NC NeoCube fi 5 mm kuleczki srebrne / N38 - neocube

Advantages as well as disadvantages of NdFeB magnets.

Besides their stability, neodymium magnets are valued for these benefits:

• Their power is durable, and after around ten years it decreases only by ~1% (according to research),
• They feature excellent resistance to weakening of magnetic properties when exposed to external magnetic sources,
• In other words, due to the glossy surface of gold, the element is aesthetically pleasing,
• They feature high magnetic induction at the operating surface, which affects their effectiveness,
• Through (appropriate) combination of ingredients, they can achieve high thermal strength, enabling action at temperatures reaching 230°C and above...
• Due to the possibility of flexible forming and adaptation to individualized needs, neodymium magnets can be modeled in a wide range of geometric configurations, which increases their versatility,
• Significant place in electronics industry – they serve a role in computer drives, brushless drives, precision medical tools, and other advanced devices.
• Compactness – despite small sizes they generate large force, making them ideal for precision applications

Cons of neodymium magnets and proposals for their use:

• To avoid cracks upon strong impacts, we recommend using special steel holders. Such a solution secures the magnet and simultaneously improves its durability.
• Neodymium magnets lose power when exposed to high temperatures. After reaching 80°C, many of them experience permanent drop of strength (a factor is the shape and dimensions of the magnet). We offer magnets specially adapted to work at temperatures up to 230°C marked [AH], which are extremely resistant to heat
• Magnets exposed to a humid environment can corrode. Therefore when using outdoors, we recommend using water-impermeable magnets made of rubber, plastic or other material resistant to moisture
• Limited possibility of producing nuts in the magnet and complex shapes - preferred is cover - magnet mounting.
• Health risk related to microscopic parts of magnets can be dangerous, when accidentally swallowed, which is particularly important in the context of child safety. It is also worth noting that tiny parts of these products can be problematic in diagnostics medical when they are in the body.
• High unit price – neodymium magnets cost more than other types of magnets (e.g. ferrite), which hinders application in large quantities

Detachment force of the magnet in optimal conditions – what it depends on?

The load parameter shown refers to the maximum value, measured under optimal environment, namely:

• on a block made of mild steel, optimally conducting the magnetic flux
• possessing a thickness of min. 10 mm to avoid saturation
• with a plane cleaned and smooth
• under conditions of ideal adhesion (surface-to-surface)
• during pulling in a direction vertical to the plane
• in temp. approx. 20°C

What influences lifting capacity in practice

Effective lifting capacity is influenced by specific conditions, such as (from priority):

• Clearance – existence of any layer (rust, tape, air) acts as an insulator, which lowers capacity steeply (even by 50% at 0.5 mm).
• Direction of force – highest force is obtained only during perpendicular pulling. The force required to slide of the magnet along the surface is usually several times lower (approx. 1/5 of the lifting capacity).
• Substrate thickness – for full efficiency, the steel must be adequately massive. Paper-thin metal restricts the lifting capacity (the magnet "punches through" it).
• Steel grade – ideal substrate is high-permeability steel. Stainless steels may generate lower lifting capacity.
• Surface finish – full contact is obtained only on smooth steel. Any scratches and bumps reduce the real contact area, weakening the magnet.
• Thermal environment – temperature increase causes a temporary drop of force. Check the thermal limit for a given model.

* Lifting capacity testing was performed on plates with a smooth surface of suitable thickness, under perpendicular forces, in contrast under shearing force the lifting capacity is smaller. Additionally, even a minimal clearance {between} the magnet and the plate decreases the holding force.