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MW 5x15 / N38 - cylindrical magnet

cylindrical magnet

Catalog no 010084

GTIN: 5906301810834

Diameter Ø [±0,1 mm]

5 mm

Height [±0,1 mm]

15 mm

Weight

2.21 g

Magnetization Direction

↑ axial

Load capacity

4.15 kg / 40.7 N

Magnetic Induction

610.03 mT

Coating

[NiCuNi] nickel

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0.80 ZŁ net + 23% VAT / pcs

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MW 5x15 / N38 - cylindrical magnet

Specification/characteristics MW 5x15 / N38 - cylindrical magnet

properties

values

Cat. no.

010084

GTIN

5906301810834

Production/Distribution

Dhit sp. z o.o.

Country of origin

Poland / China / Germany

Customs code

85059029

Diameter Ø

5 mm [±0,1 mm]

Height

15 mm [±0,1 mm]

Weight

2.21 g [±0,1 mm]

Magnetization Direction

↑ axial

Load capacity ~ ?

4.15 kg / 40.7 N

Magnetic Induction ~ ?

610.03 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 Cylindrical Magnets i.e. MW 5x15 / N38 are magnets created of neodymium in a cylinder form. They are valued for their very strong magnetic properties, which exceed ordinary ferrite magnets. Thanks to their strength, they are frequently employed in products that require strong adhesion. The standard temperature resistance of such magnets is 80 degrees C, but for magnets in a cylindrical form, this temperature increases 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 enhance their durability to corrosion. The shape of a cylinder is as well very popular among neodymium magnets. The magnet with the designation MW 5x15 / N38 with a magnetic strength 4.15 kg weighs only 2.21 grams.

Cylindrical neodymium magnets, also known as Nd₂Fe₁₄B, are the strongest known material for magnet production. The technology of their production requires a specialized approach and includes sintering special neodymium alloys along with other metals such as iron and boron. After appropriate processing, such as heat and mechanical treatment, the magnets become ready for use in many applications, such as electric motors, audio-video equipment, and in the automotive and aerospace industries.
Moreover, although neodymium is a component of the strongest magnets, they are prone to corrosion in humid environments. Therefore, they are coated with a thin layer of gold 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. For this reason, any mechanical processing should be done before they are magnetized.

In terms of safety, there are many recommendations regarding the use of these magnets. It is advisable to avoid their use in acidic, basic, organic environments or in solvents, and also in water or oil. Furthermore, they can distort data on magnetic cards and hard drives, although data deletion using a neodymium magnet is not always certain.

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 is available directly in the contact tab. It's always worth check the website for the latest information and offers, and before visiting, we recommend calling.

Due to their power, cylindrical neodymium magnets are very practical in various applications, they can also constitute certain risk. Due to their significant magnetic power, they can attract metallic objects with uncontrolled force, which can lead to crushing skin or other materials, especially fingers. Do not use neodymium magnets near electronic devices or data storage devices, such as credit cards, as they can damage these devices in terms of magnetic recording. Moreover, neodymium magnets are susceptible to corrosion in humid environments, therefore they are coated with a thin protective layer. In short, although they are very useful, one should handle them 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 advanced sintering process, which involves fusing special alloys of neodymium with additional metals and then shaping and heat treating. Their powerful magnetic strength comes from the specific 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 covered with coatings, such as silver, to shield them from external factors and prolong their durability. Temperatures exceeding 130°C can cause a deterioration of their magnetic properties, although there are specific types of neodymium magnets that can tolerate temperatures up to 230°C.
As for potential dangers, it is important to avoid using neodymium magnets in acidic environments, basic conditions, organic or solvent environments, unless they are properly protected. Additionally, their use is not recommended in water, oil, or in an environment containing hydrogen, as they may lose their magnetic properties.

A cylindrical magnet in classes N50 and N52 is a powerful and highly strong magnetic piece with the shape of a cylinder, that provides strong holding power and universal application. Attractive price, availability, ruggedness and broad range of uses.

Advantages and disadvantages of neodymium magnets NdFeB.

In addition to their magnetic efficiency, neodymium magnets provide the following advantages:

They retain their magnetic properties for almost ten years – the loss is just ~1% (according to analyses),
They remain magnetized despite exposure to magnetic noise,
In other words, due to the shiny silver coating, the magnet obtains an stylish appearance,
They have exceptional magnetic induction on the surface of the magnet,
These magnets tolerate high temperatures, often exceeding 230°C, when properly designed (in relation to form),
Thanks to the possibility in shaping and the capability to adapt to individual requirements, neodymium magnets can be created in different geometries, which increases their usage potential,
Significant impact in modern technologies – they serve a purpose in data storage devices, electric motors, diagnostic apparatus along with other advanced devices,
Thanks to their power density, small magnets offer high magnetic performance, while occupying minimal space,

Disadvantages of rare earth magnets:

They are fragile when subjected to a powerful impact. If the magnets are exposed to mechanical hits, they should be placed in a protective enclosure. The steel housing, in the form of a holder, protects the magnet from fracture , and at the same time strengthens 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 profile). 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 oxidize. Therefore, for outdoor applications, it's best to use waterproof types made of rubber,
The use of a protective casing or external holder is recommended, since machining internal cuts in neodymium magnets is not feasible,
Health risk from tiny pieces may arise, in case of ingestion, which is significant in the protection of children. Moreover, tiny components from these devices may complicate medical imaging after being swallowed,
Higher purchase price is an important factor to consider compared to ceramic magnets, especially in budget-sensitive applications

Exercise Caution with Neodymium Magnets

Under no circumstances should neodymium magnets be brought close to 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.

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

Not all neodymium magnets are toys, so do not let children play with them. In such a situation, surgery is necessary to remove them. In the worst case scenario, it can result in death.

Neodymium magnets are among the most powerful magnets on Earth. The surprising force they generate between each other 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 disruption to the 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. Even if the magnetic field does not affect the device, it can damage its components or deactivate the entire device.

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

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.

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.

Magnets made of neodymium are highly susceptible to damage, leading to shattering.

Magnets made of neodymium are delicate as well as will shatter if allowed to collide with each other, even from a distance of a few centimeters. They are coated with a shiny nickel plating similar to steel, but they are not as hard. At the moment of collision between the magnets, small sharp metal pieces can be propelled in various directions at high speed. Eye protection is recommended.

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 swellings.

In the case of placing a finger in the path of a neodymium magnet, in such a case, a cut or a fracture may occur.

Neodymium magnets can become demagnetized at high temperatures.

In certain circumstances, Neodymium magnets may experience demagnetization when subjected to high temperatures.

The magnet is coated with nickel. Therefore, exercise caution if you have an 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.

Exercise caution!

In order to show why neodymium magnets are so dangerous, read the article - How very dangerous are very strong neodymium magnets?.