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neodymium magnets

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BM 380x180x70 [4x M8] - magnetic beam

magnetic beam

Catalog no 090218

GTIN: 5906301812531

5

length [±0,1 mm]

380 mm

Width [±0,1 mm]

180 mm

Height [±0,1 mm]

70 mm

Weight

24400 g

4185.08 with VAT / pcs + price for transport

3402.50 ZŁ net + 23% VAT / pcs

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BM 380x180x70 [4x M8] - magnetic beam

Specification/characteristics BM 380x180x70 [4x M8] - magnetic beam
properties
values
Cat. no.
090218
GTIN
5906301812531
Production/Distribution
Dhit sp. z o.o.
Country of origin
Poland / China / Germany
Customs code
85059029
length
380 mm [±0,1 mm]
Width
180 mm [±0,1 mm]
Height
70 mm [±0,1 mm]
Weight
24400 g [±0,1 mm]
Manufacturing Tolerance
± 0.1 mm

Magnetic properties of material

properties
values
units

Physical properties of NdFeB

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 106
°C-1
Thermal expansion perpendicular (⊥) to orientation (M)
-(1-3) x 10-6
°C-1
Young's modulus
1.7 x 104
kg/mm²

Shopping tips

It is a device used to catch metals from bulk materials. It is usually mounted over a conveyor belt or in chutes. It protects mills and crushers from bolts or hammers falling in.
Ferrite magnets act over a longer distance but with less surface force. They are ideal for catching large pieces of iron (bolts, nails, cans) from a thicker layer of material. Neodymium is unrivaled in catching fine filings and wires. The choice depends on the size of impurities and the thickness of the material layer.
The separator housing is high-quality stainless steel. Thanks to this, the device is waterproof and durable. It can be safely used in contact with food.
Cleaning the plate separator is done manually. Simply push the attracted elements outside the belt area. For ease, a cleaning overlay (drawer) can be used.
We can produce a magnetic block perfectly matched to your installation. Dimensions and mounting system are agreed with the client. Contact us for a quote.

Advantages as well as disadvantages of neodymium magnets NdFeB.

In addition to their pulling strength, neodymium magnets provide the following advantages:

  • Their power is durable, and after around 10 years, it drops only by ~1% (according to research),
  • They are extremely resistant to demagnetization caused by external magnetic sources,
  • The use of a decorative gold surface provides a eye-catching finish,
  • The outer field strength of the magnet shows advanced magnetic properties,
  • With the right combination of compounds, they reach increased thermal stability, enabling operation at or above 230°C (depending on the form),
  • With the option for customized forming and targeted design, these magnets can be produced in various shapes and sizes, greatly improving application potential,
  • Key role in modern technologies – they are used in hard drives, electric motors, clinical machines or even sophisticated instruments,
  • Relatively small size with high magnetic force – neodymium magnets offer strong power in tiny dimensions, which makes them useful in small systems

Disadvantages of neodymium magnets:

  • They may fracture when subjected to a powerful impact. If the magnets are exposed to physical collisions, it is suggested to place them in a metal holder. The steel housing, in the form of a holder, protects the magnet from damage and additionally strengthens its overall resistance,
  • Magnets lose field strength when exposed to temperatures exceeding 80°C. In most cases, this leads to irreversible performance loss (influenced by the magnet’s form). To address this, we provide [AH] models with superior thermal resistance, able to operate even at 230°C or more,
  • They rust in a moist environment, especially when used outside, we recommend using moisture-resistant magnets, such as those made of non-metallic materials,
  • Limited ability to create threads in the magnet – the use of a external casing is recommended,
  • Safety concern linked to microscopic shards may arise, in case of ingestion, which is significant in the health of young users. It should also be noted that small elements from these magnets can interfere with diagnostics after being swallowed,
  • Due to expensive raw materials, their cost is above average,

Maximum magnetic pulling forcewhat contributes to it?

