NC NeoCube fi 5 mm kuleczki srebrne / N38 - neocube

Advantages and disadvantages of NdFeB magnets.

In addition to their pulling strength, neodymium magnets provide the following advantages:

• They retain attractive force for around 10 years – the drop is just ~1% (based on simulations),
• They retain their magnetic properties even under close interference source,
• The use of an metallic coating of noble metals (nickel, gold, silver) causes the element to have aesthetics,
• Magnetic induction on the working part of the magnet is exceptional,
• Made from properly selected components, these magnets show impressive resistance to high heat, enabling them to function (depending on their form) at temperatures up to 230°C and above...
• In view of the possibility of free molding and adaptation to unique requirements, magnetic components can be manufactured in a broad palette of forms and dimensions, which increases their versatility,
• Significant place in electronics industry – they are utilized in data components, electromotive mechanisms, medical equipment, also multitasking production systems.
• Compactness – despite small sizes they provide effective action, making them ideal for precision applications

Drawbacks and weaknesses of neodymium magnets and ways of using them

• They are fragile upon too strong impacts. To avoid cracks, it is worth protecting magnets in special housings. Such protection not only shields the magnet but also increases its resistance to damage
• Neodymium magnets lose their force under the influence of heating. As soon as 80°C is exceeded, many of them start losing their force. Therefore, we recommend our special magnets marked [AH], which maintain durability even at temperatures up to 230°C
• They rust in a humid environment. For use outdoors we advise using waterproof magnets e.g. in rubber, plastic
• Due to limitations in realizing threads and complicated forms in magnets, we propose using a housing - magnetic mechanism.
• Possible danger resulting from small fragments of magnets pose a threat, in case of ingestion, which becomes key in the context of child health protection. Furthermore, tiny parts of these products can be problematic in diagnostics medical when they are in the body.
• Due to neodymium price, their price is relatively high,

Detachment force of the magnet in optimal conditions – what affects it?

The force parameter is a theoretical maximum value conducted under standard conditions:

• using a base made of high-permeability steel, serving as a ideal flux conductor
• whose thickness is min. 10 mm
• characterized by even structure
• under conditions of gap-free contact (metal-to-metal)
• under axial force direction (90-degree angle)
• at room temperature

Magnet lifting force in use – key factors

It is worth knowing that the application force will differ influenced by elements below, in order of importance:

• Clearance – existence of foreign body (rust, tape, gap) interrupts the magnetic circuit, which lowers power rapidly (even by 50% at 0.5 mm).
• Loading method – declared lifting capacity refers to detachment vertically. When attempting to slide, the magnet exhibits much less (often approx. 20-30% of maximum force).
• Steel thickness – too thin steel does not close the flux, causing part of the power to be escaped to the other side.
• Steel grade – the best choice is high-permeability steel. Hardened steels may generate lower lifting capacity.
• Plate texture – ground elements guarantee perfect abutment, which improves field saturation. Rough surfaces weaken the grip.
• Thermal factor – hot environment weakens magnetic field. Exceeding the limit temperature can permanently demagnetize the magnet.

* Lifting capacity was determined with the use of a steel plate with a smooth surface of suitable thickness (min. 20 mm), under vertically applied force, in contrast under parallel forces the lifting capacity is smaller. Additionally, even a slight gap {between} the magnet’s surface and the plate reduces the lifting capacity.