NC NeoCube fi 5 mm kuleczki srebrne / N38 - neocube

Strengths as well as weaknesses of neodymium magnets.

Apart from their consistent magnetic energy, neodymium magnets have these key benefits:

• They virtually do not lose strength, because even after 10 years the performance loss is only ~1% (in laboratory conditions),
• They do not lose their magnetic properties even under strong external field,
• A magnet with a smooth silver surface has an effective appearance,
• They are known for high magnetic induction at the operating surface, which increases their power,
• Neodymium magnets are characterized by extremely high magnetic induction on the magnet surface and are able to act (depending on the form) even at a temperature of 230°C or more...
• Thanks to modularity in shaping and the capacity to adapt to client solutions,
• Universal use in modern industrial fields – they are used in hard drives, brushless drives, medical equipment, and modern systems.
• Thanks to their power density, small magnets offer high operating force, with minimal size,

Disadvantages of neodymium magnets:

• At strong impacts they can break, therefore we recommend placing them in special holders. A metal housing provides additional protection against damage, as well as increases the magnet's durability.
• Neodymium magnets decrease 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 stability even at temperatures up to 230°C
• Due to the susceptibility of magnets to corrosion in a humid environment, we recommend using waterproof magnets made of rubber, plastic or other material immune to moisture, in case of application outdoors
• Limited ability of producing nuts in the magnet and complicated forms - recommended is cover - magnetic holder.
• Possible danger related to microscopic parts of magnets are risky, in case of ingestion, which is particularly important in the context of child health protection. Furthermore, small components of these devices are able to be problematic in diagnostics medical when they are in the body.
• Higher cost of purchase is one of the disadvantages compared to ceramic magnets, especially in budget applications

Breakaway strength of the magnet in ideal conditions – what it depends on?

Information about lifting capacity was defined for ideal contact conditions, assuming:

• with the contact of a sheet made of low-carbon steel, ensuring maximum field concentration
• whose thickness equals approx. 10 mm
• with a surface perfectly flat
• with direct contact (without impurities)
• for force applied at a right angle (pull-off, not shear)
• at room temperature

Impact of factors on magnetic holding capacity in practice

Real force is influenced by working environment parameters, including (from priority):

• Distance – the presence of foreign body (paint, dirt, gap) interrupts the magnetic circuit, which reduces power rapidly (even by 50% at 0.5 mm).
• Angle of force application – maximum parameter is available only during perpendicular pulling. The force required to slide of the magnet along the plate is typically several times lower (approx. 1/5 of the lifting capacity).
• Steel thickness – too thin plate does not close the flux, causing part of the power to be lost to the other side.
• Metal type – different alloys reacts the same. High carbon content weaken the attraction effect.
• Surface condition – ground elements guarantee perfect abutment, which improves force. Uneven metal weaken the grip.
• Thermal environment – temperature increase results in weakening of induction. It is worth remembering the thermal limit for a given model.

* Lifting capacity testing was performed on plates with a smooth surface of suitable thickness, under a perpendicular pulling force, whereas under attempts to slide the magnet the load capacity is reduced by as much as 75%. Moreover, even a small distance {between} the magnet’s surface and the plate lowers the load capacity.