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MP 40x22x10 / N38 - ring magnet

ring magnet

Catalog no 030344

GTIN: 5906301812296

Diameter [±0,1 mm]

40 mm

internal diameter Ø [±0,1 mm]

22 mm

Height [±0,1 mm]

10 mm

Weight

42.41 g

Magnetization Direction

↑ axial

Load capacity

12.54 kg / 122.98 N

Magnetic Induction

139.63 mT

Coating

[NiCuNi] nickel

40.59 ZŁ with VAT / pcs + price for transport

33.00 ZŁ net + 23% VAT / pcs

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MP 40x22x10 / N38 - ring magnet

Specification/characteristics MP 40x22x10 / N38 - ring magnet

properties

values

Cat. no.

030344

GTIN

5906301812296

Production/Distribution

Dhit sp. z o.o.

Country of origin

Poland / China / Germany

Customs code

85059029

Diameter

40 mm [±0,1 mm]

internal diameter Ø

22 mm [±0,1 mm]

Height

10 mm [±0,1 mm]

Weight

42.41 g [±0,1 mm]

Magnetization Direction

↑ axial

Load capacity ~ ?

12.54 kg / 122.98 N

Magnetic Induction ~ ?

139.63 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

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Neodymium magnets MP 40x22x10 / N38 in a ring form are commonly used in various industries due to their unique properties. Thanks to a powerful magnetic field of 12.54 kg, which can be described as strength, they are very helpful in applications that require high magnetic power in a compact space. Usage of MP 40x22x10 / N38 magnets include electric motors, generating systems, sound devices, and many other devices that use magnets for generating motion or storing energy. Despite their significant strength, they have a relatively low weight of 42.41 grams, which makes them more convenient to use compared to heavier 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. 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 electronics, e.g., in the production of speakers or electric motors, automotive, where they are used in brushless electric motors, and medicine, where they are used in precision diagnostic devices. Thanks to their temperature resistance and precision makes them ideal for technologically advanced applications.

Their uniqueness comes from high magnetic strength, ability to work in extreme conditions, and precision in generating the magnetic field. Thanks to their ring shape allows for application in devices requiring concentrated magnetic fields. Additionally, 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, 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 N50 and N52 is a powerful and strong metallic component designed as a ring, providing strong holding power and broad usability. Competitive price, 24h delivery, stability and multi-functionality.

Advantages and disadvantages of neodymium magnets NdFeB.

Besides their stability, neodymium magnets are valued for these benefits:

They retain their full power for around ten years – the drop is just ~1% (in theory),
They show strong resistance to demagnetization from external magnetic fields,
Thanks to the glossy finish and gold coating, they have an elegant 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 profile),
With the option for fine forming and targeted design, these magnets can be produced in various shapes and sizes, greatly improving engineering flexibility,
Key role in new technology industries – they serve a purpose in computer drives, electromechanical systems, medical equipment or even sophisticated instruments,
Compactness – despite their small size, they generate strong force, making them ideal for precision applications

Disadvantages of neodymium magnets:

They are fragile when subjected to a sudden impact. If the magnets are exposed to physical collisions, it is advisable to use in a protective case. The steel housing, in the form of a holder, protects the magnet from fracture and additionally enhances its overall strength,
High temperatures may significantly reduce the holding force of neodymium magnets. Typically, above 80°C, they experience permanent loss in performance (depending on form). To prevent this, we offer heat-resistant magnets marked [AH], capable of working up to 230°C, which makes them perfect for high-temperature use,
Due to corrosion risk in humid conditions, it is wise to use sealed magnets made of rubber for outdoor use,
Using a cover – such as a magnetic holder – is advised due to the limitations in manufacturing threads directly in the magnet,
Potential hazard linked to microscopic shards may arise, when consumed by mistake, which is significant in the health of young users. Furthermore, minuscule fragments from these devices can disrupt scanning once in the system,
Due to the price of neodymium, their cost is considerably higher,

Precautions

Neodymium magnets are over 10 times more powerful than ferrite magnets (the ones in speakers), and their strength can surprise you.

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.

Neodymium magnets are delicate and can easily crack and shatter.

Neodymium magnetic are highly delicate, and by joining them in an uncontrolled manner, they will crumble. 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, sharp metal fragments can be dispersed in different directions.

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

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 at a safe distance from these electronic devices.

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

Neodymium magnets are not toys. You cannot allow them to become toys for children. In such a situation, surgery is necessary to remove them. In the worst case scenario, it can result in 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.

Keep neodymium magnets away from people with pacemakers.

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.

Neodymium magnets can demagnetize at high temperatures.

Although magnets have shown to retain their effectiveness up to 80°C or 175°F, this temperature may vary depending on the type of material, shape, and intended use of the magnet.

Keep neodymium magnets away 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.

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

Neodymium magnets bounce and touch each other mutually within a distance of several to around 10 cm from each other.

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.

Be careful!

So that know how powerful neodymium magnets are and why they are so dangerous, read the article - Dangerous very powerful neodymium magnets.