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MPL 25x2x6 / N38 - lamellar magnet

lamellar magnet

Catalog no 020509

length [±0,1 mm]

25 mm

Width [±0,1 mm]

2 mm

Height [±0,1 mm]

6 mm

Magnetization Direction

↑ axial

Magnetic Induction

558.90 mT

Coating

[NiCuNi] nickel

0.71 ZŁ with VAT / pcs + price for transport

0.58 ZŁ net + 23% VAT / pcs

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MPL 25x2x6 / N38 - lamellar magnet

Specification/characteristics MPL 25x2x6 / N38 - lamellar magnet

properties

values

Cat. no.

020509

Production/Distribution

Dhit sp. z o.o.

Country of origin

Poland / China / Germany

Customs code

85059029

length

25 mm [±0,1 mm]

Width

2 mm [±0,1 mm]

Height

6 mm [±0,1 mm]

Magnetization Direction

↑ axial

Magnetic Induction ~ ?

558.90 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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Neodymium flat magnets min. MPL 25x2x6 / N38 are magnets created from neodymium in a flat form. They are valued for their very strong magnetic properties, which outshine traditional ferrite magnets.
Thanks to their high strength, flat magnets are commonly used in products that require exceptional adhesion.
Most common temperature resistance of these magnets is 80 °C, but depending on the dimensions, this value grows.
Additionally, flat magnets commonly have different coatings applied to their surfaces, such as nickel, gold, or chrome, for enhancing their corrosion resistance.
The magnet with the designation MPL 25x2x6 / N38 i.e. a lifting capacity of 0 kg with a weight of a mere 0 grams, making it the perfect choice for applications requiring a flat shape.

Neodymium flat magnets provide a range of advantages versus other magnet shapes, which make them being an ideal choice for various uses:
Contact surface: Thanks to their flat shape, flat magnets guarantee a greater contact surface with other components, which is beneficial in applications needing a stronger magnetic connection.
Technology applications: These magnets are often used in different devices, e.g. sensors, stepper motors, or speakers, where the thin and wide shape is crucial for their operation.
Mounting: This form's flat shape simplifies mounting, particularly when it is required to attach the magnet to some surface.
Design flexibility: The flat shape of the magnets permits designers greater flexibility in placing them in devices, which can be more difficult with magnets of other shapes.
Stability: In some applications, the flat base of the flat magnet can 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 more appropriate.

Attracted by magnets are objects made of ferromagnetic materials, such as iron, objects containing nickel, cobalt and alloys of metals with magnetic properties. Additionally, magnets may lesser affect some other metals, such as steel. Magnets are used in many fields.

Magnets work thanks to the properties of the magnetic field, which is generated by the movement of electric charges within their material. The magnetic field of magnets creates attractive interactions, which attract materials containing cobalt or other magnetic materials.

Magnets have two main poles: north (N) and south (S), which interact with each other when they are different. Poles of the same kind, such as two north poles, repel each other.
Thanks to this principle of operation, magnets are commonly used in magnetic technologies, e.g. motors, speakers, sensors, or magnetic locks. Neodymium magnets stand out with the greatest strength 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.

Magnets do not attract plastic, glass, wooden materials and precious stones. Additionally, magnets do not affect most metals, such as copper items, aluminum materials, gold. Although these metals conduct electricity, do not exhibit ferromagnetic properties, meaning that they remain unaffected by a magnet, unless they are subjected to an extremely 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 under such conditions, the magnet stops being magnetic. Additionally, strong magnets can interfere with the operation of devices, such as navigational instruments, magnetic stripe cards or electronic devices sensitive to magnetic fields. For this reason, it is important to avoid placing magnets near such devices.

A neodymium magnet with classification N52 and N50 is a strong and powerful magnetic product designed as a plate, providing high force and universal applicability. Competitive price, fast shipping, resistance and broad range of uses.

Advantages as well as disadvantages of neodymium magnets NdFeB.

