JM 18x60 - jajka bez pudełka/cena za parę - magnetic eggs
magnetic eggs
Catalog no 270213
GTIN/EAN: 5906301814412
Weight
83 g
8.99 ZŁ with VAT / pcs + price for transport
7.31 ZŁ net + 23% VAT / pcs
bulk discounts:
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Physical properties - JM 18x60 - jajka bez pudełka/cena za parę - magnetic eggs
Specification / characteristics - JM 18x60 - jajka bez pudełka/cena za parę - magnetic eggs
| properties | values |
|---|---|
| Cat. no. | 270213 |
| GTIN/EAN | 5906301814412 |
| Production/Distribution | Dhit sp. z o.o. |
| Country of origin | Poland / China / Germany |
| Customs code | 85059029 |
| Weight | 83 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 |
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% |
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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Advantages as well as disadvantages of rare earth magnets.
Advantages
- Their magnetic field is maintained, and after around 10 years it decreases only by ~1% (theoretically),
- Magnets very well defend themselves against loss of magnetization caused by foreign field sources,
- The use of an refined finish of noble metals (nickel, gold, silver) causes the element to look better,
- Magnets exhibit impressive magnetic induction on the active area,
- Made from properly selected components, these magnets show impressive resistance to high heat, enabling them to function (depending on their shape) at temperatures up to 230°C and above...
- Thanks to versatility in designing and the capacity to customize to individual projects,
- Versatile presence in innovative solutions – they find application in magnetic memories, electric motors, precision medical tools, and complex engineering applications.
- Compactness – despite small sizes they provide effective action, making them ideal for precision applications
Disadvantages
- At strong impacts they can crack, therefore we recommend placing them in steel cases. A metal housing provides additional protection against damage, as well as increases the magnet's durability.
- NdFeB magnets lose force when exposed to high temperatures. After reaching 80°C, many of them experience permanent weakening of strength (a factor is the shape as well as dimensions of the magnet). We offer magnets specially adapted to work at temperatures up to 230°C marked [AH], which are extremely resistant to heat
- Due to the susceptibility of magnets to corrosion in a humid environment, we suggest using waterproof magnets made of rubber, plastic or other material immune to moisture, in case of application outdoors
- Limited ability of making threads in the magnet and complicated forms - recommended is a housing - magnetic holder.
- Health risk to health – tiny shards of magnets can be dangerous, if swallowed, which is particularly important in the context of child safety. Furthermore, tiny parts of these devices can complicate diagnosis medical in case of swallowing.
- Due to complex production process, their price is higher than average,
Holding force characteristics
Maximum lifting capacity of the magnet – what it depends on?
- using a sheet made of high-permeability steel, acting as a magnetic yoke
- possessing a massiveness of minimum 10 mm to ensure full flux closure
- characterized by even structure
- with zero gap (no impurities)
- under axial force vector (90-degree angle)
- at temperature room level
Impact of factors on magnetic holding capacity in practice
- Distance (between the magnet and the metal), because even a tiny distance (e.g. 0.5 mm) can cause a reduction in lifting capacity by up to 50% (this also applies to paint, rust or dirt).
- Direction of force – highest force is reached only during pulling at a 90° angle. The shear force of the magnet along the plate is standardly many times smaller (approx. 1/5 of the lifting capacity).
- Element thickness – for full efficiency, the steel must be sufficiently thick. Paper-thin metal limits the lifting capacity (the magnet "punches through" it).
- Material type – ideal substrate is pure iron steel. Hardened steels may attract less.
- Smoothness – full contact is obtained only on smooth steel. Rough texture create air cushions, reducing force.
- Operating temperature – neodymium magnets have a negative temperature coefficient. When it is hot they are weaker, and at low temperatures they can be stronger (up to a certain limit).
Holding force was tested on a smooth steel plate of 20 mm thickness, when the force acted perpendicularly, whereas under shearing force the lifting capacity is smaller. Additionally, even a slight gap between the magnet’s surface and the plate reduces the holding force.
Safe handling of NdFeB magnets
Do not overheat magnets
Standard neodymium magnets (grade N) lose magnetization when the temperature goes above 80°C. This process is irreversible.
Keep away from computers
Avoid bringing magnets close to a wallet, computer, or screen. The magnetism can irreversibly ruin these devices and erase data from cards.
Fragile material
Despite the nickel coating, the material is brittle and not impact-resistant. Do not hit, as the magnet may crumble into sharp, dangerous pieces.
Avoid contact if allergic
Allergy Notice: The Ni-Cu-Ni coating contains nickel. If skin irritation occurs, cease handling magnets and wear gloves.
Bone fractures
Danger of trauma: The attraction force is so immense that it can result in hematomas, crushing, and even bone fractures. Protective gloves are recommended.
Health Danger
Warning for patients: Powerful magnets affect medical devices. Keep at least 30 cm distance or request help to work with the magnets.
Phone sensors
An intense magnetic field negatively affects the operation of magnetometers in smartphones and navigation systems. Do not bring magnets close to a smartphone to prevent breaking the sensors.
Keep away from children
Only for adults. Small elements pose a choking risk, leading to severe trauma. Store out of reach of kids and pets.
Do not drill into magnets
Dust created during machining of magnets is flammable. Do not drill into magnets without proper cooling and knowledge.
Immense force
Before use, check safety instructions. Sudden snapping can break the magnet or injure your hand. Think ahead.
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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