AM Magnetyczny zbieracz / N38 - magnetic accessories
magnetic accessories
Catalog no 080499
Magnetization Direction
↑ axial
Coating
[NiCuNi] Nickel
1.230 ZŁ with VAT / pcs + price for transport
1.000 ZŁ net + 23% VAT / pcs
bulk discounts:
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Strength as well as shape of a neodymium magnet can be checked using our
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Product card - AM Magnetyczny zbieracz / N38 - magnetic accessories
Specification / characteristics - AM Magnetyczny zbieracz / N38 - magnetic accessories
| properties | values |
|---|---|
| Cat. no. | 080499 |
| Production/Distribution | Dhit sp. z o.o. |
| Country of origin | Poland / China / Germany |
| Customs code | 85059029 |
| Magnetization Direction | ↑ axial |
| Coating | [NiCuNi] Nickel |
| Manufacturing Tolerance | ±1 mm |
Magnetic properties of material N38
| properties | values | units |
|---|---|---|
| remenance Br [min. - max.] ? | 12.2-12.6 | kGs |
| remenance Br [min. - max.] ? | 1220-1260 | mT |
| coercivity bHc ? | 10.8-11.5 | kOe |
| coercivity bHc ? | 860-915 | kA/m |
| actual internal force iHc | ≥ 12 | kOe |
| actual internal force iHc | ≥ 955 | kA/m |
| energy density [min. - max.] ? | 36-38 | BH max MGOe |
| energy density [min. - max.] ? | 287-303 | BH max KJ/m |
| max. temperature ? | ≤ 80 | °C |
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% |
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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Advantages as well as disadvantages of neodymium magnets.
Pros
- They virtually do not lose strength, because even after ten years the decline in efficiency is only ~1% (according to literature),
- They feature excellent resistance to weakening of magnetic properties when exposed to opposing magnetic fields,
- A magnet with a smooth gold surface looks better,
- The surface of neodymium magnets generates a powerful magnetic field – this is a key feature,
- 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 freedom in designing and the ability to customize to individual projects,
- Wide application in modern industrial fields – they find application in magnetic memories, drive modules, medical devices, and industrial machines.
- Thanks to concentrated force, small magnets offer high operating force, with minimal size,
Weaknesses
- They are fragile upon heavy impacts. To avoid cracks, it is worth securing magnets in special housings. Such protection not only shields the magnet but also improves its resistance to damage
- 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.
- Magnets exposed to a humid environment can rust. Therefore when using outdoors, we advise using water-impermeable magnets made of rubber, plastic or other material protecting against moisture
- Limited ability of creating threads in the magnet and complicated forms - preferred is a housing - mounting mechanism.
- Potential hazard resulting from small fragments of magnets can be dangerous, when accidentally swallowed, which is particularly important in the aspect of protecting the youngest. Furthermore, small components of these devices can be problematic in diagnostics medical when they are in the body.
- With mass production the cost of neodymium magnets can be a barrier,
Holding force characteristics
Maximum lifting capacity of the magnet – what it depends on?
- with the application of a sheet made of low-carbon steel, guaranteeing maximum field concentration
- whose transverse dimension equals approx. 10 mm
- with an ground contact surface
- without the slightest clearance between the magnet and steel
- under vertical application of breakaway force (90-degree angle)
- at ambient temperature room level
Determinants of practical lifting force of a magnet
- Clearance – the presence of any layer (paint, tape, gap) acts as an insulator, which reduces capacity steeply (even by 50% at 0.5 mm).
- Loading method – declared lifting capacity refers to pulling vertically. When slipping, the magnet exhibits much less (often approx. 20-30% of maximum force).
- Element thickness – for full efficiency, the steel must be sufficiently thick. Paper-thin metal restricts the attraction force (the magnet "punches through" it).
- Steel grade – ideal substrate is high-permeability steel. Hardened steels may generate lower lifting capacity.
- Surface condition – ground elements guarantee perfect abutment, which improves field saturation. Rough surfaces weaken the grip.
- Thermal environment – temperature increase results in weakening of force. It is worth remembering the maximum operating temperature for a given model.
Lifting capacity testing was carried out on plates with a smooth surface of optimal thickness, under perpendicular forces, in contrast under parallel forces the load capacity is reduced by as much as 5 times. Moreover, even a minimal clearance between the magnet’s surface and the plate lowers the lifting capacity.
Precautions when working with NdFeB magnets
Implant safety
Health Alert: Strong magnets can deactivate pacemakers and defibrillators. Do not approach if you have medical devices.
Fire risk
Powder generated during grinding of magnets is self-igniting. Do not drill into magnets unless you are an expert.
Danger to the youngest
Absolutely store magnets away from children. Risk of swallowing is significant, and the effects of magnets connecting inside the body are fatal.
Keep away from computers
Avoid bringing magnets close to a purse, laptop, or TV. The magnetism can permanently damage these devices and erase data from cards.
Metal Allergy
Studies show that the nickel plating (the usual finish) is a strong allergen. If your skin reacts to metals, refrain from touching magnets with bare hands or choose coated magnets.
Permanent damage
Monitor thermal conditions. Heating the magnet above 80 degrees Celsius will ruin its magnetic structure and strength.
Immense force
Before use, read the rules. Uncontrolled attraction can destroy the magnet or hurt your hand. Think ahead.
Impact on smartphones
A powerful magnetic field disrupts the operation of compasses in phones and GPS navigation. Do not bring magnets near a smartphone to prevent breaking the sensors.
Magnets are brittle
Despite metallic appearance, the material is delicate and not impact-resistant. Avoid impacts, as the magnet may crumble into hazardous fragments.
Finger safety
Big blocks can break fingers in a fraction of a second. Never put your hand between two strong 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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