NC NeoCube fi 5 mm kuleczki kolorowe / N38 - neocube

Pros as well as cons of neodymium magnets.

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

• They do not lose power, even during nearly ten years – the decrease in lifting capacity is only ~1% (theoretically),
• They do not lose their magnetic properties even under strong external field,
• By using a shiny layer of gold, the element presents an professional look,
• They are known for high magnetic induction at the operating surface, which affects their effectiveness,
• They are suitable for high-temperature applications, operating effectively at 230°C+ due to advanced heat resistance and form-specific properties,
• In view of the ability of precise shaping and customization to custom requirements, magnetic components can be manufactured in a wide range of forms and dimensions, which makes them more universal,
• Key role in innovative solutions – they find application in data components, electric drive systems, precision medical tools, and industrial machines.
• Thanks to concentrated force, small magnets offer high operating force, in miniature format,

Disadvantages of neodymium magnets:

• Brittleness is one of their disadvantages. Upon strong impact they can break. We recommend keeping them in a special holder, which not only protects them against impacts but also increases their durability
• We warn that neodymium magnets can reduce their strength at high temperatures. To prevent this, we suggest our specialized [AH] magnets, which work effectively even at 230°C.
• When exposed to humidity, magnets start to rust. To use them in conditions outside, it is recommended to use protective magnets, such as those in rubber or plastics, which secure oxidation as well as corrosion.
• Limited possibility of producing threads in the magnet and complex forms - recommended is cover - magnetic holder.
• Health risk resulting from small fragments of magnets pose a threat, in case of ingestion, which becomes key in the aspect of protecting the youngest. Furthermore, small elements of these magnets are able to complicate diagnosis medical when they are in the body.
• High unit price – neodymium magnets cost more than other types of magnets (e.g. ferrite), which increases costs of application in large quantities

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

Information about lifting capacity is the result of a measurement for ideal contact conditions, including:

• using a sheet made of high-permeability steel, acting as a ideal flux conductor
• with a thickness minimum 10 mm
• characterized by smoothness
• with total lack of distance (no impurities)
• under perpendicular force direction (90-degree angle)
• in temp. approx. 20°C

Lifting capacity in real conditions – factors

During everyday use, the real power results from a number of factors, ranked from the most important:

• Space between surfaces – even a fraction of a millimeter of distance (caused e.g. by varnish or dirt) drastically reduces the magnet efficiency, often by half at just 0.5 mm.
• Force direction – declared lifting capacity refers to detachment vertically. When slipping, the magnet holds much less (often approx. 20-30% of nominal force).
• Metal thickness – thin material does not allow full use of the magnet. Part of the magnetic field passes through the material instead of generating force.
• Metal type – different alloys attracts identically. Alloy additives worsen the interaction with the magnet.
• Smoothness – ideal contact is possible only on polished steel. Rough texture create air cushions, reducing force.
• Operating temperature – NdFeB sinters have a sensitivity to temperature. When it is hot they lose power, and at low temperatures they can be stronger (up to a certain limit).

* Lifting capacity was measured by applying a steel plate with a smooth surface of suitable thickness (min. 20 mm), under vertically applied force, whereas under shearing force the load capacity is reduced by as much as fivefold. Additionally, even a slight gap {between} the magnet and the plate lowers the holding force.