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BM 550x180x70 [4x M8] - magnetic beam

magnetic beam

Catalog no 090221

GTIN/EAN: 5906301812562

5.00
length
550 mm [±1 mm]
Width
180 mm [±1 mm]
Height
70 mm [±1 mm]
Weight
35320 g

How we measure these parameters — certificates and measurements

see parameters »

4640.80 zł net / pcs

5708.18 zł with VAT (23% VAT) / pcs

price for transport

bulk discounts:

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Quantity
Net
Gross
price from 1 pcs
4640.80 zł
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price from 5 pcs
4362.35 zł
5365.69 zł

Frequently asked questions

Which rod should I choose for fine contamination?
For particles below 0.5 mm — a Ø32 mm rod in grade N52, with surface induction of about 10,000 Gs. A Ø25 rod in grade N42 gives about 6,500 Gs and is chosen for contamination above 1 mm: bolts, washers, pieces of wire.
Which rod pitch should I choose?
The narrow pitch, 40 mm centre to centre, for fine free-flowing fractions — it gives denser coverage of the cross-section. The wide pitch, 50 mm, for granulates and for damp, greasy or sticky materials, where a narrow pitch risks the material bridging above the rods.
Why does efficiency drop after a few weeks of operation?
Almost always because the separator has not been cleaned. The layer of captured particles shields the field, and further particles settle on that layer rather than on the rod surface, where the gradient is far stronger. The magnets themselves do not weaken at that rate.

Guides from the knowledge base

Want to talk magnets?

Call us now +48 888 99 98 98 alternatively let us know using contact form the contact section.
Specifications and structure of a neodymium magnet can be estimated using our power calculator.

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Technical details - BM 550x180x70 [4x M8] - magnetic beam

Specification / characteristics - BM 550x180x70 [4x M8] - magnetic beam

properties
properties values
Cat. no. 090221
GTIN/EAN 5906301812562
Production/Distribution Dhit sp. z o.o.
ul. Zielona 14 05-850 Ożarów Mazowiecki PL
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

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 310 °C
Curie Temperature TF 590 °F
Specific resistance 150 μΩ⋅cm
Bending strength 250 MPa
Compressive strength 1000~1100 MPa
Thermal expansion parallel (∥) to orientation (M) (3-4) x 10-6 °C-1
Thermal expansion perpendicular (⊥) to orientation (M) -(1-3) x 10-6 °C-1
Young's modulus 1.7 x 104 kg/mm²
Technical specification and ecology

Chemical composition

iron (Fe) 64% – 68%
neodymium (Nd) 29% – 32%
boron (B) 1.1% – 1.2%
dysprosium (Dy) 0.5% – 2.0%
coating (Ni-Cu-Ni) < 0.05%

Ecology and recycling (GPSR)

recyclability (EoL) 100%
recycled raw materials ~10% (pre-cons)
carbon footprint low / zredukowany
waste code (EWC) 16 02 16
Safety card (GPSR)
responsible entity
Dhit sp. z o.o.
ul. Kościuszki 6A, 05-850 Ożarów Mazowiecki
tel: +48 22 499 98 98 | e-mail: bok@dhit.pl
batch number/type
id: 090221-2026
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A magnetic beam (plate separator) is a powerful industrial magnet in a stainless steel housing. 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. Neodymiums are unrivaled in catching fine filings, wires, and small screws. The decision should be made based on the type of separated material and cleanliness requirements.
We make our magnetic beams entirely of acid-resistant steel AISI 304 or 316 (on request). Thanks to this, the device is waterproof, dustproof, and very durable. 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. Optionally, we offer systems facilitating cleaning (Extra Clean), which speed up maintenance.
We can produce a magnetic block perfectly matched to your installation and requirements. We design separators according to the orderer's requirements, taking into account material specifics. Send us dimensions of your conveyor belt and type of raw material, and we will select the appropriate solution.

Pros as well as cons of Nd2Fe14B magnets.

