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

Product available shipping tomorrow!

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

15.07 PLN gross price (including VAT) / pcs +

12.25 PLN net price + 23% VAT / pcs

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Give us a call tel: +48 888 99 98 98 or write through form on the contact page. You can check the power as well as the shape of neodymium magnets in our magnetic calculator force calculator

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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 in relation to other magnet shapes, which make the best choice for many applications:
Contact Surface: Due to their flat shape, disc magnets provide a larger contact surface with adjoining parts, which can be beneficial in applications needing a stronger magnetic connection.
Applications in Technology: They are often used in many devices, like sensors, stepper motors, or speakers, where a flat shape is essential for their operation.
Mounting: The flat form's flat shape makes mounting, especially when you need to adhere the magnet to another surface.
Design Flexibility: The disc shape of the magnets provides designers with greater flexibility in placing them in constructions, which can sometimes be more difficult with magnets of other shapes.
Stability: In certain applications, the flat base of a disc magnet can offer better stability, minimizing the risk of sliding 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, might be a better choice.

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Advantages as well as disadvantages of neodymium magnets NdFeB.

Apart from immense strength, neodymium magnets have the following advantages:

They do not lose power over time - after about 10 years, their power decreases by only ~1% (theoretically),
They are exceptionally resistant to demagnetization caused by an external magnetic field,
In other words, thanks to the shiny coating of nickel, gold, or silver, the element acquires an aesthetic appearance,
They exhibit very high magnetic induction on the surface of the magnet,
By using an appropriate combination of materials, they can achieve significant thermal resistance, allowing them to operate at temperatures up to 230°C and above...
The ability for precise shaping and customization to specific needs – neodymium magnets can be produced in many variants of shapes and sizes, which expands the range of their possible uses.
Significant importance in the industry of new technologies – are used in HDD drives, electric drive mechanisms, medical apparatus and very highly developed apparatuses.

Disadvantages of neodymium magnets:

They are prone to breaking as they are fragile when subjected to a strong impact. If the magnets are exposed to impacts, it is suggested using magnets in a metal holder. The steel housing in the form of a holder protects the magnet from impacts and simultaneously increases its overall strength,
Magnets lose their power due to exposure to high temperatures. In most cases, when the temperature exceeds 80°C, these magnets experience permanent reduction in strength (although it is worth noting that this is dependent on the shape and size of the magnet). To avoid this problem, we offer special magnets marked with the [AH] symbol, which exhibit high temperature resistance. They can operate even at temperatures as high as 230°C or more,
Magnets exposed to a humid environment can corrode. Therefore, when using them outdoors, we recommend using waterproof magnets made of rubber, plastic, or other moisture-resistant materials,
The use of a cover or a magnetic holder is recommended due to the limited possibilities of manufacturing threads or complex shapes in the magnet
Possible danger to health from tiny fragments of magnets are risky, if swallowed, which is crucial in the context of children's health. It's also worth noting that tiny parts of these magnets are able to hinder the diagnostic process in case of swallowing.

Precautions

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.

Dust and powder from neodymium magnets are flammable.

Avoid drilling or mechanical processing of neodymium magnets. If the magnet is crushed into fine powder or dust, it becomes highly flammable.

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

Magnets may crack or alternatively crumble with careless connecting to each other. You can't move them to each other. At a distance less than 10 cm you should hold them extremely strongly.

Keep neodymium magnets away from GPS and smartphones.

Neodymium magnets are a source of strong magnetic fields that cause interference with magnetometers and compasses used in navigation, as well as internal compasses of smartphones and GPS devices.

Keep neodymium magnets away from people with pacemakers.

Neodymium magnets generate very strong magnetic fields that can interfere with the operation of a pacemaker. This is because many of these devices are equipped with a function that deactivates the device in a magnetic field.

Keep neodymium magnets away from the wallet, computer, and TV.

Strong 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. In addition, they can damage televisions, VCRs, computer monitors, and CRT displays. You should especially avoid placing neodymium magnets near electronic devices.

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

Neodymium magnets are characterized by considerable 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.

Neodymium magnets are over 10 times more powerful than ferrite magnets (the ones in speakers), and their power can surprise 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.

Neodymium magnets should not be around children.

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.

The magnet is coated with nickel - be careful 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, try wearing gloves or avoid direct contact with nickel-plated neodymium magnets.

In order to illustrate why neodymium magnets are so dangerous, see the article - How dangerous are very strong 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

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cylindrical magnet 3x2 / N38 ↑ axial

cylindrical magnetic holder 20x6/3x7 / N38

lamellar magnet 30x5x5 / N38 ↑ axial

Advantages as well as disadvantages of neodymium magnets NdFeB.

Physical properties of sintered neodymium magnets Nd₂Fe₁₄B