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MW 4x10 / N38 - neodymium magnet

cylindrical magnet

catalog number 010075

GTIN: 5906301810742

5.0

diameter Ø

4 mm [±0,1 mm]

height

10 mm [±0,1 mm]

magnetizing direction

↑ axial

capacity ~

2.21 kg / 21.67 N

magnetic induction ~

606.05 mT / 6,061 Gs

max. temperature

≤ 80 °C

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0.65 PLN net price + 23% VAT / pcs

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Give us a call tel: +48 888 99 98 98 or get in touch via contact form on our website. You can check the mass and the shape of neodymium magnets in our magnetic mass calculator magnetic mass calculator

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Specification: cylindrical magnet 4x10 / N38 ↑ axial

Characteristics: cylindrical magnet 4x10 / N38 ↑ axial

Properties

Values

catalog number

010075

GTIN

5906301810742

production / distribution

Dhit sp. z o.o.

country of origin

Poland / China / Germany

customs code

85059029

diameter Ø

4 mm [±0,1 mm]

height

10 mm [±0,1 mm]

magnetizing direction ?

↑ axial

capacity ~ ?

2.21 kg / 21.67 N

magnetic induction ~ ?

606.05 mT / 6,061 Gs

max. temperature ?

≤ 80 °C

coating type ?

[NiCuNi] nickel

weight

0.94 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

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

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

Cylindrical Neodymium Magnets min. MW 4x10 / N38 are magnets created of neodymium in a cylindrical shape. They are known for their very strong magnetic properties, which outperform traditional ferrite magnets. Because of their power, they are frequently employed in products that require powerful holding. The typical temperature resistance of such magnets is 80°C, but for cylindrical magnets, this temperature rises with the growth of the magnet. Additionally, various special coatings, such as nickel, gold, or chrome, are frequently applied to the surface of neodymium magnets to increase their durability to corrosion. The shape of a cylinder is also very popular among neodymium magnets. The magnet with the designation MW 4x10 / N38 and a magnetic lifting capacity of 2.21 kg weighs only 0.94 grams.

Cylindrical neodymium magnets, also known as Nd₂Fe₁₄B, represent the strongest known material for magnet production. Their production process is complicated and includes melting special neodymium alloys with other metals such as iron and boron. After a series of processes, such as heat and mechanical treatment, the magnets are made available for use in many applications, such as electric motors, audio-video equipment, and in the automotive and aerospace industries.
Moreover, although neodymium is part of the strongest magnets, they are susceptible to corrosion in humid environments. Therefore, they are coated with a coating of gold-nickel to increase their durability. It's worth noting that NdFeB neodymium magnets are about 13% lighter than SmCo magnets and, despite their power, easily break, which requires special caution during their handling. Therefore, any mechanical processing should be done before they are magnetized.

In terms of safety, there are several recommendations regarding the use of these magnets. They should not be used in acidic, basic, organic environments or where solvents are present, as well as in water or oil. Furthermore, they can distort data on magnetic cards and hard drives, although data deletion using a neodymium magnet is not guaranteed.

In terms of purchasing of cylindrical neodymium magnets, several enterprises offer such products. One of the recommended suppliers is our company Dhit, situated in Ożarów Mazowiecki, the address can be found directly in the contact tab. It is recommended to visit the site for the current information as well as offers, and before visiting, we recommend calling.

Due to their power, cylindrical neodymium magnets are useful in various applications, they can also constitute certain risk. Because of their significant magnetic power, they can pull metallic objects with significant force, which can lead to damaging skin as well as other surfaces, especially hands. One should not use neodymium magnets near equipment or data storage devices, such as credit cards, as they can destroy these devices in terms of magnetic recording. Moreover, neodymium magnets are prone to corrosion in humid environments, thus they are coated with a thin e.g., nickel layer. Generally, although they are very useful, they should be handled carefully.

