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neodymium magnets

We offer yellow color magnets Nd2Fe14B - our store's offer. All "magnets" in our store are available for immediate purchase (see the list). See the magnet pricing for more details check the magnet price list

Magnets for water searching F400 GOLD

Where to purchase powerful neodymium magnet? Magnet holders in airtight and durable steel enclosure are excellent for use in difficult, demanding weather conditions, including in the rain and snow see

magnets with holders

Magnetic holders can be applied to enhance production, underwater exploration, or searching for space rocks made of ore check...

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Dhit sp. z o.o.
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BM 550x180x70 [4x M8] - magnetic beam

magnetic beam

Catalog no 090221

GTIN: 5906301812562

5

length

550 mm [±1 mm]

Width

180 mm [±1 mm]

Height

70 mm [±1 mm]

Weight

35320 g

5708.18 with VAT / pcs + price for transport

4640.80 ZŁ net + 23% VAT / pcs

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BM 550x180x70 [4x M8] - magnetic beam
Specification/characteristics BM 550x180x70 [4x M8] - magnetic beam
properties
values
Cat. no.
090221
GTIN
5906301812562
Production/Distribution
Dhit sp. z o.o.
Country of origin
Poland / China / Germany
Customs code
85059029
length
550 mm [±1 mm]
Width
180 mm [±1 mm]
Height
70 mm [±1 mm]
Weight
35320 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. It can also be mounted in a gravity channel down which raw material falls. Ensures high quality of the final product in plastic recycling, wood, and the food industry.
Ferrite separators are characterized by a deep, penetrating magnetic field. We recommend them for protecting machines against large, heavy scrap (so-called tramp iron). 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 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. The product meets standards for the food industry (HACCP/IFS/BRC).
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. To facilitate, a cleaning overlay (dump drawer) can be used, which we offer as an option.
Yes, we are a manufacturer and make plate separators to any size. We adjust length, width, and mounting hole arrangement (eyes, threads). Contact us to receive a free quote and technical drawing.

Pros as well as cons of rare earth magnets.

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

  • They virtually do not lose power, because even after ten years the decline in efficiency is only ~1% (in laboratory conditions),
  • They feature excellent resistance to magnetic field loss when exposed to external magnetic sources,
  • In other words, due to the smooth layer of gold, the element gains a professional look,
  • Magnets are characterized by impressive magnetic induction on the active area,
  • Due to their durability and thermal resistance, neodymium magnets can operate (depending on the shape) even at high temperatures reaching 230°C or more...
  • Due to the potential of accurate forming and adaptation to specialized requirements, neodymium magnets can be produced in a variety of shapes and sizes, which increases their versatility,
  • Universal use in high-tech industry – they are utilized in HDD drives, brushless drives, diagnostic systems, as well as multitasking production systems.
  • Thanks to their power density, small magnets offer high operating force, occupying minimum space,

Characteristics of disadvantages of neodymium magnets: weaknesses and usage proposals

  • At very strong impacts they can crack, therefore we recommend placing them in special holders. A metal housing provides additional protection against damage, as well as increases the magnet's durability.
  • Neodymium magnets lose their force under the influence of heating. As soon as 80°C is exceeded, many of them start losing their power. Therefore, we recommend our special magnets marked [AH], which maintain stability even at temperatures up to 230°C
  • They oxidize in a humid environment - during use outdoors we advise using waterproof magnets e.g. in rubber, plastic
  • We suggest a housing - magnetic holder, due to difficulties in producing threads inside the magnet and complex shapes.
  • Potential hazard resulting from small fragments of magnets pose a threat, if swallowed, which becomes key in the aspect of protecting the youngest. Furthermore, small components of these devices are able to complicate diagnosis medical when they are in the body.
  • High unit price – neodymium magnets have a higher price than other types of magnets (e.g. ferrite), which increases costs of application in large quantities

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

Information about lifting capacity was determined for the most favorable conditions, including:

  • using a sheet made of mild steel, serving as a ideal flux conductor
  • whose transverse dimension equals approx. 10 mm
  • with an polished contact surface
  • with direct contact (without impurities)
  • during pulling in a direction vertical to the plane
  • at conditions approx. 20°C

Practical lifting capacity: influencing factors

Please note that the application force may be lower influenced by the following factors, starting with the most relevant:

  • Distance (between the magnet and the metal), since even a microscopic distance (e.g. 0.5 mm) can cause a decrease in lifting capacity by up to 50% (this also applies to paint, corrosion or dirt).
  • Angle of force application – highest force is available only during pulling at a 90° angle. The resistance to sliding of the magnet along the surface is typically many times lower (approx. 1/5 of the lifting capacity).
  • Substrate thickness – to utilize 100% power, the steel must be adequately massive. Paper-thin metal restricts the lifting capacity (the magnet "punches through" it).
  • Chemical composition of the base – low-carbon steel gives the best results. Higher carbon content reduce magnetic permeability and lifting capacity.
  • Surface finish – ideal contact is obtained only on smooth steel. Any scratches and bumps reduce the real contact area, weakening the magnet.
  • Temperature – heating the magnet results in weakening of force. It is worth remembering the maximum operating temperature for a given model.

* Lifting capacity was determined using a polished steel plate of optimal thickness (min. 20 mm), under perpendicular detachment force, however under parallel forces the lifting capacity is smaller. In addition, even a minimal clearance {between} the magnet and the plate decreases the lifting capacity.

H&S for magnets

Precision electronics

GPS units and mobile phones are extremely sensitive to magnetic fields. Direct contact with a powerful NdFeB magnet can ruin the internal compass in your phone.

Do not overheat magnets

Avoid heat. NdFeB magnets are sensitive to temperature. If you need resistance above 80°C, ask us about HT versions (H, SH, UH).

Pinching danger

Big blocks can crush fingers instantly. Under no circumstances put your hand between two strong magnets.

Health Danger

Patients with a ICD must keep an absolute distance from magnets. The magnetic field can interfere with the functioning of the life-saving device.

Dust is flammable

Drilling and cutting of neodymium magnets carries a risk of fire hazard. Magnetic powder reacts violently with oxygen and is difficult to extinguish.

Danger to the youngest

Strictly store magnets out of reach of children. Choking hazard is high, and the effects of magnets clamping inside the body are life-threatening.

Skin irritation risks

Nickel alert: The Ni-Cu-Ni coating contains nickel. If an allergic reaction happens, cease handling magnets and use protective gear.

Respect the power

Before starting, check safety instructions. Sudden snapping can destroy the magnet or injure your hand. Think ahead.

Beware of splinters

Protect your eyes. Magnets can explode upon uncontrolled impact, ejecting shards into the air. Eye protection is mandatory.

Threat to electronics

Data protection: Strong magnets can damage data carriers and sensitive devices (heart implants, hearing aids, timepieces).

Security!

More info about hazards in the article: Magnet Safety Guide.

Dhit sp. z o.o.

e-mail: bok@dhit.pl

tel: +48 888 99 98 98