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neodymium magnets

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MP 32x16x3 / N38 - ring magnet

ring magnet

Catalog no 030198

GTIN: 5906301812159

5

Diameter [±0,1 mm]

32 mm

internal diameter Ø [±0,1 mm]

16 mm

Height [±0,1 mm]

3 mm

Weight

11.31 g

Magnetization Direction

↑ axial

Load capacity

2.74 kg / 26.87 N

Magnetic Induction

103.36 mT

Coating

[NiCuNi] nickel

5.24 with VAT / pcs + price for transport

4.26 ZŁ net + 23% VAT / pcs

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MP 32x16x3 / N38 - ring magnet

Specification/characteristics MP 32x16x3 / N38 - ring magnet
properties
values
Cat. no.
030198
GTIN
5906301812159
Production/Distribution
Dhit sp. z o.o.
Country of origin
Poland / China / Germany
Customs code
85059029
Diameter
32 mm [±0,1 mm]
internal diameter Ø
16 mm [±0,1 mm]
Height
3 mm [±0,1 mm]
Weight
11.31 g [±0,1 mm]
Magnetization Direction
↑ axial
Load capacity ~ ?
2.74 kg / 26.87 N
Magnetic Induction ~ ?
103.36 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
T
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
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 32x16x3 / N38 in a ring-shaped form are regularly used in various industries due to their specific properties. Thanks to a powerful magnetic field of 2.74 kg, which can be described as force, they are key in applications that require high magnetic power in a relatively small area. Applications of MP 32x16x3 / N38 magnets include electric motors, generators, audio systems, and several other devices that use magnets for producing motion or energy storage. Despite their powerful strength, they have a relatively low weight of 11.31 grams, which makes them more practical compared to heavier alternatives.
Ring magnets work due to their atomic structure. Their properties arise from a controlled production process, including sintering and magnetization, which allows for generating a strong and precise magnetic field. This field is ideal for applications in systems requiring motion control. Additionally, their resistance to high temperatures and demagnetization makes them indispensable in industry.
Ring magnets have a wide range of applications in many industries, such as production of electronic devices, such as speakers and electric motors, automotive, where they are used in brushless electric motors, and medical equipment, e.g., in scanning devices. Their ability to work in high temperatures and precise magnetic field control makes them ideal for technologically advanced applications.
Their uniqueness comes from extraordinary pulling power, ability to work in extreme conditions, precise control of the magnetic field. Thanks to their ring shape allows for application in devices requiring concentrated magnetic fields. Moreover, these magnets are more durable than traditional ferrite magnets, which has made them popular in advanced technologies and industrial applications.
Ring magnets perform excellently across a wide range of temperatures. Their magnetic properties remain stable, as long as the temperature does not exceed the Curie point. Compared to other types of magnets, ring magnets show greater resistance to demagnetization. Because of this, they are ideal for applications in the automotive industry, robotics, and devices requiring operation in changing or extreme environmental conditions.
A neodymium ring magnet in classes N52 and N50 is a powerful and strong magnetic product in the form of a ring, featuring strong holding power and universal applicability. Attractive price, 24h delivery, stability and versatility.

Advantages as well as disadvantages of neodymium magnets NdFeB.

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

  • Their strength remains stable, and after approximately ten years, it drops only by ~1% (according to research),
  • They remain magnetized despite exposure to strong external fields,
  • Because of the brilliant layer of gold, the component looks high-end,
  • They have exceptional magnetic induction on the surface of the magnet,
  • Neodymium magnets are known for strong magnetic induction and the ability to work at temperatures up to 230°C or higher (depending on the geometry),
  • Thanks to the flexibility in shaping and the capability to adapt to unique requirements, neodymium magnets can be created in various configurations, which broadens their functional possibilities,
  • Significant impact in new technology industries – they are used in computer drives, electric motors, clinical machines along with sophisticated instruments,
  • Relatively small size with high magnetic force – neodymium magnets offer strong power in compact dimensions, which makes them ideal in compact constructions

Disadvantages of rare earth magnets:

  • They are fragile when subjected to a strong impact. If the magnets are exposed to shocks, we recommend in a protective case. The steel housing, in the form of a holder, protects the magnet from fracture while also enhances its overall resistance,
  • Magnets lose magnetic efficiency 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 humidity can rust. Therefore, for outdoor applications, we suggest waterproof types made of rubber,
  • Limited ability to create complex details in the magnet – the use of a magnetic holder is recommended,
  • Safety concern due to small fragments may arise, when consumed by mistake, which is important in the family environments. Additionally, minuscule fragments from these assemblies might complicate medical imaging when ingested,
  • Higher purchase price is an important factor to consider compared to ceramic magnets, especially in budget-sensitive applications

Caution with Neodymium Magnets

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

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

Neodymium magnetic are noted for being fragile, which can cause them to shatter.

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 collision between the magnets, small metal fragments can be dispersed in different directions.

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.

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

Magnetic fields can interfere with compasses and magnetometers used in aviation and maritime navigation, as well as internal compasses of smartphones and GPS devices. There are neodymium magnets in every smartphone, for example, in the microphone and speakers.

Under no circumstances should neodymium magnets be placed near a computer HDD, TV, and wallet.

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. Avoid placing neodymium magnets in close proximity to electronic devices.

People with pacemakers are advised to avoid neodymium magnets.

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.

If you have a nickel allergy, avoid contact with neodymium magnets.

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.

Neodymium Magnets can attract to each other due to their immense internal force, causing the skin and other body parts to get pinched and resulting in significant injuries.

If joining of neodymium magnets is not under control, then they may crumble and also crack. You can't approach them to each other. At a distance less than 10 cm you should hold them extremely strongly.

  Magnets should not be treated as toys. Therefore, it is not recommended for youngest children to have access to them.

Neodymium magnets are not toys. You cannot allow them to become toys for children. 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.

Safety precautions!

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

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