tel: +48 888 99 98 98

neodymium magnets

We offer blue color magnetic Nd2Fe14B - our offer. Practically all magnesy neodymowe on our website are in stock for immediate purchase (check the list). See the magnet pricing for more details check the magnet price list

Magnet for searching F300 GOLD

Where to purchase powerful magnet? Magnetic holders in airtight, solid steel casing are excellent for use in variable and difficult weather conditions, including during rain and snow read...

magnetic holders

Magnetic holders can be used to improve production processes, underwater discoveries, or locating meteorites made of metal more information...

We promise to ship ordered magnets on the same day before 2:00 PM on weekdays.

Dhit sp. z o.o. logo
Product available shipping tomorrow

MW 25x5 / N38 - cylindrical magnet

cylindrical magnet

Catalog no 010049

GTIN: 5906301810483

5

Diameter Ø [±0,1 mm]

25 mm

Height [±0,1 mm]

5 mm

Weight

18.41 g

Magnetization Direction

↑ axial

Load capacity

6.91 kg / 67.76 N

Magnetic Induction

230.20 mT

Coating

[NiCuNi] nickel

9.20 with VAT / pcs + price for transport

7.48 ZŁ net + 23% VAT / pcs

bulk discounts:

Need more?

price from 1 pcs
7.48 ZŁ
9.20 ZŁ
price from 81 pcs
7.03 ZŁ
8.65 ZŁ
price from 335 pcs
6.58 ZŁ
8.10 ZŁ

Can't decide what to choose?

Give us a call +48 888 99 98 98 or drop us a message by means of our online form the contact page.
Strength as well as form of neodymium magnets can be tested using our magnetic mass calculator.

Orders submitted before 14:00 will be dispatched today!

MW 25x5 / N38 - cylindrical magnet

Specification/characteristics MW 25x5 / N38 - cylindrical magnet
properties
values
Cat. no.
010049
GTIN
5906301810483
Production/Distribution
Dhit sp. z o.o.
Country of origin
Poland / China / Germany
Customs code
85059029
Diameter Ø
25 mm [±0,1 mm]
Height
5 mm [±0,1 mm]
Weight
18.41 g [±0,1 mm]
Magnetization Direction
↑ axial
Load capacity ~ ?
6.91 kg / 67.76 N
Magnetic Induction ~ ?
230.20 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
T
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
Hv
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

Cylindrical Neodymium Magnets i.e. MW 25x5 / N38 are magnets made of neodymium in a cylinder form. They are known for their very strong magnetic properties, which exceed traditional ferrite magnets. Thanks to their power, they are often used in devices that need powerful holding. The standard temperature resistance of such magnets is 80 degrees C, but for cylindrical magnets, this temperature rises with the growth of the magnet. Moreover, 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 cylindrical shape is as well very popular among neodymium magnets. The magnet named MW 25x5 / N38 and a magnetic force 6.91 kg weighs only 18.41 grams.
Cylindrical neodymium magnets, also known as Nd2Fe14B, are the strongest known material for magnet production. The technology of their production is complicated and includes sintering 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 varied 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 coating of gold-nickel to protect them from corrosion. Interestingly that NdFeB neodymium magnets are about 13% lighter than SmCo magnets and, despite their power, are brittle, 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 several recommendations regarding the use of these magnets. It is advisable to avoid their use in acidic, basic, organic environments or in solvents, as well as in water or oil. Furthermore, they can damage data on magnetic cards and hard drives, although data deletion using a neodymium magnet is not always certain.
Regarding the purchase of cylindrical neodymium magnets, many companies 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's always worth visit the website for the current information as well as promotions, and before visiting, please call.
Although, cylindrical neodymium magnets are very practical in many applications, they can also constitute certain dangers. Because of their significant magnetic power, they can attract metallic objects with significant force, which can lead to damaging skin as well as other materials, especially be careful with fingers. One should not use neodymium magnets near equipment 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 e.g., nickel layer. Generally, although they are very useful, they should be handled carefully.
Neodymium magnets, with the formula neodymium-iron-boron, are currently the strong magnets on the market. They are produced through a advanced sintering process, which involves fusing special alloys of neodymium with other metals and then shaping and thermal processing. Their unmatched 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 coated with coatings, such as nickel, to shield them from external factors and extend their lifespan. 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 dangers, it is important to avoid using neodymium magnets in acidic conditions, 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.
A neodymium magnet of class N50 and N52 is a strong and powerful metallic component with the shape of a cylinder, featuring strong holding power and broad usability. Good price, 24h delivery, stability and multi-functionality.

