← previous

Product available shipping tomorrow

MW 20x18 / N38 - cylindrical magnet

cylindrical magnet

Catalog no 010040

GTIN: 5906301810391

Diameter Ø [±0,1 mm]

20 mm

Height [±0,1 mm]

18 mm

Weight

42.41 g

Magnetization Direction

↑ axial

Load capacity

19.91 kg / 195.25 N

Magnetic Induction

541.64 mT

Coating

[NiCuNi] nickel

23.54 ZŁ with VAT / pcs + price for transport

19.14 ZŁ net + 23% VAT / pcs

bulk discounts:

Need more?

price from 1 pcs

19.14 ZŁ

23.54 ZŁ

price from 32 pcs

17.99 ZŁ

22.13 ZŁ

price from 131 pcs

16.84 ZŁ

20.72 ZŁ

Carbon Footprint – environmental impact GPSR Regulation – product safety

Do you have trouble choosing?

Give us a call +48 22 499 98 98 if you prefer let us know through inquiry form the contact section.
Force as well as shape of magnetic components can be checked on our modular calculator.

Same-day processing for orders placed before 14:00.

MW 20x18 / N38 - cylindrical magnet

Specification/characteristics MW 20x18 / N38 - cylindrical magnet

properties

values

Cat. no.

010040

GTIN

5906301810391

Production/Distribution

Dhit sp. z o.o.

Country of origin

Poland / China / Germany

Customs code

85059029

Diameter Ø

20 mm [±0,1 mm]

Height

18 mm [±0,1 mm]

Weight

42.41 g [±0,1 mm]

Magnetization Direction

↑ axial

Load capacity ~ ?

19.91 kg / 195.25 N

Magnetic Induction ~ ?

541.64 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!

SM 32x100 [2xM8] / N42 - magnetic separator

307.50 ZŁ / pcs

Produkt dostępny wysyłka jutro!

UI 45x13x5 [M301] / N38 - badge holder

2.40 ZŁ / pcs

Produkt dostępny wysyłka jutro!

MW 3x6 / N38 - cylindrical magnet

0.30 ZŁ / pcs

Produkt dostępny wysyłka jutro!

UMP 135x40 [M10+M12] GW F600 Lina / N38 - search holder

649.99 ZŁ / pcs

Cylindrical Neodymium Magnets i.e. MW 20x18 / N38 are magnets made of neodymium in a cylinder form. They are known for their extremely powerful magnetic properties, which exceed traditional iron magnets. Because of their power, they are often employed in products that require strong adhesion. The typical temperature resistance of such magnets is 80°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 often applied to the surface of neodymium magnets to enhance their durability to corrosion. The cylindrical shape is also very popular among neodymium magnets. The magnet with the designation MW 20x18 / N38 and a magnetic force 19.91 kg weighs only 42.41 grams.

Cylindrical neodymium magnets, often referred to as Nd₂Fe₁₄B, are 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 appropriate processing, such as heat and mechanical treatment, the magnets become ready for use in many applications, including electric motors, audio-video equipment, and in the automotive and aerospace industries.
Moreover, although neodymium is a component of the strongest magnets, they are susceptible to corrosion in humid environments. For this reason, 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. Additionally, they can damage 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, many companies offer such products. One of the suggested suppliers is our company Dhit, situated in Ożarów Mazowiecki, the address can be found directly in the contact tab. It's always worth visit the site for the current information and promotions, and before visiting, please call.

Due to their power, cylindrical neodymium magnets are useful in various applications, they can also pose certain risk. Because of their significant magnetic power, they can pull metallic objects with significant force, which can lead to crushing skin and other materials, especially hands. 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. Furthermore, neodymium magnets are susceptible to corrosion in humid environments, thus they are coated with a thin protective 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 strong magnets on the market. They are produced through a advanced sintering process, which involves melting specific alloys of neodymium with additional metals and then shaping and thermal processing. Their powerful magnetic strength comes from the exceptional production technology and chemical composition.
In terms of properties in different environments, neodymium magnets are sensitive to corrosion, especially in humid conditions. Therefore, they are often covered with coatings, such as silver, to protect them from environmental factors and prolong their durability. Temperatures exceeding 130°C can cause a reduction of their magnetic properties, although there are specific types of neodymium magnets that can tolerate temperatures up to 230°C.
As for risks, it is important to avoid using neodymium magnets in acidic environments, basic environments, organic or solvent environments, unless they are adequately insulated. Additionally, their use is not recommended in wet conditions, oil, or in an atmosphere containing hydrogen, as they may lose their magnetic strength.

