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neodymium magnets

We provide yellow color magnetic Nd2Fe14B - our store's offer. Practically all magnesy neodymowe on our website are in stock for immediate purchase (see the list). Check out the magnet price list for more details see the magnet price list

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MP 20x8x6 / N38 - neodymium magnet

ring magnet

catalog number 030189

GTIN: 5906301812067

5.0

external diameter Ø

20 mm [±0,1 mm]

internal diameter Ø

8 mm [±0,1 mm]

height

6 mm [±0,1 mm]

magnetizing direction

↑ axial

capacity ~

2.74 kg / 26.87 N

magnetic induction ~

196.23 mT / 1,962 Gs

max. temperature

≤ 80 °C

5.17 PLN gross price (including VAT) / pcs +

4.20 PLN net price + 23% VAT / pcs

bulk discounts:

need more quantity?

price from 1 pcs
4.20 PLN
5.17 PLN
price from 143 pcs
3.95 PLN
4.86 PLN
price from 524 pcs
3.70 PLN
4.55 PLN

Don't know what to choose?

Give us a call tel: +48 888 99 98 98 or write through form on our website. You can check the power as well as the shape of neodymium magnets in our power calculator power calculator

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

Specification: ring magnet 20x8x6 / N38 ↑ axial

Characteristics: ring magnet 20x8x6 / N38 ↑ axial
Properties
Values
catalog number
030189
production / distribution
Dhit sp. z o.o.
country of origin
Poland / China / Germany
customs code
85059029
external diameter Ø
20 mm [±0,1 mm]
internal diameter Ø
8 mm [±0,1 mm]
height
6 mm [±0,1 mm]
magnetizing direction ?
↑ axial
capacity ~ ?
2.74 kg / 26.87 N
magnetic induction ~ ?
196.23 mT / 1,962 Gs
max. temperature ?
≤ 80 °C
coating type ?
[NiCuNi] nickel
weight
11.88 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
Due to unique properties, neodymium element MP 20x8x6 / N38 in a ring form finds extensive use in various industries. Thanks to a powerful magnetic field of 2.74 kg, which can be described as force, they are extremely useful in applications that require strong magnetism in a relatively small area. Applications of MP 20x8x6 / N38 magnets include electric motors, generators, sound devices, and several other devices that use magnets for generating motion or storing energy. Despite their significant strength, they have a comparatively low weight of 11.88 grams, which makes them more practical compared to heavier alternatives.

Shopping tips

Advantages as well as disadvantages of neodymium magnets NdFeB.

Apart from immense power, neodymium magnets have the following advantages:

  • They do not lose power over time - after about 10 years, their power decreases by only ~1% (theoretically),
  • They are highly resistant to demagnetization by external magnetic field,
  • Thanks to the shiny finish and nickel, gold, or silver coating, they have an aesthetic appearance,
  • They have exceptionally 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...
  • The ability for precise shaping and customization to specific needs – neodymium magnets can be produced in various forms and dimensions, which expands the range of their possible uses.
  • Wide application in advanced technologically fields – are used in computer drives, electric motors, medical apparatus or very advanced devices.

Disadvantages of neodymium magnets:

  • They are prone to breaking as they are extremely 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 simultaneously 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 form 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 suggest 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
  • Health risk associated with microscopic parts of magnets can be dangerous, if swallowed, which becomes significant in the context of child safety. Additionally, tiny parts of these products are able to be problematic in medical diagnosis after entering the body.

Exercise Caution with Neodymium Magnets

  Do not give neodymium magnets to children.

Remember that neodymium magnets are not toys. Be cautious and make sure no child plays 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.

The magnet is coated with nickel - be careful if you have an 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.

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. Even if the magnetic field does not affect the device, it can damage its components or deactivate the entire device.

Neodymium magnets can become demagnetized at high temperatures.

Although magnets are generally resilient, their ability to maintain their magnetic potency 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 over 10 times more powerful than ferrite magnets (the ones in speakers), and their power can shock you.

On our website, you can find information on how to use neodymium magnets. This will help you avoid injuries and prevent damage to the magnets.

Magnets will attract to each other, so remember not to allow them to pinch together without control or place your fingers in their path.

Magnets will attract each other within a distance of several to around 10 cm from each other. Don't put your fingers in the path of magnet attraction, because a significant injury may occur. Magnets, depending on their size, can even cut off a finger or alternatively there can be a serious pressure or even a fracture.

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

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. They can also damage televisions, VCRs, computer monitors, and CRT displays. You should especially avoid placing neodymium magnets near electronic devices.

Do not bring neodymium magnets close to 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 are highly fragile, they easily crack and can crumble.

Neodymium magnets are extremely delicate, and by joining them in an uncontrolled manner, they will break. Magnets made of neodymium 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.

Dust and powder from neodymium magnets are highly 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.

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

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e-mail: bok@dhit.pl

tel: +48 888 99 98 98