WM 34.5x24.3x17 / N38 - magnetic hanger

Advantages and disadvantages of neodymium magnets.

In addition to their long-term stability, neodymium magnets provide the following advantages:

• They do not lose magnetism, even over around ten years – the drop in strength is only ~1% (theoretically),
• Neodymium magnets are highly resistant to demagnetization caused by magnetic disturbances,
• Thanks to the elegant finish, the plating of Ni-Cu-Ni, gold, or silver-plated gives an professional appearance,
• Magnetic induction on the working part of the magnet remains maximum,
• Made from properly selected components, these magnets show impressive resistance to high heat, enabling them to function (depending on their form) at temperatures up to 230°C and above...
• Thanks to the possibility of free forming and adaptation to custom requirements, NdFeB magnets can be produced in a variety of shapes and sizes, which amplifies use scope,
• Key role in high-tech industry – they are used in magnetic memories, electric motors, precision medical tools, also other advanced devices.
• Thanks to efficiency per cm³, small magnets offer high operating force, in miniature format,

Disadvantages of NdFeB magnets:

• To avoid cracks upon strong impacts, we recommend using special steel housings. Such a solution protects the magnet and simultaneously increases its durability.
• Neodymium magnets lose their power under the influence of heating. As soon as 80°C is exceeded, many of them start losing their force. 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 recommend using waterproof magnets made of rubber, plastic or other material resistant to moisture
• We recommend a housing - magnetic mount, due to difficulties in realizing nuts inside the magnet and complicated forms.
• Health risk resulting from small fragments of magnets can be dangerous, in case of ingestion, which is particularly important in the aspect of protecting the youngest. Furthermore, small elements of these products can complicate diagnosis medical when they are in the body.
• Due to complex production process, their price is higher than average,

Maximum magnetic pulling force – what it depends on?

The force parameter is a measurement result executed under specific, ideal conditions:

• on a plate made of structural steel, optimally conducting the magnetic flux
• with a cross-section of at least 10 mm
• with an ground touching surface
• with zero gap (no impurities)
• under perpendicular force direction (90-degree angle)
• at conditions approx. 20°C

What influences lifting capacity in practice

Real force impacted by working environment parameters, such as (from priority):

• Distance – the presence of any layer (rust, dirt, air) acts as an insulator, which lowers power rapidly (even by 50% at 0.5 mm).
• Force direction – declared lifting capacity refers to detachment vertically. When slipping, the magnet holds significantly lower power (often approx. 20-30% of maximum force).
• Plate thickness – too thin steel does not close the flux, causing part of the flux to be escaped into the air.
• Metal type – different alloys reacts the same. Alloy additives worsen the interaction with the magnet.
• Smoothness – full contact is possible only on polished steel. Rough texture create air cushions, weakening the magnet.
• Temperature – temperature increase results in weakening of force. It is worth remembering the thermal limit for a given model.

* Lifting capacity testing was carried out on a smooth plate of optimal thickness, under perpendicular forces, whereas under parallel forces the lifting capacity is smaller. Additionally, even a minimal clearance {between} the magnet’s surface and the plate reduces the load capacity.