 mm
Weight
42.41 g
Magnetization Direction
↑ axial
Load capacity
33.18 kg / 325.38 N
Magnetic Induction
614.94 mT
Coating
[NiCuNi] nickel
23.95 ZŁ with VAT / pcs + price for transport
19.47 ZŁ net + 23% VAT / pcs
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MW 12x50 / N38 - cylindrical magnet
Magnetic properties of material N38
Physical properties of NdFeB
Shopping tips
Moreover, although neodymium is part of the strongest magnets, they are prone to corrosion in humid environments. Therefore, they are coated with a coating of gold-nickel to protect them from corrosion. 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 many recommendations regarding the use of these magnets. They should not be used in acidic, basic, organic environments or in solvents, as well as in water or oil. Furthermore, they can distort 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 conditions of high humidity. Therefore, they are often covered with coatings, such as gold, to shield them from environmental factors and prolong their durability. High temperatures exceeding 130°C can result in a deterioration of their magnetic properties, although there are specific types of neodymium magnets that can withstand 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 adequately insulated. Additionally, their use is not recommended in water, oil, or in an environment containing hydrogen, as they may lose their magnetic properties.
Advantages as well as disadvantages of neodymium magnets NdFeB.
In addition to their remarkable magnetic power, neodymium magnets offer the following advantages:
- They virtually do not lose strength, because even after 10 years, the performance loss is only ~1% (based on calculations),
- They remain magnetized despite exposure to magnetic surroundings,
- Because of the brilliant layer of nickel, the component looks visually appealing,
- Magnetic induction on the surface of these magnets is impressively powerful,
- These magnets tolerate extreme temperatures, often exceeding 230°C, when properly designed (in relation to build),
- With the option for fine forming and targeted design, these magnets can be produced in various shapes and sizes, greatly improving design adaptation,
- Key role in advanced technical fields – they are utilized in data storage devices, electric motors, healthcare devices or even sophisticated instruments,
- Compactness – despite their small size, they deliver powerful magnetism, making them ideal for precision applications
Disadvantages of rare earth magnets:
- They are fragile when subjected to a sudden impact. If the magnets are exposed to external force, they should be placed in a protective enclosure. The steel housing, in the form of a holder, protects the magnet from breakage and reinforces its overall durability,
- High temperatures may significantly reduce the magnetic power of neodymium magnets. Typically, above 80°C, they experience permanent deterioration in performance (depending on shape). 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 humid environment – during outdoor use, we recommend using moisture-resistant magnets, such as those made of rubber,
- The use of a protective casing or external holder is recommended, since machining internal cuts in neodymium magnets is difficult,
- Potential hazard due to small fragments may arise, when consumed by mistake, which is notable in the health of young users. It should also be noted that small elements from these devices have the potential to complicate medical imaging if inside the body,
- Higher purchase price is an important factor to consider compared to ceramic magnets, especially in budget-sensitive applications
Maximum lifting force for a neodymium magnet – what contributes to it?
The given pulling force of the magnet represents the maximum force, measured in ideal conditions, namely:
- with the use of low-carbon steel plate serving as a magnetic yoke
- of a thickness of at least 10 mm
- with a polished side
- with zero air gap
- with vertical force applied
- at room temperature
Lifting capacity in practice – influencing factors
In practice, the holding capacity of a magnet is affected by these factors, arranged from the most important to the least relevant:
- Air gap between the magnet and the plate, because even a very small distance (e.g. 0.5 mm) can cause a drop in lifting force of up to 50%.
- Direction of applied force, because the maximum lifting capacity is achieved under perpendicular application. The force required to slide the magnet along the plate is usually several times lower.
- Thickness of the plate, as a plate that is too thin causes part of the magnetic flux not to be used and to remain wasted in the air.
- Material of the plate, because higher carbon content lowers holding force, while higher iron content increases it. The best choice is steel with high magnetic permeability and high saturation induction.
- Surface of the plate, because the more smooth and polished it is, the better the contact and consequently the greater the magnetic saturation.
- Operating temperature, since all permanent magnets have a negative temperature coefficient. This means that at high temperatures they are weaker, while at sub-zero temperatures they become slightly stronger.
* Lifting capacity was assessed using a steel plate with a smooth surface of optimal thickness (min. 20 mm), under perpendicular detachment force, whereas under attempts to slide the magnet the lifting capacity is smaller. Moreover, even a small distance {between} the magnet and the plate decreases the holding force.
Be Cautious with Neodymium Magnets
Neodymium magnets can demagnetize at high temperatures.
Although magnets have shown to retain their effectiveness up to 80°C or 175°F, this temperature may vary depending on the type of material, shape, and intended use of the magnet.
Neodymium Magnets can attract to each other, pinch the skin, and cause significant swellings.
Neodymium magnets jump and touch each other mutually within a distance of several to around 10 cm from each other.
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, try wearing gloves or avoid direct contact with nickel-plated neodymium magnets.
Neodymium magnets should not be near 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.
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.
Do not bring neodymium magnets close to GPS and smartphones.
Neodymium magnets produce 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 delicate as well as can easily break and get damaged.
Magnets made of neodymium are extremely fragile, and by joining them in an uncontrolled manner, they will crumble. Magnets made of neodymium are made of metal and coated with a shiny nickel, but they are not as durable as steel. In the event of a collision between two magnets, there may be a scattering of fragments in different directions. Protecting your eyes is crucial in such a situation.
Maintain neodymium magnets far from children.
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.
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 are among the strongest magnets on Earth. The astonishing force they generate between each other can surprise you.
Familiarize yourself with our information to correctly handle these magnets and avoid significant injuries to your body and prevent damage to the magnets.
Safety precautions!
So you are aware of why neodymium magnets are so dangerous, read the article titled How very dangerous are very powerful neodymium magnets?.