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neodymium magnets

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MP 16x12x2 / N38 - ring magnet

ring magnet

Catalog no 030183

GTIN: 5906301812005

5

Diameter [±0,1 mm]

16 mm

internal diameter Ø [±0,1 mm]

12 mm

Height [±0,1 mm]

2 mm

Weight

1.88 g

Magnetization Direction

↑ axial

Load capacity

1.37 kg / 13.44 N

Magnetic Induction

45.64 mT

Coating

[NiCuNi] nickel

1.304 with VAT / pcs + price for transport

1.060 ZŁ net + 23% VAT / pcs

bulk discounts:

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price from 1 pcs
1.060 ZŁ
1.304 ZŁ
price from 600 pcs
0.996 ZŁ
1.226 ZŁ
price from 2400 pcs
0.933 ZŁ
1.147 ZŁ

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Force along with shape of a neodymium magnet can be checked using our force calculator.

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MP 16x12x2 / N38 - ring magnet

Specification/characteristics MP 16x12x2 / N38 - ring magnet
properties
values
Cat. no.
030183
GTIN
5906301812005
Production/Distribution
Dhit sp. z o.o.
Country of origin
Poland / China / Germany
Customs code
85059029
Diameter
16 mm [±0,1 mm]
internal diameter Ø
12 mm [±0,1 mm]
Height
2 mm [±0,1 mm]
Weight
1.88 g [±0,1 mm]
Magnetization Direction
↑ axial
Load capacity ~ ?
1.37 kg / 13.44 N
Magnetic Induction ~ ?
45.64 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

Neodymium magnets MP 16x12x2 / N38 in a ring form are commonly used in various industries due to their unique properties. Thanks to a powerful magnetic field of 1.37 kg, which can be described as strength, they are very helpful in applications that require strong magnetism in a relatively small area. Applications of MP 16x12x2 / N38 magnets include electrical mechanisms, generating systems, sound devices, and several other devices that use magnets for generating motion or energy storage. Despite their powerful strength, they have a comparatively low weight of 1.88 grams, which makes them more practical compared to bulkier alternatives.
The operation of ring magnets results from their unique atomic structure. Their properties arise from a controlled production process, including sintering and magnetization, which allows for the creation of a concentrated magnetic field in a specific direction. This makes them perfect for devices such as stepper motors or industrial robots. Moreover, their resistance to high temperatures and demagnetization makes them indispensable in industry.
They are used in various fields of technology and industry, such as production of electronic devices, such as speakers and electric motors, the automotive industry, e.g., in the construction of electric motors, and medicine, where they are used in precision diagnostic devices. Thanks to their temperature resistance and precision makes them indispensable in challenging industrial conditions.
Ring magnets stand out extraordinary pulling power, ability to work in extreme conditions, precise control of the magnetic field. Thanks to their ring shape allows for effective use in devices such as motors or speakers. Moreover, these magnets are significantly stronger and more versatile than ferrite counterparts, making them an ideal choice in the automotive, electronics, and medical industries.
Ring magnets perform excellently across a wide range of temperatures. Their magnetic properties remain stable, until the Curie temperature is exceeded, which for neodymium magnets is around 80°C. They are more resistant to loss of magnetism than traditional ferrite magnets. For this reason, they are ideal for applications in the automotive industry, robotics, and devices requiring operation in changing or extreme environmental conditions.
A neodymium magnet of class N50 and N52 is a strong and powerful magnetic product shaped like a ring, that offers high force and versatile application. Attractive price, 24h delivery, stability and versatility.

Advantages and disadvantages of neodymium magnets NdFeB.

