XT-6 magnetyzery do silników - BENZYNA i LPG + olej - XT-6 magnetizer

Strengths as well as weaknesses of NdFeB magnets.

Apart from their strong magnetism, neodymium magnets have these key benefits:

• They have constant strength, and over around 10 years their attraction force decreases symbolically – ~1% (in testing),
• They are noted for resistance to demagnetization induced by external disturbances,
• In other words, due to the glossy layer of gold, the element is aesthetically pleasing,
• Magnets possess impressive magnetic induction on the working surface,
• Due to their durability and thermal resistance, neodymium magnets are capable of operate (depending on the shape) even at high temperatures reaching 230°C or more...
• Thanks to freedom in constructing and the capacity to adapt to specific needs,
• Universal use in future technologies – they serve a role in mass storage devices, drive modules, precision medical tools, and multitasking production systems.
• Relatively small size with high pulling force – neodymium magnets offer strong magnetic field in small dimensions, which makes them useful in compact constructions

Disadvantages of neodymium magnets:

• Brittleness is one of their disadvantages. Upon strong impact they can break. We advise keeping them in a special holder, which not only protects them against impacts but also raises their durability
• NdFeB magnets demagnetize when exposed to high temperatures. After reaching 80°C, many of them experience permanent drop of strength (a factor is the shape as well as dimensions of the magnet). We offer magnets specially adapted to work at temperatures up to 230°C marked [AH], which are very resistant to heat
• Due to the susceptibility of magnets to corrosion in a humid environment, we advise using waterproof magnets made of rubber, plastic or other material stable to moisture, in case of application outdoors
• Limited ability of making nuts in the magnet and complex shapes - preferred is cover - mounting mechanism.
• Potential hazard related to microscopic parts of magnets can be dangerous, when accidentally swallowed, which becomes key in the context of child health protection. Furthermore, small components of these products are able to be problematic in diagnostics medical in case of swallowing.
• Due to expensive raw materials, their price is relatively high,

Optimal lifting capacity of a neodymium magnet – what it depends on?

The load parameter shown concerns the limit force, recorded under ideal test conditions, specifically:

• with the use of a sheet made of special test steel, ensuring full magnetic saturation
• whose transverse dimension equals approx. 10 mm
• characterized by smoothness
• without the slightest air gap between the magnet and steel
• for force applied at a right angle (pull-off, not shear)
• at temperature approx. 20 degrees Celsius

Magnet lifting force in use – key factors

Please note that the working load will differ subject to the following factors, starting with the most relevant:

• Distance – existence of any layer (rust, dirt, air) interrupts the magnetic circuit, which reduces capacity steeply (even by 50% at 0.5 mm).
• Loading method – declared lifting capacity refers to pulling vertically. When slipping, the magnet exhibits much less (often approx. 20-30% of nominal force).
• Metal thickness – the thinner the sheet, the weaker the hold. Magnetic flux passes through the material instead of converting into lifting capacity.
• Metal type – not every steel reacts the same. High carbon content weaken the attraction effect.
• Surface finish – ideal contact is obtained only on smooth steel. Rough texture create air cushions, reducing force.
• Heat – NdFeB sinters have a negative temperature coefficient. When it is hot they are weaker, and at low temperatures gain strength (up to a certain limit).

* Lifting capacity testing was performed on plates with a smooth surface of suitable thickness, under perpendicular forces, however under attempts to slide the magnet the load capacity is reduced by as much as 5 times. In addition, even a minimal clearance {between} the magnet’s surface and the plate decreases the lifting capacity.