NC NeoCube fi 5 mm kuleczki kolorowe / N38 - neocube

Strengths and weaknesses of neodymium magnets.

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

• They have constant strength, and over more than 10 years their attraction force decreases symbolically – ~1% (according to theory),
• They are noted for resistance to demagnetization induced by external disturbances,
• Thanks to the shimmering finish, the layer of Ni-Cu-Ni, gold-plated, or silver gives an aesthetic appearance,
• They feature high magnetic induction at the operating surface, which improves attraction properties,
• Through (adequate) combination of ingredients, they can achieve high thermal strength, enabling action at temperatures reaching 230°C and above...
• Possibility of exact forming as well as adapting to atypical requirements,
• Key role in future technologies – they are used in computer drives, motor assemblies, medical equipment, also modern systems.
• Thanks to their power density, small magnets offer high operating force, occupying minimum space,

Disadvantages of neodymium magnets:

• To avoid cracks under impact, we recommend using special steel holders. Such a solution protects the magnet and simultaneously increases its 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 durability 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 resistant to moisture, when using outdoors
• Due to limitations in creating threads and complex shapes in magnets, we recommend using casing - magnetic holder.
• Possible danger resulting from small fragments of magnets pose a threat, if swallowed, which becomes key in the context of child safety. It is also worth noting that small elements of these devices are able to disrupt the diagnostic process medical after entering the body.
• Due to expensive raw materials, their price exceeds standard values,

Maximum magnetic pulling force – what contributes to it?

The declared magnet strength represents the peak performance, measured under laboratory conditions, meaning:

• using a plate made of mild steel, functioning as a ideal flux conductor
• whose transverse dimension equals approx. 10 mm
• characterized by even structure
• under conditions of gap-free contact (surface-to-surface)
• for force acting at a right angle (in the magnet axis)
• at ambient temperature room level

What influences lifting capacity in practice

In real-world applications, the real power depends on a number of factors, presented from most significant:

• Distance (betwixt the magnet and the metal), because even a tiny clearance (e.g. 0.5 mm) can cause a decrease in force by up to 50% (this also applies to paint, rust or debris).
• Loading method – declared lifting capacity refers to pulling vertically. When attempting to slide, the magnet holds much less (typically approx. 20-30% of maximum force).
• Substrate thickness – to utilize 100% power, the steel must be sufficiently thick. Paper-thin metal limits the attraction force (the magnet "punches through" it).
• Steel grade – ideal substrate is pure iron steel. Stainless steels may generate lower lifting capacity.
• Surface structure – the more even the plate, the better the adhesion and stronger the hold. Unevenness acts like micro-gaps.
• Temperature – temperature increase results in weakening of induction. Check the maximum operating temperature for a given model.

* Lifting capacity was determined using a polished steel plate of optimal thickness (min. 20 mm), under perpendicular pulling force, in contrast under parallel forces the lifting capacity is smaller. In addition, even a slight gap {between} the magnet’s surface and the plate decreases the holding force.