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

Pros as well as cons of neodymium magnets.

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

• They have stable power, and over nearly ten years their performance decreases symbolically – ~1% (in testing),
• They maintain their magnetic properties even under close interference source,
• Thanks to the shimmering finish, the surface of nickel, gold, or silver gives an visually attractive appearance,
• Neodymium magnets create maximum magnetic induction on a small area, which increases force concentration,
• Neodymium magnets are characterized by extremely 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 the option of accurate shaping and customization to individualized projects, magnetic components can be created in a variety of shapes and sizes, which amplifies use scope,
• Huge importance in future technologies – they are used in HDD drives, brushless drives, diagnostic systems, also complex engineering applications.
• Relatively small size with high pulling force – neodymium magnets offer impressive pulling force in tiny dimensions, which enables their usage in small systems

Disadvantages of neodymium magnets:

• To avoid cracks under impact, we suggest using special steel housings. Such a solution secures the magnet and simultaneously increases its durability.
• Neodymium magnets lose their force 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 rust. Therefore during using outdoors, we suggest using waterproof magnets made of rubber, plastic or other material protecting against moisture
• We recommend casing - magnetic mechanism, due to difficulties in producing nuts inside the magnet and complex forms.
• Possible danger resulting from small fragments of magnets pose a threat, if swallowed, which is particularly important in the aspect of protecting the youngest. Additionally, small elements of these products can complicate diagnosis medical after entering the body.
• Due to neodymium price, their price is higher than average,

Best holding force of the magnet in ideal parameters – what affects it?

The lifting capacity listed is a measurement result executed under standard conditions:

• on a block made of structural steel, optimally conducting the magnetic field
• with a thickness no less than 10 mm
• with a plane free of scratches
• under conditions of gap-free contact (surface-to-surface)
• under axial application of breakaway force (90-degree angle)
• at ambient temperature approx. 20 degrees Celsius

Lifting capacity in practice – influencing factors

Holding efficiency impacted by working environment parameters, such as (from priority):

• Gap between magnet and steel – every millimeter of separation (caused e.g. by varnish or dirt) significantly weakens the pulling force, often by half at just 0.5 mm.
• Pull-off angle – remember that the magnet holds strongest perpendicularly. Under sliding down, the capacity drops drastically, often to levels of 20-30% of the maximum value.
• Element thickness – to utilize 100% power, the steel must be sufficiently thick. Paper-thin metal limits the attraction force (the magnet "punches through" it).
• Steel grade – ideal substrate is pure iron steel. Stainless steels may generate lower lifting capacity.
• Base smoothness – the smoother and more polished the plate, the better the adhesion and higher the lifting capacity. Roughness acts like micro-gaps.
• Thermal environment – heating the magnet causes a temporary drop of force. It is worth remembering the thermal limit for a given model.

* Holding force was tested on the plate surface of 20 mm thickness, when the force acted perpendicularly, however under attempts to slide the magnet the load capacity is reduced by as much as 75%. Additionally, even a small distance {between} the magnet’s surface and the plate lowers the holding force.