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BM 380x180x70 [4x M8] - magnetic beam

magnetic beam

Catalog no 090218

GTIN/EAN: 5906301812531

5.00

length

380 mm [±1 mm]

Width

180 mm [±1 mm]

Height

70 mm [±1 mm]

Weight

24400 g

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4185.08 ZŁ with VAT / pcs + price for transport

3402.50 ZŁ net + 23% VAT / pcs

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Carbon Footprint – environmental impact GPSR Regulation – product safety
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Technical parameters - BM 380x180x70 [4x M8] - magnetic beam

Specification / characteristics - BM 380x180x70 [4x M8] - magnetic beam

properties
properties values
Cat. no. 090218
GTIN/EAN 5906301812531
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 380 mm [±1 mm]
Width 180 mm [±1 mm]
Height 70 mm [±1 mm]
Weight 24400 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: 090218-2026
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Force (pull)
Magnetic Field
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It is a device used to catch unwanted metals from bulk raw materials transported on a belt. 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 are ideal for catching large pieces of iron (screws, nails, cans, excavator teeth) from a long distance. Neodymiums are unrivaled in catching fine filings, wires, and small screws. The choice depends on the size of contaminants and the thickness of the raw material layer on the belt.
The construction is tightly welded from acid-resistant sheet, which guarantees tightness. This ensures full resistance to corrosion, water, and difficult weather conditions. 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. 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. Dimensions and mounting system are agreed with the client at the design stage. Contact us to receive a free quote and technical drawing.

Strengths and weaknesses of rare earth magnets.

Benefits

Besides their high retention, neodymium magnets are valued for these benefits:
  • They virtually do not lose strength, because even after ten years the performance loss is only ~1% (according to literature),
  • They maintain their magnetic properties even under strong external field,
  • In other words, due to the shiny layer of gold, the element looks attractive,
  • Magnetic induction on the working layer of the magnet turns out to be extremely intense,
  • Made from properly selected components, these magnets show impressive resistance to high heat, enabling them to function (depending on their form) at temperatures up to 230°C and above...
  • Possibility of exact modeling as well as optimizing to complex applications,
  • Significant place in modern industrial fields – they are commonly used in hard drives, brushless drives, medical equipment, and multitasking production systems.
  • Relatively small size with high pulling force – neodymium magnets offer high power in small dimensions, which makes them useful in small systems

Weaknesses

Disadvantages of neodymium magnets:
  • At very strong impacts they can crack, therefore we advise placing them in strong housings. A metal housing provides additional protection against damage, as well as increases the magnet's durability.
  • Neodymium magnets demagnetize when exposed to high temperatures. After reaching 80°C, many of them experience permanent weakening of strength (a factor is the shape as well as dimensions of the magnet). We offer magnets specially adapted to work at temperatures up to 230°C marked [AH], which are extremely resistant to heat
  • They rust in a humid environment - during use outdoors we advise using waterproof magnets e.g. in rubber, plastic
  • We recommend casing - magnetic holder, due to difficulties in producing threads inside the magnet and complex forms.
  • Possible danger related to microscopic parts of magnets are risky, when accidentally swallowed, which becomes key in the context of child health protection. Additionally, small components of these products are able to complicate diagnosis medical after entering the body.
  • Higher cost of purchase is one of the disadvantages compared to ceramic magnets, especially in budget applications

Pull force analysis

Detachment force of the magnet in optimal conditions – what it depends on?

The force parameter is a theoretical maximum value conducted under the following configuration:
  • on a block made of structural steel, effectively closing the magnetic field
  • with a cross-section minimum 10 mm
  • characterized by even structure
  • under conditions of no distance (surface-to-surface)
  • under perpendicular force direction (90-degree angle)
  • at standard ambient temperature

What influences lifting capacity in practice

During everyday use, the actual holding force depends on many variables, listed from crucial:
  • Air gap (betwixt the magnet and the metal), as even a very small distance (e.g. 0.5 mm) leads to a decrease in force by up to 50% (this also applies to varnish, rust or debris).
  • Force direction – catalog parameter refers to pulling vertically. When attempting to slide, the magnet holds significantly lower power (typically approx. 20-30% of maximum force).
  • Steel thickness – insufficiently thick plate does not close the flux, causing part of the power to be lost to the other side.
  • Metal type – different alloys attracts identically. High carbon content worsen the interaction with the magnet.
  • Base smoothness – the smoother and more polished the surface, the larger the contact zone and higher the lifting capacity. Roughness creates an air distance.
  • Thermal conditions – NdFeB sinters have a negative temperature coefficient. When it is hot they lose power, and in frost gain strength (up to a certain limit).

Lifting capacity testing was performed on plates with a smooth surface of suitable thickness, under perpendicular forces, however under parallel forces the lifting capacity is smaller. Moreover, even a minimal clearance between the magnet’s surface and the plate reduces the lifting capacity.

Warnings
Threat to navigation

An intense magnetic field negatively affects the functioning of compasses in smartphones and GPS navigation. Maintain magnets close to a smartphone to prevent breaking the sensors.

Magnets are brittle

Despite metallic appearance, the material is brittle and cannot withstand shocks. Do not hit, as the magnet may shatter into sharp, dangerous pieces.

Crushing risk

Risk of injury: The attraction force is so immense that it can cause blood blisters, crushing, and even bone fractures. Use thick gloves.

Maximum temperature

Standard neodymium magnets (N-type) undergo demagnetization when the temperature surpasses 80°C. This process is irreversible.

Do not give to children

Neodymium magnets are not toys. Accidental ingestion of several magnets can lead to them connecting inside the digestive tract, which poses a direct threat to life and requires urgent medical intervention.

ICD Warning

Individuals with a ICD must keep an safe separation from magnets. The magnetic field can disrupt the functioning of the life-saving device.

Fire risk

Fire warning: Neodymium dust is explosive. Avoid machining magnets without safety gear as this may cause fire.

Magnetic media

Very strong magnetic fields can destroy records on payment cards, hard drives, and other magnetic media. Maintain a gap of at least 10 cm.

Conscious usage

Before starting, read the rules. Uncontrolled attraction can destroy the magnet or injure your hand. Be predictive.

Allergy Warning

Allergy Notice: The Ni-Cu-Ni coating consists of nickel. If skin irritation happens, immediately stop handling magnets and use protective gear.

Attention! Need more info? Read our article: Why are neodymium magnets dangerous?