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
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Technical parameters - 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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Strengths and weaknesses of neodymium magnets.
Strengths
- Their magnetic field remains stable, and after around ten years it drops only by ~1% (theoretically),
- Neodymium magnets are exceptionally resistant to demagnetization caused by external field sources,
- By using a reflective layer of silver, the element presents an aesthetic look,
- Magnetic induction on the working part of the magnet turns out to be extremely intense,
- Due to their durability and thermal resistance, neodymium magnets can operate (depending on the shape) even at high temperatures reaching 230°C or more...
- In view of the possibility of free molding and customization to custom needs, NdFeB magnets can be created in a variety of forms and dimensions, which expands the range of possible applications,
- Wide application in innovative solutions – they are commonly used in mass storage devices, brushless drives, medical devices, also multitasking production systems.
- Compactness – despite small sizes they provide effective action, making them ideal for precision applications
Weaknesses
- Susceptibility to cracking is one of their disadvantages. Upon intense impact they can break. We advise keeping them in a strong case, which not only protects them against impacts but also increases their durability
- NdFeB magnets lose strength when exposed to high temperatures. After reaching 80°C, many of them experience permanent drop 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 very 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 resistant to moisture, when using outdoors
- Limited possibility of producing threads in the magnet and complicated forms - recommended is cover - magnet mounting.
- Health risk to health – tiny shards of magnets can be dangerous, in case of ingestion, which gains importance in the aspect of protecting the youngest. Furthermore, tiny parts of these magnets can be problematic in diagnostics medical when they are in the body.
- With budget limitations the cost of neodymium magnets can be a barrier,
Pull force analysis
Maximum holding power of the magnet – what it depends on?
- using a base made of high-permeability steel, acting as a circuit closing element
- possessing a thickness of at least 10 mm to ensure full flux closure
- characterized by lack of roughness
- without any air gap between the magnet and steel
- under vertical force direction (90-degree angle)
- in neutral thermal conditions
What influences lifting capacity in practice
- Clearance – the presence of foreign body (rust, tape, gap) interrupts the magnetic circuit, which reduces power rapidly (even by 50% at 0.5 mm).
- Loading method – declared lifting capacity refers to pulling vertically. When applying parallel force, the magnet exhibits much less (typically approx. 20-30% of maximum force).
- Base massiveness – insufficiently thick plate does not accept the full field, causing part of the flux to be wasted into the air.
- Steel grade – ideal substrate is high-permeability steel. Hardened steels may attract less.
- Surface finish – ideal contact is obtained only on smooth steel. Rough texture reduce the real contact area, weakening the magnet.
- Thermal environment – temperature increase causes a temporary drop of induction. It is worth remembering the thermal limit for a given model.
Lifting capacity testing was carried out on a smooth plate of optimal thickness, under a perpendicular pulling force, however under parallel forces the lifting capacity is smaller. Additionally, even a minimal clearance between the magnet and the plate reduces the lifting capacity.
Precautions when working with neodymium magnets
Swallowing risk
NdFeB magnets are not suitable for play. Swallowing multiple magnets may result in them pinching intestinal walls, which constitutes a direct threat to life and necessitates immediate surgery.
Shattering risk
Despite metallic appearance, neodymium is delicate and not impact-resistant. Do not hit, as the magnet may shatter into hazardous fragments.
Keep away from computers
Avoid bringing magnets near a purse, laptop, or screen. The magnetism can irreversibly ruin these devices and wipe information from cards.
Bone fractures
Large magnets can crush fingers in a fraction of a second. Do not put your hand betwixt two strong magnets.
Warning for allergy sufferers
Medical facts indicate that the nickel plating (the usual finish) is a strong allergen. For allergy sufferers, prevent direct skin contact and opt for encased magnets.
Operating temperature
Monitor thermal conditions. Exposing the magnet above 80 degrees Celsius will ruin its properties and strength.
Dust is flammable
Powder created during cutting of magnets is flammable. Do not drill into magnets without proper cooling and knowledge.
Keep away from electronics
A strong magnetic field disrupts the operation of magnetometers in phones and GPS navigation. Keep magnets near a smartphone to avoid damaging the sensors.
Do not underestimate power
Before use, check safety instructions. Uncontrolled attraction can destroy the magnet or injure your hand. Think ahead.
Health Danger
For implant holders: Strong magnetic fields disrupt electronics. Keep minimum 30 cm distance or ask another person to handle the magnets.
Tabela kosztu i czasu dostawy
Płatność przed wysyłką:
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Płatność przy odbiorze (pobranie):
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23.00 ZŁ
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