XT-4 magnetyzery CO i WODY użytkowej - XT-4 magnetizer

Advantages as well as disadvantages of neodymium magnets.

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

• Their strength remains stable, and after approximately 10 years it decreases only by ~1% (according to research),
• Neodymium magnets are exceptionally resistant to demagnetization caused by external magnetic fields,
• A magnet with a shiny nickel surface is more attractive,
• Neodymium magnets create maximum magnetic induction on a small area, which allows for strong attraction,
• Neodymium magnets are characterized by very high magnetic induction on the magnet surface and can work (depending on the shape) even at a temperature of 230°C or more...
• Thanks to flexibility in forming and the ability to modify to client solutions,
• Significant place in advanced technology sectors – they are utilized in data components, electric drive systems, medical equipment, and other advanced devices.
• Relatively small size with high pulling force – neodymium magnets offer impressive pulling force in tiny dimensions, which makes them useful in small systems

Disadvantages of NdFeB magnets:

• To avoid cracks upon strong impacts, we suggest using special steel housings. Such a solution protects the magnet and simultaneously improves its durability.
• Neodymium magnets decrease their force under the influence of heating. As soon as 80°C is exceeded, many of them start losing their power. Therefore, we recommend our special magnets marked [AH], which maintain stability even at temperatures 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 resistant to moisture, when using outdoors
• Due to limitations in producing threads and complex forms in magnets, we propose using casing - magnetic mount.
• Possible danger to health – tiny shards of magnets are risky, if swallowed, which becomes key in the context of child safety. Additionally, tiny parts of these magnets can complicate diagnosis medical when they are in the body.
• With budget limitations the cost of neodymium magnets can be a barrier,

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

The declared magnet strength concerns the maximum value, recorded under ideal test conditions, meaning:

• using a sheet made of low-carbon steel, functioning as a circuit closing element
• with a cross-section minimum 10 mm
• with a surface perfectly flat
• under conditions of no distance (metal-to-metal)
• for force applied at a right angle (pull-off, not shear)
• at ambient temperature approx. 20 degrees Celsius

What influences lifting capacity in practice

It is worth knowing that the working load will differ 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 varnish or unevenness) significantly weakens the magnet efficiency, often by half at just 0.5 mm.
• Load vector – highest force is obtained only during perpendicular pulling. The shear force of the magnet along the surface is standardly many times smaller (approx. 1/5 of the lifting capacity).
• Metal thickness – the thinner the sheet, the weaker the hold. Part of the magnetic field penetrates through instead of generating force.
• Material type – the best choice is high-permeability steel. Stainless steels may have worse magnetic properties.
• Surface quality – the smoother and more polished the plate, the larger the contact zone and stronger the hold. Unevenness acts like micro-gaps.
• Heat – neodymium magnets have a sensitivity to temperature. When it is hot they lose power, 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 perpendicular forces, in contrast under parallel forces the load capacity is reduced by as much as fivefold. Moreover, even a slight gap {between} the magnet and the plate decreases the load capacity.