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MPL 40x40x15 / N38 - lamellar magnet

lamellar magnet

Catalog no 020161

GTIN: 5906301811671

length [±0,1 mm]

40 mm

Width [±0,1 mm]

40 mm

Height [±0,1 mm]

15 mm

Weight

180 g

Magnetization Direction

↑ axial

Load capacity

47.38 kg / 464.64 N

Magnetic Induction

345.80 mT

Coating

[NiCuNi] nickel

65.01 ZŁ with VAT / pcs + price for transport

52.85 ZŁ net + 23% VAT / pcs

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MPL 40x40x15 / N38 - lamellar magnet

Specification/characteristics MPL 40x40x15 / N38 - lamellar magnet

properties

values

Cat. no.

020161

GTIN

5906301811671

Production/Distribution

Dhit sp. z o.o.

Country of origin

Poland / China / Germany

Customs code

85059029

length

40 mm [±0,1 mm]

Width

40 mm [±0,1 mm]

Height

15 mm [±0,1 mm]

Weight

180 g [±0,1 mm]

Magnetization Direction

↑ axial

Load capacity ~ ?

47.38 kg / 464.64 N

Magnetic Induction ~ ?

345.80 mT

Coating

[NiCuNi] nickel

Manufacturing Tolerance

± 0.1 mm

Magnetic properties of material N38

properties

values

units

coercivity bHc ?

860-915

kA/m

coercivity bHc ?

10.8-11.5

kOe

energy density [Min. - Max.] ?

287-303

BH max KJ/m

energy density [Min. - Max.] ?

36-38

BH max MGOe

remenance Br [Min. - Max.] ?

12.2-12.6

kGs

remenance Br [Min. - Max.] ?

1220-1260

actual internal force iHc

≥ 955

kA/m

actual internal force iHc

≥ 12

kOe

max. temperature ?

≤ 80

°C

Physical properties of NdFeB

properties

values

units

Vickers hardness

≥550

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

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Flat neodymium magnets i.e. MPL 40x40x15 / N38 are magnets created from neodymium in a flat form. They are known for their extremely powerful magnetic properties, which surpass traditional iron magnets.
Due to their strength, flat magnets are commonly used in products that require strong holding power.
Most common temperature resistance of flat magnets is 80 °C, but with larger dimensions, this value grows.
Moreover, flat magnets usually have special coatings applied to their surfaces, such as nickel, gold, or chrome, to improve their corrosion resistance.
The magnet named MPL 40x40x15 / N38 and a magnetic strength 47.38 kg with a weight of just 180 grams, making it the ideal choice for applications requiring a flat shape.

Neodymium flat magnets offer a range of advantages compared to other magnet shapes, which cause them being the best choice for a multitude of projects:
Contact surface: Thanks to their flat shape, flat magnets guarantee a larger contact surface with other components, which is beneficial in applications requiring a stronger magnetic connection.
Technology applications: These are often used in many devices, e.g. sensors, stepper motors, or speakers, where the flat shape is important for their operation.
Mounting: The flat form's 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 creators a lot of flexibility in placing them in structures, which is 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, one should remember that the optimal shape of the magnet depends on the specific application and requirements. In some cases, other shapes, such as cylindrical or spherical, may be a better choice.

Attracted by magnets are objects made of ferromagnetic materials, such as iron, nickel, materials with cobalt and alloys of metals with magnetic properties. Additionally, magnets may lesser affect alloys containing iron, such as steel. It’s worth noting that magnets are utilized in various devices and technologies.

Magnets work thanks to the properties of the magnetic field, which is generated by the movement of electric charges within their material. Magnetic fields of these objects creates attractive interactions, which affect materials containing iron or other ferromagnetic substances.