A cylindrical neodymium magnet of class N50 and N52 is a strong and powerful magnetic product with the shape of a cylinder, that offers high force and versatile application. Attractive price, availability, durability and universal usability.

Advantages as well as disadvantages of neodymium magnets NdFeB.

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

They do not lose their strength approximately ten years – the reduction of strength is only ~1% (based on measurements),
They show exceptional resistance to demagnetization from external field exposure,
In other words, due to the glossy nickel coating, the magnet obtains an stylish appearance,
They exhibit elevated levels of magnetic induction near the outer area of the magnet,
They are suitable for high-temperature applications, operating effectively at 230°C+ due to advanced heat resistance and form-specific properties,
Thanks to the flexibility in shaping and the capability to adapt to unique requirements, neodymium magnets can be created in different geometries, which expands their usage potential,
Important function in cutting-edge sectors – they serve a purpose in HDDs, electric drives, clinical machines along with technologically developed systems,
Compactness – despite their small size, they generate strong force, making them ideal for precision applications

Disadvantages of magnetic elements:

They may fracture when subjected to a heavy impact. If the magnets are exposed to mechanical hits, it is advisable to use in a protective case. The steel housing, in the form of a holder, protects the magnet from damage and additionally enhances its overall strength,
They lose field intensity at extreme temperatures. Most neodymium magnets experience permanent reduction in strength when heated above 80°C (depending on the shape and height). However, we offer special variants with high temperature resistance that can operate up to 230°C or higher,
They rust in a humid environment. For outdoor use, we recommend using encapsulated magnets, such as those made of rubber,
Limited ability to create precision features in the magnet – the use of a external casing is recommended,
Potential hazard from tiny pieces may arise, if ingested accidentally, which is crucial in the family environments. Moreover, minuscule fragments from these products can hinder health screening after being swallowed,
Due to the price of neodymium, their cost is considerably higher,

Handle Neodymium Magnets with Caution

Neodymium magnets are extremely delicate, they easily fall apart as well as can crumble.

Neodymium magnets are delicate as well as will crack if allowed to collide with each other, even from a distance of a few centimeters. Despite being made of metal as well as coated with a shiny nickel plating, they are not as hard as steel. At the moment of connection between the magnets, tiny sharp metal pieces can be propelled in various directions at high speed. Eye protection is recommended.

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

Magnets may crack or alternatively crumble with careless joining to each other. Remember not to approach them to each other or have them firmly in hands at a distance less than 10 cm.

The magnet coating contains nickel, so be cautious if you have a nickel 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, you can try wearing gloves or simply avoid direct contact with nickel-plated neodymium magnets.

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. In addition, they can damage televisions, VCRs, computer monitors, and CRT displays. Avoid placing neodymium magnets in close proximity to electronic devices.

Keep neodymium magnets away from GPS and smartphones.

Strong fields generated by neodymium magnets interfere with compasses and magnetometers used in navigation, as well as internal compasses of smartphones and GPS devices.

Neodymium magnets can demagnetize at high temperatures.

Whilst Neodymium magnets can lose their magnetic properties at high temperatures, it's important to note that the extent of this effect can vary based on factors such as the magnet's material, shape, and intended application.

Neodymium magnets should not be around youngest children.

Remember that neodymium magnets are not toys. Do not allow children to play with them. They can be a significant choking hazard. If multiple magnets are swallowed, they can attract to each other through the intestinal walls, causing significant injuries, and even death.

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.

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 are the strongest magnets ever invented. 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.

Safety rules!

In order for you to know how strong neodymium magnets are and why they are so dangerous, read the article - Dangerous very powerful neodymium magnets.