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neodymium magnets

We offer blue color magnets Nd2Fe14B - our proposal. Practically all magnesy neodymowe on our website are in stock for immediate delivery (check the list). See the magnet pricing for more details check the magnet price list

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BM 750x180x70 [4x M8] - magnetic beam

magnetic beam

Catalog no 090223

GTIN: 5906301812586

5

length

750 mm [±1 mm]

Width

180 mm [±1 mm]

Height

70 mm [±1 mm]

Weight

48150 g

6914.94 with VAT / pcs + price for transport

5621.90 ZŁ net + 23% VAT / pcs

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5621.90 ZŁ
6914.94 ZŁ
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Specifications along with structure of neodymium magnets can be tested with our magnetic calculator.

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BM 750x180x70 [4x M8] - magnetic beam
Specification/characteristics BM 750x180x70 [4x M8] - magnetic beam
properties
values
Cat. no.
090223
GTIN
5906301812586
Production/Distribution
Dhit sp. z o.o.
Country of origin
Poland / China / Germany
Customs code
85059029
length
750 mm [±1 mm]
Width
180 mm [±1 mm]
Height
70 mm [±1 mm]
Weight
48150 g
Manufacturing Tolerance
±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 is cheaper and has deeper field penetration, which is good with a thick layer of raw material. They work well in initial separation in recycling and mining. Neodymium separators have an extremely strong surface field, but shallower (shorter range). The choice depends on the size of contaminants and the thickness of the raw material layer on the belt.
We make our magnetic beams entirely of acid-resistant steel AISI 304 or 316 (on request). This ensures full resistance to corrosion, water, and difficult weather conditions. Suitable for chemical, food, and pharmaceutical industries.
It is a device operated manually by an operator. Just drop attracted elements (screws, wires) outside the conveyor belt area. To facilitate, a cleaning overlay (dump drawer) can be used, which we offer as an option.
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 and disadvantages of neodymium magnets.

Besides their high retention, neodymium magnets are valued for these benefits:

  • Their power is durable, and after approximately 10 years it drops only by ~1% (theoretically),
  • They possess excellent resistance to magnetic field loss when exposed to external fields,
  • In other words, due to the smooth finish of gold, the element gains visual value,
  • Neodymium magnets achieve maximum magnetic induction on a small surface, which allows for strong attraction,
  • Through (appropriate) combination of ingredients, they can achieve high thermal resistance, enabling functioning at temperatures reaching 230°C and above...
  • Possibility of precise creating and adjusting to complex conditions,
  • Huge importance in modern technologies – they serve a role in hard drives, electric motors, precision medical tools, and modern systems.
  • Compactness – despite small sizes they offer powerful magnetic field, making them ideal for precision applications

Problematic aspects of neodymium magnets and proposals for their use:

  • At very strong impacts they can crack, therefore we advise placing them in strong housings. A metal housing provides additional protection against damage and increases the magnet's durability.
  • When exposed to high temperature, neodymium magnets experience a drop in strength. Often, when the temperature exceeds 80°C, their strength decreases (depending on the size, as well as shape of the magnet). For those who need magnets for extreme conditions, we offer [AH] versions withstanding up to 230°C
  • When exposed to humidity, magnets start to rust. For applications outside, it is recommended to use protective magnets, such as those in rubber or plastics, which secure oxidation as well as corrosion.
  • Due to limitations in producing nuts and complex shapes in magnets, we propose using cover - magnetic mechanism.
  • Potential hazard related to microscopic parts of magnets pose a threat, when accidentally swallowed, which becomes key in the context of child health protection. Additionally, tiny parts of these devices are able to complicate diagnosis medical after entering the body.
  • With large orders the cost of neodymium magnets is economically unviable,

Detachment force of the magnet in optimal conditionswhat affects it?

The declared magnet strength represents the peak performance, measured under optimal environment, meaning:

  • on a plate made of structural steel, effectively closing the magnetic flux
  • possessing a thickness of min. 10 mm to avoid saturation
  • with a plane free of scratches
  • with direct contact (without impurities)
  • under vertical force direction (90-degree angle)
  • at ambient temperature room level

Magnet lifting force in use – key factors

Please note that the application force will differ influenced by elements below, starting with the most relevant:

  • Gap (betwixt the magnet and the plate), since even a tiny distance (e.g. 0.5 mm) can cause a drastic drop in force by up to 50% (this also applies to paint, corrosion or debris).
  • Force direction – remember that the magnet has greatest strength perpendicularly. Under shear forces, the holding force drops drastically, often to levels of 20-30% of the maximum value.
  • Plate thickness – too thin steel does not accept the full field, causing part of the flux to be escaped into the air.
  • Chemical composition of the base – low-carbon steel gives the best results. Higher carbon content decrease magnetic permeability and holding force.
  • Surface structure – the more even the surface, the better the adhesion and higher the lifting capacity. Roughness acts like micro-gaps.
  • Temperature – heating the magnet results in weakening of force. It is worth remembering the maximum operating temperature for a given model.

* Lifting capacity testing was performed on plates with a smooth surface of optimal thickness, under perpendicular forces, whereas under attempts to slide the magnet the lifting capacity is smaller. Additionally, even a minimal clearance {between} the magnet’s surface and the plate reduces the load capacity.

Warnings

Cards and drives

Device Safety: Neodymium magnets can damage data carriers and sensitive devices (pacemakers, hearing aids, timepieces).

Heat warning

Do not overheat. Neodymium magnets are sensitive to temperature. If you require resistance above 80°C, look for HT versions (H, SH, UH).

Compass and GPS

Remember: rare earth magnets produce a field that disrupts precision electronics. Maintain a safe distance from your mobile, device, and GPS.

Swallowing risk

Neodymium magnets are not toys. Swallowing multiple magnets may result in them connecting inside the digestive tract, which constitutes a direct threat to life and necessitates urgent medical intervention.

Pacemakers

For implant holders: Powerful magnets affect medical devices. Keep minimum 30 cm distance or request help to work with the magnets.

Crushing risk

Large magnets can break fingers in a fraction of a second. Never put your hand between two attracting surfaces.

Combustion hazard

Fire hazard: Neodymium dust is highly flammable. Do not process magnets in home conditions as this risks ignition.

Caution required

Before use, check safety instructions. Uncontrolled attraction can destroy the magnet or injure your hand. Be predictive.

Protective goggles

Protect your eyes. Magnets can fracture upon uncontrolled impact, launching shards into the air. Wear goggles.

Nickel coating and allergies

It is widely known that nickel (standard magnet coating) is a potent allergen. For allergy sufferers, prevent direct skin contact or opt for coated magnets.

Warning!

Looking for details? Read our article: Why are neodymium magnets dangerous?

Dhit sp. z o.o.

e-mail: bok@dhit.pl

tel: +48 888 99 98 98