← previous

Product available shipping tomorrow

MP 20x5x5 / N38 - ring magnet

ring magnet

Catalog no 030186

GTIN: 5906301812036

Diameter [±0,1 mm]

20 mm

internal diameter Ø [±0,1 mm]

5 mm

Height [±0,1 mm]

5 mm

Weight

17.67 g

Magnetization Direction

↑ axial

Load capacity

1.43 kg / 14.02 N

Magnetic Induction

275.98 mT

Coating

[NiCuNi] nickel

2.76 ZŁ with VAT / pcs + price for transport

2.24 ZŁ net + 23% VAT / pcs

bulk discounts:

Need more?

price from 1 pcs

2.24 ZŁ

2.76 ZŁ

price from 268 pcs

2.11 ZŁ

2.59 ZŁ

price from 1117 pcs

1.97 ZŁ

2.42 ZŁ

Carbon Footprint – environmental impact GPSR Regulation – product safety

Want to talk magnets?

Contact us by phone +48 888 99 98 98 if you prefer contact us via contact form the contact page.
Weight and appearance of magnets can be calculated using our force calculator.

Orders submitted before 14:00 will be dispatched today!

MP 20x5x5 / N38 - ring magnet

Specification/characteristics MP 20x5x5 / N38 - ring magnet

properties

values

Cat. no.

030186

GTIN

5906301812036

Production/Distribution

Dhit sp. z o.o.

Country of origin

Poland / China / Germany

Customs code

85059029

Diameter

20 mm [±0,1 mm]

internal diameter Ø

5 mm [±0,1 mm]

Height

5 mm [±0,1 mm]

Weight

17.67 g [±0,1 mm]

Magnetization Direction

↑ axial

Load capacity ~ ?

1.43 kg / 14.02 N

Magnetic Induction ~ ?

275.98 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

Shopping tips

Produkt dostępny wysyłka jutro!

MPL 100x40x20 / N38 - lamellar magnet

336.00 ZŁ / pcs

Produkt dostępny wysyłka jutro!

XT-6 magnetyzer do silników - BENZYNA + olej - XT-6 magnetizer

94.99 ZŁ / pcs

Produkt dostępny wysyłka jutro!

ZK XLINK 1026 elementów - construction toy

79.90 ZŁ / pcs

Produkt dostępny wysyłka jutro!

MW 10x15 / N38 - cylindrical magnet

5.04 ZŁ / pcs

Neodymium magnets MP 20x5x5 / N38 in a ring form are commonly used in various industries due to their unique properties. Thanks to a powerful magnetic field of 1.43 kg, which can be described as lifting capacity, they are very helpful in applications that require high magnetic power in a compact space. Usage of MP 20x5x5 / N38 magnets include electrical mechanisms, generating systems, sound devices, and many other devices that use magnets for generating motion or energy storage. Despite their powerful strength, they have a relatively low weight of 17.67 grams, which makes them more convenient to use compared to bulkier alternatives.

Ring magnets work due to their 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. Additionally, ring magnets are resistant to demagnetization.

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 medical equipment, e.g., in scanning devices. Their ability to work in high temperatures and precise magnetic field control makes them indispensable in challenging industrial conditions.

Ring magnets stand out extraordinary pulling power, resistance to high temperatures, 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.

Thanks to their resistance to high temperatures, ring magnets operate reliably even in tough conditions. They do not lose their magnetic properties, 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 ring magnet in classes N50 and N52 is a powerful and highly strong metallic component shaped like a ring, that provides high force and versatile application. Good price, 24h delivery, resistance and universal usability.

Advantages as well as disadvantages of neodymium magnets NdFeB.

Besides their magnetic performance, neodymium magnets are valued for these benefits:

They do not lose their power approximately 10 years – the reduction of lifting capacity is only ~1% (based on measurements),
They show exceptional resistance to demagnetization from external magnetic fields,
Thanks to the glossy finish and gold coating, they have an visually attractive appearance,
They exhibit extremely high levels of magnetic induction near the outer area of the magnet,
Thanks to their exceptional temperature resistance, they can operate (depending on the shape) even at temperatures up to 230°C or more,
With the option for tailored forming and personalized design, these magnets can be produced in various shapes and sizes, greatly improving application potential,
Significant impact in modern technologies – they are utilized in data storage devices, electric motors, clinical machines as well as high-tech tools,
Thanks to their power density, small magnets offer high magnetic performance, with minimal size,

Disadvantages of rare earth magnets:

They are fragile when subjected to a strong impact. If the magnets are exposed to mechanical hits, it is advisable to use in a metal holder. The steel housing, in the form of a holder, protects the magnet from breakage , and at the same time reinforces its overall resistance,
They lose power at increased temperatures. Most neodymium magnets experience permanent reduction in strength when heated above 80°C (depending on the form and height). However, we offer special variants with high temperature resistance that can operate up to 230°C or higher,
Magnets exposed to damp air can oxidize. Therefore, for outdoor applications, it's best to use waterproof types made of coated materials,
Using a cover – such as a magnetic holder – is advised due to the difficulty in manufacturing complex structures directly in the magnet,
Safety concern related to magnet particles may arise, if ingested accidentally, which is important in the protection of children. It should also be noted that tiny components from these products can interfere with diagnostics when ingested,
In cases of mass production, neodymium magnet cost may not be economically viable,

Precautions

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 attract each other within a distance of several to about 10 cm from each other. Remember not to put fingers between magnets or alternatively in their path when they attract. Depending on how large the neodymium magnets are, they can lead to a cut or a fracture.

Dust and powder from neodymium magnets are flammable.

Do not attempt to drill into neodymium magnets. Mechanical processing is also not recommended. If the magnet is crushed into fine powder or dust, it becomes highly flammable.

Neodymium magnets are the strongest magnets ever created, and their strength can shock you.

Read the information on our website on how to properly utilize neodymium magnets and avoid significant harm to your body and unintentional disruption to the magnets.

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

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.

You should keep neodymium magnets at a safe distance from the wallet, computer, and TV.

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

Do not give neodymium magnets to children.

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.

Keep neodymium magnets away from people with pacemakers.

Neodymium magnets generate very strong magnetic fields that can interfere with the operation of a pacemaker. This happens because such devices have a function to deactivate them in a magnetic field.

Neodymium magnets can demagnetize 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.

Under no circumstances should neodymium magnets be brought 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.

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

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.

Safety precautions!

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