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MPL 50x50x10 / N38 - lamellar magnet

lamellar magnet

Catalog no 020167

GTIN: 5906301811732

5

length [±0,1 mm]

50 mm

Width [±0,1 mm]

50 mm

Height [±0,1 mm]

10 mm

Weight

187.5 g

Magnetization Direction

↑ axial

Load capacity

39.48 kg / 387.17 N

Magnetic Induction

209.75 mT

Coating

[NiCuNi] nickel

42.88 with VAT / pcs + price for transport

34.86 ZŁ net + 23% VAT / pcs

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MPL 50x50x10 / N38 - lamellar magnet

Specification/characteristics MPL 50x50x10 / N38 - lamellar magnet
properties
values
Cat. no.
020167
GTIN
5906301811732
Production/Distribution
Dhit sp. z o.o.
Country of origin
Poland / China / Germany
Customs code
85059029
length
50 mm [±0,1 mm]
Width
50 mm [±0,1 mm]
Height
10 mm [±0,1 mm]
Weight
187.5 g [±0,1 mm]
Magnetization Direction
↑ axial
Load capacity ~ ?
39.48 kg / 387.17 N
Magnetic Induction ~ ?
209.75 mT
Coating
[NiCuNi] nickel
Manufacturing Tolerance
± 0.1 mm

Magnetic properties of material N38

properties
values
units
remenance Br [Min. - Max.] ?
12.2-12.6
kGs
remenance Br [Min. - Max.] ?
1220-1260
T
coercivity bHc ?
10.8-11.5
kOe
coercivity bHc ?
860-915
kA/m
actual internal force iHc
≥ 12
kOe
actual internal force iHc
≥ 955
kA/m
energy density [Min. - Max.] ?
36-38
BH max MGOe
energy density [Min. - Max.] ?
287-303
BH max KJ/m
max. temperature ?
≤ 80
°C

Physical properties of NdFeB

properties
values
units
Vickers hardness
≥550
Hv
Density
≥7.4
g/cm3
Curie Temperature TC
312 - 380
°C
Curie Temperature TF
593 - 716
°F
Specific resistance
150
μΩ⋅Cm
Bending strength
250
Mpa
Compressive strength
1000~1100
Mpa
Thermal expansion parallel (∥) to orientation (M)
(3-4) x 106
°C-1
Thermal expansion perpendicular (⊥) to orientation (M)
-(1-3) x 10-6
°C-1
Young's modulus
1.7 x 104
kg/mm²

Shopping tips

Neodymium flat magnets i.e. MPL 50x50x10 / N38 are magnets made from neodymium in a flat form. They are appreciated for their very strong magnetic properties, which outshine traditional ferrite magnets.
Due to their power, flat magnets are commonly used in products that need strong holding power.
The standard temperature resistance of flat magnets is 80 °C, but depending on the dimensions, this value rises.
Moreover, flat magnets often have different coatings applied to their surfaces, such as nickel, gold, or chrome, to increase their corrosion resistance.
The magnet labeled MPL 50x50x10 / N38 and a magnetic strength 39.48 kg with a weight of just 187.5 grams, making it the perfect choice for applications requiring a flat shape.
Neodymium flat magnets present a range of advantages versus other magnet shapes, which lead to them being an ideal choice for various uses:
Contact surface: Due to their flat shape, flat magnets ensure a larger contact surface with adjacent parts, which can be beneficial in applications requiring a stronger magnetic connection.
Technology applications: These are often applied in various devices, such as sensors, stepper motors, or speakers, where the flat shape is important for their operation.
Mounting: Their flat shape makes mounting, particularly when it is necessary to attach the magnet to some surface.
Design flexibility: The flat shape of the magnets permits designers greater flexibility in arranging them in devices, which can be more difficult with magnets of more complex shapes.
Stability: In some applications, the flat base of the flat magnet may offer better stability, reducing the risk of sliding or rotating. However, it's important to note that the optimal shape of the magnet is dependent on the given use and requirements. In certain cases, other shapes, such as cylindrical or spherical, are more appropriate.
How do magnets work? Magnets attract objects made of ferromagnetic materials, such as iron, objects containing nickel, materials with cobalt and special alloys of ferromagnetic metals. Additionally, magnets may weaker affect alloys containing iron, such as steel. Magnets are used in many fields.
Magnets work thanks to the properties of the magnetic field, which is generated by the movement of electric charges within their material. The magnetic field of these objects creates attractive interactions, which affect objects made of iron or other magnetic materials.