In addition to their immense strength, neodymium magnets offer the following advantages:

They do not lose their power nearly ten years – the reduction of power is only ~1% (based on measurements),
Their ability to resist magnetic interference from external fields is impressive,
Because of the reflective layer of silver, the component looks high-end,
Magnetic induction on the surface of these magnets is notably high,
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 tailored forming and targeted design, these magnets can be produced in various shapes and sizes, greatly improving design adaptation,
Important function in new technology industries – they are utilized in data storage devices, rotating machines, healthcare devices or even technologically developed systems,
Thanks to their efficiency per volume, small magnets offer high magnetic performance, in miniature format,

Disadvantages of magnetic elements:

They may fracture when subjected to a strong 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 while also enhances its overall durability,
High temperatures may significantly reduce the holding force of neodymium magnets. Typically, above 80°C, they experience permanent decline 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 common to use sealed magnets made of plastic for outdoor use,
Limited ability to create complex details in the magnet – the use of a magnetic holder is recommended,
Potential hazard related to magnet particles may arise, when consumed by mistake, which is important in the health of young users. Furthermore, miniature parts from these devices have the potential to complicate medical imaging if inside the body,
Due to a complex production process, their cost is considerably higher,

Highest magnetic holding force – what it depends on?

The given pulling force of the magnet represents the maximum force, determined in a perfect environment, that is:

with the use of low-carbon steel plate acting as a magnetic yoke
having a thickness of no less than 10 millimeters
with a refined outer layer
with zero air gap
in a perpendicular direction of force
in normal thermal conditions

Determinants of practical lifting force of a magnet

The lifting capacity of a magnet is determined by in practice the following factors, ordered from most important to least significant:

Air gap between the magnet and the plate, because even a very small distance (e.g. 0.5 mm) causes a drop in lifting force of up to 50%.
Direction of applied force, because the maximum lifting capacity is achieved under perpendicular application. The force required to slide the magnet along the plate is usually several times lower.
Thickness of the plate, as a plate that is too thin causes part of the magnetic flux not to be used and to remain wasted in the air.
Material of the plate, because higher carbon content lowers holding force, while higher iron content increases it. The best choice is steel with high magnetic permeability and high saturation induction.
Surface of the plate, because the more smooth and polished it is, the better the contact and consequently the greater the magnetic saturation.
Operating temperature, since all permanent magnets have a negative temperature coefficient. This means that at high temperatures they are weaker, while at sub-zero temperatures they become slightly stronger.

* Lifting capacity testing was performed on a smooth plate of optimal thickness, under a perpendicular pulling force, however under parallel forces the holding force is lower. Moreover, even a slight gap {between} the magnet’s surface and the plate reduces the lifting capacity.

Exercise Caution with Neodymium Magnets

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.

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

Neodymium magnets generate strong magnetic fields that can destroy magnetic media such as floppy disks, video tapes, HDDs, credit cards, magnetic ID cards, cassette tapes, or other devices. They can also damage devices like video players, 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 stronger, and their power can surprise you.

To use magnets properly, it is best to familiarize yourself with our information beforehand. This will help you avoid significant harm to your body and the magnets themselves.

Neodymium magnets can become demagnetized at high temperatures.

Despite the fact that magnets have been observed to maintain their efficacy up to temperatures of 80°C or 175°F, it's essential to consider that this threshold may fluctuate depending on the magnet's type, configuration, and intended usage.

It is essential to keep neodymium magnets out of reach 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.

Keep neodymium magnets as far away as possible from GPS and smartphones.

Magnetic fields interfere with compasses and magnetometers used in navigation for air and sea transport, as well as internal compasses of smartphones and GPS devices.

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

Magnets will bounce and also clash together within a distance of several to around 10 cm from each other.

People with pacemakers are advised to avoid neodymium magnets.

In the case of neodymium magnets, there is a strong magnetic field. As a result, it interferes with the operation of a heart pacemaker. Even if the magnetic field does not affect the device, it can damage its components or deactivate the entire device.

The magnet coating contains nickel, so be cautious 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 extremely fragile, resulting in their cracking.

In the event of a collision between two neodymium magnets, it can result in them getting chipped. Despite being made of metal as well as 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.

Exercise caution!

Please read the article - What danger lies in neodymium magnets? You will learn how to handle them properly.