Benefits

Apart from their superior magnetism, neodymium magnets have these key benefits:
  • Their strength is maintained, and after around 10 years it decreases only by ~1% (according to research),
  • They possess excellent resistance to weakening of magnetic properties when exposed to opposing magnetic fields,
  • The use of an aesthetic layer of noble metals (nickel, gold, silver) causes the element to look better,
  • They are known for high magnetic induction at the operating surface, which improves attraction properties,
  • Through (adequate) combination of ingredients, they can achieve high thermal resistance, enabling action at temperatures approaching 230°C and above...
  • Thanks to the possibility of accurate molding and customization to unique projects, NdFeB magnets can be modeled in a broad palette of geometric configurations, which makes them more universal,
  • Fundamental importance in modern technologies – they are commonly used in HDD drives, electric motors, advanced medical instruments, and industrial machines.
  • Compactness – despite small sizes they provide effective action, making them ideal for precision applications

Limitations

Characteristics of disadvantages of neodymium magnets: application proposals
  • 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 protects them against impacts but also increases their durability
  • Neodymium magnets lose 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 stability even at temperatures up to 230°C
  • 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 prevent oxidation and corrosion.
  • We recommend casing - magnetic mount, due to difficulties in realizing threads inside the magnet and complex shapes.
  • Health risk resulting from small fragments of magnets pose a threat, in case of ingestion, which gains importance in the aspect of protecting the youngest. It is also worth noting that tiny parts of these products can complicate diagnosis medical when they are in the body.
  • Due to complex production process, their price is higher than average,

Pull force analysis

Maximum lifting force for a neodymium magnet – what contributes to it?

Magnet power was determined for the most favorable conditions, including:
  • using a plate made of mild steel, functioning as a ideal flux conductor
  • possessing a massiveness of minimum 10 mm to ensure full flux closure
  • characterized by lack of roughness
  • under conditions of no distance (metal-to-metal)
  • during detachment in a direction vertical to the plane
  • in neutral thermal conditions

Practical aspects of lifting capacity – factors

Effective lifting capacity impacted by working environment parameters, mainly (from priority):
  • Distance (between the magnet and the plate), since even a tiny clearance (e.g. 0.5 mm) can cause a reduction in force by up to 50% (this also applies to paint, rust or dirt).
  • Pull-off angle – remember that the magnet holds strongest perpendicularly. Under shear forces, the capacity drops drastically, often to levels of 20-30% of the nominal value.
  • Element thickness – for full efficiency, the steel must be adequately massive. Paper-thin metal restricts the lifting capacity (the magnet "punches through" it).
  • Metal type – different alloys attracts identically. High carbon content worsen the interaction with the magnet.
  • Surface finish – full contact is obtained only on polished steel. Rough texture reduce the real contact area, reducing force.
  • Thermal factor – high temperature weakens magnetic field. Too high temperature can permanently damage the magnet.

Lifting capacity testing was conducted on a smooth plate of suitable thickness, under perpendicular forces, whereas under parallel forces the load capacity is reduced by as much as 5 times. In addition, even a slight gap between the magnet and the plate decreases the holding force.

Warnings
Adults only

Neodymium magnets are not toys. Accidental ingestion of a few magnets may result in them attracting across intestines, which constitutes a severe health hazard and requires immediate surgery.

Nickel allergy

Medical facts indicate that the nickel plating (standard magnet coating) is a strong allergen. If you have an allergy, avoid direct skin contact or opt for versions in plastic housing.

Dust explosion hazard

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

Physical harm

Pinching hazard: The pulling power is so great that it can cause hematomas, pinching, and broken bones. Protective gloves are recommended.

Life threat

People with a heart stimulator should keep an absolute distance from magnets. The magnetic field can disrupt the functioning of the implant.

Do not overheat magnets

Regular neodymium magnets (N-type) lose power when the temperature exceeds 80°C. This process is irreversible.

Keep away from computers

Avoid bringing magnets near a purse, laptop, or TV. The magnetism can irreversibly ruin these devices and erase data from cards.

Magnet fragility

Despite metallic appearance, the material is delicate and not impact-resistant. Do not hit, as the magnet may crumble into sharp, dangerous pieces.

Precision electronics

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

Powerful field

Use magnets consciously. Their powerful strength can shock even experienced users. Be vigilant and respect their power.

Warning! More info about risks in the article: Magnet Safety Guide.