NC NeoCube fi 5 mm kuleczki kolorowe / N38 - neocube

Strengths as well as weaknesses of neodymium magnets.

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

• They virtually do not lose strength, because even after ten years the decline in efficiency is only ~1% (based on calculations),
• Neodymium magnets are exceptionally resistant to magnetic field loss caused by external field sources,
• By covering with a decorative layer of nickel, the element acquires an professional look,
• They show high magnetic induction at the operating surface, which improves attraction properties,
• Thanks to resistance to high temperature, they are capable of working (depending on the form) even at temperatures up to 230°C and higher...
• Thanks to the option of accurate molding and customization to custom requirements, magnetic components can be manufactured in a wide range of shapes and sizes, which increases their versatility,
• Universal use in innovative solutions – they are utilized in mass storage devices, motor assemblies, advanced medical instruments, as well as modern systems.
• Compactness – despite small sizes they generate large force, making them ideal for precision applications

Characteristics of disadvantages of neodymium magnets and proposals for their use:

• Susceptibility to cracking is one of their disadvantages. Upon strong impact they can fracture. We advise keeping them in a special holder, which not only secures them against impacts but also raises their durability
• When exposed to high temperature, neodymium magnets suffer a drop in power. 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
• 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
• Due to limitations in realizing threads and complicated forms in magnets, we recommend using cover - magnetic holder.
• Potential hazard related to microscopic parts of magnets are risky, in case of ingestion, which gains importance in the context of child safety. Additionally, small elements of these magnets are able to disrupt the diagnostic process medical after entering the body.
• Higher cost of purchase is a significant factor to consider compared to ceramic magnets, especially in budget applications

Maximum lifting force for a neodymium magnet – what contributes to it?

The declared magnet strength represents the peak performance, recorded under optimal environment, specifically:

• using a base made of high-permeability steel, serving as a magnetic yoke
• whose thickness reaches at least 10 mm
• with a surface perfectly flat
• without the slightest insulating layer between the magnet and steel
• under perpendicular application of breakaway force (90-degree angle)
• at ambient temperature room level

Practical aspects of lifting capacity – factors

Bear in mind that the magnet holding will differ influenced by elements below, in order of importance:

• Space between magnet and steel – every millimeter of separation (caused e.g. by varnish or unevenness) drastically reduces 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 resistance to sliding of the magnet along the surface is typically several times smaller (approx. 1/5 of the lifting capacity).
• Element thickness – for full efficiency, the steel must be sufficiently thick. Paper-thin metal restricts the lifting capacity (the magnet "punches through" it).
• Chemical composition of the base – low-carbon steel attracts best. Alloy admixtures reduce magnetic permeability and lifting capacity.
• Surface condition – smooth surfaces ensure maximum contact, which increases force. Rough surfaces reduce efficiency.
• Thermal conditions – neodymium magnets have a negative temperature coefficient. At higher temperatures they are weaker, and in frost they can be stronger (up to a certain limit).

* Lifting capacity testing was conducted on plates with a smooth surface of suitable thickness, under a perpendicular pulling force, in contrast under attempts to slide the magnet the load capacity is reduced by as much as fivefold. Moreover, even a minimal clearance {between} the magnet’s surface and the plate lowers the lifting capacity.