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MPL 40x18x10 / N38 - lamellar magnet

lamellar magnet

Catalog no 020156

GTIN: 5906301811626

length [±0,1 mm]

40 mm

Width [±0,1 mm]

18 mm

Height [±0,1 mm]

10 mm

Weight

54 g

Magnetization Direction

↑ axial

Load capacity

21.19 kg / 207.8 N

Magnetic Induction

366.66 mT

Coating

[NiCuNi] nickel

21.40 ZŁ with VAT / pcs + price for transport

17.40 ZŁ net + 23% VAT / pcs

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MPL 40x18x10 / N38 - lamellar magnet

Specification/characteristics MPL 40x18x10 / N38 - lamellar magnet

properties

values

Cat. no.

020156

GTIN

5906301811626

Production/Distribution

Dhit sp. z o.o.

Country of origin

Poland / China / Germany

Customs code

85059029

length

40 mm [±0,1 mm]

Width

18 mm [±0,1 mm]

Height

10 mm [±0,1 mm]

Weight

54 g [±0,1 mm]

Magnetization Direction

↑ axial

Load capacity ~ ?

21.19 kg / 207.8 N

Magnetic Induction ~ ?

366.66 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 min. MPL 40x18x10 / N38 are magnets made from neodymium in a flat form. They are known for their extremely powerful magnetic properties, which outshine traditional ferrite magnets.
Thanks to their mighty power, flat magnets are commonly used in products that require strong holding power.
Most common temperature resistance of these magnets is 80 °C, but depending on the dimensions, this value can increase.
Moreover, flat magnets usually have different coatings applied to their surfaces, e.g. nickel, gold, or chrome, for enhancing their durability.
The magnet with the designation MPL 40x18x10 / N38 i.e. a magnetic strength 21.19 kg which weighs a mere 54 grams, making it the perfect choice for projects needing a flat magnet.

Neodymium flat magnets provide a range of advantages versus other magnet shapes, which lead to them being an ideal choice for many applications:
Contact surface: Due to their flat shape, flat magnets ensure a greater contact surface with adjacent parts, which can be beneficial in applications needing a stronger magnetic connection.
Technology applications: These are often used in many devices, such as sensors, stepper motors, or speakers, where the flat shape is crucial 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 gives the possibility designers a lot of flexibility in arranging them in structures, which is more difficult with magnets of other 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 project and requirements. In some cases, other shapes, such as cylindrical or spherical, are a better choice.

How do magnets work? Magnets attract ferromagnetic materials, such as iron, objects containing nickel, materials with cobalt or alloys of metals with magnetic properties. Moreover, magnets may weaker affect alloys containing iron, such as steel. It’s worth noting that magnets are utilized in various devices and technologies.

The operation of magnets is based on the properties of their magnetic field, which arises from the ordered movement of electrons in their structure. Magnetic fields of these objects creates attractive interactions, which affect objects made of iron or other ferromagnetic substances.

Magnets have two poles: north (N) and south (S), which attract each other when they are oppositely oriented. Poles of the same kind, e.g. two north poles, act repelling on each other.
Thanks to this principle of operation, magnets are commonly used in magnetic technologies, such as motors, speakers, sensors, or magnetic locks. Neodymium magnets stand out with the highest power of attraction, making them perfect for applications requiring powerful magnetic fields. Moreover, the strength of a magnet depends on its dimensions and the materials used.

Not all materials react to magnets, and examples of such substances are plastics, glass items, wood and most gemstones. Moreover, magnets do not affect certain metals, such as copper, aluminum, gold. These metals, although they are conductors of 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 high temperatures can weaken the magnet's effect. The Curie temperature is specific to each type of magnet, 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 avoid placing magnets near such devices.

A flat magnet in classes N52 and N50 is a strong and powerful magnetic product in the form of a plate, featuring high force and broad usability. Attractive price, availability, ruggedness and multi-functionality.

Advantages as well as disadvantages of neodymium magnets NdFeB.

Apart from their consistent magnetic energy, neodymium magnets have these key benefits:

They do not lose their power approximately 10 years – the loss of lifting capacity is only ~1% (based on measurements),
They show superior resistance to demagnetization from external field exposure,
In other words, due to the glossy nickel coating, the magnet obtains an stylish appearance,
Magnetic induction on the surface of these magnets is very strong,
These magnets tolerate elevated temperatures, often exceeding 230°C, when properly designed (in relation to profile),
The ability for accurate shaping and adaptation to custom needs – neodymium magnets can be manufactured in a wide range of shapes and sizes, which amplifies their functionality across industries,
Wide application in cutting-edge sectors – they are used in data storage devices, rotating machines, medical equipment along with sophisticated instruments,
Relatively small size with high magnetic force – neodymium magnets offer strong power in tiny dimensions, which makes them useful in compact constructions

Disadvantages of magnetic elements:

They are prone to breaking when subjected to a strong impact. If the magnets are exposed to physical collisions, we recommend in a metal holder. The steel housing, in the form of a holder, protects the magnet from fracture and enhances its overall robustness,
Magnets lose pulling force when exposed to temperatures exceeding 80°C. In most cases, this leads to irreversible performance loss (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,
Due to corrosion risk in humid conditions, it is common to use sealed magnets made of rubber for outdoor use,
Using a cover – such as a magnetic holder – is advised due to the challenges in manufacturing fine shapes directly in the magnet,
Health risk from tiny pieces may arise, when consumed by mistake, which is significant in the context of child safety. Furthermore, minuscule fragments from these magnets may disrupt scanning if inside the body,
Due to the price of neodymium, their cost is considerably higher,

Safety Precautions

Neodymium Magnets can attract to each other, pinch the skin, and cause significant injuries.

Neodymium magnets bounce and clash mutually within a radius of several to around 10 cm from each other.

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, or other devices. They can also damage videos, televisions, CRT computer monitors. Do not forget to keep neodymium magnets away from these electronic devices.

Comparing neodymium magnets to ferrite magnets (found in speakers), they are 10 times more powerful, and their power 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 damage to the magnets.

The magnet coating is made of nickel, so be cautious 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, you can try wearing gloves or simply avoid direct contact with nickel-plated neodymium magnets.

Keep neodymium magnets away from GPS and smartphones.

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 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.

Keep neodymium magnets away from youngest 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.

Magnets made of neodymium are particularly fragile, resulting in their breakage.

Magnets made of neodymium are extremely fragile, and by joining them in an uncontrolled manner, they will crack. Neodymium magnetic 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.

People with pacemakers are advised to avoid neodymium magnets.

Neodymium magnets produce strong magnetic fields that can interfere 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.

Dust and powder from neodymium magnets are flammable.

Avoid drilling or mechanical processing of neodymium magnets. Once crushed into fine powder or dust, this material becomes highly flammable.

Exercise caution!

In order to show why neodymium magnets are so dangerous, see the article - How very dangerous are very powerful neodymium magnets?.