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AM ucho małe [M8] - magnetic accessories
magnetic accessories
Catalog no 080345
GTIN/EAN: 5906301812487
- Weight
- 27 g
How we measure these parameters — certificates and measurements
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4.92 zł with VAT (23% VAT) / pcs
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Specifications and structure of a neodymium magnet can be estimated using our
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Detailed specification - AM ucho małe [M8] - magnetic accessories
Specification / characteristics - AM ucho małe [M8] - magnetic accessories
| properties | values |
|---|---|
| Cat. no. | 080345 |
| GTIN/EAN | 5906301812487 |
| Production/Distribution | Dhit sp. z o.o. |
| Country of origin | Poland / China / Germany |
| Customs code | 85059029 |
| Weight | 27 g |
| Load capacity ~ ? | 240.00 kg / 2353.60 N |
| 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 | 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 |
Material specification
| 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% |
Environmental data
| recyclability (EoL) | 100% |
| recycled raw materials | ~10% (pre-cons) |
| carbon footprint | low / zredukowany |
| waste code (EWC) | 16 02 16 |
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Advantages and disadvantages of neodymium magnets.
Advantages
- Their strength is durable, and after around 10 years it drops only by ~1% (according to research),
- They possess excellent resistance to magnetic field loss when exposed to opposing magnetic fields,
- By covering with a shiny layer of gold, the element has an aesthetic look,
- Magnets have extremely high magnetic induction on the outer side,
- Through (adequate) combination of ingredients, they can achieve high thermal strength, allowing for functioning at temperatures approaching 230°C and above...
- Possibility of detailed forming as well as adjusting to defined requirements,
- Versatile presence in advanced technology sectors – they find application in magnetic memories, electromotive mechanisms, precision medical tools, as well as modern systems.
- Compactness – despite small sizes they offer powerful magnetic field, making them ideal for precision applications
Limitations
- They are prone to damage upon heavy impacts. To avoid cracks, it is worth securing magnets in special housings. Such protection not only protects the magnet but also improves its resistance to damage
- We warn that neodymium magnets can lose their power at high temperatures. To prevent this, we suggest our specialized [AH] magnets, which work effectively even at 230°C.
- Magnets exposed to a humid environment can rust. Therefore during using outdoors, we suggest using water-impermeable magnets made of rubber, plastic or other material resistant to moisture
- Due to limitations in producing nuts and complex forms in magnets, we propose using a housing - magnetic holder.
- Possible danger resulting from small fragments of magnets can be dangerous, in case of ingestion, which becomes key in the aspect of protecting the youngest. It is also worth noting that tiny parts of these magnets can be problematic in diagnostics medical when they are in the body.
- Due to expensive raw materials, their price is relatively high,
Pull force analysis
Maximum holding power of the magnet – what it depends on?
- with the use of a sheet made of special test steel, guaranteeing full magnetic saturation
- with a cross-section no less than 10 mm
- with an ideally smooth touching surface
- without the slightest air gap between the magnet and steel
- for force applied at a right angle (in the magnet axis)
- in temp. approx. 20°C
Lifting capacity in practice – influencing factors
- Clearance – existence of any layer (rust, tape, air) acts as an insulator, which reduces capacity rapidly (even by 50% at 0.5 mm).
- Direction of force – maximum parameter is reached only during pulling at a 90° angle. The force required to slide of the magnet along the surface is usually several times lower (approx. 1/5 of the lifting capacity).
- Wall thickness – thin material does not allow full use of the magnet. Magnetic flux penetrates through instead of converting into lifting capacity.
- Material composition – not every steel reacts the same. High carbon content weaken the interaction with the magnet.
- Smoothness – full contact is possible only on smooth steel. Rough texture reduce the real contact area, reducing force.
- Thermal conditions – NdFeB sinters have a sensitivity to temperature. At higher temperatures they are weaker, and at low temperatures gain strength (up to a certain limit).
Holding force was checked on a smooth steel plate of 20 mm thickness, when the force acted perpendicularly, in contrast under attempts to slide the magnet the holding force is lower. Moreover, even a minimal clearance between the magnet and the plate decreases the lifting capacity.
Precautions when working with NdFeB magnets
Danger to the youngest
Absolutely keep magnets out of reach of children. Risk of swallowing is significant, and the effects of magnets connecting inside the body are life-threatening.
GPS and phone interference
Be aware: neodymium magnets produce a field that confuses sensitive sensors. Keep a separation from your phone, device, and GPS.
Risk of cracking
Neodymium magnets are sintered ceramics, meaning they are very brittle. Collision of two magnets leads to them cracking into small pieces.
Data carriers
Data protection: Neodymium magnets can ruin payment cards and delicate electronics (pacemakers, medical aids, mechanical watches).
Warning for allergy sufferers
Certain individuals experience a sensitization to Ni, which is the standard coating for NdFeB magnets. Extended handling might lead to skin redness. We strongly advise wear protective gloves.
Dust is flammable
Dust created during machining of magnets is combustible. Avoid drilling into magnets without proper cooling and knowledge.
Life threat
Patients with a ICD have to keep an large gap from magnets. The magnetism can stop the functioning of the life-saving device.
Crushing force
Big blocks can crush fingers instantly. Do not place your hand betwixt two attracting surfaces.
Immense force
Before use, read the rules. Sudden snapping can break the magnet or injure your hand. Think ahead.
Thermal limits
Regular neodymium magnets (N-type) lose magnetization when the temperature goes above 80°C. The loss of strength is permanent.
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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