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AM ucho [M8] - magnetic accessories
magnetic accessories
Catalog no 080268
GTIN/EAN: 5906301812470
Weight
53 g
Load capacity
240.00 kg / 2353.60 N
4.92 ZŁ with VAT / pcs + price for transport
4.00 ZŁ net + 23% VAT / pcs
bulk discounts:
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Parameters as well as appearance of a neodymium magnet can be calculated on our
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Technical specification of the product - AM ucho [M8] - magnetic accessories
Specification / characteristics - AM ucho [M8] - magnetic accessories
| properties | values |
|---|---|
| Cat. no. | 080268 |
| GTIN/EAN | 5906301812470 |
| Production/Distribution | Dhit sp. z o.o. |
| Country of origin | Poland / China / Germany |
| Customs code | 85059029 |
| Weight | 53 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 | 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 |
Elemental analysis
| 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% |
Ecology and recycling (GPSR)
| recyclability (EoL) | 100% |
| recycled raw materials | ~10% (pre-cons) |
| carbon footprint | low / zredukowany |
| waste code (EWC) | 16 02 16 |
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Strengths as well as weaknesses of Nd2Fe14B magnets.
Benefits
- They retain attractive force for nearly ten years – the loss is just ~1% (based on simulations),
- They have excellent resistance to magnetic field loss as a result of opposing magnetic fields,
- By covering with a lustrous layer of nickel, the element has an modern look,
- Neodymium magnets ensure maximum magnetic induction on a their surface, which allows for strong attraction,
- Due to their durability and thermal resistance, neodymium magnets are capable of operate (depending on the shape) even at high temperatures reaching 230°C or more...
- Thanks to freedom in constructing and the capacity to modify to specific needs,
- Universal use in innovative solutions – they find application in hard drives, drive modules, advanced medical instruments, also modern systems.
- Compactness – despite small sizes they provide effective action, making them ideal for precision applications
Limitations
- They are prone to damage upon heavy impacts. To avoid cracks, it is worth securing magnets in a protective case. Such protection not only protects the magnet but also improves its resistance to damage
- Neodymium magnets lose 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 stability even at temperatures up to 230°C
- Magnets exposed to a humid environment can corrode. Therefore during using outdoors, we advise using waterproof magnets made of rubber, plastic or other material resistant to moisture
- Limited ability of creating nuts in the magnet and complex forms - preferred is casing - mounting mechanism.
- Potential hazard related to microscopic parts of magnets are risky, when accidentally swallowed, which gains importance in the context of child health protection. Additionally, small components of these magnets are able to be problematic in diagnostics medical in case of swallowing.
- Higher cost of purchase is one of the disadvantages compared to ceramic magnets, especially in budget applications
Holding force characteristics
Maximum magnetic pulling force – what affects it?
- using a base made of low-carbon steel, acting as a ideal flux conductor
- possessing a massiveness of minimum 10 mm to ensure full flux closure
- characterized by lack of roughness
- without any air gap between the magnet and steel
- for force acting at a right angle (pull-off, not shear)
- at room temperature
Magnet lifting force in use – key factors
- Clearance – existence of foreign body (paint, dirt, gap) acts as an insulator, which lowers power steeply (even by 50% at 0.5 mm).
- Load vector – maximum parameter is reached only during perpendicular pulling. The force required to slide of the magnet along the surface is standardly many times smaller (approx. 1/5 of the lifting capacity).
- Element thickness – for full efficiency, the steel must be adequately massive. Thin sheet limits the lifting capacity (the magnet "punches through" it).
- Chemical composition of the base – mild steel attracts best. Alloy steels reduce magnetic properties and holding force.
- Surface finish – full contact is obtained only on polished steel. Any scratches and bumps create air cushions, reducing force.
- Heat – neodymium magnets have a negative temperature coefficient. At higher temperatures they lose power, and at low temperatures they can be stronger (up to a certain limit).
Lifting capacity was assessed by applying a steel plate with a smooth surface of suitable thickness (min. 20 mm), under perpendicular pulling force, in contrast under attempts to slide the magnet the holding force is lower. Additionally, even a slight gap between the magnet’s surface and the plate decreases the lifting capacity.
Precautions when working with neodymium magnets
Safe distance
Data protection: Neodymium magnets can damage data carriers and sensitive devices (heart implants, hearing aids, mechanical watches).
Medical interference
Health Alert: Strong magnets can turn off pacemakers and defibrillators. Stay away if you have medical devices.
Bodily injuries
Danger of trauma: The pulling power is so great that it can result in blood blisters, pinching, and even bone fractures. Use thick gloves.
Eye protection
Despite metallic appearance, the material is brittle and cannot withstand shocks. Avoid impacts, as the magnet may crumble into hazardous fragments.
Machining danger
Dust produced during grinding of magnets is self-igniting. Do not drill into magnets unless you are an expert.
Thermal limits
Standard neodymium magnets (grade N) lose power when the temperature surpasses 80°C. Damage is permanent.
Danger to the youngest
Strictly keep magnets out of reach of children. Choking hazard is high, and the effects of magnets connecting inside the body are fatal.
Nickel coating and allergies
Medical facts indicate that the nickel plating (standard magnet coating) is a potent allergen. If your skin reacts to metals, avoid direct skin contact or opt for coated magnets.
Conscious usage
Before starting, check safety instructions. Uncontrolled attraction can break the magnet or injure your hand. Be predictive.
GPS Danger
Navigation devices and smartphones are extremely sensitive to magnetism. Close proximity with a powerful NdFeB magnet can ruin the internal compass in your phone.
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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