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neodymium magnets

We provide yellow color magnetic Nd2Fe14B - our proposal. All "magnets" in our store are in stock for immediate purchase (see the list). See the magnet price list for more details see the magnet price list

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MPL 25x10x3 / N38 - neodymium magnet

lamellar magnet

catalog number 020387

GTIN: 5906301811862

5.0

length

25 mm [±0,1 mm]

width

10 mm [±0,1 mm]

height

3 mm [±0,1 mm]

magnetizing direction

↑ axial

capacity ~

3.75 kg / 36.77 N

magnetic induction ~

230.69 mT / 2,307 Gs

max. temperature

≤ 80 °C

4.30 PLN gross price (including VAT) / pcs +

3.50 PLN net price + 23% VAT / pcs

bulk discounts:

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price from 1 pcs
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Do you have doubts?

Call us tel: +48 888 99 98 98 or contact us through form on the contact page. You can check the power and the appearance of neodymium magnet in our magnetic mass calculator magnetic mass calculator

Orders placed by 2:00 PM will be shipped on the same business day.

Specification: lamellar magnet 25x10x3 / N38 ↑ axial

Characteristics: lamellar magnet 25x10x3 / N38 ↑ axial
Properties
Values
catalog number
020387
production / distribution
Dhit sp. z o.o.
country of origin
Poland / China / Germany
customs code
85059029
length
25 mm [±0,1 mm]
width
10 mm [±0,1 mm]
height
3 mm [±0,1 mm]
magnetizing direction ?
↑ axial
capacity ~ ?
3.75 kg / 36.77 N
magnetic induction ~ ?
230.69 mT / 2,307 Gs
max. temperature ?
≤ 80 °C
coating type ?
[NiCuNi] nickel
weight
5.63 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
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 sintered neodymium magnets Nd2Fe14B

Physical properties of sintered neodymium magnets Nd2Fe14B
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
Neodymium disc magnets provide a range of advantages compared to other magnet shapes, which make them the best choice for numerous projects:
Contact Surface: Thanks to their flat shape, disc magnets guarantee a significant contact surface with other elements, which is beneficial in applications requiring a stronger magnetic connection.
Applications in Technology: These magnets are often employed in different devices, such as sensors, stepper motors, or speakers, where a flat shape is crucial for their operation.
Mounting: The flat form's flat shape facilitates mounting, especially when you need to adhere the magnet to a surface.
Design Flexibility: The flat shape of the magnets provides designers with significant flexibility in arranging them in constructions, which can sometimes be more difficult with magnets of more complex shapes.
Stability: In certain applications, the flat base of a disc magnet can provide better stability, reducing the risk of sliding or rotating. It should be noted that the optimal shape of a magnet is dependent on the specific project and requirements. In some cases, other shapes, like cylindrical or spherical, may be a better choice.

List recommended items

Advantages as well as disadvantages of neodymium magnets NdFeB.

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

  • They do not lose their power (of the magnet). After approximately 10 years, their power decreases by only ~1% (theoretically),
  • They are extremely resistant to demagnetization by external magnetic sources,
  • In other words, thanks to the shiny coating of nickel, gold, or silver, the element acquires 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 significant 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 many variants of shapes or sizes, which expands the range of their possible uses.
  • Significant importance in advanced technologically fields – are utilized in HDD drives, electric motors, medical apparatus and various technologically advanced devices.

Disadvantages of neodymium magnets:

  • They are fragile when subjected to a strong impact. If the magnets are exposed to impacts, we recommend using magnets in a protective case. The steel housing in the form of a holder protects the magnet from impacts and at the same time increases its overall strength,
  • They lose power 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,
  • Due to their susceptibility to corrosion in a humid environment, we recommend using waterproof magnets made of rubber, plastic, or other moisture-resistant materials when using them outdoors,
  • Limited ability to create threads or complex shapes in the magnet - the use of a housing is recommended - magnetic holder
  • Potential hazard associated with microscopic parts of magnets are risky, when accidentally ingested, which is particularly important in the context of children's health. It's also worth noting that tiny parts of these products are able to complicate diagnosis in case of swallowing.

Exercise Caution with Neodymium Magnets

  Neodymium magnets should not be around children.

Not all neodymium magnets are toys, so do not let children play with them. Small magnets pose a serious choking hazard or can attract to each other in the intestines. In such cases, the only solution is to undergo surgery to remove the magnets, and otherwise, it can even lead to death.

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.

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

Strong magnetic fields emitted by neodymium magnets can damage magnetic storage media such as floppy disks, credit cards, magnetic ID cards, cassette tapes, video tapes, or other devices. They can also damage televisions, VCRs, computer monitors, and CRT displays. Avoid placing neodymium magnets in close proximity to electronic devices.

Under no circumstances should neodymium magnets be brought close to 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.

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.

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

If have a finger between or alternatively on the path of attracting magnets, there may be a large cut or even a fracture.

Neodymium magnetic are extremely delicate, they easily break and can crumble.

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. At the moment of connection between the magnets, small metal fragments can be dispersed in different directions.

Neodymium magnets can become demagnetized at high temperatures.

Whilst Neodymium magnets can lose their magnetic properties at high temperatures, it's important to note that the extent of this effect can vary based on factors such as the magnet's material, shape, and intended application.

The magnet coating contains nickel, so be cautious 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.

Comparing neodymium magnets to ferrite magnets (found in speakers), they are 10 times more powerful, and their strength can shock you.

Familiarize yourself with our information to correctly handle these magnets and avoid significant swellings to your body and prevent damage to the magnets.

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

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e-mail: bok@dhit.pl

tel: +48 888 99 98 98