Magnets have two poles: north (N) and south (S), which attract each other when they are different. Similar poles, such as two north poles, repel each other.
Due to these properties, magnets are often used in electrical devices, such as motors, speakers, sensors, or magnetic locks. Neodymium magnets stand out with the highest power of attraction, making them ideal for applications requiring strong magnetic fields. Additionally, the strength of a magnet depends on its dimensions and the materials used.
Magnets do not attract plastics, glass items, wooden materials or precious stones. Additionally, magnets do not affect certain metals, such as copper items, aluminum, copper, aluminum, and gold. These metals, although they are conductors of electricity, do not exhibit ferromagnetic properties, meaning that they do not respond to a standard magnetic field, unless exposed to a very strong magnetic field.
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 under such conditions, the magnet stops being magnetic. Additionally, strong magnets can interfere with the operation of devices, such as navigational instruments, magnetic stripe cards and even electronic devices sensitive to magnetic fields. Therefore, it is important to avoid placing magnets near such devices.
A neodymium magnet in classes N52 and N50 is a strong and extremely powerful magnetic product with the shape of a plate, featuring strong holding power and broad usability. Competitive price, 24h delivery, ruggedness and broad range of uses.

Advantages as well as disadvantages of neodymium magnets NdFeB.

In addition to their tremendous strength, neodymium magnets offer the following advantages:

  • They virtually do not lose power, because even after ten years, the decline in efficiency is only ~1% (according to literature),
  • They are highly resistant to demagnetization caused by external magnetic fields,
  • In other words, due to the metallic nickel coating, the magnet obtains an professional appearance,
  • Magnetic induction on the surface of these magnets is notably high,
  • Thanks to their high temperature resistance, they can operate (depending on the geometry) even at temperatures up to 230°C or more,
  • The ability for accurate shaping as well as adaptation to specific needs – neodymium magnets can be manufactured in a wide range of shapes and sizes, which enhances their versatility in applications,
  • Key role in cutting-edge sectors – they are utilized in HDDs, rotating machines, clinical machines along with technologically developed systems,
  • Relatively small size with high magnetic force – neodymium magnets offer impressive pulling strength in small dimensions, which makes them ideal in miniature devices

Disadvantages of rare earth magnets:

  • They are prone to breaking when subjected to a sudden impact. If the magnets are exposed to shocks, they should be placed in a protective case. The steel housing, in the form of a holder, protects the magnet from fracture and additionally reinforces its overall durability,
  • They lose power at elevated temperatures. Most neodymium magnets experience permanent loss in strength when heated above 80°C (depending on the shape and height). However, we offer special variants with high temperature resistance that can operate up to 230°C or higher,
  • Due to corrosion risk in humid conditions, it is advisable to use sealed magnets made of plastic for outdoor use,
  • The use of a protective casing or external holder is recommended, since machining internal cuts in neodymium magnets is restricted,
  • Safety concern related to magnet particles may arise, if ingested accidentally, which is notable in the health of young users. Furthermore, minuscule fragments from these assemblies have the potential to hinder health screening if inside the body,
  • Due to the price of neodymium, their cost is considerably higher,

Best holding force of the magnet in ideal parameterswhat it depends on?

The given holding capacity of the magnet means the highest holding force, measured in ideal conditions, specifically:

  • using a steel plate with low carbon content, acting as a magnetic circuit closure
  • with a thickness of minimum 10 mm
  • with a refined outer layer
  • with zero air gap
  • in a perpendicular direction of force
  • at room temperature

Key elements affecting lifting force

In practice, the holding capacity of a magnet is conditioned 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 suitable thickness (min. 20 mm), under perpendicular pulling force, whereas under parallel forces the holding force is lower. In addition, even a slight gap {between} the magnet’s surface and the plate lowers the load capacity.

Handle Neodymium Magnets Carefully

Neodymium magnets are the most powerful, most remarkable magnets on earth, and the surprising force between them can surprise you at first.

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.

  Magnets are not toys, youngest should not play with them.

Neodymium magnets are not toys. Be cautious and make sure no child plays with them. In the case of swallowing multiple magnets simultaneously, they can attract to each other through the intestinal walls. In the worst case scenario, this can lead to 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 also crack. You can't approach them to each other. At a distance less than 10 cm you should have them extremely firmly.

Do not place neodymium magnets near a computer HDD, TV, and wallet.

The strong magnetic field generated by neodymium magnets can destroy magnetic media such as floppy disks, video tapes, HDDs, credit cards, magnetic ID cards, cassette tapes, or other devices. They can also destroy devices like video players, televisions, CRT computer monitors. Remember not to place neodymium magnets close to these electronic devices.

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.

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.

Neodymium magnets can demagnetize at high temperatures.

Although magnets have demonstrated their effectiveness up to 80°C or 175°F, the temperature can vary depending on the type, shape, and intended use of the specific magnet.

Magnets made of neodymium are especially fragile, which leads to damage.

Neodymium magnets are characterized by significant fragility. 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.

Never bring neodymium magnets close to a phone and GPS.

Intense magnetic fields generated by neodymium magnets interfere with compasses and magnetometers used in navigation, as well as internal compasses of smartphones and GPS devices.

Neodymium magnets should not be near 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.

Warning!

So you are aware of why neodymium magnets are so dangerous, read the article titled How dangerous are powerful neodymium magnets?.

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tel: +48 888 99 98 98