MPL 17x17x3 / N38 - lamellar magnet
lamellar magnet
Catalog no 020124
GTIN: 5906301811305
length [±0,1 mm]
17 mm
Width [±0,1 mm]
17 mm
Height [±0,1 mm]
3 mm
Weight
6.5 g
Magnetization Direction
↑ axial
Load capacity
4.03 kg / 39.52 N
Magnetic Induction
187.48 mT
Coating
[NiCuNi] nickel
4.71 ZŁ with VAT / pcs + price for transport
3.83 ZŁ net + 23% VAT / pcs
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MPL 17x17x3 / N38 - lamellar magnet
Magnetic properties of material N38
Physical properties of NdFeB
Shopping tips
Thanks to their high strength, flat magnets are frequently applied in structures that require exceptional adhesion.
The standard temperature resistance of flat magnets is 80 °C, but depending on the dimensions, this value rises.
Moreover, flat magnets commonly have different coatings applied to their surfaces, such as nickel, gold, or chrome, to improve their strength.
The magnet labeled MPL 17x17x3 / N38 i.e. a magnetic force 4.03 kg weighing a mere 6.5 grams, making it the ideal choice for applications requiring a flat shape.
Contact surface: Thanks to their flat shape, flat magnets ensure a larger contact surface with adjacent parts, which can be beneficial in applications needing a stronger magnetic connection.
Technology applications: These magnets are often used in different devices, such as sensors, stepper motors, or speakers, where the flat shape is necessary for their operation.
Mounting: Their flat shape makes mounting, particularly when it is necessary to attach the magnet to another surface.
Design flexibility: The flat shape of the magnets permits creators a lot of flexibility in placing them in devices, which is more difficult with magnets of other shapes.
Stability: In certain applications, the flat base of the flat magnet may offer better stability, minimizing the risk of sliding or rotating. It’s important to keep in mind that the optimal shape of the magnet is dependent on the given use and requirements. In some cases, other shapes, such as cylindrical or spherical, are more appropriate.
Magnets have two main poles: north (N) and south (S), which attract each other when they are different. Poles of the same kind, e.g. two north poles, repel each other.
Due to these properties, magnets are often used in magnetic technologies, e.g. motors, speakers, sensors, or magnetic locks. Neodymium magnets stand out with the highest power of attraction, making them indispensable for applications requiring strong magnetic fields. Additionally, the strength of a magnet depends on its size and the materials used.
It should be noted that extremely high temperatures, above the Curie point, cause a loss of magnetic properties in the magnet. Every magnetic material has its Curie point, meaning that once this temperature is exceeded, the magnet stops being magnetic. Additionally, strong magnets can interfere with the operation of devices, such as navigational instruments, magnetic stripe cards and even medical equipment, like pacemakers. For this reason, it is important to exercise caution when using magnets.
Advantages and disadvantages of neodymium magnets NdFeB.
Besides their durability, neodymium magnets are valued for these benefits:
- They virtually do not lose strength, because even after ten years, the decline in efficiency is only ~1% (based on calculations),
- They show strong resistance to demagnetization from external field exposure,
- Because of the lustrous layer of silver, the component looks aesthetically refined,
- They possess intense magnetic force measurable at the magnet’s surface,
- With the right combination of compounds, they reach increased thermal stability, enabling operation at or above 230°C (depending on the structure),
- The ability for custom shaping as well as customization to custom needs – neodymium magnets can be manufactured in many forms and dimensions, which extends the scope of their use cases,
- Important function in advanced technical fields – they serve a purpose in hard drives, rotating machines, diagnostic apparatus or even sophisticated instruments,
- Thanks to their concentrated strength, small magnets offer high magnetic performance, in miniature format,
Disadvantages of neodymium magnets:
- They are prone to breaking when subjected to a strong impact. If the magnets are exposed to physical collisions, they should be placed in a protective case. The steel housing, in the form of a holder, protects the magnet from damage and additionally reinforces its overall robustness,
- They lose power at elevated temperatures. Most neodymium magnets experience permanent loss in strength when heated above 80°C (depending on the form and height). However, we offer special variants with high temperature resistance that can operate up to 230°C or higher,
- They rust in a damp environment, especially when used outside, we recommend using waterproof magnets, such as those made of rubber,
- Using a cover – such as a magnetic holder – is advised due to the limitations in manufacturing fine shapes directly in the magnet,
- Health risk from tiny pieces may arise, especially if swallowed, which is crucial in the protection of children. Moreover, small elements from these assemblies have the potential to disrupt scanning when ingested,
- Due to a complex production process, their cost is relatively high,
Breakaway strength of the magnet in ideal conditions – what it depends on?
The given strength of the magnet means the optimal strength, determined in the best circumstances, namely:
- using a steel plate with low carbon content, acting as a magnetic circuit closure
- with a thickness of minimum 10 mm
- with a smooth surface
- in conditions of no clearance
- in a perpendicular direction of force
- in normal thermal conditions
Determinants of lifting force in real conditions
The lifting capacity of a magnet is determined by in practice the following factors, from primary to secondary:
- Air gap between the magnet and the plate, because even a very small distance (e.g. 0.5 mm) causes 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.
* Holding force was checked on a smooth steel plate of 20 mm thickness, when the force acted perpendicularly, however under parallel forces the lifting capacity is smaller. Additionally, even a slight gap {between} the magnet and the plate lowers the load capacity.
Exercise Caution with Neodymium Magnets
People with pacemakers are advised to avoid neodymium magnets.
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 the most powerful, most remarkable magnets on earth, and the surprising force between them can surprise you at first.
To handle 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.
The magnet coating is made of nickel, so be cautious 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, you can try wearing gloves or simply avoid direct contact with nickel-plated neodymium magnets.
Neodymium magnets are particularly fragile, resulting in damage.
Neodymium magnets are extremely delicate, and by joining them in an uncontrolled manner, they will break. Neodymium magnets are made of metal and coated with a shiny nickel surface, but they are not as hard 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.
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.
You should keep neodymium magnets at a safe distance from the wallet, computer, and TV.
The strong magnetic field generated by neodymium magnets 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.
Do not bring neodymium magnets close to GPS and smartphones.
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, youngest should not play with them.
Remember that 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 severe injuries, and even 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 joining of neodymium magnets is not controlled, at that time they may crumble and crack. Remember not to approach them to each other or hold them firmly in hands at a distance less than 10 cm.
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.
Warning!
To show why neodymium magnets are so dangerous, see the article - How very dangerous are strong neodymium magnets?.
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