NC NeoCube fi 5 mm kuleczki srebrne / N38 - neocube

Pros and cons of NdFeB magnets.

In addition to their magnetic efficiency, neodymium magnets provide the following advantages:

• They retain magnetic properties for nearly ten years – the drop is just ~1% (according to analyses),
• They are noted for resistance to demagnetization induced by presence of other magnetic fields,
• A magnet with a smooth nickel surface has an effective appearance,
• Magnetic induction on the surface of the magnet remains extremely intense,
• Due to their durability and thermal resistance, neodymium magnets can operate (depending on the shape) even at high temperatures reaching 230°C or more...
• Thanks to modularity in forming and the ability to customize to unusual requirements,
• Key role in electronics industry – they are utilized in hard drives, electromotive mechanisms, medical equipment, also technologically advanced constructions.
• Relatively small size with high pulling force – neodymium magnets offer strong magnetic field in tiny dimensions, which enables their usage in compact constructions

Problematic aspects of neodymium magnets and proposals for their use:

• Susceptibility to cracking is one of their disadvantages. Upon strong impact they can break. We recommend keeping them in a steel housing, which not only protects them against impacts but also increases their durability
• We warn that neodymium magnets can lose their strength at high temperatures. To prevent this, we advise our specialized [AH] magnets, which work effectively even at 230°C.
• Due to the susceptibility of magnets to corrosion in a humid environment, we advise using waterproof magnets made of rubber, plastic or other material immune to moisture, in case of application outdoors
• Limited possibility of making threads in the magnet and complicated forms - preferred is a housing - magnet mounting.
• Health risk resulting from small fragments of magnets are risky, when accidentally swallowed, which gains importance in the aspect of protecting the youngest. Furthermore, small components of these devices are able to be problematic in diagnostics medical after entering the body.
• Due to complex production process, their price is higher than average,

Breakaway strength of the magnet in ideal conditions – what contributes to it?

The specified lifting capacity represents the peak performance, recorded under optimal environment, namely:

• using a plate made of low-carbon steel, functioning as a ideal flux conductor
• with a cross-section no less than 10 mm
• characterized by smoothness
• without any insulating layer between the magnet and steel
• during detachment in a direction perpendicular to the plane
• at standard ambient temperature

Magnet lifting force in use – key factors

Effective lifting capacity is affected by specific conditions, mainly (from priority):

• Clearance – existence of any layer (paint, dirt, air) acts as an insulator, which reduces power steeply (even by 50% at 0.5 mm).
• Loading method – catalog parameter refers to pulling vertically. When attempting to slide, the magnet exhibits significantly lower power (often approx. 20-30% of maximum force).
• Steel thickness – insufficiently thick plate does not accept the full field, causing part of the power to be escaped to the other side.
• Plate material – low-carbon steel attracts best. Higher carbon content decrease magnetic properties and holding force.
• Surface condition – smooth surfaces ensure maximum contact, which improves force. Rough surfaces weaken the grip.
• Thermal environment – heating the magnet results in weakening of induction. It is worth remembering the thermal limit for a given model.

* Lifting capacity was assessed using a smooth steel plate of suitable thickness (min. 20 mm), under perpendicular pulling force, however under parallel forces the lifting capacity is smaller. Additionally, even a slight gap {between} the magnet and the plate decreases the lifting capacity.