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BM 450x180x70 [4x M8] - magnetic beam

magnetic beam

Catalog no 090219

GTIN/EAN: 5906301812548

5.00
length
450 mm [±1 mm]
Width
180 mm [±1 mm]
Height
70 mm [±1 mm]
Weight
28900 g
technical details »

4734.89 zł with VAT / pcs + price for transport

3849.50 zł net + 23% VAT / pcs

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Technical - BM 450x180x70 [4x M8] - magnetic beam

Specification / characteristics - BM 450x180x70 [4x M8] - magnetic beam

properties
properties values
Cat. no. 090219
GTIN/EAN 5906301812548
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 450 mm [±1 mm]
Width 180 mm [±1 mm]
Height 70 mm [±1 mm]
Weight 28900 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 and environmental data

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%

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: 090219-2026
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Magnet pull force

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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 is cheaper and has deeper field penetration, which is good with a thick layer of raw material. 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 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. Suitable for chemical, food, and pharmaceutical industries.
Removing contaminants is simple but requires periodic stopping of the process or access to the magnet. Periodically wipe the working surface with a cloth or slide collected metal to the side. 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 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 and cons of rare earth magnets.

Benefits

Besides their exceptional magnetic power, neodymium magnets offer the following advantages:
  • Their strength is maintained, and after approximately ten years it drops only by ~1% (according to research),
  • Magnets very well defend themselves against loss of magnetization caused by external fields,
  • Thanks to the shiny finish, the plating of nickel, gold-plated, or silver-plated gives an aesthetic appearance,
  • The surface of neodymium magnets generates a unique magnetic field – this is a distinguishing feature,
  • 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...
  • Thanks to the option of accurate molding and adaptation to individualized projects, NdFeB magnets can be created in a wide range of forms and dimensions, which expands the range of possible applications,
  • Wide application in high-tech industry – they are utilized in mass storage devices, drive modules, advanced medical instruments, as well as technologically advanced constructions.
  • Thanks to their power density, small magnets offer high operating force, in miniature format,

Disadvantages

Characteristics of disadvantages of neodymium magnets: weaknesses and usage proposals
  • Brittleness is one of their disadvantages. Upon intense impact they can fracture. We recommend keeping them in a steel housing, 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 power. Therefore, we recommend our special magnets marked [AH], which maintain durability even at temperatures up to 230°C
  • When exposed to humidity, magnets start to rust. For applications outside, it is recommended to use protective magnets, such as magnets in rubber or plastics, which secure oxidation and corrosion.
  • Due to limitations in realizing threads and complicated forms in magnets, we recommend using casing - magnetic mount.
  • Possible danger related to microscopic parts of magnets can be dangerous, when accidentally swallowed, which gains importance in the aspect of protecting the youngest. Furthermore, tiny parts of these products are able to disrupt the diagnostic process medical after entering 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

Lifting parameters

Magnetic strength at its maximum – what it depends on?

The lifting capacity listed is a result of laboratory testing performed under specific, ideal conditions:
  • using a plate made of low-carbon steel, acting as a circuit closing element
  • whose transverse dimension reaches at least 10 mm
  • with a surface perfectly flat
  • without any insulating layer between the magnet and steel
  • for force applied at a right angle (pull-off, not shear)
  • at conditions approx. 20°C

Magnet lifting force in use – key factors

During everyday use, the actual holding force depends on a number of factors, presented from most significant:
  • Distance – the presence of foreign body (rust, tape, gap) interrupts the magnetic circuit, which reduces power steeply (even by 50% at 0.5 mm).
  • Loading method – declared lifting capacity refers to pulling vertically. When attempting to slide, the magnet exhibits much less (often approx. 20-30% of maximum force).
  • Plate thickness – insufficiently thick plate does not close the flux, causing part of the flux to be wasted into the air.
  • Steel grade – the best choice is pure iron steel. Hardened steels may generate lower lifting capacity.
  • Surface quality – the smoother and more polished the plate, the better the adhesion and stronger the hold. Roughness acts like micro-gaps.
  • Operating temperature – neodymium magnets have a sensitivity to temperature. When it is hot they are weaker, and at low temperatures gain strength (up to a certain limit).

Lifting capacity testing was performed on a smooth plate of optimal thickness, under perpendicular forces, in contrast under shearing force the lifting capacity is smaller. Additionally, even a small distance between the magnet and the plate reduces the holding force.

Precautions when working with NdFeB magnets
Demagnetization risk

Monitor thermal conditions. Exposing the magnet to high heat will destroy its magnetic structure and pulling force.

Keep away from children

Product intended for adults. Small elements pose a choking risk, leading to intestinal necrosis. Store away from children and animals.

ICD Warning

For implant holders: Powerful magnets disrupt medical devices. Keep minimum 30 cm distance or request help to work with the magnets.

Dust is flammable

Drilling and cutting of NdFeB material carries a risk of fire hazard. Neodymium dust oxidizes rapidly with oxygen and is hard to extinguish.

Nickel coating and allergies

Allergy Notice: The Ni-Cu-Ni coating contains nickel. If redness happens, cease handling magnets and wear gloves.

Crushing force

Danger of trauma: The attraction force is so immense that it can cause blood blisters, pinching, and even bone fractures. Protective gloves are recommended.

Immense force

Handle magnets consciously. Their immense force can shock even professionals. Be vigilant and respect their force.

Magnetic media

Very strong magnetic fields can destroy records on credit cards, HDDs, and storage devices. Stay away of at least 10 cm.

GPS and phone interference

A strong magnetic field interferes with the operation of magnetometers in smartphones and GPS navigation. Keep magnets close to a device to prevent breaking the sensors.

Beware of splinters

Watch out for shards. Magnets can fracture upon violent connection, ejecting sharp fragments into the air. Eye protection is mandatory.

Safety First! Looking for details? Read our article: Why are neodymium magnets dangerous?