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BM 850x180x70 [4x M8] - magnetic beam
magnetic beam
Catalog no 090224
GTIN/EAN: 5906301812593
length
850 mm [±1 mm]
Width
180 mm [±1 mm]
Height
70 mm [±1 mm]
Weight
54590 g
7729.93 ZŁ with VAT / pcs + price for transport
6284.50 ZŁ net + 23% VAT / pcs
bulk discounts:
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Weight as well as appearance of neodymium magnets can be checked on our
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Detailed specification - BM 850x180x70 [4x M8] - magnetic beam
Specification / characteristics - BM 850x180x70 [4x M8] - magnetic beam
| properties | values |
|---|---|
| Cat. no. | 090224 |
| GTIN/EAN | 5906301812593 |
| Production/Distribution | Dhit sp. z o.o. |
| Country of origin | Poland / China / Germany |
| Customs code | 85059029 |
| length | 850 mm [±1 mm] |
| Width | 180 mm [±1 mm] |
| Height | 70 mm [±1 mm] |
| Weight | 54590 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 |
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Pros and cons of neodymium magnets.
Advantages
- They retain attractive force for around 10 years – the loss is just ~1% (in theory),
- They are resistant to demagnetization induced by external disturbances,
- A magnet with a metallic nickel surface looks better,
- They feature high magnetic induction at the operating surface, which increases their power,
- Due to their durability and thermal resistance, neodymium magnets can operate (depending on the shape) even at high temperatures reaching 230°C or more...
- Thanks to modularity in forming and the capacity to adapt to specific needs,
- Versatile presence in advanced technology sectors – they are utilized in hard drives, drive modules, diagnostic systems, as well as industrial machines.
- Compactness – despite small sizes they offer powerful magnetic field, making them ideal for precision applications
Limitations
- At very strong impacts they can break, therefore we advise placing them in special holders. A metal housing provides additional protection against damage, as well as increases the magnet's durability.
- Neodymium magnets decrease their force 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 durability even at temperatures up to 230°C
- They oxidize in a humid environment. For use outdoors we recommend using waterproof magnets e.g. in rubber, plastic
- We suggest a housing - magnetic mechanism, due to difficulties in realizing nuts inside the magnet and complicated shapes.
- Health risk to health – tiny shards of magnets are risky, when accidentally swallowed, which gains importance in the aspect of protecting the youngest. Additionally, small components of these devices can be problematic in diagnostics medical after entering the body.
- Higher cost of purchase is a significant factor to consider compared to ceramic magnets, especially in budget applications
Pull force analysis
Maximum lifting force for a neodymium magnet – what affects it?
- with the use of a yoke made of low-carbon steel, ensuring full magnetic saturation
- possessing a massiveness of at least 10 mm to avoid saturation
- with an polished contact surface
- under conditions of gap-free contact (surface-to-surface)
- for force applied at a right angle (in the magnet axis)
- in temp. approx. 20°C
Practical lifting capacity: influencing factors
- Space between surfaces – even a fraction of a millimeter of distance (caused e.g. by varnish or unevenness) significantly weakens the pulling force, often by half at just 0.5 mm.
- Load vector – maximum parameter is reached only during pulling at a 90° angle. The force required to slide of the magnet along the plate is standardly many times lower (approx. 1/5 of the lifting capacity).
- Element thickness – to utilize 100% power, the steel must be sufficiently thick. Thin sheet limits the attraction force (the magnet "punches through" it).
- Steel grade – ideal substrate is pure iron steel. Cast iron may attract less.
- Surface finish – full contact is obtained only on smooth steel. Any scratches and bumps create air cushions, weakening the magnet.
- Operating temperature – NdFeB sinters have a sensitivity to temperature. When it is hot they are weaker, and in frost they can be stronger (up to a certain limit).
Holding force was measured on a smooth steel plate of 20 mm thickness, when the force acted perpendicularly, however under parallel forces the load capacity is reduced by as much as 75%. Additionally, even a slight gap between the magnet and the plate lowers the load capacity.
Precautions when working with neodymium magnets
This is not a toy
Neodymium magnets are not toys. Eating several magnets can lead to them connecting inside the digestive tract, which constitutes a critical condition and requires urgent medical intervention.
Allergic reactions
Some people experience a sensitization to nickel, which is the common plating for NdFeB magnets. Extended handling can result in an allergic reaction. We strongly advise wear protective gloves.
Precision electronics
Remember: neodymium magnets produce a field that confuses precision electronics. Maintain a separation from your phone, tablet, and GPS.
Fragile material
Neodymium magnets are ceramic materials, meaning they are very brittle. Collision of two magnets leads to them breaking into shards.
Machining danger
Fire warning: Rare earth powder is highly flammable. Avoid machining magnets without safety gear as this risks ignition.
Data carriers
Very strong magnetic fields can erase data on credit cards, HDDs, and other magnetic media. Maintain a gap of at least 10 cm.
Caution required
Handle magnets consciously. Their huge power can surprise even experienced users. Plan your moves and do not underestimate their power.
Maximum temperature
Keep cool. NdFeB magnets are susceptible to temperature. If you require resistance above 80°C, ask us about HT versions (H, SH, UH).
Warning for heart patients
Individuals with a heart stimulator should keep an absolute distance from magnets. The magnetic field can stop the functioning of the life-saving device.
Bodily injuries
Risk of injury: The pulling power is so immense that it can cause blood blisters, crushing, and even bone fractures. Use thick gloves.
Tabela kosztu i czasu dostawy
Płatność przed wysyłką:
GLS kurier
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14.99 ZŁ
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12.30 ZŁ
Płatność przy odbiorze (pobranie):
GLS kurier
Przesyłka będzie u Ciebie za 1-2 dni
23.00 ZŁ
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