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neodymium magnets

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Magnet for treasure hunters F400 GOLD

Where to purchase strong neodymium magnet? Magnetic holders in airtight, solid enclosure are ideally suited for use in challenging weather, including during snow and rain more information...

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UMP 75x25 [M10x3] GW F200 GOLD DUAL / N42 - search holder

search holder

Catalog no 210452

GTIN: 5906301814122

5

Diameter Ø [±0,1 mm]

75 mm

Height [±0,1 mm]

25 mm

Weight

1800 g

Load capacity

601 kg / 5893.8 N

Coating

[NiCuNi] nickel

245.00 with VAT / pcs + price for transport

199.19 ZŁ net + 23% VAT / pcs

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UMP 75x25 [M10x3] GW F200 GOLD DUAL / N42 - search holder

Specification/characteristics UMP 75x25 [M10x3] GW F200 GOLD DUAL / N42 - search holder
properties
values
Cat. no.
210452
GTIN
5906301814122
Production/Distribution
Dhit sp. z o.o.
Country of origin
Poland / China / Germany
Customs code
85059029
Diameter Ø
75 mm [±0,1 mm]
Height
25 mm [±0,1 mm]
Weight
1800 g [±0,1 mm]
Load capacity ~ ?
601 kg / 5893.8 N
Coating
[NiCuNi] nickel
Manufacturing Tolerance
± 0.1 mm

Magnetic properties of material N42

properties
values
units
coercivity bHc ?
860-955
kA/m
coercivity bHc ?
10.8-12.0
kOe
energy density [Min. - Max.] ?
318-334
BH max KJ/m
energy density [Min. - Max.] ?
40-42
BH max MGOe
remenance Br [Min. - Max.] ?
12.9-13.2
kGs
remenance Br [Min. - Max.] ?
1290-1320
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

For exploring rivers and lakes, we recommend UMP 75x25 [M10x3] GW F200 GOLD DUAL / N42, which is exceptionally strong and has an impressive magnetic pulling force of approximately ~601 kg. This model is ideal for retrieving metal objects at the bottom of water bodies.
Magnetic holders are highly effective for retrieving in water due to their powerful strength. UMP 75x25 [M10x3] GW F200 GOLD DUAL / N42 weighing 1800 grams with a pulling force of ~601 kg is a perfect solution for finding lost treasures.
When choosing a magnet for underwater searches, you should pay attention to the number of Gauss or Tesla value, which determines the lifting force. UMP 75x25 [M10x3] GW F200 GOLD DUAL / N42 has a pulling force of approximately ~601 kg, making it a powerful tool for retrieving heavier items. Remember that the maximum strength is achieved with the upper holder, while the side attachment offers only 10%-25% of that power.
The sideways force of a magnet is typically lower than the adhesive force because it depends on the fraction of the magnetic field that interacts with the metal surface. In the case of UMP 75x25 [M10x3] GW F200 GOLD DUAL / N42 with a pulling force of ~601 kg, maximum power are achieved with the upper holder, while the side attachment offers only 10%-25% of the stated power.
he attraction force was measured under test conditions, using a smooth S235 low-carbon steel plate with a thickness of 10 mm, with the application of pulling force in a vertical manner. In a situation where the force acts parallelly, the magnet's attraction force can be five times lower! Any gap between the magnet and the plate can result in a reduction in the lifting force.
magnetic pot strength F200 GOLD F300 GOLD

Advantages and disadvantages of neodymium magnets NdFeB.

Besides their stability, neodymium magnets are valued for these benefits:

  • They do not lose their even during around 10 years – the decrease of lifting capacity is only ~1% (based on measurements),
  • They show exceptional resistance to demagnetization from outside magnetic sources,
  • The use of a polished silver surface provides a refined finish,
  • They possess intense magnetic force measurable at the magnet’s surface,
  • With the right combination of materials, they reach increased thermal stability, enabling operation at or above 230°C (depending on the structure),
  • Thanks to the possibility in shaping and the capability to adapt to specific requirements, neodymium magnets can be created in various configurations, which increases their application range,
  • Significant impact in new technology industries – they find application in data storage devices, rotating machines, healthcare devices and high-tech tools,
  • Compactness – despite their small size, they provide high effectiveness, making them ideal for precision applications

Disadvantages of NdFeB magnets:

  • They may fracture when subjected to a powerful impact. If the magnets are exposed to physical collisions, it is advisable to use in a protective case. The steel housing, in the form of a holder, protects the magnet from fracture while also strengthens its overall resistance,
  • High temperatures may significantly reduce the holding force of neodymium magnets. Typically, above 80°C, they experience permanent deterioration in performance (depending on height). 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 moist environment. For outdoor use, we recommend using waterproof magnets, such as those made of rubber,
  • Using a cover – such as a magnetic holder – is advised due to the difficulty in manufacturing fine shapes directly in the magnet,
  • Safety concern related to magnet particles may arise, especially if swallowed, which is important in the protection of children. Moreover, miniature parts from these assemblies can complicate medical imaging after being swallowed,
  • In cases of mass production, neodymium magnet cost is a challenge,

Precautions

Neodymium magnets should not be near 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 can become demagnetized at high temperatures.

Although magnets have demonstrated their effectiveness up to 80°C or 175°F, the temperature can vary depending on the type, shape, and intended use of the specific magnet.

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

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. Avoid placing neodymium magnets in close proximity to electronic 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.

Neodymium magnets will bounce and clash together within a radius of several to around 10 cm from each other.

If you have a nickel allergy, avoid contact with neodymium magnets.

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 magnets are the most powerful magnets ever created, and their strength can surprise you.

To handle magnets properly, it is best to familiarize yourself with our information beforehand. This will help you avoid significant harm to your body and the magnets themselves.

Magnets made of neodymium are especially fragile, which leads to damage.

Neodymium magnets are fragile and will shatter if allowed to collide with each other, even from a distance of a few centimeters. Despite being made of metal and coated with a shiny nickel plating, they are not as hard as steel. 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.

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.

Avoid bringing neodymium magnets close to a phone or GPS.

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

 It is essential to keep neodymium magnets away from youngest children.

Not all neodymium magnets are toys, so do not let children play with them. In the case of small magnets, they can be swallowed and cause choking. In such cases, the only solution is to undergo surgery to remove the magnets, and otherwise, it can even lead to death.

Caution!

To raise awareness of why neodymium magnets are so dangerous, read the article titled How very dangerous are very powerful neodymium magnets?.

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