e-mail: bok@dhit.pl

neodymium magnets

We offer red color magnets Nd2Fe14B - our store's offer. Practically all magnesy on our website are available for immediate purchase (see the list). Check out the magnet price list for more details check the magnet price list

Magnet for fishing F300 GOLD

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MW 8x15 / N38 - cylindrical magnet

cylindrical magnet

Catalog no 010102

GTIN: 5906301811015

5

Diameter Ø [±0,1 mm]

8 mm

Height [±0,1 mm]

15 mm

Weight

5.65 g

Magnetization Direction

↑ axial

Load capacity

6.64 kg / 65.12 N

Magnetic Induction

598.12 mT

Coating

[NiCuNi] nickel

3.44 with VAT / pcs + price for transport

2.80 ZŁ net + 23% VAT / pcs

bulk discounts:

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MW 8x15 / N38 - cylindrical magnet
Specification/characteristics MW 8x15 / N38 - cylindrical magnet
properties
values
Cat. no.
010102
GTIN
5906301811015
Production/Distribution
Dhit sp. z o.o.
Country of origin
Poland / China / Germany
Customs code
85059029
Diameter Ø
8 mm [±0,1 mm]
Height
15 mm [±0,1 mm]
Weight
5.65 g [±0,1 mm]
Magnetization Direction
↑ axial
Load capacity ~ ?
6.64 kg / 65.12 N
Magnetic Induction ~ ?
598.12 mT
Coating
[NiCuNi] nickel
Manufacturing Tolerance
± 0.1 mm

Magnetic properties of material N38

properties
values
units
remenance Br [Min. - Max.] ?
12.2-12.6
kGs
remenance Br [Min. - Max.] ?
1220-1260
T
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 at 20°C

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

The offered product is an incredibly powerful rod magnet, composed of durable NdFeB material, which, with dimensions of Ø8x15 mm, guarantees optimal power. This specific item is characterized by high dimensional repeatability and professional build quality, making it a perfect solution for professional engineers and designers. As a magnetic rod with significant force (approx. 6.64 kg), this product is available off-the-shelf from our warehouse in Poland, ensuring lightning-fast order fulfillment. Moreover, its Ni-Cu-Ni coating effectively protects it against corrosion in typical operating conditions, guaranteeing an aesthetic appearance and durability for years.
This model is ideal for building generators, advanced Hall effect sensors, and efficient magnetic separators, where field concentration on a small surface counts. Thanks to the pull force of 65.12 N with a weight of only 5.65 g, this cylindrical magnet is indispensable in electronics and wherever low weight is crucial.
Due to the brittleness of the NdFeB material, we absolutely advise against force-fitting (so-called press-fit), as this risks immediate cracking of this professional component. To ensure long-term durability in automation, specialized industrial adhesives are used, which are safe for nickel and fill the gap, guaranteeing high repeatability of the connection.
Grade N38 is the most popular standard for industrial neodymium magnets, offering an optimal price-to-power ratio and operational stability. If you need the strongest magnets in the same volume (Ø8x15), contact us regarding higher grades (e.g., N50, N52), however, N38 is the standard in continuous sale in our store.
This model is characterized by dimensions Ø8x15 mm, which, at a weight of 5.65 g, makes it an element with impressive magnetic energy density. The key parameter here is the lifting capacity amounting to approximately 6.64 kg (force ~65.12 N), which, with such compact dimensions, proves the high grade of the NdFeB material. The product has a [NiCuNi] coating, which secures it against external factors, giving it an aesthetic, silvery shine.
This rod magnet is magnetized axially (along the height of 15 mm), which means that the N and S poles are located on the flat, circular surfaces. Such an arrangement is most desirable when connecting magnets in stacks (e.g., in filters) or when mounting in sockets at the bottom of a hole. On request, we can also produce versions magnetized diametrically if your project requires it.

Advantages and disadvantages of rare earth magnets.

Besides their remarkable pulling force, neodymium magnets offer the following advantages:

  • They have stable power, and over more than 10 years their performance decreases symbolically – ~1% (according to theory),
  • Magnets very well defend themselves against demagnetization caused by ambient magnetic noise,
  • In other words, due to the shiny layer of nickel, the element becomes visually attractive,
  • They show high magnetic induction at the operating surface, making them more effective,
  • Neodymium magnets are characterized by extremely high magnetic induction on the magnet surface and are able to act (depending on the shape) even at a temperature of 230°C or more...
  • Thanks to flexibility in designing and the ability to modify to client solutions,
  • Significant place in advanced technology sectors – they find application in hard drives, motor assemblies, medical devices, also complex engineering applications.
  • Compactness – despite small sizes they generate large force, making them ideal for precision applications

Problematic aspects of neodymium magnets: tips and applications.

