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:
Need more?Need help making a decision?
Contact us by phone
+48 888 99 98 98
or send us a note via
request form
the contact page.
Lifting power along with form of magnetic components can be analyzed using our
magnetic mass calculator.
Orders submitted before 14:00 will be dispatched today!
Magnetic properties of material
Physical properties of sintered neodymium magnets Nd2Fe14B at 20°C
Shopping tips
Advantages as well as disadvantages of rare earth magnets.
Besides their durability, neodymium magnets are valued for these benefits:
- They have stable power, and over nearly 10 years their performance decreases symbolically – ~1% (according to theory),
- Magnets perfectly defend themselves against loss of magnetization caused by external fields,
- In other words, due to the aesthetic layer of silver, the element becomes visually attractive,
- Neodymium magnets generate maximum magnetic induction on a small area, which increases force concentration,
- Through (appropriate) combination of ingredients, they can achieve high thermal strength, allowing for functioning at temperatures approaching 230°C and above...
- Possibility of custom forming and adjusting to specific needs,
- Universal use in innovative solutions – they are commonly used in magnetic memories, motor assemblies, medical devices, and modern systems.
- Thanks to their power density, small magnets offer high operating force, occupying minimum space,
Cons of neodymium magnets: application proposals
- To avoid cracks under impact, we recommend using special steel holders. Such a solution secures the magnet and simultaneously improves its durability.
- Neodymium magnets lose 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
- Magnets exposed to a humid environment can rust. Therefore during using outdoors, we suggest using water-impermeable magnets made of rubber, plastic or other material resistant to moisture
- Limited possibility of producing nuts in the magnet and complex forms - recommended is casing - magnet mounting.
- Possible danger resulting from small fragments of magnets can be dangerous, in case of ingestion, which becomes key in the context of child safety. Additionally, small components of these magnets can disrupt the diagnostic process medical in case of swallowing.
- High unit price – neodymium magnets have a higher price than other types of magnets (e.g. ferrite), which increases costs of application in large quantities
Breakaway strength of the magnet in ideal conditions – what contributes to it?
The specified lifting capacity concerns the maximum value, measured under optimal environment, namely:
- with the contact of a sheet made of special test steel, ensuring full magnetic saturation
- possessing a massiveness of min. 10 mm to ensure full flux closure
- characterized by lack of roughness
- under conditions of no distance (surface-to-surface)
- during pulling in a direction vertical to the plane
- at ambient temperature room level
Practical aspects of lifting capacity – factors
Real force is affected by working environment parameters, such as (from priority):
- Gap between surfaces – even a fraction of a millimeter of distance (caused e.g. by veneer or unevenness) diminishes the magnet efficiency, often by half at just 0.5 mm.
- Pull-off angle – remember that the magnet holds strongest perpendicularly. Under shear forces, the holding force drops drastically, often to levels of 20-30% of the nominal value.
- Wall thickness – thin material does not allow full use of the magnet. Part of the magnetic field penetrates through instead of converting into lifting capacity.
- Steel type – mild steel gives the best results. Alloy admixtures reduce magnetic permeability and holding force.
- Surface finish – full contact is possible only on smooth steel. Rough texture reduce the real contact area, weakening the magnet.
- Temperature influence – high temperature weakens pulling force. Exceeding the limit temperature can permanently damage the magnet.
* Lifting capacity testing was carried out on plates with a smooth surface of suitable thickness, under perpendicular forces, whereas under shearing force the lifting capacity is smaller. In addition, even a slight gap {between} the magnet and the plate lowers the holding force.
Safe handling of neodymium magnets
Compass and GPS
Note: rare earth magnets generate a field that confuses sensitive sensors. Keep a safe distance from your mobile, device, and GPS.
Electronic devices
Data protection: Neodymium magnets can damage payment cards and sensitive devices (pacemakers, medical aids, timepieces).
Magnet fragility
Neodymium magnets are ceramic materials, meaning they are very brittle. Impact of two magnets leads to them cracking into small pieces.
Conscious usage
Be careful. Rare earth magnets attract from a distance and connect with huge force, often faster than you can react.
Do not drill into magnets
Fire hazard: Neodymium dust is explosive. Do not process magnets in home conditions as this risks ignition.
Bone fractures
Protect your hands. Two powerful magnets will join immediately with a force of several hundred kilograms, destroying everything in their path. Be careful!
Swallowing risk
Only for adults. Tiny parts pose a choking risk, causing serious injuries. Keep out of reach of kids and pets.
Metal Allergy
Medical facts indicate that nickel (standard magnet coating) is a strong allergen. If your skin reacts to metals, prevent direct skin contact or opt for coated magnets.
Permanent damage
Avoid heat. Neodymium magnets are sensitive to heat. If you need resistance above 80°C, inquire about HT versions (H, SH, UH).
Life threat
Patients with a pacemaker have to maintain an large gap from magnets. The magnetic field can interfere with the functioning of the life-saving device.
Security!
Learn more about risks in the article: Magnet Safety Guide.
