UMGW 60x30x15 [M10] GW / N38 - magnetic holder internal thread

Pros and cons of neodymium magnets.

Besides their magnetic performance, neodymium magnets are valued for these benefits:

• They have constant strength, and over nearly 10 years their attraction force decreases symbolically – ~1% (in testing),
• Neodymium magnets remain exceptionally resistant to magnetic field loss caused by external field sources,
• By covering with a smooth layer of nickel, the element has an modern look,
• The surface of neodymium magnets generates a powerful magnetic field – this is a distinguishing feature,
• They are suitable for high-temperature applications, operating effectively at 230°C+ due to advanced heat resistance and form-specific properties,
• Thanks to freedom in shaping and the ability to customize to individual projects,
• Significant place in electronics industry – they are utilized in computer drives, electric drive systems, medical devices, as well as technologically advanced constructions.
• Thanks to their power density, small magnets offer high operating force, occupying minimum space,

What to avoid - cons of neodymium magnets and ways of using them

• Susceptibility to cracking is one of their disadvantages. Upon strong impact they can break. We recommend keeping them in a strong case, which not only secures them against impacts but also raises their durability
• We warn that neodymium magnets can reduce their power at high temperatures. To prevent this, we suggest our specialized [AH] magnets, which work effectively even at 230°C.
• They oxidize in a humid environment. For use outdoors we advise using waterproof magnets e.g. in rubber, plastic
• We recommend casing - magnetic holder, due to difficulties in producing threads inside the magnet and complex shapes.
• Potential hazard related to microscopic parts of magnets are risky, when accidentally swallowed, which becomes key in the context of child health protection. It is also worth noting that small elements of these products are able to complicate diagnosis medical in case of swallowing.
• With mass production the cost of neodymium magnets is a challenge,

Optimal lifting capacity of a neodymium magnet – what affects it?

The specified lifting capacity concerns the maximum value, obtained under optimal environment, specifically:

• on a base made of structural steel, perfectly concentrating the magnetic field
• whose transverse dimension reaches at least 10 mm
• with an ground contact surface
• under conditions of ideal adhesion (metal-to-metal)
• during pulling in a direction vertical to the mounting surface
• in stable room temperature

Magnet lifting force in use – key factors

Holding efficiency is affected by working environment parameters, mainly (from priority):

• Clearance – the presence of foreign body (rust, tape, gap) interrupts the magnetic circuit, which reduces capacity rapidly (even by 50% at 0.5 mm).
• Loading method – catalog parameter refers to detachment vertically. When applying parallel force, the magnet holds significantly lower power (typically approx. 20-30% of nominal force).
• Wall thickness – the thinner the sheet, the weaker the hold. Magnetic flux passes through the material instead of generating force.
• Metal type – not every steel reacts the same. High carbon content worsen the attraction effect.
• Surface condition – smooth surfaces ensure maximum contact, which improves force. Rough surfaces weaken the grip.
• Heat – NdFeB sinters have a negative temperature coefficient. When it is hot they lose power, and in frost they can be stronger (up to a certain limit).

* Lifting capacity was assessed by applying a smooth steel plate of suitable thickness (min. 20 mm), under vertically applied force, however under parallel forces the holding force is lower. In addition, even a small distance {between} the magnet’s surface and the plate decreases the load capacity.