UMGB 75x28 [M8+M10] GW F200 +Lina GOBLIN / N38 - goblin magnetic holder

Strengths as well as weaknesses of NdFeB magnets.

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

• They virtually do not lose strength, because even after ten years the decline in efficiency is only ~1% (in laboratory conditions),
• They retain their magnetic properties even under external field action,
• Thanks to the shiny finish, the coating of Ni-Cu-Ni, gold-plated, or silver gives an aesthetic appearance,
• Magnets possess maximum magnetic induction on the outer layer,
• Through (adequate) combination of ingredients, they can achieve high thermal strength, enabling functioning at temperatures approaching 230°C and above...
• In view of the possibility of flexible shaping and customization to unique solutions, magnetic components can be manufactured in a variety of geometric configurations, which makes them more universal,
• Key role in modern industrial fields – they are used in HDD drives, motor assemblies, precision medical tools, as well as multitasking production systems.
• Thanks to efficiency per cm³, small magnets offer high operating force, in miniature format,

Cons of neodymium magnets and ways of using them

• To avoid cracks under impact, we recommend using special steel housings. Such a solution secures the magnet and simultaneously increases its durability.
• When exposed to high temperature, neodymium magnets experience a drop in strength. Often, when the temperature exceeds 80°C, their power decreases (depending on the size and shape of the magnet). For those who need magnets for extreme conditions, we offer [AH] versions withstanding up to 230°C
• They oxidize in a humid environment. For use outdoors we advise using waterproof magnets e.g. in rubber, plastic
• Due to limitations in producing threads and complex forms in magnets, we propose using a housing - magnetic mount.
• Potential hazard related to microscopic parts of magnets can be dangerous, when accidentally swallowed, which becomes key in the aspect of protecting the youngest. It is also worth noting that small components of these magnets can complicate diagnosis medical after entering the body.
• With large orders the cost of neodymium magnets is a challenge,

Maximum lifting capacity of the magnet – what contributes to it?

Holding force of 280 kg is a theoretical maximum value performed under specific, ideal conditions:

• on a base made of mild steel, optimally conducting the magnetic field
• whose thickness reaches at least 10 mm
• with a plane perfectly flat
• with direct contact (without impurities)
• under perpendicular force vector (90-degree angle)
• in neutral thermal conditions

Lifting capacity in practice – influencing factors

In practice, the real power results from many variables, listed from crucial:

• Gap (between the magnet and the plate), because even a tiny distance (e.g. 0.5 mm) leads to a decrease in lifting capacity by up to 50% (this also applies to varnish, corrosion or dirt).
• Direction of force – highest force is obtained only during perpendicular pulling. The force required to slide of the magnet along the surface is standardly several times smaller (approx. 1/5 of the lifting capacity).
• Substrate thickness – for full efficiency, the steel must be adequately massive. Thin sheet limits the lifting capacity (the magnet "punches through" it).
• Material composition – different alloys attracts identically. Alloy additives weaken the interaction with the magnet.
• Surface condition – smooth surfaces guarantee perfect abutment, which improves force. Rough surfaces weaken the grip.
• Thermal factor – high temperature weakens pulling force. Too high temperature can permanently demagnetize the magnet.

* Holding force was checked on a smooth steel plate of 20 mm thickness, when a perpendicular force was applied, however under parallel forces the holding force is lower. Moreover, even a minimal clearance {between} the magnet and the plate lowers the lifting capacity.