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

Strengths as well as weaknesses of neodymium magnets.

Besides their stability, neodymium magnets are valued for these benefits:

• Their strength remains stable, and after around ten years it decreases only by ~1% (theoretically),
• They maintain their magnetic properties even under strong external field,
• By applying a lustrous layer of nickel, the element presents an nice look,
• Magnetic induction on the working part of the magnet remains impressive,
• Made from properly selected components, these magnets show impressive resistance to high heat, enabling them to function (depending on their form) at temperatures up to 230°C and above...
• Possibility of individual shaping and adapting to defined requirements,
• Versatile presence in future technologies – they are utilized in magnetic memories, electromotive mechanisms, medical devices, as well as multitasking production systems.
• Relatively small size with high pulling force – neodymium magnets offer impressive pulling force in tiny dimensions, which allows their use in compact constructions

Disadvantages of NdFeB magnets:

• Susceptibility to cracking is one of their disadvantages. Upon intense impact they can break. We advise keeping them in a strong case, which not only secures them against impacts but also increases their durability
• We warn that neodymium magnets can reduce their strength at high temperatures. To prevent this, we advise our specialized [AH] magnets, which work effectively even at 230°C.
• Magnets exposed to a humid environment can corrode. Therefore while using outdoors, we suggest using water-impermeable magnets made of rubber, plastic or other material protecting against moisture
• Limited possibility of producing nuts in the magnet and complicated forms - recommended is casing - mounting mechanism.
• Health risk to health – tiny shards of magnets can be dangerous, if swallowed, which is particularly important in the context of child health protection. It is also worth noting that small components of these products are able to complicate diagnosis medical when they are in the body.
• With budget limitations the cost of neodymium magnets is economically unviable,

Maximum holding power of the magnet – what contributes to it?

The force parameter is a theoretical maximum value performed under standard conditions:

• with the use of a sheet made of low-carbon steel, ensuring maximum field concentration
• possessing a massiveness of minimum 10 mm to avoid saturation
• characterized by smoothness
• under conditions of no distance (metal-to-metal)
• under vertical force vector (90-degree angle)
• at standard ambient temperature

Impact of factors on magnetic holding capacity in practice

It is worth knowing that the magnet holding may be lower subject to elements below, starting with the most relevant:

• Distance (between the magnet and the metal), as even a tiny clearance (e.g. 0.5 mm) leads to a decrease in lifting capacity by up to 50% (this also applies to paint, corrosion or dirt).
• Loading method – declared lifting capacity refers to detachment vertically. When slipping, the magnet exhibits much less (often approx. 20-30% of maximum force).
• Base massiveness – insufficiently thick sheet does not close the flux, causing part of the flux to be wasted to the other side.
• Steel type – low-carbon steel attracts best. Higher carbon content lower magnetic properties and lifting capacity.
• Smoothness – full contact is possible only on polished steel. Rough texture create air cushions, weakening the magnet.
• Temperature – heating the magnet causes a temporary drop of induction. Check the maximum operating temperature for a given model.

* Lifting capacity testing was performed on plates with a smooth surface of suitable thickness, under a perpendicular pulling force, in contrast under parallel forces the load capacity is reduced by as much as fivefold. Additionally, even a small distance {between} the magnet’s surface and the plate reduces the holding force.