JM 15x40 - jajka w pudełku/cena za parę - magnetic eggs
magnetic eggs
Catalog no 270212
GTIN/EAN: 5906301814405
5.69 zł net / pcs
7.00 zł with VAT (23% VAT) / pcs
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Need more?Frequently asked questions
Are these magnets safe for children?
What happens if a magnet is dropped on a hard floor?
Can magnets damage electronic equipment?
Guides from the knowledge base
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Specifications and structure of a neodymium magnet 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 | 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 |
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% |
Sustainability
| recyclability (EoL) | 100% |
| recycled raw materials | ~10% (pre-cons) |
| carbon footprint | low / zredukowany |
| waste code (EWC) | 16 02 16 |
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Pros as well as cons of neodymium magnets.
Benefits
- Their magnetic field is maintained, and after around ten years it decreases only by ~1% (theoretically),
- Neodymium magnets remain exceptionally resistant to loss of magnetic properties caused by external magnetic fields,
- Thanks to the shimmering finish, the coating of nickel, gold, or silver gives an visually attractive appearance,
- Magnets are distinguished by exceptionally strong magnetic induction on the active area,
- Neodymium magnets are characterized by very high magnetic induction on the magnet surface and can function (depending on the shape) even at a temperature of 230°C or more...
- Thanks to the ability of precise forming and adaptation to specialized projects, neodymium magnets can be modeled in a variety of shapes and sizes, which expands the range of possible applications,
- Huge importance in future technologies – they find application in computer drives, drive modules, advanced medical instruments, as well as industrial machines.
- Thanks to concentrated force, small magnets offer high operating force, occupying minimum space,
Cons
- At strong impacts they can crack, therefore we advise placing them in steel cases. A metal housing provides additional protection against damage and increases the magnet's durability.
- 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.
- Due to the susceptibility of magnets to corrosion in a humid environment, we recommend using waterproof magnets made of rubber, plastic or other material immune to moisture, when using outdoors
- Limited ability of creating threads in the magnet and complicated shapes - recommended is a housing - magnetic holder.
- Potential hazard to health – tiny shards of magnets pose a threat, if swallowed, which gains importance in the context of child safety. It is also worth noting that small elements of these magnets can disrupt the diagnostic process medical after entering the body.
- With budget limitations the cost of neodymium magnets is economically unviable,
Lifting parameters
Highest magnetic holding force – what it depends on?
- using a plate made of mild steel, functioning as a ideal flux conductor
- with a cross-section no less than 10 mm
- with an ideally smooth contact surface
- without any air gap between the magnet and steel
- during pulling in a direction perpendicular to the mounting surface
- at temperature room level
Magnet lifting force in use – key factors
- Gap (between the magnet and the plate), because even a tiny distance (e.g. 0.5 mm) results in a decrease in force by up to 50% (this also applies to paint, corrosion or dirt).
- Load vector – highest force is available only during pulling at a 90° angle. The force required to slide of the magnet along the plate is typically several times smaller (approx. 1/5 of the lifting capacity).
- Metal thickness – the thinner the sheet, the weaker the hold. Part of the magnetic field passes through the material instead of converting into lifting capacity.
- Chemical composition of the base – low-carbon steel gives the best results. Alloy admixtures reduce magnetic properties and lifting capacity.
- Base smoothness – the more even the plate, the larger the contact zone and stronger the hold. Unevenness acts like micro-gaps.
- Temperature influence – hot environment weakens magnetic field. Too high temperature can permanently demagnetize the magnet.
Lifting capacity testing was carried out on a smooth plate of suitable thickness, under a perpendicular pulling force, however under parallel forces the lifting capacity is smaller. In addition, even a minimal clearance between the magnet and the plate decreases the load capacity.
H&S for magnets
Magnetic interference
Remember: rare earth magnets produce a field that disrupts precision electronics. Maintain a separation from your mobile, tablet, and GPS.
Dust explosion hazard
Machining of NdFeB material poses a fire risk. Magnetic powder oxidizes rapidly with oxygen and is hard to extinguish.
Warning for allergy sufferers
Nickel alert: The Ni-Cu-Ni coating consists of nickel. If redness occurs, immediately stop working with magnets and wear gloves.
Shattering risk
Beware of splinters. Magnets can explode upon violent connection, ejecting shards into the air. Eye protection is mandatory.
Electronic devices
Intense magnetic fields can destroy records on credit cards, HDDs, and storage devices. Stay away of min. 10 cm.
Warning for heart patients
Medical warning: Strong magnets can deactivate pacemakers and defibrillators. Do not approach if you have electronic implants.
Heat sensitivity
Keep cool. Neodymium magnets are sensitive to temperature. If you need operation above 80°C, ask us about special high-temperature series (H, SH, UH).
Physical harm
Danger of trauma: The attraction force is so great that it can result in hematomas, pinching, and even bone fractures. Protective gloves are recommended.
Safe operation
Be careful. Neodymium magnets attract from a long distance and connect with massive power, often faster than you can move away.
No play value
These products are not toys. Swallowing a few magnets can lead to them connecting inside the digestive tract, which constitutes a critical condition and requires immediate surgery.
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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