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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

How we measure these parameters — certificates and measurements

technical specifications »

3849.50 zł net / pcs

4734.89 zł with VAT (23% VAT) / pcs

price for transport

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Frequently asked questions

How do I choose a separator for fine contamination and check availability?
Start with the size and type of contaminant, the material flow and the working surface. Compare the magnetic-field data and dimensions stated on the selected product card, and check current availability there.
Where can I order a separator for a production line, and what should I check?
Match the device to the installation dimensions, material flow, cleaning method and housing requirements. A drawing or the dimensions of the transfer point help determine whether a catalogue model fits or a custom version is needed.
How can I verify a separator's declared magnetic parameters before purchase?
Ask for the measured value, the point of measurement and the method or instrument used. A field-strength figure without its measurement conditions cannot be compared reliably with another product.
Can a magnetic beam withstand continuous work on a production line?
Check the construction, mounting and cleaning procedure for the chosen beam. Captured metal must be removed regularly; a layer of particles can reduce effective separation even when the magnets themselves are sound.
What roller design is suitable for a dusty environment?
Check the bearing protection, surface finish and cleaning access of the selected model. Dust accumulation and abrasion depend on the installation, so specify the actual process conditions before choosing a version.
How do I choose the size of a hand-held separator?
Match the rod diameter and length to the container and material depth, and consider the tool's weight for repeated manual work. Use the dimensions and magnetic data on the current product card.
What is a hand-held separator for, and how is it different from a built-in rod?
A built-in rod stays in the process line. A hand-held separator is moved through a material sample or container and then cleaned. It is useful for spot checks or occasional cleanup when permanent installation is not required.
Which separator type suits a small production plant?
Choose by the point in the process: a grate at a hopper, a beam over a conveyor, a built-in rod in a chute or pipe, or a hand-held tool for spot checks. A magnetic gripper handles steel parts rather than separating contamination.

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 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 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: 090219-2026
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This separator is tasked with cleaning the product (coal, aggregate, recycling) from steel contaminants. It is usually mounted above the conveyor belt (so-called overbelt) or in chutes. The main goal is to protect crushing machines from destruction and ensure product purity.
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 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). 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. Periodically wipe the working surface with a cloth or slide collected metal to the side. Cleaning frequency depends on the amount of contaminants in the product - the more metal, the more often you need to clean.
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.

Strengths as well as weaknesses of rare earth magnets.

Pros

In addition to their long-term stability, neodymium magnets provide the following advantages:
  • Their power is durable, and after around ten years it decreases only by ~1% (theoretically),
  • They feature excellent resistance to magnetism drop as a result of external magnetic sources,
  • In other words, due to the glossy surface of silver, the element is aesthetically pleasing,
  • Neodymium magnets achieve maximum magnetic induction on a small area, which ensures high operational effectiveness,
  • Thanks to resistance to high temperature, they are able to function (depending on the shape) even at temperatures up to 230°C and higher...
  • Thanks to versatility in constructing and the capacity to modify to specific needs,
  • Wide application in modern technologies – they serve a role in magnetic memories, electromotive mechanisms, medical devices, also modern systems.
  • Relatively small size with high pulling force – neodymium magnets offer strong magnetic field in compact dimensions, which makes them useful in miniature devices

Weaknesses

What to avoid - cons of neodymium magnets: weaknesses and usage proposals
  • They are prone to damage upon too strong impacts. To avoid cracks, it is worth securing magnets using a steel holder. Such protection not only shields the magnet but also improves its resistance to damage
  • Heat sensitivity: observe the temperature specified for this product. Overheating may permanently weaken the magnet.
  • Magnets exposed to a humid environment can rust. Therefore when using outdoors, we suggest using water-impermeable magnets made of rubber, plastic or other material resistant to moisture
  • Due to limitations in creating threads and complex shapes in magnets, we recommend using a housing - magnetic mount.
  • Health risk resulting from small fragments of magnets can be dangerous, when accidentally swallowed, which is particularly important in the context of child health protection. It is also worth noting that small components of these devices are able to complicate diagnosis medical after entering the body.
  • With mass production the cost of neodymium magnets is a challenge,

Holding force characteristics

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

The force parameter is a result of laboratory testing performed under the following configuration:
  • with the contact of a yoke made of low-carbon steel, guaranteeing maximum field concentration
  • possessing a massiveness of minimum 10 mm to avoid saturation
  • with an ground contact surface
  • with total lack of distance (without impurities)
  • during detachment in a direction vertical to the plane
  • at room temperature

Practical aspects of lifting capacity – factors

It is worth knowing that the working load may be lower subject to elements below, in order of importance:
  • Air gap (betwixt the magnet and the metal), since even a very small distance (e.g. 0.5 mm) can cause a reduction in force by up to 50% (this also applies to paint, corrosion or debris).
  • Pull-off angle – remember that the magnet has greatest strength perpendicularly. Under shear forces, the capacity drops drastically, often to levels of 20-30% of the maximum value.
  • Plate thickness – too thin sheet causes magnetic saturation, causing part of the flux to be lost to the other side.
  • Material composition – not every steel attracts identically. Alloy additives worsen the interaction with the magnet.
  • Base smoothness – the more even the plate, the larger the contact zone and stronger the hold. Unevenness acts like micro-gaps.
  • Thermal environment – temperature increase causes a temporary drop of force. It is worth remembering the thermal limit for a given model.

Lifting capacity testing was carried out on a smooth plate of optimal thickness, under a perpendicular pulling force, whereas under parallel forces the load capacity is reduced by as much as 75%. Additionally, even a minimal clearance between the magnet’s surface and the plate lowers the holding force.

Warnings
Machining danger

Mechanical processing of neodymium magnets carries a risk of fire risk. Magnetic powder oxidizes rapidly with oxygen and is difficult to extinguish.

No play value

Adult use only. Small elements pose a choking risk, causing serious injuries. Keep out of reach of children and animals.

Respect the power

Before use, read the rules. Sudden snapping can break the magnet or hurt your hand. Be predictive.

Skin irritation risks

A percentage of the population suffer from a sensitization to nickel, which is the standard coating for neodymium magnets. Extended handling can result in a rash. We suggest use safety gloves.

Health Danger

Life threat: Neodymium magnets can turn off heart devices and defibrillators. Do not approach if you have electronic implants.

Threat to navigation

Be aware: rare earth magnets produce a field that disrupts sensitive sensors. Keep a safe distance from your mobile, device, and GPS.

Protect data

Do not bring magnets near a purse, laptop, or TV. The magnetism can destroy these devices and wipe information from cards.

Beware of splinters

Neodymium magnets are ceramic materials, which means they are very brittle. Impact of two magnets will cause them cracking into shards.

Demagnetization risk

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

Hand protection

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

Warning! Need more info? Check our post: Are neodymium magnets dangerous?