NC NeoCube fi 5 mm kuleczki kolorowe / N38 - neocube
neocube
Catalog no 120229
GTIN: 5906301812685
Weight
145 g
Magnetization Direction
↑ axial
Coating
[NiCuNi] nickel
49.99 ZŁ with VAT / pcs + price for transport
40.64 ZŁ net + 23% VAT / pcs
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Magnetic properties of material N38
Physical properties of sintered neodymium magnets Nd2Fe14B at 20°C
Shopping tips
Strengths as well as weaknesses of rare earth magnets.
In addition to their long-term stability, neodymium magnets provide the following advantages:
- They have unchanged lifting capacity, and over more than 10 years their attraction force decreases symbolically – ~1% (in testing),
- They are resistant to demagnetization induced by presence of other magnetic fields,
- The use of an elegant coating of noble metals (nickel, gold, silver) causes the element to have aesthetics,
- Magnetic induction on the working layer of the magnet remains very high,
- Due to their durability and thermal resistance, neodymium magnets are capable of operate (depending on the shape) even at high temperatures reaching 230°C or more...
- Thanks to flexibility in constructing and the ability to customize to complex applications,
- Key role in future technologies – they find application in computer drives, motor assemblies, diagnostic systems, also multitasking production systems.
- Compactness – despite small sizes they generate large force, making them ideal for precision applications
What to avoid - cons of neodymium magnets: tips and applications.
- Susceptibility to cracking is one of their disadvantages. Upon intense impact they can fracture. We advise keeping them in a strong case, which not only protects them against impacts but also increases their durability
- Neodymium magnets decrease their power under the influence of heating. As soon as 80°C is exceeded, many of them start losing their power. 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 advise using waterproof magnets e.g. in rubber, plastic
- Due to limitations in creating threads and complex shapes in magnets, we recommend using casing - magnetic holder.
- Health risk to health – tiny shards of magnets are risky, if swallowed, which gains importance in the context of child health protection. Furthermore, tiny parts of these devices are able to be problematic in diagnostics medical when they are in the body.
- With large orders the cost of neodymium magnets is economically unviable,
Maximum magnetic pulling force – what contributes to it?
Holding force of 0 kg is a theoretical maximum value performed under standard conditions:
- on a base made of structural steel, perfectly concentrating the magnetic flux
- whose transverse dimension equals approx. 10 mm
- with an polished touching surface
- without the slightest clearance between the magnet and steel
- during pulling in a direction perpendicular to the mounting surface
- in stable room temperature
Impact of factors on magnetic holding capacity in practice
Real force impacted by working environment parameters, including (from most important):
- Gap (betwixt the magnet and the plate), as 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).
- Pull-off angle – remember that the magnet holds strongest perpendicularly. Under shear forces, the capacity drops significantly, often to levels of 20-30% of the maximum value.
- Wall thickness – the thinner the sheet, the weaker the hold. Magnetic flux passes through the material instead of converting into lifting capacity.
- Material type – ideal substrate is pure iron steel. Stainless steels may generate lower lifting capacity.
- Surface structure – the more even the plate, the larger the contact zone and higher the lifting capacity. Roughness creates an air distance.
- Temperature – heating the magnet results in weakening of induction. Check the maximum operating temperature for a given model.
* Lifting capacity testing was carried out on a smooth plate of optimal thickness, under a perpendicular pulling force, whereas under shearing force the load capacity is reduced by as much as 75%. In addition, even a minimal clearance {between} the magnet and the plate lowers the holding force.
Warnings
Keep away from children
Adult use only. Tiny parts pose a choking risk, causing severe trauma. Keep out of reach of kids and pets.
Physical harm
Protect your hands. Two powerful magnets will snap together immediately with a force of massive weight, crushing anything in their path. Be careful!
Implant safety
Health Alert: Strong magnets can deactivate heart devices and defibrillators. Stay away if you have medical devices.
Do not underestimate power
Before use, check safety instructions. Sudden snapping can break the magnet or hurt your hand. Think ahead.
Fragile material
Protect your eyes. Magnets can fracture upon violent connection, launching shards into the air. Eye protection is mandatory.
Heat warning
Control the heat. Exposing the magnet above 80 degrees Celsius will destroy its magnetic structure and strength.
Magnetic interference
GPS units and mobile phones are extremely susceptible to magnetism. Direct contact with a strong magnet can ruin the sensors in your phone.
Fire warning
Fire warning: Rare earth powder is highly flammable. Avoid machining magnets without safety gear as this may cause fire.
Allergy Warning
Studies show that nickel (the usual finish) is a common allergen. If your skin reacts to metals, prevent direct skin contact or select versions in plastic housing.
Protect data
Device Safety: Neodymium magnets can damage payment cards and delicate electronics (pacemakers, hearing aids, mechanical watches).
Security!
More info about risks in the article: Safety of working with magnets.
