AM ucho [M12] - magnetic accessories
magnetic accessories
Catalog no 080347
GTIN: 5906301812500
Weight
101.5 g
Load capacity
480 kg / 4707.19 N
9.84 ZŁ with VAT / pcs + price for transport
8.00 ZŁ net + 23% VAT / pcs
bulk discounts:
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Magnetic properties of material
Physical properties of sintered neodymium magnets Nd2Fe14B at 20°C
Shopping tips
Advantages as well as disadvantages of neodymium magnets.
Besides their remarkable strength, neodymium magnets offer the following advantages:
- They virtually do not lose strength, because even after ten years the decline in efficiency is only ~1% (based on calculations),
- They maintain their magnetic properties even under external field action,
- By applying a lustrous coating of nickel, the element has an elegant look,
- Magnets have maximum magnetic induction on the outer side,
- Made from properly selected components, these magnets show impressive resistance to high heat, enabling them to function (depending on their shape) at temperatures up to 230°C and above...
- Possibility of precise shaping and adjusting to complex applications,
- Fundamental importance in electronics industry – they are commonly used in hard drives, motor assemblies, diagnostic systems, and technologically advanced constructions.
- Relatively small size with high pulling force – neodymium magnets offer strong magnetic field in compact dimensions, which enables their usage in small systems
Disadvantages of NdFeB magnets:
- They are prone to damage upon heavy impacts. To avoid cracks, it is worth protecting magnets in a protective case. Such protection not only shields the magnet but also improves its resistance to damage
- Neodymium magnets decrease their force 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 oxidize in a humid environment - during use outdoors we recommend using waterproof magnets e.g. in rubber, plastic
- Due to limitations in producing threads and complicated forms in magnets, we recommend using casing - magnetic holder.
- Possible danger related to microscopic parts of magnets pose a threat, if swallowed, which becomes key in the aspect of protecting the youngest. It is also worth noting that small elements of these devices are able to disrupt the diagnostic process medical after entering the body.
- Higher cost of purchase is a significant factor to consider compared to ceramic magnets, especially in budget applications
Breakaway strength of the magnet in ideal conditions – what affects it?
Holding force of 480 kg is a theoretical maximum value conducted under standard conditions:
- on a plate made of structural steel, optimally conducting the magnetic flux
- whose thickness is min. 10 mm
- with a plane free of scratches
- with direct contact (no coatings)
- for force acting at a right angle (in the magnet axis)
- at room temperature
Key elements affecting lifting force
In real-world applications, the actual lifting capacity depends on many variables, listed from most significant:
- Gap between surfaces – even a fraction of a millimeter of separation (caused e.g. by veneer or dirt) diminishes the magnet efficiency, often by half at just 0.5 mm.
- Direction of force – highest force is available only during perpendicular pulling. The resistance to sliding of the magnet along the surface is typically many times lower (approx. 1/5 of the lifting capacity).
- Element thickness – for full efficiency, the steel must be adequately massive. Paper-thin metal limits the lifting capacity (the magnet "punches through" it).
- Material composition – different alloys attracts identically. High carbon content weaken the interaction with the magnet.
- Plate texture – ground elements guarantee perfect abutment, which improves field saturation. Uneven metal reduce efficiency.
- Temperature influence – hot environment reduces magnetic field. Exceeding the limit temperature can permanently damage the magnet.
* Holding force was tested on the plate surface of 20 mm thickness, when the force acted perpendicularly, however under attempts to slide the magnet the load capacity is reduced by as much as 75%. Additionally, even a minimal clearance {between} the magnet and the plate decreases the holding force.
Safety rules for work with NdFeB magnets
Bodily injuries
Big blocks can crush fingers in a fraction of a second. Do not put your hand between two strong magnets.
Heat sensitivity
Standard neodymium magnets (N-type) lose power when the temperature goes above 80°C. The loss of strength is permanent.
Dust explosion hazard
Dust produced during grinding of magnets is combustible. Avoid drilling into magnets unless you are an expert.
Metal Allergy
A percentage of the population have a contact allergy to nickel, which is the common plating for neodymium magnets. Extended handling might lead to dermatitis. We strongly advise wear protective gloves.
Magnets are brittle
Watch out for shards. Magnets can explode upon uncontrolled impact, ejecting sharp fragments into the air. Wear goggles.
Precision electronics
A powerful magnetic field negatively affects the functioning of compasses in smartphones and navigation systems. Do not bring magnets near a smartphone to avoid damaging the sensors.
Health Danger
Health Alert: Strong magnets can deactivate pacemakers and defibrillators. Do not approach if you have electronic implants.
Adults only
Only for adults. Tiny parts pose a choking risk, causing serious injuries. Store out of reach of kids and pets.
Electronic hazard
Equipment safety: Strong magnets can damage data carriers and delicate electronics (pacemakers, hearing aids, mechanical watches).
Caution required
Exercise caution. Neodymium magnets attract from a distance and connect with huge force, often faster than you can move away.
Security!
Looking for details? Read our article: Are neodymium magnets dangerous?
