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neodymium magnets

We provide blue color magnetic Nd2Fe14B - our proposal. All magnesy in our store are in stock for immediate delivery (see the list). See the magnet pricing for more details see 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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price from 1 pcs
5621.90 ZŁ
6914.94 ZŁ
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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

It is a device used to catch unwanted metals from bulk raw materials transported on a belt. It can also be mounted in a gravity channel down which raw material falls. 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 versions are used for precise cleaning of raw material from small particles (food industry, plastics). The decision should be made based on the type of separated material and cleanliness requirements.
The construction is tightly welded from acid-resistant sheet, which guarantees tightness. This guarantees hygiene and ease of cleaning, which is crucial in the food industry. It can be safely used in contact with loose food (flour, sugar, grain).
Removing contaminants is simple but requires periodic stopping of the process or access to the magnet. 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.
We can produce a magnetic block perfectly matched to your installation and requirements. Dimensions and mounting system are agreed with the client at the design stage. Send us dimensions of your conveyor belt and type of raw material, and we will select the appropriate solution.

Pros and cons of rare earth magnets.

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

  • Their magnetic field remains stable, and after approximately 10 years it drops only by ~1% (theoretically),
  • They maintain their magnetic properties even under strong external field,
  • In other words, due to the shiny surface of gold, the element becomes visually attractive,
  • Magnets have exceptionally strong magnetic induction on the working surface,
  • Thanks to resistance to high temperature, they can operate (depending on the form) even at temperatures up to 230°C and higher...
  • Possibility of individual shaping as well as adjusting to complex applications,
  • Key role in electronics industry – they are used in hard drives, electromotive mechanisms, medical equipment, and other advanced devices.
  • Compactness – despite small sizes they provide effective action, making them ideal for precision applications

Disadvantages of NdFeB magnets:

  • Susceptibility to cracking is one of their disadvantages. Upon strong impact they can fracture. We advise keeping them in a special holder, which not only secures them against impacts but also increases their durability
  • Neodymium magnets decrease their power under the influence of heating. As soon as 80°C is exceeded, many of them start losing their force. Therefore, we recommend our special magnets marked [AH], which maintain durability even at temperatures up to 230°C
  • They rust in a humid environment. For use outdoors we recommend using waterproof magnets e.g. in rubber, plastic
  • Limited ability of making nuts in the magnet and complex forms - recommended is casing - magnetic holder.
  • Possible danger resulting from small fragments of magnets are risky, when accidentally swallowed, which becomes key in the aspect of protecting the youngest. Additionally, tiny parts of these magnets are able to complicate diagnosis medical when they are in the body.
  • Due to neodymium price, their price is relatively high,

Maximum lifting capacity of the magnetwhat it depends on?

The specified lifting capacity concerns the peak performance, recorded under ideal test conditions, meaning:

  • using a plate made of low-carbon steel, acting as a circuit closing element
  • whose transverse dimension reaches at least 10 mm
  • with a plane free of scratches
  • with direct contact (no coatings)
  • under vertical force vector (90-degree angle)
  • at ambient temperature approx. 20 degrees Celsius

Practical lifting capacity: influencing factors

Please note that the application force may be lower depending on elements below, starting with the most relevant:

  • Distance (between the magnet and the metal), because even a tiny distance (e.g. 0.5 mm) results in a decrease in lifting capacity by up to 50% (this also applies to paint, corrosion or debris).
  • Loading method – catalog parameter refers to pulling vertically. When applying parallel force, the magnet holds much less (typically approx. 20-30% of nominal force).
  • Substrate thickness – to utilize 100% power, the steel must be adequately massive. Thin sheet limits the attraction force (the magnet "punches through" it).
  • Steel type – low-carbon steel gives the best results. Alloy steels decrease magnetic properties and holding force.
  • Plate texture – ground elements guarantee perfect abutment, which increases field saturation. Rough surfaces reduce efficiency.
  • Thermal conditions – neodymium magnets have a sensitivity to temperature. At higher temperatures they are weaker, and at low temperatures gain strength (up to a certain limit).

* Lifting capacity was measured with the use of a smooth steel plate of optimal thickness (min. 20 mm), under perpendicular detachment force, however under parallel forces the load capacity is reduced by as much as 75%. In addition, even a minimal clearance {between} the magnet’s surface and the plate reduces the lifting capacity.

Safety rules for work with neodymium magnets

Electronic devices

Intense magnetic fields can erase data on payment cards, HDDs, and storage devices. Keep a distance of min. 10 cm.

Beware of splinters

NdFeB magnets are sintered ceramics, which means they are fragile like glass. Collision of two magnets leads to them breaking into shards.

ICD Warning

Health Alert: Strong magnets can turn off heart devices and defibrillators. Stay away if you have electronic implants.

Combustion hazard

Dust generated during cutting of magnets is combustible. Do not drill into magnets without proper cooling and knowledge.

Serious injuries

Watch your fingers. Two large magnets will snap together instantly with a force of massive weight, crushing everything in their path. Exercise extreme caution!

Compass and GPS

Be aware: rare earth magnets generate a field that interferes with sensitive sensors. Keep a separation from your phone, tablet, and navigation systems.

Conscious usage

Exercise caution. Neodymium magnets act from a distance and connect with huge force, often faster than you can react.

Swallowing risk

These products are not suitable for play. Accidental ingestion of several magnets can lead to them connecting inside the digestive tract, which poses a critical condition and requires urgent medical intervention.

Warning for allergy sufferers

Certain individuals experience a hypersensitivity to nickel, which is the standard coating for NdFeB magnets. Extended handling might lead to dermatitis. We recommend use safety gloves.

Permanent damage

Regular neodymium magnets (N-type) lose power when the temperature surpasses 80°C. Damage is permanent.

Warning!

Need more info? Read our article: Are neodymium magnets dangerous?

Dhit sp. z o.o.

e-mail: bok@dhit.pl

tel: +48 888 99 98 98