ZM XMAG2 105 elementów - magnetic toy
magnetic toy
Catalog no 040211
GTIN: 5906301812371
Weight
569 g
49.20 ZŁ with VAT / pcs + price for transport
40.00 ZŁ net + 23% VAT / pcs
bulk discounts:
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Force as well as appearance of a neodymium magnet can be reviewed with our
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Magnetic properties of material
Physical properties of sintered neodymium magnets Nd2Fe14B at 20°C
Shopping tips
Pros as well as cons of neodymium magnets.
Besides their high retention, neodymium magnets are valued for these benefits:
- They retain full power for almost 10 years – the drop is just ~1% (based on simulations),
- Neodymium magnets are distinguished by remarkably resistant to magnetic field loss caused by magnetic disturbances,
- By covering with a smooth coating of gold, the element has an elegant look,
- The surface of neodymium magnets generates a intense magnetic field – this is a distinguishing feature,
- Through (appropriate) combination of ingredients, they can achieve high thermal resistance, enabling functioning at temperatures reaching 230°C and above...
- Thanks to freedom in constructing and the ability to modify to specific needs,
- Wide application in modern technologies – they are used in HDD drives, electric drive systems, diagnostic systems, also other advanced devices.
- Thanks to efficiency per cm³, small magnets offer high operating force, with minimal size,
Disadvantages of NdFeB magnets:
- To avoid cracks upon strong impacts, we recommend using special steel holders. Such a solution protects the magnet and simultaneously improves its durability.
- Neodymium magnets lose their strength 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 stability even at temperatures up to 230°C
- Magnets exposed to a humid environment can rust. Therefore when using outdoors, we advise using waterproof magnets made of rubber, plastic or other material resistant to moisture
- We recommend cover - magnetic mechanism, due to difficulties in producing nuts inside the magnet and complicated forms.
- Potential hazard resulting from small fragments of magnets can be dangerous, when accidentally swallowed, which gains importance in the context of child safety. Additionally, tiny parts of these products can disrupt the diagnostic process medical in case of swallowing.
- With large orders the cost of neodymium magnets can be a barrier,
Magnetic strength at its maximum – what affects it?
The specified lifting capacity represents the maximum value, measured under optimal environment, meaning:
- with the application of a yoke made of low-carbon steel, guaranteeing full magnetic saturation
- possessing a thickness of min. 10 mm to ensure full flux closure
- with a surface perfectly flat
- with total lack of distance (without paint)
- under axial application of breakaway force (90-degree angle)
- at standard ambient temperature
Lifting capacity in real conditions – factors
In real-world applications, the actual lifting capacity depends on several key aspects, presented from most significant:
- Gap (betwixt the magnet and the plate), since even a microscopic distance (e.g. 0.5 mm) can cause a reduction in lifting capacity by up to 50% (this also applies to varnish, rust or debris).
- Pull-off angle – note that the magnet has greatest strength perpendicularly. Under shear forces, the holding force drops significantly, often to levels of 20-30% of the maximum value.
- Wall thickness – thin material does not allow full use of the magnet. Part of the magnetic field penetrates through instead of generating force.
- Material type – the best choice is high-permeability steel. Hardened steels may attract less.
- Surface quality – the smoother and more polished the plate, the better the adhesion and higher the lifting capacity. Unevenness creates an air distance.
- Heat – NdFeB sinters have a negative temperature coefficient. At higher temperatures they lose power, and at low temperatures gain strength (up to a certain limit).
* Lifting capacity was determined using a polished steel plate of suitable thickness (min. 20 mm), under perpendicular detachment force, however under attempts to slide the magnet the lifting capacity is smaller. Additionally, even a minimal clearance {between} the magnet and the plate reduces the lifting capacity.
Warnings
Beware of splinters
Watch out for shards. Magnets can explode upon uncontrolled impact, ejecting shards into the air. We recommend safety glasses.
Skin irritation risks
Studies show that the nickel plating (standard magnet coating) is a potent allergen. For allergy sufferers, refrain from touching magnets with bare hands or choose encased magnets.
Product not for children
Neodymium magnets are not toys. Swallowing multiple magnets may result in them connecting inside the digestive tract, which constitutes a critical condition and necessitates urgent medical intervention.
Crushing force
Watch your fingers. Two powerful magnets will join instantly with a force of several hundred kilograms, crushing everything in their path. Exercise extreme caution!
Flammability
Powder created during cutting of magnets is flammable. Avoid drilling into magnets without proper cooling and knowledge.
Phone sensors
GPS units and smartphones are highly sensitive to magnetic fields. Direct contact with a strong magnet can ruin the sensors in your phone.
Electronic devices
Equipment safety: Strong magnets can ruin payment cards and sensitive devices (heart implants, medical aids, mechanical watches).
Heat warning
Avoid heat. Neodymium magnets are sensitive to heat. If you require resistance above 80°C, ask us about HT versions (H, SH, UH).
Caution required
Before starting, check safety instructions. Uncontrolled attraction can break the magnet or hurt your hand. Think ahead.
Medical interference
Warning for patients: Strong magnetic fields disrupt medical devices. Keep at least 30 cm distance or ask another person to handle the magnets.
Important!
Details about risks in the article: Safety of working with magnets.
