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neodymium magnets

We offer blue color magnets Nd2Fe14B - our proposal. All magnesy neodymowe in our store are available for immediate delivery (see the list). Check out the magnet pricing for more details check the magnet price list

Magnet for water searching F200 GOLD

Where to purchase powerful neodymium magnet? Holders with magnets in airtight and durable steel casing are perfect for use in variable and difficult weather conditions, including during snow and rain see...

magnets with holders

Magnetic holders can be applied to facilitate manufacturing, exploring underwater areas, or locating meteorites from gold read...

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UMH 25x8x45 [M5] / N38 - magnetic holder with hook

magnetic holder with hook

Catalog no 310426

GTIN: 5906301814559

5

Diameter Ø [±0,1 mm]

25 mm

Height [±0,1 mm]

45 mm

Height [±0,1 mm]

8 mm

Weight

33 g

Magnetization Direction

↑ axial

Load capacity

25 kg / 245.17 N

Coating

[NiCuNi] nickel

14.49 with VAT / pcs + price for transport

11.78 ZŁ net + 23% VAT / pcs

bulk discounts:

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UMH 25x8x45 [M5] / N38 - magnetic holder with hook

Specification/characteristics UMH 25x8x45 [M5] / N38 - magnetic holder with hook
properties
values
Cat. no.
310426
GTIN
5906301814559
Production/Distribution
Dhit sp. z o.o.
Country of origin
Poland / China / Germany
Customs code
85059029
Diameter Ø
25 mm [±0,1 mm]
Height
45 mm [±0,1 mm]
Height
8 mm [±0,1 mm]
Weight
33 g [±0,1 mm]
Magnetization Direction
↑ axial
Load capacity ~ ?
25 kg / 245.17 N
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

Advantages and disadvantages of neodymium magnets NdFeB.

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

  • They virtually do not lose strength, because even after ten years, the performance loss is only ~1% (in laboratory conditions),
  • They remain magnetized despite exposure to strong external fields,
  • The use of a decorative gold surface provides a smooth finish,
  • They exhibit extremely high levels of magnetic induction near the outer area of the magnet,
  • These magnets tolerate high temperatures, often exceeding 230°C, when properly designed (in relation to profile),
  • Thanks to the flexibility in shaping and the capability to adapt to specific requirements, neodymium magnets can be created in diverse shapes and sizes, which increases their usage potential,
  • Key role in modern technologies – they serve a purpose in hard drives, electric drives, clinical machines and other advanced devices,
  • Compactness – despite their small size, they provide high effectiveness, making them ideal for precision applications

Disadvantages of rare earth magnets:

  • They are fragile when subjected to a heavy impact. If the magnets are exposed to external force, it is suggested to place them in a protective enclosure. The steel housing, in the form of a holder, protects the magnet from breakage , and at the same time reinforces its overall resistance,
  • Magnets lose pulling force when exposed to temperatures exceeding 80°C. In most cases, this leads to irreversible power drop (influenced by the magnet’s form). To address this, we provide [AH] models with superior thermal resistance, able to operate even at 230°C or more,
  • Magnets exposed to moisture can corrode. Therefore, for outdoor applications, we suggest waterproof types made of rubber,
  • The use of a protective casing or external holder is recommended, since machining fine details in neodymium magnets is risky,
  • Possible threat linked to microscopic shards may arise, if ingested accidentally, which is notable in the health of young users. Furthermore, tiny components from these magnets might disrupt scanning when ingested,
  • Higher purchase price is an important factor to consider compared to ceramic magnets, especially in budget-sensitive applications

Safety Precautions

You should maintain neodymium magnets at a safe distance from the wallet, computer, and TV.

Strong magnetic fields emitted by neodymium magnets can damage 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. You should especially avoid placing neodymium magnets near electronic devices.

 Keep neodymium magnets away from youngest children.

Neodymium magnets are not toys. You cannot allow them to become toys for children. In such a situation, surgery is necessary to remove them. In the worst case scenario, it can result in death.

Avoid contact with neodymium magnets if you have a nickel 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.

Keep neodymium magnets as far away as possible from GPS and smartphones.

Magnetic fields interfere with compasses and magnetometers used in navigation for air and sea transport, as well as internal compasses of smartphones and GPS devices.

Neodymium magnets can become demagnetized 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 are primarily characterized by their significant internal force. They attract to each other, and any object that comes in their way will be affected.

Magnets will jump and also clash together within a radius of several to almost 10 cm from each other.

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.

Comparing neodymium magnets to ferrite magnets (found in speakers), they are 10 times stronger, and their strength can shock 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 are not recommended for people with pacemakers.

Neodymium magnets produce strong magnetic fields that can interfere with the operation of a heart pacemaker. However, if the magnetic field does not affect the device, it can damage its components or deactivate the device when it is in a magnetic field.

Neodymium magnets are fragile as well as can easily crack as well as shatter.

In the event of a collision between two neodymium magnets, it can result in them getting chipped. They are coated with a shiny nickel plating similar to steel, but they are not as hard. In the case of a collision between two magnets, there can be a scattering of small sharp metal fragments in different directions. Protecting your eyes is essential.

Pay attention!

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

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tel: +48 888 99 98 98