NC NeoCube fi 5 mm kuleczki srebrne / N38 - neocube

Advantages as well as disadvantages of neodymium magnets.

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

• They retain full power for around 10 years – the loss is just ~1% (based on simulations),
• They feature excellent resistance to magnetism drop when exposed to opposing magnetic fields,
• By using a reflective coating of silver, the element gains an nice look,
• Magnets have extremely high magnetic induction on the outer layer,
• These magnets tolerate elevated temperatures, often exceeding 230°C, when properly designed (in relation to build),
• Possibility of individual shaping as well as optimizing to concrete needs,
• Universal use in high-tech industry – they find application in data components, electromotive mechanisms, precision medical tools, also modern systems.
• Compactness – despite small sizes they generate large force, making them ideal for precision applications

Disadvantages of NdFeB magnets:

• At strong impacts they can crack, therefore we advise placing them in special holders. A metal housing provides additional protection against damage and increases the magnet's durability.
• When exposed to high temperature, neodymium magnets suffer a drop in power. Often, when the temperature exceeds 80°C, their strength decreases (depending on the size and shape of the magnet). For those who need magnets for extreme conditions, we offer [AH] versions withstanding up to 230°C
• When exposed to humidity, magnets start to rust. For applications outside, it is recommended to use protective magnets, such as magnets in rubber or plastics, which secure oxidation and corrosion.
• Limited ability of creating nuts in the magnet and complicated forms - recommended is casing - magnetic holder.
• Potential hazard related to microscopic parts of magnets pose a threat, in case of ingestion, which gains importance in the context of child health protection. It is also worth noting that small elements of these products are able to disrupt the diagnostic process medical when they are in the body.
• Higher cost of purchase is a significant factor to consider compared to ceramic magnets, especially in budget applications

Maximum lifting capacity of the magnet – what affects it?

The lifting capacity listed is a measurement result performed under standard conditions:

• using a plate made of low-carbon steel, acting as a magnetic yoke
• with a thickness minimum 10 mm
• characterized by lack of roughness
• with direct contact (no impurities)
• during detachment in a direction vertical to the mounting surface
• at conditions approx. 20°C

Key elements affecting lifting force

Effective lifting capacity impacted by specific conditions, such as (from most important):

• Gap between surfaces – even a fraction of a millimeter of separation (caused e.g. by veneer or unevenness) significantly weakens the magnet efficiency, often by half at just 0.5 mm.
• Angle of force application – highest force is reached only during pulling at a 90° angle. The force required to slide of the magnet along the plate is usually several times lower (approx. 1/5 of the lifting capacity).
• Plate thickness – insufficiently thick sheet causes magnetic saturation, causing part of the power to be lost to the other side.
• Material type – ideal substrate is high-permeability steel. Cast iron may generate lower lifting capacity.
• Base smoothness – the more even the plate, the better the adhesion and higher the lifting capacity. Unevenness acts like micro-gaps.
• Temperature influence – hot environment weakens magnetic field. Exceeding the limit temperature can permanently damage the magnet.

* Holding force was tested on the plate surface of 20 mm thickness, when a perpendicular force was applied, however under parallel forces the lifting capacity is smaller. Additionally, even a small distance {between} the magnet and the plate lowers the lifting capacity.