Magnets have two poles: north (N) and south (S), which interact with each other when they are oppositely oriented. Similar poles, such as two north poles, repel each other.
Thanks to this principle of operation, magnets are regularly used in magnetic technologies, such as motors, speakers, sensors, or magnetic locks. Neodymium magnets stand out with the greatest strength 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 plastic, glass items, wooden materials or precious stones. Additionally, magnets do not affect certain metals, such as copper, aluminum, items made of gold. Although these metals conduct electricity, do not exhibit ferromagnetic properties, meaning that they remain unaffected by a magnet, unless exposed to a very strong magnetic field.
It’s worth noting 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 electronic devices sensitive to magnetic fields. Therefore, it is important to exercise caution when using magnets.

A neodymium magnet with classification N50 and N52 is a strong and extremely powerful magnetic product shaped like a plate, featuring high force and universal applicability. Attractive price, fast shipping, resistance and broad range of uses.

Advantages and disadvantages of neodymium magnets NdFeB.

Besides their high retention, neodymium magnets are valued for these benefits:

They have unchanged lifting capacity, and over around 10 years their attraction force decreases symbolically – ~1% (in testing),
Their ability to resist magnetic interference from external fields is among the best,
By applying a shiny layer of nickel, the element gains a modern look,
They exhibit extremely high levels of magnetic induction near the outer area of the magnet,
They are suitable for high-temperature applications, operating effectively at 230°C+ due to advanced heat resistance and form-specific properties,
With the option for customized forming and precise design, these magnets can be produced in multiple shapes and sizes, greatly improving design adaptation,
Significant impact in advanced technical fields – they find application in HDDs, electric motors, medical equipment as well as sophisticated instruments,
Relatively small size with high magnetic force – neodymium magnets offer impressive pulling strength in tiny dimensions, which allows for use in compact constructions

Disadvantages of rare earth magnets:

They can break when subjected to a powerful impact. If the magnets are exposed to mechanical hits, they should be placed in a protective enclosure. The steel housing, in the form of a holder, protects the magnet from cracks and additionally reinforces its overall resistance,
High temperatures may significantly reduce the strength of neodymium magnets. Typically, above 80°C, they experience permanent weakening 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,
Due to corrosion risk in humid conditions, it is recommended to use sealed magnets made of plastic for outdoor use,
Limited ability to create complex details in the magnet – the use of a external casing is recommended,
Possible threat related to magnet particles may arise, in case of ingestion, which is notable in the context of child safety. Additionally, small elements from these assemblies have the potential to complicate medical imaging if inside the body,
Due to expensive raw materials, their cost is considerably higher,

Precautions with Neodymium Magnets

Avoid bringing neodymium magnets close to a phone or GPS.

Neodymium magnets produce strong magnetic fields that interfere with magnetometers and compasses used in navigation, as well as internal compasses of smartphones and GPS devices.

Neodymium magnets are highly delicate, they easily crack as well as can become damaged.

Magnets made of neodymium are fragile and will crack if allowed to collide with each other, even from a distance of a few centimeters. Despite being made of metal and coated with a shiny nickel plating, they are not as hard as steel. At the moment of connection between the magnets, small sharp metal fragments can be propelled in various directions at high speed. Eye protection is recommended.

Neodymium magnets are among the strongest magnets on Earth. The surprising force they generate between each other can surprise you.

On our website, you can find information on how to use neodymium magnets. This will help you avoid injuries and prevent damage to the magnets.

You should keep neodymium magnets at a safe distance from the wallet, computer, and TV.

Magnetic 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.

Neodymium magnets are primarily characterized by their significant internal force. They attract to each other, and any object that comes in their way will be affected.

If the joining of neodymium magnets is not controlled, then they may crumble and also crack. You can't move them to each other. At a distance less than 10 cm you should have them very strongly.

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.

Magnets should not be treated as toys. Therefore, it is not recommended for youngest children to have access to them.

Remember that neodymium magnets are not toys. Do not allow children to play 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.

Neodymium magnets can become demagnetized 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.

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.

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.

Be careful!

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