JM 15x40 - jajka w pudełku/cena za parę - magnetic eggs
magnetic eggs
Catalog no 270212
GTIN/EAN: 5906301814405
Weight
77 g
7.00 ZŁ with VAT / pcs + price for transport
5.69 ZŁ net + 23% VAT / pcs
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Force along with form of neodymium magnets can be estimated using our
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Technical details - JM 15x40 - jajka w pudełku/cena za parę - magnetic eggs
Specification / characteristics - JM 15x40 - jajka w pudełku/cena za parę - magnetic eggs
| properties | values |
|---|---|
| Cat. no. | 270212 |
| GTIN/EAN | 5906301814405 |
| Production/Distribution | Dhit sp. z o.o. |
| Country of origin | Poland / China / Germany |
| Customs code | 85059029 |
| Weight | 77 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% |
Environmental data
| recyclability (EoL) | 100% |
| recycled raw materials | ~10% (pre-cons) |
| carbon footprint | low / zredukowany |
| waste code (EWC) | 16 02 16 |
Other products
Advantages and disadvantages of rare earth magnets.
Advantages
- They virtually do not lose power, because even after ten years the performance loss is only ~1% (according to literature),
- They have excellent resistance to magnetism drop due to external fields,
- Thanks to the shiny finish, the coating of nickel, gold, or silver gives an aesthetic appearance,
- They show high magnetic induction at the operating surface, which improves attraction properties,
- Through (adequate) combination of ingredients, they can achieve high thermal strength, allowing for operation at temperatures reaching 230°C and above...
- Thanks to versatility in shaping and the capacity to adapt to individual projects,
- Universal use in future technologies – they serve a role in hard drives, electromotive mechanisms, precision medical tools, also complex engineering applications.
- Relatively small size with high pulling force – neodymium magnets offer impressive pulling force in small dimensions, which makes them useful in small systems
Cons
- Brittleness is one of their disadvantages. Upon strong impact they can fracture. We recommend keeping them in a steel housing, which not only protects them against impacts but also increases their durability
- We warn that neodymium magnets can lose their power at high temperatures. To prevent this, we recommend our specialized [AH] magnets, which work effectively even at 230°C.
- Magnets exposed to a humid environment can corrode. Therefore during using outdoors, we recommend using water-impermeable magnets made of rubber, plastic or other material resistant to moisture
- Due to limitations in producing threads and complicated shapes in magnets, we propose using cover - magnetic mount.
- Potential hazard to health – tiny shards of magnets are risky, if swallowed, which becomes key in the context of child health protection. Additionally, small elements of these magnets are able to complicate diagnosis medical after entering the body.
- With budget limitations the cost of neodymium magnets is economically unviable,
Pull force analysis
Maximum lifting capacity of the magnet – what affects it?
- with the contact of a sheet made of low-carbon steel, guaranteeing full magnetic saturation
- with a thickness minimum 10 mm
- characterized by smoothness
- under conditions of gap-free contact (metal-to-metal)
- during detachment in a direction vertical to the plane
- at temperature approx. 20 degrees Celsius
Determinants of practical lifting force of a magnet
- Gap between surfaces – every millimeter of distance (caused e.g. by varnish or unevenness) drastically reduces the pulling force, often by half at just 0.5 mm.
- Direction of force – maximum parameter is obtained only during perpendicular pulling. The force required to slide of the magnet along the plate is typically many times smaller (approx. 1/5 of the lifting capacity).
- Wall thickness – the thinner the sheet, the weaker the hold. Magnetic flux penetrates through instead of generating force.
- Material type – ideal substrate is high-permeability steel. Hardened steels may have worse magnetic properties.
- Smoothness – ideal contact is possible only on polished steel. Rough texture create air cushions, reducing force.
- Temperature – temperature increase causes a temporary drop of force. Check the thermal limit for a given model.
Lifting capacity testing was carried out on plates with a smooth surface of suitable thickness, under perpendicular forces, in contrast under parallel forces the lifting capacity is smaller. Additionally, even a slight gap between the magnet and the plate lowers the lifting capacity.
Safe handling of neodymium magnets
Handling guide
Exercise caution. Neodymium magnets act from a distance and snap with huge force, often faster than you can react.
Danger to the youngest
Neodymium magnets are not toys. Accidental ingestion of several magnets may result in them pinching intestinal walls, which poses a severe health hazard and necessitates urgent medical intervention.
Thermal limits
Monitor thermal conditions. Exposing the magnet to high heat will permanently weaken its magnetic structure and pulling force.
Serious injuries
Large magnets can break fingers instantly. Do not put your hand betwixt two strong magnets.
Danger to pacemakers
Medical warning: Strong magnets can turn off pacemakers and defibrillators. Do not approach if you have electronic implants.
Threat to electronics
Do not bring magnets near a wallet, laptop, or screen. The magnetic field can permanently damage these devices and erase data from cards.
Keep away from electronics
Navigation devices and smartphones are highly susceptible to magnetism. Close proximity with a powerful NdFeB magnet can permanently damage the sensors in your phone.
Dust explosion hazard
Combustion risk: Neodymium dust is highly flammable. Do not process magnets without safety gear as this may cause fire.
Beware of splinters
Protect your eyes. Magnets can fracture upon uncontrolled impact, ejecting shards into the air. Wear goggles.
Skin irritation risks
It is widely known that nickel (standard magnet coating) is a strong allergen. If you have an allergy, prevent touching magnets with bare hands or choose encased magnets.
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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