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BM 750x180x70 [4x M8] - magnetic beam

magnetic beam

Catalog no 090223

GTIN/EAN: 5906301812586

5.00
length
750 mm [±1 mm]
Width
180 mm [±1 mm]
Height
70 mm [±1 mm]
Weight
48150 g

How we measure these parameters — certificates and measurements

technical specifications »

5621.90 zł net / pcs

6914.94 zł with VAT (23% VAT) / pcs

price for transport

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Quantity
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Gross
price from 1 pcs
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price from 5 pcs
5284.59 zł
6500.04 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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Product card - BM 750x180x70 [4x M8] - magnetic beam

Specification / characteristics - BM 750x180x70 [4x M8] - magnetic beam

properties
properties values
Cat. no. 090223
GTIN/EAN 5906301812586
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 750 mm [±1 mm]
Width 180 mm [±1 mm]
Height 70 mm [±1 mm]
Weight 48150 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 and environmental data

Material specification

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: 090223-2026
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Pulling force

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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. Protects mills, crushers, and shredders from falling screws, excavator teeth, or hammers.
Ferrite separators are characterized by a deep, penetrating magnetic field. We recommend them for protecting machines against large, heavy scrap (so-called tramp iron). 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.
The separator housing is high-quality stainless steel, welded by TIG method. 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. 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.
As a manufacturer, we fulfill individual orders for specific conveyor belt widths. Dimensions and mounting system are agreed with the client at the design stage. Send us dimensions of your conveyor belt and type of raw material, and we will select the appropriate solution.

Advantages as well as disadvantages of Nd2Fe14B magnets.

Strengths

Besides their magnetic performance, neodymium magnets are valued for these benefits:
  • They do not lose magnetism, even over around 10 years – the drop in lifting capacity is only ~1% (based on measurements),
  • They retain their magnetic properties even under close interference source,
  • Thanks to the elegant finish, the coating of Ni-Cu-Ni, gold-plated, or silver-plated gives an modern appearance,
  • The surface of neodymium magnets generates a concentrated magnetic field – this is one of their assets,
  • Through (appropriate) combination of ingredients, they can achieve high thermal strength, enabling action at temperatures reaching 230°C and above...
  • Possibility of precise forming and optimizing to atypical conditions,
  • Significant place in modern technologies – they find application in HDD drives, drive modules, advanced medical instruments, and industrial machines.
  • Compactness – despite small sizes they generate large force, making them ideal for precision applications

Limitations

Disadvantages of NdFeB magnets:
  • At 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.
  • When exposed to high temperature, neodymium magnets suffer a drop in strength. Often, when the temperature exceeds 80°C, their strength decreases (depending on the size and shape of the magnet). For those who need magnets for extreme conditions, we offer [AH] versions withstanding up to 230°C
  • When exposed to humidity, magnets start to rust. To use them in conditions outside, it is recommended to use protective magnets, such as those in rubber or plastics, which prevent oxidation and corrosion.
  • Limited ability of producing nuts in the magnet and complicated forms - recommended is casing - magnetic holder.
  • Health risk resulting from small fragments of magnets can be dangerous, if swallowed, which is particularly important in the aspect of protecting the youngest. It is also worth noting that small elements of these products are able to be problematic in diagnostics medical in case of swallowing.
  • Due to expensive raw materials, their price exceeds standard values,

Lifting parameters

Best holding force of the magnet in ideal parameters – what affects it?

Magnet power was defined for ideal contact conditions, assuming:
  • using a base made of low-carbon steel, functioning as a magnetic yoke
  • whose thickness is min. 10 mm
  • with a surface free of scratches
  • without the slightest clearance between the magnet and steel
  • for force applied at a right angle (pull-off, not shear)
  • at temperature approx. 20 degrees Celsius

What influences lifting capacity in practice

Real force is affected by specific conditions, mainly (from most important):
  • Gap (between the magnet and the metal), as even a tiny distance (e.g. 0.5 mm) can cause a decrease in lifting capacity by up to 50% (this also applies to varnish, rust or debris).
  • Force direction – note that the magnet has greatest strength perpendicularly. Under shear forces, the holding force drops drastically, often to levels of 20-30% of the nominal value.
  • Steel thickness – insufficiently thick steel causes magnetic saturation, causing part of the power to be wasted into the air.
  • Metal type – not every steel reacts the same. High carbon content weaken the interaction with the magnet.
  • Surface quality – the more even the surface, the better the adhesion and stronger the hold. Roughness acts like micro-gaps.
  • Temperature – heating the magnet causes a temporary drop of induction. Check the maximum operating temperature for a given model.

Lifting capacity testing was conducted on a smooth plate of optimal thickness, under perpendicular forces, whereas under shearing force the holding force is lower. In addition, even a slight gap between the magnet and the plate reduces the holding force.

H&S for magnets
Material brittleness

Despite metallic appearance, neodymium is brittle and cannot withstand shocks. Avoid impacts, as the magnet may crumble into sharp, dangerous pieces.

Nickel coating and allergies

Some people suffer from a sensitization to Ni, which is the common plating for NdFeB magnets. Prolonged contact can result in an allergic reaction. We strongly advise wear protective gloves.

Combustion hazard

Dust created during machining of magnets is self-igniting. Do not drill into magnets without proper cooling and knowledge.

Demagnetization risk

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

Pinching danger

Mind your fingers. Two large magnets will snap together instantly with a force of several hundred kilograms, destroying everything in their path. Be careful!

Medical implants

Individuals with a ICD must keep an safe separation from magnets. The magnetic field can interfere with the operation of the implant.

Choking Hazard

Neodymium magnets are not suitable for play. Eating several magnets can lead to them pinching intestinal walls, which poses a critical condition and necessitates immediate surgery.

Compass and GPS

Note: rare earth magnets produce a field that disrupts precision electronics. Maintain a safe distance from your phone, tablet, and navigation systems.

Keep away from computers

Powerful magnetic fields can erase data on credit cards, hard drives, and other magnetic media. Stay away of min. 10 cm.

Do not underestimate power

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

Warning! Looking for details? Read our article: Are neodymium magnets dangerous?