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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Parameters along with structure of a neodymium magnet can be checked on our
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Technical of the product - 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 |
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 and cons of rare earth magnets.
Strengths
- Their power is maintained, and after around 10 years it decreases only by ~1% (theoretically),
- Neodymium magnets prove to be highly resistant to magnetic field loss caused by external field sources,
- In other words, due to the reflective surface of nickel, the element gains visual value,
- Magnetic induction on the working part of the magnet turns out to be strong,
- Due to their durability and thermal resistance, neodymium magnets are capable of operate (depending on the form) even at high temperatures reaching 230°C or more...
- Thanks to modularity in forming and the capacity to customize to complex applications,
- Fundamental importance in future technologies – they serve a role in data components, brushless drives, medical devices, as well as industrial machines.
- Thanks to their power density, small magnets offer high operating force, with minimal size,
Weaknesses
- 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 strength 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 durability even at temperatures up to 230°C
- They rust in a humid environment - during use outdoors we suggest using waterproof magnets e.g. in rubber, plastic
- We suggest casing - magnetic holder, due to difficulties in creating nuts inside the magnet and complex forms.
- Potential hazard resulting from small fragments of magnets pose a threat, if swallowed, which is particularly important in the aspect of protecting the youngest. Additionally, small components of these products can complicate diagnosis medical when they are in the body.
- High unit price – neodymium magnets are more expensive than other types of magnets (e.g. ferrite), which can limit application in large quantities
Lifting parameters
Breakaway strength of the magnet in ideal conditions – what affects it?
- on a base made of structural steel, effectively closing the magnetic field
- with a cross-section minimum 10 mm
- with a plane free of scratches
- without the slightest air gap between the magnet and steel
- under vertical force vector (90-degree angle)
- at room temperature
What influences lifting capacity in practice
- Air gap (between the magnet and the metal), because even a very small distance (e.g. 0.5 mm) results in a decrease in lifting capacity by up to 50% (this also applies to paint, corrosion or dirt).
- Angle of force application – highest force is reached only during pulling at a 90° angle. The shear force of the magnet along the plate is standardly many times lower (approx. 1/5 of the lifting capacity).
- Substrate thickness – for full efficiency, the steel must be sufficiently thick. Thin sheet limits the attraction force (the magnet "punches through" it).
- Steel grade – ideal substrate is pure iron steel. Stainless steels may generate lower lifting capacity.
- Surface structure – the more even the surface, the larger the contact zone and stronger the hold. Unevenness creates an air distance.
- Thermal environment – temperature increase results in weakening of induction. It is worth remembering the thermal limit for a given model.
Lifting capacity was determined using a steel plate with a smooth surface of optimal thickness (min. 20 mm), under vertically applied force, whereas under attempts to slide the magnet the lifting capacity is smaller. Moreover, even a small distance between the magnet’s surface and the plate reduces the lifting capacity.
Safety rules for work with NdFeB magnets
Allergy Warning
Medical facts indicate that the nickel plating (standard magnet coating) is a potent allergen. For allergy sufferers, prevent direct skin contact or opt for versions in plastic housing.
Powerful field
Before starting, read the rules. Uncontrolled attraction can destroy the magnet or injure your hand. Think ahead.
Pacemakers
People with a pacemaker should maintain an large gap from magnets. The magnetic field can disrupt the operation of the implant.
Permanent damage
Control the heat. Exposing the magnet to high heat will ruin its magnetic structure and pulling force.
Hand protection
Danger of trauma: The attraction force is so great that it can result in blood blisters, crushing, and broken bones. Protective gloves are recommended.
Choking Hazard
NdFeB magnets are not toys. Accidental ingestion of a few magnets may result in them connecting inside the digestive tract, which poses a direct threat to life and necessitates immediate surgery.
Eye protection
NdFeB magnets are sintered ceramics, meaning they are fragile like glass. Impact of two magnets will cause them breaking into small pieces.
Threat to electronics
Device Safety: Neodymium magnets can ruin payment cards and delicate electronics (pacemakers, medical aids, mechanical watches).
Dust is flammable
Combustion risk: Neodymium dust is explosive. Do not process magnets without safety gear as this may cause fire.
GPS and phone interference
An intense magnetic field interferes with the operation of magnetometers in phones and GPS navigation. Do not bring magnets close to a device to avoid breaking the sensors.
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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