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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Technical data - 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 |
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 Nd2Fe14B magnets.
Advantages
- They retain magnetic properties for nearly 10 years – the drop is just ~1% (in theory),
- Magnets very well protect themselves against demagnetization caused by external fields,
- The use of an aesthetic coating of noble metals (nickel, gold, silver) causes the element to look better,
- Neodymium magnets deliver maximum magnetic induction on a small surface, which allows for strong attraction,
- Neodymium magnets are characterized by extremely high magnetic induction on the magnet surface and can function (depending on the form) even at a temperature of 230°C or more...
- Possibility of individual forming as well as adapting to defined needs,
- Wide application in modern technologies – they find application in magnetic memories, electromotive mechanisms, precision medical tools, also multitasking production systems.
- Relatively small size with high pulling force – neodymium magnets offer high power in tiny dimensions, which enables their usage in small systems
Limitations
- They are fragile upon heavy impacts. To avoid cracks, it is worth securing magnets in a protective case. Such protection not only protects the magnet but also increases its resistance to damage
- 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.
- They rust in a humid environment - during use outdoors we recommend using waterproof magnets e.g. in rubber, plastic
- Due to limitations in producing threads and complex forms in magnets, we recommend using casing - magnetic mount.
- Health risk related to microscopic parts of magnets can be dangerous, in case of ingestion, which becomes key in the context of child safety. It is also worth noting that small elements of these magnets can complicate diagnosis medical after entering the body.
- Due to expensive raw materials, their price is higher than average,
Lifting parameters
Breakaway strength of the magnet in ideal conditions – what contributes to it?
- with the use of a sheet made of low-carbon steel, ensuring full magnetic saturation
- with a thickness minimum 10 mm
- characterized by smoothness
- with direct contact (without impurities)
- during pulling in a direction perpendicular to the plane
- in neutral thermal conditions
Practical lifting capacity: influencing factors
- Clearance – the presence of any layer (rust, tape, air) interrupts the magnetic circuit, which reduces capacity steeply (even by 50% at 0.5 mm).
- Loading method – declared lifting capacity refers to pulling vertically. When attempting to slide, the magnet holds significantly lower power (typically approx. 20-30% of maximum force).
- Plate thickness – too thin steel causes magnetic saturation, causing part of the power to be lost into the air.
- Steel grade – ideal substrate is high-permeability steel. Hardened steels may generate lower lifting capacity.
- Surface structure – the smoother and more polished the surface, the larger the contact zone and higher the lifting capacity. Unevenness acts like micro-gaps.
- Thermal factor – hot environment reduces pulling force. Exceeding the limit temperature can permanently damage the magnet.
Lifting capacity testing was carried out on plates with a smooth surface of optimal thickness, under perpendicular forces, however under shearing force the lifting capacity is smaller. Moreover, even a minimal clearance between the magnet and the plate lowers the load capacity.
H&S for magnets
Serious injuries
Danger of trauma: The pulling power is so immense that it can result in hematomas, crushing, and even bone fractures. Use thick gloves.
Metal Allergy
Nickel alert: The Ni-Cu-Ni coating contains nickel. If an allergic reaction appears, immediately stop working with magnets and use protective gear.
Precision electronics
A powerful magnetic field interferes with the functioning of magnetometers in smartphones and navigation systems. Keep magnets close to a smartphone to avoid damaging the sensors.
Handling rules
Before use, check safety instructions. Uncontrolled attraction can break the magnet or hurt your hand. Be predictive.
Heat sensitivity
Regular neodymium magnets (N-type) lose magnetization when the temperature surpasses 80°C. Damage is permanent.
Dust explosion hazard
Dust created during cutting of magnets is self-igniting. Do not drill into magnets without proper cooling and knowledge.
Swallowing risk
Product intended for adults. Tiny parts can be swallowed, causing serious injuries. Keep away from children and animals.
Fragile material
Despite metallic appearance, the material is brittle and cannot withstand shocks. Do not hit, as the magnet may shatter into sharp, dangerous pieces.
Protect data
Powerful magnetic fields can destroy records on credit cards, hard drives, and storage devices. Maintain a gap of at least 10 cm.
Danger to pacemakers
Warning for patients: Powerful magnets affect medical devices. Keep minimum 30 cm distance or request help to handle the magnets.
Tabela kosztu i czasu dostawy
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