The given holding capacity of the magnet means the highest holding force, calculated under optimal conditions, namely:

  • using a steel plate with low carbon content, acting as a magnetic circuit closure
  • with a thickness of minimum 10 mm
  • with a smooth surface
  • with zero air gap
  • in a perpendicular direction of force
  • in normal thermal conditions

What influences lifting capacity in practice

The lifting capacity of a magnet depends on in practice key elements, ordered from most important to least significant:

  • Air gap between the magnet and the plate, since even a very small distance (e.g. 0.5 mm) can cause a drop in lifting force of up to 50%.
  • Direction of applied force, because the maximum lifting capacity is achieved under perpendicular application. The force required to slide the magnet along the plate is usually several times lower.
  • Thickness of the plate, as a plate that is too thin causes part of the magnetic flux not to be used and to remain wasted in the air.
  • Material of the plate, because higher carbon content lowers holding force, while higher iron content increases it. The best choice is steel with high magnetic permeability and high saturation induction.
  • Surface of the plate, because the more smooth and polished it is, the better the contact and consequently the greater the magnetic saturation.
  • Operating temperature, since all permanent magnets have a negative temperature coefficient. This means that at high temperatures they are weaker, while at sub-zero temperatures they become slightly stronger.

* Lifting capacity testing was conducted on a smooth plate of suitable thickness, under perpendicular forces, however under shearing force the load capacity is reduced by as much as 75%. Moreover, even a slight gap {between} the magnet’s surface and the plate reduces the holding force.

Precautions

The magnet is coated with nickel - be careful if you have an allergy.

Studies show a small percentage of people have allergies to certain metals, including nickel. An allergic reaction often manifests as skin redness and rash. If you have a nickel allergy, you can try wearing gloves or simply avoid direct contact with nickel-plated neodymium magnets.

Keep neodymium magnets away from TV, wallet, and computer HDD.

The strong magnetic field generated by neodymium magnets can destroy magnetic media such as floppy disks, video tapes, HDDs, credit cards, magnetic ID cards, cassette tapes, or other devices. They can also destroy videos, televisions, CRT computer monitors. Remember not to place neodymium magnets close to these electronic devices.

Keep neodymium magnets as far away as possible from GPS and smartphones.

Magnetic fields generated by neodymium magnets interfere with compasses and magnetometers used in navigation, as well as internal compasses of smartphones and GPS devices.

Magnets made of neodymium are fragile and can easily break as well as shatter.

Neodymium magnetic are delicate and will crack if allowed to collide with each other, even from a distance of a few centimeters. They are coated with a shiny nickel plating similar to steel, but they are not as hard. In the case of a collision between two magnets, there can be a scattering of small sharp metal fragments in different directions. Protecting your eyes is essential.

Neodymium magnets are the strongest, most remarkable magnets on the planet, and the surprising force between them can shock you at first.

Make sure to review all the information we have provided. This will help you avoid harm to your body and damage to the magnets.

Dust and powder from neodymium magnets are highly flammable.

Avoid drilling or mechanical processing of neodymium magnets. If the magnet is crushed into fine powder or dust, it becomes highly flammable.

Neodymium magnets should not be near people with pacemakers.

Neodymium magnets generate very strong magnetic fields that can interfere with the operation of a pacemaker. This is because many of these devices are equipped with a function that deactivates the device in a magnetic field.

Neodymium magnets can become demagnetized at high temperatures.

Although magnets have shown to retain their effectiveness up to 80°C or 175°F, this temperature may vary depending on the type of material, shape, and intended use of the magnet.

  Do not give neodymium magnets to children.

Not all neodymium magnets are toys, so do not let children play with them. In such a situation, surgery is necessary to remove them. In the worst case scenario, it can result in death.

It is crucial not to allow the magnets to pinch together uncontrollably or place your fingers in their path as they attract to each other.

Magnets will jump and contact together within a distance of several to around 10 cm from each other.

Be careful!

Please see the article - What danger lies in neodymium magnets? You will learn how to handle them properly.

Dhit sp. z o.o.

e-mail: bok@dhit.pl

tel: +48 888 99 98 98