e-mail: bok@dhit.pl

neodymium magnets

We offer yellow color magnetic Nd2Fe14B - our proposal. Practically all magnesy in our store are in stock for immediate delivery (see the list). Check out the magnet pricing for more details see the magnet price list

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BM 380x180x70 [4x M8] - magnetic beam

magnetic beam

Catalog no 090218

GTIN: 5906301812531

5

length [±0,1 mm]

380 mm

Width [±0,1 mm]

180 mm

Height [±0,1 mm]

70 mm

Weight

24400 g

4185.08 with VAT / pcs + price for transport

3402.50 ZŁ net + 23% VAT / pcs

bulk discounts:

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price from 1 pcs
3402.50 ZŁ
4185.08 ZŁ
price from 5 pcs
3198.35 ZŁ
3933.97 ZŁ

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Strength as well as appearance of a neodymium magnet can be tested with our modular calculator.

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BM 380x180x70 [4x M8] - magnetic beam
Specification/characteristics BM 380x180x70 [4x M8] - magnetic beam
properties
values
Cat. no.
090218
GTIN
5906301812531
Production/Distribution
Dhit sp. z o.o.
Country of origin
Poland / China / Germany
Customs code
85059029
length
380 mm [±0,1 mm]
Width
180 mm [±0,1 mm]
Height
70 mm [±0,1 mm]
Weight
24400 g [±0,1 mm]
Manufacturing Tolerance
± 0.1 mm

Magnetic properties of material

properties
values
units

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

This separator is tasked with cleaning the product (coal, aggregate, recycling) from steel contaminants. The most common installation place is suspension over the transport belt crosswise or lengthwise. The main goal is to protect crushing machines from destruction and ensure product purity.
Ferrite separators are characterized by a deep, penetrating magnetic field. They work well in initial separation in recycling and mining. Neodymium separators have an extremely strong surface field, but shallower (shorter range). The decision should be made based on the type of separated material and cleanliness requirements.
The separator housing is high-quality stainless steel, welded by TIG method. This ensures full resistance to corrosion, water, and difficult weather conditions. It can be safely used in contact with loose food (flour, sugar, grain).
It is a device operated manually by an operator. Scrap is removed by mechanically moving it to the edge, where the magnetic field is weaker. Optionally, we offer systems facilitating cleaning (Extra Clean), which speed up maintenance.
As a manufacturer, we fulfill individual orders for specific conveyor belt widths. We adjust length, width, and mounting hole arrangement (eyes, threads). Send us dimensions of your conveyor belt and type of raw material, and we will select the appropriate solution.

Advantages as well as disadvantages of rare earth magnets.

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

  • They have unchanged lifting capacity, and over nearly ten years their attraction force decreases symbolically – ~1% (in testing),
  • Neodymium magnets are characterized by exceptionally resistant to magnetic field loss caused by external field sources,
  • Thanks to the glossy finish, the surface of nickel, gold-plated, or silver gives an clean appearance,
  • The surface of neodymium magnets generates a strong magnetic field – this is a distinguishing feature,
  • Through (adequate) combination of ingredients, they can achieve high thermal resistance, allowing for functioning at temperatures approaching 230°C and above...
  • Possibility of accurate creating and adapting to individual applications,
  • Fundamental importance in modern technologies – they are utilized in magnetic memories, electromotive mechanisms, medical devices, as well as technologically advanced constructions.
  • Relatively small size with high pulling force – neodymium magnets offer high power in compact dimensions, which allows their use in small systems

Drawbacks and weaknesses of neodymium magnets: weaknesses and usage proposals

  • They are prone to damage upon too strong impacts. To avoid cracks, it is worth protecting magnets in special housings. Such protection not only protects the magnet but also improves its resistance to damage
  • Neodymium magnets demagnetize when exposed to high temperatures. After reaching 80°C, many of them experience permanent weakening of strength (a factor is the shape and 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 magnets in rubber or plastics, which secure oxidation as well as corrosion.
  • We suggest casing - magnetic mechanism, due to difficulties in producing threads inside the magnet and complex shapes.
  • Health risk resulting from small fragments of magnets are risky, when accidentally swallowed, which becomes key in the context of child health protection. Additionally, tiny parts of these devices can be problematic in diagnostics medical after entering the body.
  • High unit price – neodymium magnets cost more than other types of magnets (e.g. ferrite), which increases costs of application in large quantities

Maximum magnetic pulling forcewhat contributes to it?

Magnet power was determined for the most favorable conditions, assuming:

  • with the contact of a sheet made of special test steel, ensuring full magnetic saturation
  • possessing a thickness of min. 10 mm to ensure full flux closure
  • with a plane perfectly flat
  • with zero gap (without coatings)
  • during pulling in a direction vertical to the plane
  • in neutral thermal conditions

Practical aspects of lifting capacity – factors

Effective lifting capacity is affected by working environment parameters, such as (from priority):

  • Distance – the presence of any layer (rust, tape, gap) acts as an insulator, which lowers power rapidly (even by 50% at 0.5 mm).
  • Pull-off angle – note that the magnet holds strongest perpendicularly. Under shear forces, the holding force drops drastically, often to levels of 20-30% of the maximum value.
  • Metal thickness – thin material does not allow full use of the magnet. Part of the magnetic field passes through the material instead of converting into lifting capacity.
  • Plate material – mild steel attracts best. Alloy steels lower magnetic permeability and holding force.
  • Surface finish – ideal contact is possible only on smooth steel. Any scratches and bumps reduce the real contact area, reducing force.
  • Thermal factor – hot environment reduces magnetic field. Exceeding the limit temperature can permanently damage the magnet.

* Holding force was tested on a smooth steel plate of 20 mm thickness, when the force acted perpendicularly, in contrast under shearing force the holding force is lower. In addition, even a minimal clearance {between} the magnet’s surface and the plate reduces the lifting capacity.

Precautions when working with neodymium magnets

Heat sensitivity

Do not overheat. NdFeB magnets are susceptible to temperature. If you require resistance above 80°C, ask us about HT versions (H, SH, UH).

Medical implants

Individuals with a pacemaker have to keep an absolute distance from magnets. The magnetism can interfere with the operation of the life-saving device.

Beware of splinters

NdFeB magnets are sintered ceramics, which means they are prone to chipping. Clashing of two magnets leads to them breaking into small pieces.

Skin irritation risks

Warning for allergy sufferers: The Ni-Cu-Ni coating contains nickel. If skin irritation occurs, cease handling magnets and wear gloves.

Immense force

Handle with care. Neodymium magnets attract from a long distance and snap with huge force, often faster than you can react.

Dust explosion hazard

Powder created during cutting of magnets is flammable. Do not drill into magnets unless you are an expert.

Keep away from electronics

Be aware: neodymium magnets generate a field that interferes with precision electronics. Maintain a separation from your mobile, tablet, and GPS.

Do not give to children

Strictly store magnets away from children. Ingestion danger is significant, and the consequences of magnets clamping inside the body are fatal.

Electronic hazard

Data protection: Neodymium magnets can ruin payment cards and sensitive devices (pacemakers, medical aids, mechanical watches).

Bodily injuries

Danger of trauma: The pulling power is so immense that it can cause blood blisters, pinching, and even bone fractures. Use thick gloves.

Warning!

Learn more about risks in the article: Magnet Safety Guide.

Dhit sp. z o.o.

e-mail: bok@dhit.pl

tel: +48 888 99 98 98