NC NeoCube fi 5 mm kuleczki kolorowe / N38 - neocube

Pros as well as cons of NdFeB magnets.

Apart from their superior power, neodymium magnets have these key benefits:

• Their strength is durable, and after around 10 years it drops only by ~1% (according to research),
• They retain their magnetic properties even under close interference source,
• By using a lustrous coating of silver, the element has an proper look,
• The surface of neodymium magnets generates a concentrated magnetic field – this is a key feature,
• Thanks to resistance to high temperature, they can operate (depending on the shape) even at temperatures up to 230°C and higher...
• Due to the possibility of flexible forming and adaptation to specialized solutions, neodymium magnets can be modeled in a wide range of forms and dimensions, which makes them more universal,
• Huge importance in electronics industry – they serve a role in computer drives, motor assemblies, advanced medical instruments, and other advanced devices.
• Relatively small size with high pulling force – neodymium magnets offer strong magnetic field in compact dimensions, which enables their usage in small systems

Disadvantages of neodymium magnets:

• Susceptibility to cracking is one of their disadvantages. Upon strong impact they can fracture. We advise keeping them in a strong case, which not only protects them against impacts but also increases their durability
• When exposed to high temperature, neodymium magnets suffer a drop in strength. Often, when the temperature exceeds 80°C, their power 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
• Magnets exposed to a humid environment can rust. Therefore while using outdoors, we suggest using water-impermeable magnets made of rubber, plastic or other material resistant to moisture
• Due to limitations in creating threads and complicated forms in magnets, we recommend using casing - magnetic holder.
• Possible danger resulting from small fragments of magnets are risky, if swallowed, which is particularly important in the aspect of protecting the youngest. It is also worth noting that small components of these products are able to be problematic in diagnostics medical in case of swallowing.
• With large orders the cost of neodymium magnets is economically unviable,

Highest magnetic holding force – what affects it?

The load parameter shown represents the peak performance, recorded under laboratory conditions, namely:

• using a sheet made of low-carbon steel, serving as a magnetic yoke
• whose transverse dimension reaches at least 10 mm
• with an polished contact surface
• without the slightest air gap between the magnet and steel
• during detachment in a direction vertical to the mounting surface
• in neutral thermal conditions

Magnet lifting force in use – key factors

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

• Distance (betwixt the magnet and the plate), as even a tiny distance (e.g. 0.5 mm) results in a reduction in force by up to 50% (this also applies to paint, corrosion or debris).
• Angle of force application – highest force is reached only during perpendicular pulling. The resistance to sliding of the magnet along the plate is typically several times lower (approx. 1/5 of the lifting capacity).
• Steel thickness – insufficiently thick plate does not accept the full field, causing part of the flux to be escaped to the other side.
• Material type – ideal substrate is pure iron steel. Hardened steels may generate lower lifting capacity.
• Surface quality – the more even the surface, the larger the contact zone and higher the lifting capacity. Unevenness acts like micro-gaps.
• Thermal conditions – neodymium magnets have a negative temperature coefficient. At higher temperatures they lose power, and at low temperatures gain strength (up to a certain limit).

* Lifting capacity testing was carried out on plates with a smooth surface of suitable thickness, under perpendicular forces, in contrast under shearing force the load capacity is reduced by as much as fivefold. In addition, even a minimal clearance {between} the magnet’s surface and the plate decreases the holding force.