  • To avoid cracks under impact, we suggest using special steel holders. Such a solution secures the magnet and simultaneously increases its durability.
  • Neodymium magnets decrease their power under the influence of heating. As soon as 80°C is exceeded, many of them start losing their force. Therefore, we recommend our special magnets marked [AH], which maintain stability even at temperatures up to 230°C
  • When exposed to humidity, magnets start to rust. To use them in conditions outside, it is recommended to use protective magnets, such as those in rubber or plastics, which secure oxidation and corrosion.
  • We suggest a housing - magnetic mechanism, due to difficulties in creating nuts inside the magnet and complex shapes.
  • Possible danger related to microscopic parts of magnets are risky, when accidentally swallowed, which becomes key in the aspect of protecting the youngest. Additionally, small components of these magnets can disrupt the diagnostic process medical when they are in the body.
  • With budget limitations the cost of neodymium magnets is a challenge,

Best holding force of the magnet in ideal parameterswhat affects it?

The load parameter shown concerns the maximum value, obtained under laboratory conditions, meaning:

  • with the use of a sheet made of special test steel, ensuring maximum field concentration
  • possessing a massiveness of min. 10 mm to avoid saturation
  • with a plane perfectly flat
  • with zero gap (without coatings)
  • under perpendicular force direction (90-degree angle)
  • at standard ambient temperature

Practical lifting capacity: influencing factors

Please note that the working load may be lower subject to the following factors, in order of importance:

  • Air gap (between the magnet and the plate), as even a microscopic clearance (e.g. 0.5 mm) leads to a decrease in lifting capacity by up to 50% (this also applies to paint, corrosion or dirt).
  • Pull-off angle – remember that the magnet holds strongest perpendicularly. Under shear forces, the holding force drops significantly, often to levels of 20-30% of the nominal value.
  • Plate thickness – insufficiently thick steel does not accept the full field, causing part of the power to be wasted to the other side.
  • Chemical composition of the base – mild steel attracts best. Higher carbon content reduce magnetic permeability and holding force.
  • Surface finish – full contact is possible only on polished steel. Any scratches and bumps reduce the real contact area, weakening the magnet.
  • Thermal factor – high temperature reduces pulling force. Exceeding the limit temperature can permanently demagnetize the magnet.

* Holding force was checked on the plate surface of 20 mm thickness, when a perpendicular force was applied, however under parallel forces the lifting capacity is smaller. Moreover, even a slight gap {between} the magnet’s surface and the plate lowers the lifting capacity.

Precautions when working with neodymium magnets

Fragile material

Watch out for shards. Magnets can explode upon violent connection, launching sharp fragments into the air. Eye protection is mandatory.

Do not underestimate power

Exercise caution. Rare earth magnets act from a distance and connect with massive power, often quicker than you can move away.

This is not a toy

Only for adults. Tiny parts pose a choking risk, leading to intestinal necrosis. Keep out of reach of children and animals.

Permanent damage

Standard neodymium magnets (grade N) lose power when the temperature surpasses 80°C. The loss of strength is permanent.

Flammability

Machining of neodymium magnets poses a fire risk. Neodymium dust oxidizes rapidly with oxygen and is hard to extinguish.

Medical implants

Health Alert: Strong magnets can deactivate heart devices and defibrillators. Stay away if you have electronic implants.

Protect data

Intense magnetic fields can erase data on payment cards, HDDs, and other magnetic media. Stay away of at least 10 cm.

Impact on smartphones

Navigation devices and mobile phones are highly sensitive to magnetism. Direct contact with a strong magnet can ruin the internal compass in your phone.

Avoid contact if allergic

Some people experience a hypersensitivity to nickel, which is the standard coating for NdFeB magnets. Prolonged contact can result in a rash. It is best to wear protective gloves.

Physical harm

Large magnets can break fingers in a fraction of a second. Do not put your hand between two attracting surfaces.

Warning!

Looking for details? Read our article: Are neodymium magnets dangerous?

Dhit sp. z o.o.

e-mail: bok@dhit.pl

tel: +48 888 99 98 98