← previous

Product available shipping tomorrow

MW 45x20 / N38 - cylindrical magnet

cylindrical magnet

Catalog no 010071

GTIN: 5906301810704

Diameter Ø [±0,1 mm]

45 mm

Height [±0,1 mm]

20 mm

Weight

238.56 g

Magnetization Direction

↑ axial

Load capacity

49.76 kg / 487.98 N

Magnetic Induction

411.81 mT

Coating

[NiCuNi] nickel

127.50 ZŁ with VAT / pcs + price for transport

103.66 ZŁ net + 23% VAT / pcs

bulk discounts:

Need more?

price from 1 pcs

103.66 ZŁ

127.50 ZŁ

price from 6 pcs

97.44 ZŁ

119.85 ZŁ

price from 25 pcs

91.22 ZŁ

112.20 ZŁ

Carbon Footprint – environmental impact GPSR Regulation – product safety

Need help making a decision?

Call us now +48 888 99 98 98 or send us a note by means of our online form the contact page.
Weight along with structure of magnets can be checked with our our magnetic calculator.

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

MW 45x20 / N38 - cylindrical magnet

Specification/characteristics MW 45x20 / N38 - cylindrical magnet

properties

values

Cat. no.

010071

GTIN

5906301810704

Production/Distribution

Dhit sp. z o.o.

Country of origin

Poland / China / Germany

Customs code

85059029

Diameter Ø

45 mm [±0,1 mm]

Height

20 mm [±0,1 mm]

Weight

238.56 g [±0,1 mm]

Magnetization Direction

↑ axial

Load capacity ~ ?

49.76 kg / 487.98 N

Magnetic Induction ~ ?

411.81 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 25x250 [2xM8] / N52 - magnetic separator

762.60 ZŁ / pcs

Produkt dostępny wysyłka jutro!

MPL 25x10x5 / N38 - lamellar magnet

4.30 ZŁ / pcs

Produkt dostępny wysyłka jutro!

MW 3x1 / N38 - cylindrical magnet

0.15 ZŁ / pcs

Produkt dostępny wysyłka jutro!

UMS 20x8.6x4.5x7 / N38 - conical magnetic holder

6.46 ZŁ / pcs

Cylindrical Neodymium Magnets i.e. MW 45x20 / N38 are magnets created of neodymium in a cylindrical shape. They are known for their very strong magnetic properties, which exceed ordinary iron magnets. Because of their power, they are frequently employed in products that need powerful holding. The standard temperature resistance of these magnets is 80 degrees C, but for magnets in a cylindrical form, this temperature rises with their height. 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 one of the most popular among neodymium magnets. The magnet with the designation MW 45x20 / N38 with a magnetic lifting capacity of 49.76 kg weighs only 238.56 grams.

Cylindrical neodymium magnets, often referred to 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 are made available 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 prone to corrosion in humid environments. For this reason, they are coated with a coating of silver to protect them from corrosion. It's worth noting that NdFeB neodymium magnets are about 13% lighter than SmCo magnets and, despite their power, are brittle, which requires care during their handling. For this reason, 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 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 guaranteed.

In terms of purchasing of cylindrical neodymium magnets, many companies offer such products. One of the suggested suppliers is our company Dhit, located in Ożarów Mazowiecki, the address is available directly in the contact tab. It is recommended to visit the site for the latest information as well as promotions, and before visiting, please call.

Due to their strength, cylindrical neodymium magnets are very practical in many applications, they can also constitute certain dangers. Because of their significant magnetic power, they can pull metallic objects with significant force, which can lead to crushing skin or other materials, especially fingers. Do 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 susceptible to corrosion in humid environments, thus 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 strongest available magnets on the market. They are produced through a advanced sintering process, which involves melting specific alloys of neodymium with other metals and then shaping and heat treating. Their unmatched magnetic strength comes from the specific production technology and chemical structure.
In terms of properties in different environments, neodymium magnets are susceptible to corrosion, especially in conditions of high humidity. Therefore, they are often coated with coatings, such as nickel, to shield them from environmental factors and prolong their durability. Temperatures exceeding 130°C can result in a deterioration of their magnetic strength, although there are specific types of neodymium magnets that can withstand 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 insulated. Additionally, their use is not recommended in water, oil, or in an atmosphere containing hydrogen, as they may lose their magnetic properties.

A cylindrical magnet with classification N50 and N52 is a strong and extremely powerful magnetic piece designed as a cylinder, providing strong holding power and broad usability. Competitive price, 24h delivery, stability and broad range of uses.

Advantages as well as disadvantages of neodymium magnets NdFeB.

In addition to their remarkable pulling force, neodymium magnets offer the following advantages:

They do not lose their even during nearly ten years – the loss of lifting capacity is only ~1% (theoretically),
Their ability to resist magnetic interference from external fields is among the best,
By applying a bright layer of gold, the element gains a clean look,
They possess significant magnetic force measurable at the magnet’s surface,
Thanks to their exceptional temperature resistance, they can operate (depending on the form) even at temperatures up to 230°C or more,
With the option for tailored forming and precise design, these magnets can be produced in numerous shapes and sizes, greatly improving design adaptation,
Wide application in cutting-edge sectors – they are utilized in data storage devices, electromechanical systems, healthcare devices and technologically developed systems,
Relatively small size with high magnetic force – neodymium magnets offer impressive pulling strength in compact dimensions, which makes them useful in miniature devices

Disadvantages of rare earth magnets:

They are prone to breaking when subjected to a heavy impact. If the magnets are exposed to shocks, we recommend in a steel housing. The steel housing, in the form of a holder, protects the magnet from cracks and reinforces its overall durability,
High temperatures may significantly reduce the field efficiency of neodymium magnets. Typically, above 80°C, they experience permanent weakening in performance (depending on size). 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,
They rust in a humid environment, especially when used outside, we recommend using encapsulated magnets, such as those made of polymer,
Limited ability to create threads in the magnet – the use of a mechanical support is recommended,
Health risk from tiny pieces may arise, if ingested accidentally, which is crucial in the protection of children. Moreover, miniature parts from these magnets may disrupt scanning after being swallowed,
Due to a complex production process, their cost is above average,

Caution with Neodymium Magnets

Dust and powder from neodymium magnets are flammable.

Avoid drilling or mechanical processing of neodymium magnets. Once crushed into fine powder or dust, this material becomes highly flammable.

Neodymium magnets should not be around youngest children.

Neodymium magnets are not toys. Be cautious and make sure no child plays 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.

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 injuries.

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

Neodymium magnets should not be near people with pacemakers.

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.

Do not bring neodymium magnets close to GPS and smartphones.

Neodymium magnets are a source of strong magnetic fields that cause interference with magnetometers and compasses used in navigation, as well as internal compasses of smartphones and GPS devices.

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

Make sure to review all the information we have provided. This will help you avoid harm to your body and damage to the magnets.

Neodymium magnets can demagnetize at high temperatures.

Although magnets are generally resilient, their ability to maintain their magnetic potency can be influenced by factors like the type of material used, the magnet's shape, and the intended purpose for which it is employed.

Avoid contact with neodymium magnets 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, try wearing gloves or avoid direct contact with nickel-plated neodymium magnets.

Neodymium magnetic are especially delicate, resulting in damage.

Neodymium magnets are characterized by significant fragility. Neodymium magnets are made of metal and coated with a shiny nickel surface, but they are not as hard as steel. In the event of a collision between two magnets, there may be a scattering of fragments in different directions. Protecting your eyes is crucial in such a situation.

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

Pay attention!

To show why neodymium magnets are so dangerous, see the article - How dangerous are very strong neodymium magnets?.