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neodymium magnets

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Where to purchase very strong neodymium magnet? Magnetic holders in airtight, solid enclosure are ideally suited for use in variable and difficult weather conditions, including during snow and rain more...

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Magnetic holders can be applied to enhance manufacturing, underwater discoveries, or finding meteors made of metal read...

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MW 10x10 / N38 - cylindrical magnet

cylindrical magnet

Catalog no 010004

GTIN: 5906301810032

5

Diameter Ø [±0,1 mm]

10 mm

Height [±0,1 mm]

10 mm

Weight

5.89 g

Magnetization Direction

↑ axial

Load capacity

5.53 kg / 54.23 N

Magnetic Induction

553.84 mT

Coating

[NiCuNi] nickel

4.31 with VAT / pcs + price for transport

3.50 ZŁ net + 23% VAT / pcs

2.57 ZŁ net was the lowest price in the last 30 days

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MW 10x10 / N38 - cylindrical magnet

Specification/characteristics MW 10x10 / N38 - cylindrical magnet
properties
values
Cat. no.
010004
GTIN
5906301810032
Production/Distribution
Dhit sp. z o.o.
Country of origin
Poland / China / Germany
Customs code
85059029
Diameter Ø
10 mm [±0,1 mm]
Height
10 mm [±0,1 mm]
Weight
5.89 g [±0,1 mm]
Magnetization Direction
↑ axial
Load capacity ~ ?
5.53 kg / 54.23 N
Magnetic Induction ~ ?
553.84 mT
Coating
[NiCuNi] nickel
Manufacturing Tolerance
± 0.1 mm

Magnetic properties of material 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 NdFeB

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

Shopping tips

These rod-shaped products are made of high-performance rare earth material. This ensures powerful holding force while maintaining compact dimensions. Model MW 10x10 / N38 has a pull force of approx. 5.53 kg. Their symmetrical shape makes them ideal for mounting in drilled holes, electric motors and filters. The surface is protected by a Ni-Cu-Ni (Nickel-Copper-Nickel) coating.
We recommend installation by gluing into a hole with a slightly larger diameter (e.g. +0.1 mm clearance). Professional industrial adhesives are best, which do not react with the nickel coating. Never hammer the magnets, as neodymium is a ceramic sinter and is prone to chipping upon impact.
The magnet grade determines the pull force of the material. Larger numbers indicate a stronger magnetic field for the same size. The market standard is N38, which provides an optimal price-to-power ratio. For demanding applications, we recommend grade N52, which is the most powerful option on the market.
Neodymium magnets are coated with a protective layer of Ni-Cu-Ni (Nickel-Copper-Nickel), which protects against air humidity. This is not a hermetic barrier. During underwater use, the coating may be damaged, leading to rusting of the magnet. For such tasks, we recommend hermetic sealing or ordering a special version.
Their wide application covers advanced technologies. They are commonly used to build rotors in brushless motors and in filters catching metal filings. Additionally, due to their precise dimensions, they are ideal for measuring systems and sensors.
These magnets retain their properties up to 80 degrees Celsius. Exceeding this limit risks permanent loss of power. For work in hot environments (e.g. 120°C, 150°C, 200°C), we offer H, SH, or UH series on request. Please note that magnets are sensitive to rapid temperature changes.

Advantages and disadvantages of neodymium magnets NdFeB.

In addition to their long-term stability, neodymium magnets provide the following advantages:

  • They retain their attractive force for nearly 10 years – the drop is just ~1% (based on simulations),
  • They show exceptional resistance to demagnetization from external field exposure,
  • By applying a shiny layer of nickel, the element gains a modern look,
  • The outer field strength of the magnet shows advanced magnetic properties,
  • Thanks to their exceptional temperature resistance, they can operate (depending on the geometry) even at temperatures up to 230°C or more,
  • The ability for accurate shaping and adjustment to custom needs – neodymium magnets can be manufactured in a wide range of shapes and sizes, which enhances their versatility in applications,
  • Key role in new technology industries – they are utilized in HDDs, electric drives, diagnostic apparatus along with sophisticated instruments,
  • Thanks to their power density, small magnets offer high magnetic performance, in miniature format,

Disadvantages of rare earth magnets:

  • They may fracture when subjected to a sudden impact. If the magnets are exposed to shocks, it is suggested to place them in a protective case. The steel housing, in the form of a holder, protects the magnet from cracks , and at the same time strengthens its overall robustness,
  • They lose power at increased temperatures. Most neodymium magnets experience permanent decline in strength when heated above 80°C (depending on the geometry and height). However, we offer special variants with high temperature resistance that can operate up to 230°C or higher,
  • They rust in a wet environment. If exposed to rain, we recommend using moisture-resistant magnets, such as those made of non-metallic materials,
  • Using a cover – such as a magnetic holder – is advised due to the limitations in manufacturing complex structures directly in the magnet,
  • Health risk due to small fragments may arise, in case of ingestion, which is crucial in the context of child safety. Furthermore, small elements from these assemblies might interfere with diagnostics once in the system,
  • High unit cost – neodymium magnets are pricier than other types of magnets (e.g., ferrite), which can restrict large-scale applications

Maximum lifting force for a neodymium magnet – what affects it?

The given strength of the magnet represents the optimal strength, measured in the best circumstances, namely:

  • with the use of low-carbon steel plate serving as a magnetic yoke
  • with a thickness of minimum 10 mm
  • with a smooth surface
  • with zero air gap
  • in a perpendicular direction of force
  • under standard ambient temperature

What influences lifting capacity in practice

Practical lifting force is dependent on elements, listed from the most critical to the less significant:

  • Air gap between the magnet and the plate, since even a very small distance (e.g. 0.5 mm) can cause 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.

* Holding force was tested on the plate surface of 20 mm thickness, when the force acted perpendicularly, in contrast under parallel forces the lifting capacity is smaller. Moreover, even a minimal clearance {between} the magnet’s surface and the plate lowers the holding force.

Safety Guidelines with Neodymium Magnets

Neodymium magnetic are highly susceptible to damage, resulting in breaking.

Neodymium magnetic are delicate as well as will break if allowed to collide with each other, even from a distance of a few centimeters. They are coated with a shiny nickel plating similar to steel, but they are not as hard. At the moment of connection between the magnets, small sharp metal fragments can be propelled in various directions at high speed. Eye protection is recommended.

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

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

Neodymium magnets are not recommended for 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.

Neodymium magnets can demagnetize at high temperatures.

While 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.

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

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.

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

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

Neodymium magnets are the strongest magnets ever invented. Their strength can surprise you.

Please review the information on how to handle neodymium magnets and avoid significant harm to your body, as well as prevent unintentional disruption to the magnets.

Avoid bringing neodymium magnets close to a phone or GPS.

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.

 It is essential to keep neodymium magnets out of reach from 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.

Safety precautions!

So you are aware of why neodymium magnets are so dangerous, read the article titled How very dangerous are strong neodymium magnets?.

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e-mail: bok@dhit.pl

tel: +48 888 99 98 98