UMGB 75x28 [M10x3] GW F200 PLATINIUM + Lina GOBLIN / N52 - goblin magnetic holder

Strengths and weaknesses of rare earth magnets.

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

• Their strength is maintained, and after approximately ten years it drops only by ~1% (theoretically),
• They have excellent resistance to magnetic field loss due to external magnetic sources,
• A magnet with a smooth silver surface looks better,
• Magnets exhibit impressive magnetic induction on the active area,
• Made from properly selected components, these magnets show impressive resistance to high heat, enabling them to function (depending on their shape) at temperatures up to 230°C and above...
• Thanks to versatility in shaping and the capacity to adapt to unusual requirements,
• Significant place in innovative solutions – they are utilized in magnetic memories, motor assemblies, medical devices, and technologically advanced constructions.
• Compactness – despite small sizes they provide effective action, making them ideal for precision applications

Disadvantages of NdFeB magnets:

• To avoid cracks upon strong impacts, we recommend using special steel holders. Such a solution protects the magnet and simultaneously increases its durability.
• Neodymium magnets decrease their power 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 stability even at temperatures up to 230°C
• Magnets exposed to a humid environment can corrode. Therefore during using outdoors, we recommend using water-impermeable magnets made of rubber, plastic or other material protecting against moisture
• Due to limitations in realizing threads and complex forms in magnets, we recommend using cover - magnetic mount.
• Health risk related to microscopic parts of magnets are risky, when accidentally swallowed, which becomes key in the context of child health protection. Additionally, small elements of these devices can be problematic in diagnostics medical after entering the body.
• Due to neodymium price, their price is higher than average,

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

The lifting capacity listed is a theoretical maximum value performed under specific, ideal conditions:

• on a block made of structural steel, effectively closing the magnetic flux
• possessing a massiveness of min. 10 mm to ensure full flux closure
• with an polished contact surface
• under conditions of no distance (metal-to-metal)
• during pulling in a direction vertical to the mounting surface
• at standard ambient temperature

What influences lifting capacity in practice

Please note that the magnet holding may be lower depending on elements below, starting with the most relevant:

• Clearance – the presence of foreign body (paint, tape, air) acts as an insulator, which lowers capacity rapidly (even by 50% at 0.5 mm).
• Loading method – declared lifting capacity refers to detachment vertically. When applying parallel force, the magnet exhibits much less (typically approx. 20-30% of nominal force).
• Metal thickness – thin material does not allow full use of the magnet. Part of the magnetic field passes through the material instead of generating force.
• Metal type – not every steel reacts the same. Alloy additives weaken the attraction effect.
• Base smoothness – the more even the plate, the larger the contact zone and stronger the hold. Unevenness creates an air distance.
• 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 was measured with the use of a steel plate with a smooth surface of suitable thickness (min. 20 mm), under perpendicular detachment force, in contrast under parallel forces the lifting capacity is smaller. Moreover, even a small distance {between} the magnet and the plate reduces the lifting capacity.