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neodymium magnets

We offer blue color magnets Nd2Fe14B - our offer. All "neodymium magnets" on our website are available for immediate delivery (check the list). See the magnet price list for more details check the magnet price list

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Where to buy strong neodymium magnet? Magnet holders in airtight and durable enclosure are ideally suited for use in challenging weather conditions, including snow and rain read

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Magnetic holders can be used to facilitate production, exploring underwater areas, or finding meteors made of ore read...

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UMGB 75x28 [M8+M10] GW F200 +Lina GOBLIN / N38 - goblin magnetic holder

goblin magnetic holder

Catalog no 350436

GTIN: 5906301814788

5.00

Diameter Ø

75 mm [±1 mm]

Height

28 mm [±1 mm]

Weight

900 g

Magnetization Direction

↑ axial

Load capacity

280.00 kg / 2745.86 N

Coating

[NiCuNi] Nickel

215.00 with VAT / pcs + price for transport

174.80 ZŁ net + 23% VAT / pcs

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UMGB 75x28 [M8+M10] GW F200 +Lina GOBLIN / N38 - goblin magnetic holder

Specification / characteristics UMGB 75x28 [M8+M10] GW F200 +Lina GOBLIN / N38 - goblin magnetic holder

properties
properties values
Cat. no. 350436
GTIN 5906301814788
Production/Distribution Dhit sp. z o.o.
ul. Zielona 14 05-850 Ożarów Mazowiecki PL
Country of origin Poland / China / Germany
Customs code 85059029
Diameter Ø 75 mm [±1 mm]
Height 28 mm [±1 mm]
Weight 900 g
Magnetization Direction ↑ axial
Load capacity ~ ? 280.00 kg / 2745.86 N
Coating [NiCuNi] Nickel
Manufacturing Tolerance ±1 mm

Magnetic properties of material N38

Specification / characteristics UMGB 75x28 [M8+M10] GW F200 +Lina GOBLIN / N38 - goblin magnetic holder
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

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

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Pros as well as cons of NdFeB magnets.

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

  • They virtually do not lose power, because even after ten years the performance loss is only ~1% (based on calculations),
  • They are noted for resistance to demagnetization induced by presence of other magnetic fields,
  • By applying a lustrous coating of gold, the element gains an proper look,
  • The surface of neodymium magnets generates a intense magnetic field – this is a key feature,
  • Made from properly selected components, these magnets show impressive resistance to high heat, enabling them to function (depending on their shape) at temperatures up to 230°C and above...
  • Considering the potential of precise forming and customization to unique solutions, magnetic components can be manufactured in a variety of forms and dimensions, which expands the range of possible applications,
  • Huge importance in future technologies – they find application in hard drives, electric drive systems, medical equipment, and modern systems.
  • Compactness – despite small sizes they provide effective action, making them ideal for precision applications

Disadvantages of neodymium magnets:

  • They are prone to damage upon too strong impacts. To avoid cracks, it is worth securing magnets using a steel holder. Such protection not only shields the magnet but also improves its resistance to damage
  • Neodymium magnets lose power when exposed to high temperatures. After reaching 80°C, many of them experience permanent weakening of strength (a factor is the shape as well as dimensions of the magnet). We offer magnets specially adapted to work at temperatures up to 230°C marked [AH], which are extremely resistant to heat
  • When exposed to humidity, magnets usually rust. For applications outside, it is recommended to use protective magnets, such as those in rubber or plastics, which prevent oxidation and corrosion.
  • Due to limitations in producing threads and complicated forms in magnets, we propose using cover - magnetic mechanism.
  • Possible danger related to microscopic parts of magnets can be dangerous, if swallowed, which gains importance in the aspect of protecting the youngest. It is also worth noting that small components of these devices can complicate diagnosis medical in case of swallowing.
  • Due to complex production process, their price is higher than average,

Maximum lifting force for a neodymium magnet – what it depends on?

Magnet power was defined for optimal configuration, including:

  • with the contact of a yoke made of special test steel, ensuring full magnetic saturation
  • whose transverse dimension equals approx. 10 mm
  • with an ground touching surface
  • with direct contact (no paint)
  • for force acting at a right angle (pull-off, not shear)
  • in stable room temperature

Determinants of practical lifting force of a magnet

In practice, the real power results from many variables, presented from crucial:

  • Space between surfaces – even a fraction of a millimeter of separation (caused e.g. by veneer or dirt) diminishes the pulling force, often by half at just 0.5 mm.
  • Pull-off angle – note that the magnet holds strongest perpendicularly. Under shear forces, the capacity drops drastically, often to levels of 20-30% of the nominal value.
  • Base massiveness – too thin sheet does not close the flux, causing part of the power to be wasted to the other side.
  • Material type – ideal substrate is pure iron steel. Hardened steels may have worse magnetic properties.
  • Surface structure – the more even the plate, the larger the contact zone and stronger the hold. Roughness creates an air distance.
  • Temperature – heating the magnet causes a temporary drop of force. It is worth remembering the maximum operating temperature for a given model.

* Lifting capacity testing was carried out on plates with a smooth surface of optimal thickness, under perpendicular forces, however under attempts to slide the magnet the lifting capacity is smaller. Additionally, even a slight gap {between} the magnet’s surface and the plate lowers the lifting capacity.

Precautions when working with NdFeB magnets

Finger safety

Mind your fingers. Two powerful magnets will join immediately with a force of several hundred kilograms, destroying anything in their path. Be careful!

Mechanical processing

Combustion risk: Neodymium dust is highly flammable. Do not process magnets without safety gear as this may cause fire.

Metal Allergy

Allergy Notice: The Ni-Cu-Ni coating consists of nickel. If redness happens, immediately stop handling magnets and wear gloves.

Product not for children

Only for adults. Small elements pose a choking risk, causing intestinal necrosis. Store away from kids and pets.

Thermal limits

Standard neodymium magnets (N-type) undergo demagnetization when the temperature goes above 80°C. This process is irreversible.

Safe distance

Avoid bringing magnets close to a purse, computer, or TV. The magnetic field can irreversibly ruin these devices and erase data from cards.

GPS and phone interference

Be aware: rare earth magnets produce a field that confuses precision electronics. Maintain a separation from your mobile, device, and navigation systems.

Warning for heart patients

Health Alert: Neodymium magnets can deactivate heart devices and defibrillators. Do not approach if you have electronic implants.

Fragile material

NdFeB magnets are sintered ceramics, meaning they are fragile like glass. Impact of two magnets will cause them cracking into shards.

Do not underestimate power

Handle with care. Rare earth magnets attract from a distance and snap with huge force, often quicker than you can react.

Important!

Need more info? Check our post: Are neodymium magnets dangerous?

Dhit sp. z o.o.

e-mail: bok@dhit.pl

tel: +48 888 99 98 98