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BM 320x180x70 [4x M8] - magnetic beam

magnetic beam

Catalog no 090217

GTIN/EAN: 5906301812524

5.00

length

320 mm [±1 mm]

Width

180 mm [±1 mm]

Height

70 mm [±1 mm]

Weight

20550 g

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3635.14 ZŁ with VAT / pcs + price for transport

2955.40 ZŁ net + 23% VAT / pcs

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Weight and appearance of neodymium magnets can be tested with our magnetic calculator.

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Technical - BM 320x180x70 [4x M8] - magnetic beam

Specification / characteristics - BM 320x180x70 [4x M8] - magnetic beam

properties
properties values
Cat. no. 090217
GTIN/EAN 5906301812524
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 320 mm [±1 mm]
Width 180 mm [±1 mm]
Height 70 mm [±1 mm]
Weight 20550 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
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%
Sustainability
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: 090217-2026
Magnet Unit Converter
Force (pull)
Field Strength
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Strengths and weaknesses of Nd2Fe14B magnets.

Advantages

Besides their stability, neodymium magnets are valued for these benefits:
  • They virtually do not lose strength, because even after 10 years the decline in efficiency is only ~1% (in laboratory conditions),
  • Magnets perfectly defend themselves against demagnetization caused by ambient magnetic noise,
  • A magnet with a smooth nickel surface has better aesthetics,
  • Magnetic induction on the surface of the magnet remains very high,
  • Through (adequate) combination of ingredients, they can achieve high thermal strength, allowing for functioning at temperatures reaching 230°C and above...
  • Due to the potential of accurate molding and customization to unique projects, magnetic components can be created in a wide range of geometric configurations, which makes them more universal,
  • Fundamental importance in high-tech industry – they serve a role in computer drives, electromotive mechanisms, diagnostic systems, and technologically advanced constructions.
  • Relatively small size with high pulling force – neodymium magnets offer high power in compact dimensions, which makes them useful in small systems

Weaknesses

Disadvantages of NdFeB magnets:
  • To avoid cracks upon strong impacts, we recommend using special steel housings. Such a solution secures the magnet and simultaneously improves its 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, as well as shape of the magnet). For those who need magnets for extreme conditions, we offer [AH] versions withstanding up to 230°C
  • They oxidize in a humid environment. For use outdoors we advise using waterproof magnets e.g. in rubber, plastic
  • We recommend casing - magnetic holder, due to difficulties in producing nuts inside the magnet and complicated shapes.
  • Potential hazard related to microscopic parts of magnets pose a threat, if swallowed, which gains importance in the context of child health protection. Furthermore, tiny parts of these products are able to disrupt the diagnostic process medical when they are in the body.
  • High unit price – neodymium magnets have a higher price than other types of magnets (e.g. ferrite), which hinders application in large quantities

Pull force analysis

Maximum lifting force for a neodymium magnet – what contributes to it?

The declared magnet strength refers to the maximum value, measured under laboratory conditions, namely:
  • with the application of a sheet made of special test steel, ensuring full magnetic saturation
  • with a thickness of at least 10 mm
  • characterized by smoothness
  • without the slightest clearance between the magnet and steel
  • during detachment in a direction vertical to the plane
  • at standard ambient temperature

Lifting capacity in practice – influencing factors

In practice, the real power is determined by many variables, ranked from most significant:
  • Space between surfaces – every millimeter of separation (caused e.g. by veneer or dirt) diminishes the pulling force, often by half at just 0.5 mm.
  • Pull-off angle – note that the magnet has greatest strength perpendicularly. Under shear forces, the capacity drops drastically, often to levels of 20-30% of the maximum value.
  • Substrate thickness – for full efficiency, the steel must be adequately massive. Paper-thin metal limits the attraction force (the magnet "punches through" it).
  • Metal type – different alloys reacts the same. Alloy additives weaken the attraction effect.
  • Plate texture – smooth surfaces ensure maximum contact, which improves field saturation. Uneven metal reduce efficiency.
  • Temperature influence – high temperature weakens magnetic field. Exceeding the limit temperature can permanently demagnetize the magnet.

Lifting capacity testing was performed on plates with a smooth surface of optimal thickness, under a perpendicular pulling force, however under attempts to slide the magnet the holding force is lower. Moreover, even a small distance between the magnet’s surface and the plate lowers the holding force.

Safety rules for work with NdFeB magnets
Compass and GPS

Remember: rare earth magnets generate a field that disrupts precision electronics. Maintain a separation from your phone, device, and GPS.

Beware of splinters

Despite metallic appearance, the material is delicate and not impact-resistant. Do not hit, as the magnet may shatter into sharp, dangerous pieces.

Electronic hazard

Avoid bringing magnets close to a wallet, computer, or TV. The magnetic field can destroy these devices and erase data from cards.

Crushing force

Pinching hazard: The pulling power is so immense that it can result in hematomas, pinching, and broken bones. Protective gloves are recommended.

Operating temperature

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

Do not underestimate power

Handle magnets with awareness. Their powerful strength can surprise even professionals. Stay alert and respect their power.

Adults only

NdFeB magnets are not toys. Accidental ingestion of several magnets can lead to them pinching intestinal walls, which constitutes a critical condition and necessitates urgent medical intervention.

Allergic reactions

Allergy Notice: The nickel-copper-nickel coating consists of nickel. If redness occurs, cease handling magnets and wear gloves.

Danger to pacemakers

Individuals with a ICD should maintain an absolute distance from magnets. The magnetism can interfere with the functioning of the life-saving device.

Fire risk

Fire hazard: Neodymium dust is highly flammable. Do not process magnets without safety gear as this may cause fire.

Attention! Learn more about hazards in the article: Magnet Safety Guide.