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neodymium magnets

We offer blue color magnetic Nd2Fe14B - our offer. All "neodymium magnets" on our website are in stock for immediate delivery (see the list). Check out the magnet pricing for more details see the magnet price list

Magnet for treasure hunters F200 GOLD

Where to buy powerful neodymium magnet? Magnet holders in airtight, solid steel casing are excellent for use in challenging weather conditions, including during snow and rain read...

magnets with holders

Magnetic holders can be used to improve manufacturing, underwater discoveries, or locating space rocks made of ore see more...

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UMP 94x28 [3xM10] GW F300 GOLD / N38 - search holder

search holder

Catalog no 210447

GTIN: 5906301814115

5

Diameter Ø [±0,1 mm]

94 mm

Height [±0,1 mm]

28 mm

Weight

1600 g

Load capacity

330 kg / 3236.19 N

Coating

[NiCuNi] nickel

200.00 with VAT / pcs + price for transport

162.60 ZŁ net + 23% VAT / pcs

bulk discounts:

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Parameters as well as shape of neodymium magnets can be calculated on our magnetic mass calculator.

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UMP 94x28 [3xM10] GW F300 GOLD / N38 - search holder

Specification/characteristics UMP 94x28 [3xM10] GW F300 GOLD / N38 - search holder
properties
values
Cat. no.
210447
GTIN
5906301814115
Production/Distribution
Dhit sp. z o.o.
Country of origin
Poland / China / Germany
Customs code
85059029
Diameter Ø
94 mm [±0,1 mm]
Height
28 mm [±0,1 mm]
Weight
1600 g [±0,1 mm]
Load capacity ~ ?
330 kg / 3236.19 N
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 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 underwater searches, we recommend UMP 94x28 [3xM10] GW F300 GOLD / N38, which is exceptionally strong and has an impressive magnetic pulling force of approximately ~330 kg. This model is perfect for retrieving metal objects at the bottom of water bodies.
Magnetic holders are efficient for retrieving in water environments due to their strong attraction capability. UMP 94x28 [3xM10] GW F300 GOLD / N38 weighing 1600 grams with a pulling force of ~330 kg is a great choice for recovering metallic findings.
When choosing a magnet for underwater searches, you should pay attention to the number of Gauss or Tesla value, which determines the attraction strength. UMP 94x28 [3xM10] GW F300 GOLD / N38 has a pulling force of approximately ~330 kg, making it a effective solution for recovering heavier items. Remember that the full power is achieved with the top attachment, while the side attachment offers only 10%-25% of that power.
The sideways force of a magnetic holder is typically lower than the perpendicular force because it depends on the fraction of the magnetic field that interacts with the metal surface. In the case of UMP 94x28 [3xM10] GW F300 GOLD / N38 with a lifting capacity of ~330 kg, full capabilities are achieved with the top attachment, while the side attachment offers only one-fourth to one-quarter of the stated power.
he Lifting 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 perpendicular manner. In a situation where the sliding occurs, the magnet's attraction force can be 5x 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 as well as disadvantages of neodymium magnets NdFeB.

In addition to their pulling strength, neodymium magnets provide the following advantages:

  • They virtually do not lose strength, because even after 10 years, the performance loss is only ~1% (based on calculations),
  • They show superior resistance to demagnetization from outside magnetic sources,
  • By applying a bright layer of nickel, the element gains a sleek look,
  • They exhibit elevated levels of magnetic induction near the outer area of the magnet,
  • They are suitable for high-temperature applications, operating effectively at 230°C+ due to advanced heat resistance and form-specific properties,
  • With the option for tailored forming and personalized design, these magnets can be produced in various shapes and sizes, greatly improving engineering flexibility,
  • Important function in cutting-edge sectors – they are utilized in computer drives, rotating machines, diagnostic apparatus along with other advanced devices,
  • Thanks to their power density, small magnets offer high magnetic performance, with minimal size,

Disadvantages of magnetic elements:

  • They are fragile when subjected to a powerful impact. If the magnets are exposed to external force, we recommend in a steel housing. The steel housing, in the form of a holder, protects the magnet from cracks , and at the same time increases its overall resistance,
  • High temperatures may significantly reduce the field efficiency of neodymium magnets. Typically, above 80°C, they experience permanent weakening in performance (depending on shape). 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 sealed magnets, such as those made of polymer,
  • Limited ability to create threads in the magnet – the use of a external casing is recommended,
  • Health risk linked to microscopic shards may arise, especially if swallowed, which is notable in the protection of children. It should also be noted that minuscule fragments from these devices can disrupt scanning when ingested,
  • Due to the price of neodymium, their cost is considerably higher,

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

The given lifting capacity of the magnet means the maximum lifting force, calculated in ideal conditions, namely:

  • using a steel plate with low carbon content, acting as a magnetic circuit closure
  • of a thickness of at least 10 mm
  • with a refined outer layer
  • in conditions of no clearance
  • in a perpendicular direction of force
  • at room temperature

Practical aspects of lifting capacity – factors

Practical lifting force is dependent on factors, by priority:

  • Air gap between the magnet and the plate, because even a very small distance (e.g. 0.5 mm) causes a drop in lifting force of up to 50%.
  • Direction of applied force, because the maximum lifting capacity is achieved under perpendicular application. The force required to slide the magnet along the plate is usually several times lower.
  • Thickness of the plate, as a plate that is too thin causes part of the magnetic flux not to be used and to remain wasted in the air.
  • Material of the plate, because higher carbon content lowers holding force, while higher iron content increases it. The best choice is steel with high magnetic permeability and high saturation induction.
  • Surface of the plate, because the more smooth and polished it is, the better the contact and consequently the greater the magnetic saturation.
  • Operating temperature, since all permanent magnets have a negative temperature coefficient. This means that at high temperatures they are weaker, while at sub-zero temperatures they become slightly stronger.

* Holding force was checked on a smooth steel plate of 20 mm thickness, when a perpendicular force was applied, whereas under attempts to slide the magnet the holding force is lower. Moreover, even a minimal clearance {between} the magnet’s surface and the plate decreases the load capacity.

Safety Precautions

Neodymium magnets are among the most powerful magnets on Earth. The surprising force they generate between each other can shock you.

Familiarize yourself with our information to correctly handle these magnets and avoid significant injuries to your body and prevent disruption to the magnets.

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

Neodymium magnets generate strong magnetic fields that can damage magnetic media such as floppy disks, video tapes, HDDs, credit cards, magnetic ID cards, cassette tapes, etc. devices. They can also destroy devices like video players, televisions, CRT computer monitors. Remember not to place neodymium magnets close to these electronic devices.

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.

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

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. At the moment of connection between the magnets, tiny sharp metal fragments can be propelled in various directions at high speed. Eye protection is recommended.

People with pacemakers are advised to avoid neodymium magnets.

Neodymium magnets produce strong magnetic fields that can interfere 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.

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.

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 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 will bounce and also clash together within a distance of several to around 10 cm from each other.

The magnet coating contains nickel, so be cautious 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, you can try wearing gloves or simply avoid direct contact with nickel-plated neodymium magnets.

  Magnets should not be treated as toys. Therefore, it is not recommended for youngest children to have access to them.

Remember that neodymium magnets are not toys. Do not allow children to play 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 significant injuries, and even death.

Safety precautions!

So that know how powerful neodymium magnets are and why they are so dangerous, see the article - Dangerous powerful neodymium magnets.

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e-mail: bok@dhit.pl

tel: +48 888 99 98 98