Advantages as well as disadvantages of neodymium magnets NdFeB.

In addition to their long-term stability, neodymium magnets provide the following advantages:

  • They have constant strength, and over around 10 years their performance decreases symbolically – ~1% (according to theory),
  • They protect against demagnetization induced by ambient electromagnetic environments effectively,
  • In other words, due to the shiny nickel coating, the magnet obtains an professional appearance,
  • The outer field strength of the magnet shows advanced magnetic properties,
  • With the right combination of compounds, they reach increased thermal stability, enabling operation at or above 230°C (depending on the structure),
  • The ability for custom shaping and customization to individual needs – neodymium magnets can be manufactured in a wide range of shapes and sizes, which enhances their versatility in applications,
  • Wide application in new technology industries – they are used in computer drives, rotating machines, medical equipment along with technologically developed systems,
  • Thanks to their efficiency per volume, small magnets offer high magnetic performance, with minimal size,

Disadvantages of rare earth magnets:

  • They can break when subjected to a heavy impact. If the magnets are exposed to external force, they should be placed in a protective case. The steel housing, in the form of a holder, protects the magnet from cracks and enhances its overall strength,
  • Magnets lose field strength when exposed to temperatures exceeding 80°C. In most cases, this leads to irreversible magnetic decay (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,
  • Due to corrosion risk in humid conditions, it is advisable to use sealed magnets made of protective material for outdoor use,
  • The use of a protective casing or external holder is recommended, since machining fine details in neodymium magnets is not feasible,
  • Possible threat related to magnet particles may arise, especially if swallowed, which is notable in the protection of children. Furthermore, miniature parts from these magnets may hinder health screening if inside the body,
  • Due to expensive raw materials, their cost is relatively high,

Be Cautious with Neodymium Magnets

Neodymium magnets can become demagnetized 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.

People with pacemakers are advised to avoid neodymium magnets.

In the case of neodymium magnets, there is a strong magnetic field. As a result, it interferes 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.

Avoid bringing neodymium magnets close to a phone or GPS.

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

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

Magnets will attract each other within a distance of several to around 10 cm from each other. Remember not to put fingers between magnets or in their path when they attract. Magnets, depending on their size, are able even cut off a finger or alternatively there can be a severe pressure or even a fracture.

Dust and powder from neodymium magnets are highly flammable.

Avoid drilling or mechanical processing of neodymium magnets. If the magnet is crushed into fine powder or dust, it becomes highly flammable.

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

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

Strong fields generated by neodymium magnets can damage magnetic storage media such as floppy disks, credit cards, magnetic ID cards, cassette tapes, video tapes, or other similar devices. In addition, they can damage televisions, VCRs, computer monitors, and CRT displays. You should especially avoid placing neodymium magnets near electronic devices.

Neodymium magnets are highly delicate, they easily fall apart and can become damaged.

Neodymium magnets are extremely delicate, and by joining them in an uncontrolled manner, they will break. 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.

  Neodymium magnets should not be around children.

Neodymium magnets are not toys. Be cautious and make sure no child plays with them. Small magnets can pose a serious choking hazard. If multiple magnets are swallowed, they can attract to each other through the intestinal walls, causing severe injuries, and even death.

Neodymium magnets are the strongest, most remarkable magnets on the planet, and the surprising force between them can surprise you at first.

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

Safety rules!

To illustrate why neodymium magnets are so dangerous, read the article - How dangerous are strong neodymium magnets?.

Dhit sp. z o.o. logo

e-mail: bok@dhit.pl

tel: +48 888 99 98 98