Besides their high retention, neodymium magnets are valued for these benefits:

  • They virtually do not lose power, because even after ten years, the decline in efficiency is only ~1% (based on calculations),
  • Their ability to resist magnetic interference from external fields is notable,
  • Thanks to the shiny finish and gold coating, they have an aesthetic appearance,
  • They possess significant magnetic force measurable at the magnet’s surface,
  • These magnets tolerate elevated temperatures, often exceeding 230°C, when properly designed (in relation to build),
  • With the option for fine forming and personalized design, these magnets can be produced in multiple shapes and sizes, greatly improving engineering flexibility,
  • Wide application in new technology industries – they are utilized in hard drives, electromechanical systems, medical equipment and high-tech tools,
  • Compactness – despite their small size, they provide high effectiveness, making them ideal for precision applications

Disadvantages of rare earth magnets:

  • They can break when subjected to a sudden impact. If the magnets are exposed to physical collisions, it is advisable to use in a metal holder. The steel housing, in the form of a holder, protects the magnet from damage while also enhances its overall robustness,
  • Magnets lose pulling force when exposed to temperatures exceeding 80°C. In most cases, this leads to irreversible power drop (influenced by the magnet’s form). To address this, we provide [AH] models with superior thermal resistance, able to operate even at 230°C or more,
  • Magnets exposed to moisture can corrode. Therefore, for outdoor applications, we suggest waterproof types made of coated materials,
  • Limited ability to create threads in the magnet – the use of a mechanical support is recommended,
  • Safety concern related to magnet particles may arise, especially if swallowed, which is notable in the family environments. Additionally, minuscule fragments from these magnets can disrupt scanning after being swallowed,
  • In cases of tight budgets, neodymium magnet cost may not be economically viable,

Best holding force of the magnet in ideal parameterswhat it depends on?

The given lifting capacity of the magnet corresponds to the maximum lifting force, determined in a perfect environment, namely:

  • with mild steel, serving as a magnetic flux conductor
  • having a thickness of no less than 10 millimeters
  • with a smooth surface
  • with no separation
  • under perpendicular detachment force
  • under standard ambient temperature

Impact of factors on magnetic holding capacity in practice

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

  • Air gap between the magnet and the plate, since 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 conducted on plates with a smooth surface of suitable thickness, under perpendicular forces, in contrast under shearing force the load capacity is reduced by as much as 5 times. Moreover, even a small distance {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. If the magnet is crushed into fine powder or dust, it becomes highly flammable.

Neodymium magnets can demagnetize at high temperatures.

Despite the general resilience of magnets, their ability to retain their magnetic strength can be influenced by factors like the type of material used, the magnet's shape, and the intended purpose for which it is employed.

Neodymium magnets are the most powerful, most remarkable magnets on the planet, and the surprising force between them can shock you at first.

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.

It is crucial not to allow the magnets to pinch together uncontrollably or place your fingers in their path as they attract to each other.

Magnets may crack or crumble with careless joining to each other. You can't move them to each other. At a distance less than 10 cm you should have them extremely firmly.

The magnet coating is made of nickel, so be cautious 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, you can try wearing gloves or simply avoid direct contact with nickel-plated neodymium magnets.

 It is important to keep neodymium magnets out of reach from children.

Remember that neodymium magnets are not toys. Do not allow children to play 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.

Do not bring neodymium magnets close to GPS and smartphones.

Intense magnetic fields generated by neodymium magnets interfere with compasses and magnetometers used in navigation, as well as internal compasses of smartphones and GPS devices.

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

The strong magnetic field generated by neodymium magnets can destroy magnetic media such as floppy disks, video tapes, HDDs, credit cards, magnetic ID cards, cassette tapes, or other devices. They can also destroy videos, televisions, CRT computer monitors. Do not forget to keep neodymium magnets at a safe distance from these electronic devices.

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.

Magnets made of neodymium are delicate and can easily break and get damaged.

Neodymium magnets are characterized by significant fragility. Neodymium magnets are made of metal and coated with a shiny nickel, but they are not as durable 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.

Caution!

In order for you to know how strong neodymium magnets are and why they are so dangerous, read the article - Dangerous very strong neodymium magnets.

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e-mail: bok@dhit.pl

tel: +48 888 99 98 98