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BM 320x180x70 [4x M8] - magnetic beam
magnetic beam
Catalog no 090217
GTIN/EAN: 5906301812524
length
320 mm [±1 mm]
Width
180 mm [±1 mm]
Height
70 mm [±1 mm]
Weight
20550 g
3635.14 ZŁ with VAT / pcs + price for transport
2955.40 ZŁ net + 23% VAT / pcs
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Technical - BM 320x180x70 [4x M8] - magnetic beam
Specification / characteristics - BM 320x180x70 [4x M8] - magnetic beam
| properties | values |
|---|---|
| Cat. no. | 090217 |
| GTIN/EAN | 5906301812524 |
| Production/Distribution | Dhit sp. z o.o. |
| 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
| 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 |
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 |
See also proposals
![UMGW 42x20x9 [M6] GW / N38 - magnetic holder internal thread](https://cdn3.dhit.pl/graphics/products/um-42x20x9-m8-gw-god.jpg "UMGW 42x20x9 [M6] GW / N38 - magnetic holder internal thread")
Advantages and disadvantages of neodymium magnets.
Benefits
- They virtually do not lose strength, because even after ten years the decline in efficiency is only ~1% (according to literature),
- Neodymium magnets prove to be remarkably resistant to magnetic field loss caused by magnetic disturbances,
- The use of an metallic layer of noble metals (nickel, gold, silver) causes the element to look better,
- Magnets are distinguished by huge magnetic induction on the working surface,
- Thanks to resistance to high temperature, they are capable of working (depending on the form) even at temperatures up to 230°C and higher...
- In view of the option of flexible forming and adaptation to individualized projects, neodymium magnets can be created in a variety of forms and dimensions, which makes them more universal,
- Fundamental importance in innovative solutions – they find application in hard drives, brushless drives, precision medical tools, and other advanced devices.
- Relatively small size with high pulling force – neodymium magnets offer strong magnetic field in compact dimensions, which enables their usage in small systems
Disadvantages
- To avoid cracks upon strong impacts, we suggest using special steel housings. Such a solution secures the magnet and simultaneously improves its durability.
- Neodymium magnets lose their strength under the influence of heating. As soon as 80°C is exceeded, many of them start losing their force. Therefore, we recommend our special magnets marked [AH], which maintain stability even at temperatures up to 230°C
- When exposed to humidity, magnets usually rust. For applications outside, it is recommended to use protective magnets, such as those in rubber or plastics, which prevent oxidation and corrosion.
- Limited possibility of creating threads in the magnet and complicated forms - preferred is a housing - mounting mechanism.
- Health risk to health – tiny shards of magnets can be dangerous, when accidentally swallowed, which becomes key in the context of child health protection. It is also worth noting that tiny parts of these products can complicate diagnosis medical in case of swallowing.
- High unit price – neodymium magnets cost more than other types of magnets (e.g. ferrite), which can limit application in large quantities
Holding force characteristics
Maximum lifting force for a neodymium magnet – what affects it?
- on a base made of mild steel, perfectly concentrating the magnetic field
- with a cross-section minimum 10 mm
- characterized by lack of roughness
- under conditions of ideal adhesion (surface-to-surface)
- for force acting at a right angle (pull-off, not shear)
- at room temperature
What influences lifting capacity in practice
- Clearance – existence of foreign body (rust, tape, air) interrupts the magnetic circuit, which reduces capacity steeply (even by 50% at 0.5 mm).
- Pull-off angle – remember that the magnet holds strongest perpendicularly. Under sliding down, the capacity drops significantly, often to levels of 20-30% of the nominal value.
- Base massiveness – too thin plate does not accept the full field, causing part of the flux to be lost to the other side.
- Chemical composition of the base – mild steel attracts best. Alloy admixtures decrease magnetic permeability and lifting capacity.
- Surface finish – ideal contact is obtained only on polished steel. Rough texture reduce the real contact area, weakening the magnet.
- Thermal environment – temperature increase results in weakening of induction. It is worth remembering the thermal limit for a given model.
Lifting capacity was assessed with the use of a smooth steel plate of suitable thickness (min. 20 mm), under perpendicular pulling force, whereas under parallel forces the lifting capacity is smaller. Moreover, even a small distance between the magnet and the plate decreases the load capacity.
Safe handling of NdFeB magnets
Fragile material
Neodymium magnets are sintered ceramics, meaning they are very brittle. Clashing of two magnets leads to them cracking into shards.
Combustion hazard
Powder generated during machining of magnets is flammable. Avoid drilling into magnets unless you are an expert.
Heat warning
Standard neodymium magnets (N-type) lose power when the temperature exceeds 80°C. This process is irreversible.
Caution required
Before starting, check safety instructions. Uncontrolled attraction can destroy the magnet or hurt your hand. Be predictive.
Pacemakers
Warning for patients: Strong magnetic fields affect electronics. Maintain at least 30 cm distance or request help to work with the magnets.
Safe distance
Data protection: Neodymium magnets can damage data carriers and delicate electronics (pacemakers, medical aids, timepieces).
Warning for allergy sufferers
Medical facts indicate that nickel (the usual finish) is a common allergen. If your skin reacts to metals, refrain from touching magnets with bare hands or select versions in plastic housing.
Crushing risk
Mind your fingers. Two large magnets will snap together instantly with a force of massive weight, destroying anything in their path. Exercise extreme caution!
Threat to navigation
An intense magnetic field interferes with the functioning of compasses in phones and GPS navigation. Maintain magnets near a smartphone to prevent breaking the sensors.
Do not give to children
These products are not toys. Swallowing multiple magnets can lead to them attracting across intestines, which constitutes a critical condition and requires immediate surgery.
Tabela kosztu i czasu dostawy
Płatność przed wysyłką:
GLS kurier
Przesyłka będzie u Ciebie za 2-3 dni
14.99 ZŁ
InPost Paczkomaty 24/7
Przesyłka będzie u Ciebie za 1-2 dni
12.30 ZŁ
Płatność przy odbiorze (pobranie):
GLS kurier
Przesyłka będzie u Ciebie za 1-2 dni
23.00 ZŁ
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