NC NeoCube fi 5 mm kuleczki kolorowe / N38 - neocube

Pros as well as cons of NdFeB magnets.

Besides their immense field intensity, neodymium magnets offer the following advantages:

• They retain attractive force for almost ten years – the loss is just ~1% (according to analyses),
• Neodymium magnets prove to be exceptionally resistant to magnetic field loss caused by external interference,
• By covering with a smooth coating of nickel, the element presents an modern look,
• Magnets have huge magnetic induction on the working surface,
• Made from properly selected components, these magnets show impressive resistance to high heat, enabling them to function (depending on their shape) at temperatures up to 230°C and above...
• In view of the ability of precise molding and adaptation to specialized solutions, magnetic components can be manufactured in a broad palette of shapes and sizes, which amplifies use scope,
• Key role in innovative solutions – they are used in hard drives, electric drive systems, medical devices, and multitasking production systems.
• Compactness – despite small sizes they generate large force, making them ideal for precision applications

Characteristics of disadvantages of neodymium magnets: application proposals

• Brittleness is one of their disadvantages. Upon intense impact they can fracture. We recommend keeping them in a special holder, which not only protects them against impacts but also raises their durability
• When exposed to high temperature, neodymium magnets experience a drop in force. Often, when the temperature exceeds 80°C, their power decreases (depending on the size, as well as shape of the magnet). For those who need magnets for extreme conditions, we offer [AH] versions withstanding up to 230°C
• Due to the susceptibility of magnets to corrosion in a humid environment, we suggest using waterproof magnets made of rubber, plastic or other material stable to moisture, when using outdoors
• We suggest a housing - magnetic holder, due to difficulties in realizing nuts inside the magnet and complex shapes.
• Potential hazard resulting from small fragments of magnets are risky, in case of ingestion, which is particularly important in the context of child health protection. Additionally, small elements of these devices can complicate diagnosis medical after entering the body.
• With large orders the cost of neodymium magnets is a challenge,

Best holding force of the magnet in ideal parameters – what it depends on?

The specified lifting capacity concerns the maximum value, measured under ideal test conditions, meaning:

• using a base made of low-carbon steel, functioning as a ideal flux conductor
• whose thickness equals approx. 10 mm
• characterized by lack of roughness
• with total lack of distance (no coatings)
• during detachment in a direction perpendicular to the mounting surface
• in temp. approx. 20°C

Lifting capacity in real conditions – factors

Bear in mind that the application force may be lower depending on the following factors, starting with the most relevant:

• Space between magnet and steel – even a fraction of a millimeter of distance (caused e.g. by veneer or unevenness) significantly weakens the magnet efficiency, often by half at just 0.5 mm.
• Load vector – highest force is obtained only during pulling at a 90° angle. The shear force of the magnet along the surface is usually several times lower (approx. 1/5 of the lifting capacity).
• Metal thickness – thin material does not allow full use of the magnet. Part of the magnetic field penetrates through instead of generating force.
• Chemical composition of the base – low-carbon steel attracts best. Higher carbon content reduce magnetic permeability and lifting capacity.
• Base smoothness – the more even the surface, the better the adhesion and stronger the hold. Roughness creates an air distance.
• Operating temperature – neodymium magnets have a sensitivity to temperature. When it is hot they are weaker, and in frost gain strength (up to a certain limit).

* Lifting capacity testing was carried out on plates with a smooth surface of optimal thickness, under perpendicular forces, in contrast under shearing force the holding force is lower. In addition, even a small distance {between} the magnet’s surface and the plate decreases the load capacity.