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MPL 40x15x5x2[7/3.5] / N38 - neodymium magnet

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MPL 40x15x5x2[7/3.5] / N38 - neodymium magnet

lamellar magnet

catalog number 020154

GTIN: 5906301811602

5.0

length

40 mm [±0,1 mm]

width

15 mm [±0,1 mm]

height

5 mm [±0,1 mm]

magnetizing direction

↑ axial

capacity ~

9.67 kg / 94.83 N

magnetic induction ~

249.11 mT / 2,491 Gs

max. temperature

≤ 80 °C

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12.25 PLN net price + 23% VAT / pcs

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Specification: lamellar magnet 40x15x5x2[7/3.5] / N38 ↑ axial

Characteristics: lamellar magnet 40x15x5x2[7/3.5] / N38 ↑ axial

Properties

Values

catalog number

020154

GTIN

5906301811602

production / distribution

Dhit sp. z o.o.

country of origin

Poland / China / Germany

customs code

85059029

length

40 mm [±0,1 mm]

width

15 mm [±0,1 mm]

height

5 mm [±0,1 mm]

magnetizing direction ?

↑ axial

capacity ~ ?

9.67 kg / 94.83 N

magnetic induction ~ ?

249.11 mT / 2,491 Gs

max. temperature ?

≤ 80 °C

coating type ?

[NiCuNi] nickel

weight

22.50 g

execution tolerance

± 0.1 mm

Magnetic properties of the material N38

material characteristics N38

Properties

Values

units

remenance Br [Min. - Max.] ?

12.2-12.6

kGs

remenance Br [Min. - Max.] ?

1220-1260

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 sintered neodymium magnets Nd₂Fe₁₄B

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

Neodymium disc magnets offer a range of advantages compared to other magnet shapes, which cause them to be an excellent solution for various uses:
Contact Surface: Thanks to their flat shape, disc magnets guarantee a larger contact surface with other elements, which can be beneficial in applications needing a stronger magnetic connection.
Applications in Technology: The magnets are often utilized in various devices, such as sensors, stepper motors, or speakers, where a thin and wide shape is crucial for their operation.
Mounting: The flat form's flat shape makes mounting, particularly when it's necessary to adhere the magnet to another surface.
Design Flexibility: The flat shape of the magnets provides designers with greater flexibility in placing them in devices, which can sometimes be more difficult with magnets of more complex shapes.
Stability: In some applications, the flat base of a disc magnet may offer better stability, reducing the risk of shifting or rotating. Nevertheless, one should bear in mind that the optimal shape of a magnet depends on the particular use and requirements. In some cases, other shapes, such as cylindrical or spherical, may be a better choice.

Advantages and disadvantages of neodymium magnets NdFeB.

In addition to immense power, neodymium magnets have the following advantages:

They do not lose power over time - after about 10 years, their strength decreases by only ~1% (theoretically),
They are exceptionally resistant to demagnetization caused by an external magnetic field,
By applying a shiny coating of nickel, gold, or silver, the element gains an aesthetic appearance,
They have very high magnetic induction on the surface of the magnet,
By using an appropriate combination of materials, they can achieve high thermal resistance, allowing them to operate at temperatures up to 230°C and above...
Due to the option of accurate forming or adaptation to individual needs – neodymium magnets can be produced in various forms and dimensions, which expands the range of their possible uses.
Key role in modern technologies – are used in HDD drives, electric drive mechanisms, medical devices and very advanced devices.

Disadvantages of neodymium magnets:

They can break as they are extremely fragile when subjected to a powerful impact. If the magnets are exposed to impacts, it is suggested using magnets in a protective case. The steel housing in the form of a holder protects the magnet from impacts and also increases its overall strength,
They lose strength at high temperatures. Most neodymium magnets experience permanent loss of strength when heated above 80°C (depending on the shape and height). However, we also offer special magnets with high temperature resistance, up to 230°C,
Magnets exposed to a humid environment can corrode. Therefore, when using them outdoors, we suggest using waterproof magnets made of rubber, plastic, or other moisture-resistant materials,
The use of a cover - a magnetic holder is recommended due to the limited production capabilities of creating threads or complex shapes in the magnet
Potential hazard arising from small pieces of magnets are risky, when accidentally ingested, which is particularly important in the context of child safety. Additionally, tiny parts of these devices have the potential to be problematic in medical diagnosis after entering the body.

Exercise Caution with Neodymium Magnets

Neodymium magnets can become demagnetized 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 are the most powerful magnets ever created, and their power can shock you.

Make sure to review all the information we have provided. This will help you avoid harm to your body and damage to the magnets.

Do not give neodymium magnets to youngest children.

Neodymium magnets are not toys. Be cautious and make sure no child plays with them. They can be a significant choking hazard. If multiple magnets are swallowed, they can attract to each other through the intestinal walls, causing severe injuries, and even death.

Keep neodymium magnets away from 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.

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.

Magnets attract each other within a distance of several to about 10 cm from each other. Remember not to put fingers between magnets or in their path when they attract. Depending on how huge the neodymium magnets are, they can lead to a cut or alternatively a fracture.

Neodymium magnets are not recommended for people with pacemakers.

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.

Avoid contact with neodymium magnets if you have a nickel 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, try wearing gloves or avoid direct contact with nickel-plated neodymium magnets.

Magnets made of neodymium are noted for their fragility, which can cause them to crumble.

Magnets made of neodymium are fragile as well as 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. In the case of a collision between two magnets, there can be a scattering of small sharp metal fragments in different directions. Protecting your eyes is essential.

Under no circumstances should neodymium magnets be placed near a computer HDD, TV, and wallet.

Strong magnetic fields emitted by neodymium magnets can destroy magnetic storage media such as floppy disks, credit cards, magnetic ID cards, cassette tapes, video tapes, or other devices. In addition, they can damage televisions, VCRs, computer monitors, and CRT displays. You should especially avoid placing neodymium magnets near electronic devices.

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.

So that know how strong neodymium magnets are and why they are so dangerous, read the article - Dangerous very powerful neodymium magnets.

MPL 40x15x5x2[7/3.5] / N38 - neodymium magnet

lamellar magnet

Specification: lamellar magnet 40x15x5x2[7/3.5] / N38 ↑ axial

Magnetic properties of the material N38

Physical properties of sintered neodymium magnets Nd₂Fe₁₄B

Recommended articles for purchase

lamellar magnet 15x2x30 / N38 → diametrical

lamellar magnet 50x20x10 / N38 ↑ axial

cylindrical magnet 25x2.5 / N38 ↑ axial

lamellar magnet 10x10x10 / N38 ↑ axial

Advantages and disadvantages of neodymium magnets NdFeB.

MPL 40x15x5x2[7/3.5] / N38 - neodymium magnet

lamellar magnet

Specification: lamellar magnet 40x15x5x2[7/3.5] / N38 ↑ axial

Magnetic properties of the material N38

Physical properties of sintered neodymium magnets Nd2Fe14B

Recommended articles for purchase

lamellar magnet 15x2x30 / N38 → diametrical

lamellar magnet 50x20x10 / N38 ↑ axial

cylindrical magnet 25x2.5 / N38 ↑ axial

lamellar magnet 10x10x10 / N38 ↑ axial

Advantages and disadvantages of neodymium magnets NdFeB.

Physical properties of sintered neodymium magnets Nd₂Fe₁₄B