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
bulk discounts:
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Lifting power and appearance of a magnet can be analyzed with our
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Product card - 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 |
Chemical composition
| 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 |
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Strengths and weaknesses of rare earth magnets.
Advantages
- Their magnetic field remains stable, and after around 10 years it decreases only by ~1% (theoretically),
- Neodymium magnets prove to be highly resistant to demagnetization caused by external magnetic fields,
- In other words, due to the aesthetic layer of gold, the element gains visual value,
- Neodymium magnets ensure maximum magnetic induction on a small area, which allows for strong attraction,
- Through (adequate) combination of ingredients, they can achieve high thermal resistance, enabling operation at temperatures reaching 230°C and above...
- Possibility of detailed machining and optimizing to defined applications,
- Key role in modern industrial fields – they are utilized in hard drives, brushless drives, medical devices, as well as multitasking production systems.
- Thanks to their power density, small magnets offer high operating force, with minimal size,
Cons
- At very strong impacts they can break, therefore we advise placing them in strong housings. 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 advise our specialized [AH] magnets, which work effectively even at 230°C.
- When exposed to humidity, magnets start to rust. For applications outside, it is recommended to use protective magnets, such as those in rubber or plastics, which secure oxidation as well as corrosion.
- Limited possibility of producing nuts in the magnet and complicated forms - recommended is a housing - magnet mounting.
- Potential hazard to health – tiny shards of magnets can be dangerous, when accidentally swallowed, which becomes key in the context of child safety. Furthermore, tiny parts of these devices can disrupt the diagnostic process medical when they are in the body.
- With budget limitations the cost of neodymium magnets can be a barrier,
Lifting parameters
Detachment force of the magnet in optimal conditions – what contributes to it?
- with the application of a sheet made of special test steel, ensuring maximum field concentration
- possessing a thickness of at least 10 mm to avoid saturation
- with an ground touching surface
- without the slightest clearance between the magnet and steel
- during detachment in a direction vertical to the plane
- at temperature room level
Determinants of practical lifting force of a magnet
- Distance (betwixt the magnet and the plate), as even a tiny distance (e.g. 0.5 mm) results in a decrease in lifting capacity by up to 50% (this also applies to paint, corrosion or debris).
- Force direction – declared lifting capacity refers to pulling vertically. When slipping, the magnet exhibits significantly lower power (typically approx. 20-30% of nominal force).
- Base massiveness – too thin sheet does not close the flux, causing part of the flux to be lost into the air.
- Steel grade – the best choice is high-permeability steel. Stainless steels may have worse magnetic properties.
- Surface condition – smooth surfaces ensure maximum contact, which increases force. Rough surfaces reduce efficiency.
- Thermal factor – hot environment weakens pulling force. Too high temperature can permanently demagnetize the magnet.
Lifting capacity testing was performed on a smooth plate of optimal thickness, under a perpendicular pulling force, however under parallel forces the holding force is lower. Additionally, even a minimal clearance between the magnet and the plate lowers the load capacity.
Warnings
Hand protection
Large magnets can break fingers instantly. Do not place your hand betwixt two attracting surfaces.
Impact on smartphones
A strong magnetic field disrupts the operation of compasses in smartphones and navigation systems. Maintain magnets near a device to avoid damaging the sensors.
Avoid contact if allergic
Studies show that nickel (the usual finish) is a strong allergen. If you have an allergy, avoid direct skin contact or opt for encased magnets.
Pacemakers
Patients with a pacemaker must maintain an large gap from magnets. The magnetic field can stop the functioning of the life-saving device.
Powerful field
Before use, check safety instructions. Uncontrolled attraction can destroy the magnet or hurt your hand. Be predictive.
Danger to the youngest
Only for adults. Tiny parts can be swallowed, causing severe trauma. Keep away from children and animals.
Safe distance
Intense magnetic fields can destroy records on credit cards, HDDs, and storage devices. Keep a distance of min. 10 cm.
Heat warning
Monitor thermal conditions. Exposing the magnet to high heat will ruin its properties and pulling force.
Fire risk
Fire hazard: Neodymium dust is highly flammable. Do not process magnets in home conditions as this risks ignition.
Risk of cracking
Neodymium magnets are ceramic materials, which means they are very brittle. Collision of two magnets leads to them cracking into shards.
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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