Neodymium magnets, with the formula neodymium-iron-boron, are at this time the very strong magnets on the market. They are produced through a complicated sintering process, which involves melting special alloys of neodymium with other metals and then forming and heat treating. Their unmatched magnetic strength comes from the exceptional production technology and chemical composition.
In terms of properties in different environments, neodymium magnets are susceptible to corrosion, especially in humid conditions. Therefore, they are often coated with coatings, such as nickel, to protect them from environmental factors and extend their lifespan. Temperatures exceeding 130°C can result in a loss of their magnetic properties, although there are specific types of neodymium magnets that can withstand temperatures up to 230°C.
As for dangers, it is important to avoid using neodymium magnets in acidic environments, basic conditions, organic or solvent environments, unless they are insulated. Additionally, their use is not recommended in wet conditions, oil, or in an environment containing hydrogen, as they may forfeit their magnetic strength.

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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 10 years, their power decreases by only ~1% (theoretically),
They protect against demagnetization caused by external magnetic sources very well,
In other words, thanks to the glossy nickel, gold, or silver finish, the element gains an visually attractive appearance,
They exhibit extremely high magnetic induction on the surface of the magnet,
Magnetic neodymium magnets are characterized by hugely high magnetic induction on the surface of the magnet and can operate (depending on the form) even at temperatures of 230°C or higher...
Due to the option of accurate forming or adaptation to individual needs – neodymium magnets can be produced in a wide range of shapes and sizes, which enhances their versatility in applications.
Wide application in modern technologies – find application in hard drives, electric motors, medical equipment or various technologically advanced devices.

Disadvantages of neodymium magnets:

They are fragile when subjected to a strong impact. If the magnets are exposed to impacts, we recommend using magnets in a steel housing. The steel housing in the form of a holder protects the magnet from impacts, and at the same time increases its overall strength,
High temperatures can reduce the strength of neodymium magnets. Typically, after heating above 80°C, most of them experience a permanent loss in strength (although it is dependent on the shape and size). To prevent this, we offer special magnets marked with the symbol [AH], which are highly resistant to high temperatures. They can operate even at temperatures up to 230°C, making them an ideal solution for applications requiring high-temperature operation,
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,
The use of a cover or a magnetic holder is recommended due to the limited possibilities of manufacturing threads or complex shapes in the magnet
Health risk associated with microscopic parts of magnets are risky, in case of ingestion, which is crucial in the context of children's health. It's also worth noting that miniscule components of these magnets can hinder the diagnostic process after entering the body.

Exercise Caution with Neodymium Magnets

Comparing neodymium magnets to ferrite magnets (found in speakers), they are 10 times stronger, and their power can shock you.

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 magnets are extremely fragile, they easily fall apart and can become damaged.

Neodymium magnets are extremely delicate, and by joining them in an uncontrolled manner, they will crack. Magnets made of neodymium are made of metal and coated with a shiny nickel, but they are not as durable as steel. At the moment of collision between the magnets, small metal fragments can be dispersed in different directions.

Neodymium Magnets can attract to each other, pinch the skin, and cause significant swellings.

If the joining of neodymium magnets is not under control, at that time they may crumble and crack. Remember not to move them to each other or have them firmly in hands at a distance less than 10 cm.

Do not place neodymium magnets near a computer HDD, TV, and wallet.

Strong magnetic fields emitted by neodymium magnets can damage 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. Avoid placing neodymium magnets in close proximity to electronic devices.

Keep neodymium magnets as far away as possible from 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.

Do not give neodymium magnets to youngest children.

Neodymium magnets are not toys. You cannot allow them to become toys for children. In the case of small magnets, they can be swallowed and cause choking. In such cases, the only solution is to undergo surgery to remove the magnets, and otherwise, it can even lead to death.

People with pacemakers are advised to avoid neodymium magnets.

Neodymium magnets generate strong magnetic fields. As a result, they 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.

The magnet coating contains nickel, so be cautious if you have a nickel 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.

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 can become demagnetized at high temperatures.

In certain circumstances, Neodymium magnets can lose their magnetism when subjected to high temperatures.

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

MW 4x10 / N38 - neodymium magnet

cylindrical magnet

Specification: cylindrical magnet 4x10 / N38 ↑ axial

Magnetic properties of the material N38

Physical properties of sintered neodymium magnets Nd2Fe14B

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Advantages as well as disadvantages of neodymium magnets NdFeB.

Physical properties of sintered neodymium magnets Nd₂Fe₁₄B