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BM 850x180x70 [4x M8] - magnetic beam

magnetic beam

Catalog no 090224

GTIN/EAN: 5906301812593

5.00

length

850 mm [±1 mm]

Width

180 mm [±1 mm]

Height

70 mm [±1 mm]

Weight

54590 g

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7729.93 ZŁ with VAT / pcs + price for transport

6284.50 ZŁ net + 23% VAT / pcs

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Weight along with shape of neodymium magnets can be calculated with our our magnetic calculator.

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Technical parameters - BM 850x180x70 [4x M8] - magnetic beam

Specification / characteristics - BM 850x180x70 [4x M8] - magnetic beam

properties
properties values
Cat. no. 090224
GTIN/EAN 5906301812593
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 850 mm [±1 mm]
Width 180 mm [±1 mm]
Height 70 mm [±1 mm]
Weight 54590 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 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 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
Elemental analysis
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%
Environmental data
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: 090224-2026
Magnet Unit Converter
Pulling force
Magnetic Induction
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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. Protects mills, crushers, and shredders from falling screws, excavator teeth, or hammers.
Ferrite magnets work effectively at a greater distance (high suspension), but with less surface force. 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). Thanks to this, the device is waterproof, dustproof, and very durable. 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. 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.

Strengths as well as weaknesses of rare earth magnets.

Pros

Besides their magnetic performance, neodymium magnets are valued for these benefits:
  • Their power is maintained, and after approximately 10 years it drops only by ~1% (according to research),
  • They have excellent resistance to magnetism drop when exposed to opposing magnetic fields,
  • A magnet with a shiny silver surface has better aesthetics,
  • Neodymium magnets achieve maximum magnetic induction on a their surface, which ensures high operational effectiveness,
  • Neodymium magnets are characterized by extremely high magnetic induction on the magnet surface and can function (depending on the shape) even at a temperature of 230°C or more...
  • Possibility of individual machining and adjusting to concrete applications,
  • Versatile presence in modern technologies – they are used in computer drives, electric drive systems, advanced medical instruments, and multitasking production systems.
  • Relatively small size with high pulling force – neodymium magnets offer strong magnetic field in compact dimensions, which makes them useful in compact constructions

Weaknesses

Disadvantages of neodymium magnets:
  • At very strong impacts they can break, therefore we advise placing them in steel cases. A metal housing provides additional protection against damage, as well as increases the magnet's durability.
  • Neodymium magnets decrease their strength 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 durability even at temperatures up to 230°C
  • Due to the susceptibility of magnets to corrosion in a humid environment, we suggest using waterproof magnets made of rubber, plastic or other material resistant to moisture, in case of application outdoors
  • Due to limitations in producing threads and complex forms in magnets, we propose using casing - magnetic holder.
  • Potential hazard to health – tiny shards of magnets can be dangerous, in case of ingestion, which is particularly important in the context of child health protection. Furthermore, tiny parts of these products are able to disrupt the diagnostic process medical when they are in the body.
  • High unit price – neodymium magnets are more expensive than other types of magnets (e.g. ferrite), which increases costs of application in large quantities

Pull force analysis

Maximum holding power of the magnet – what contributes to it?

Holding force of 0.00 kg is a theoretical maximum value performed under standard conditions:
  • on a base made of mild steel, perfectly concentrating the magnetic flux
  • whose transverse dimension reaches at least 10 mm
  • with a surface free of scratches
  • under conditions of no distance (surface-to-surface)
  • during detachment in a direction vertical to the mounting surface
  • in neutral thermal conditions

Key elements affecting lifting force

In real-world applications, the real power results from several key aspects, ranked from most significant:
  • Distance – the presence of foreign body (paint, tape, air) interrupts the magnetic circuit, which lowers capacity rapidly (even by 50% at 0.5 mm).
  • Loading method – catalog parameter refers to detachment vertically. When applying parallel force, the magnet exhibits significantly lower power (often approx. 20-30% of maximum force).
  • Element thickness – for full efficiency, the steel must be adequately massive. Paper-thin metal limits the attraction force (the magnet "punches through" it).
  • Material type – the best choice is pure iron steel. Cast iron may have worse magnetic properties.
  • Base smoothness – the smoother and more polished the plate, the better the adhesion and higher the lifting capacity. Unevenness creates an air distance.
  • Temperature – heating the magnet results in weakening of induction. It is worth remembering the maximum operating temperature for a given model.

Holding force was tested on a smooth steel plate of 20 mm thickness, when the force acted perpendicularly, in contrast under parallel forces the load capacity is reduced by as much as 5 times. Additionally, even a minimal clearance between the magnet’s surface and the plate decreases the load capacity.

Precautions when working with neodymium magnets
Finger safety

Pinching hazard: The attraction force is so immense that it can result in blood blisters, pinching, and even bone fractures. Protective gloves are recommended.

Do not give to children

NdFeB magnets are not intended for children. Accidental ingestion of several magnets may result in them pinching intestinal walls, which poses a severe health hazard and necessitates urgent medical intervention.

Do not drill into magnets

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

Powerful field

Before use, read the rules. Uncontrolled attraction can destroy the magnet or hurt your hand. Think ahead.

Shattering risk

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

Heat warning

Keep cool. NdFeB magnets are sensitive to heat. If you need operation above 80°C, inquire about special high-temperature series (H, SH, UH).

Avoid contact if allergic

Medical facts indicate that the nickel plating (the usual finish) is a strong allergen. If you have an allergy, refrain from touching magnets with bare hands and choose coated magnets.

Threat to navigation

Navigation devices and mobile phones are extremely susceptible to magnetism. Close proximity with a strong magnet can permanently damage the internal compass in your phone.

Protect data

Very strong magnetic fields can corrupt files on credit cards, HDDs, and storage devices. Maintain a gap of min. 10 cm.

Warning for heart patients

Warning for patients: Powerful magnets affect electronics. Keep at least 30 cm distance or request help to work with the magnets.

Attention! Details about hazards in the article: Safety of working with magnets.