MPL 25x10x3 / N38 - lamellar magnet

Pros as well as cons of NdFeB magnets.

Apart from their consistent magnetic energy, neodymium magnets have these key benefits:

• They virtually do not lose strength, because even after 10 years the decline in efficiency is only ~1% (according to literature),
• Neodymium magnets remain highly resistant to magnetic field loss caused by external field sources,
• By covering with a smooth layer of silver, the element presents an modern look,
• Magnets are characterized by exceptionally strong magnetic induction on the active area,
• Neodymium magnets are characterized by extremely high magnetic induction on the magnet surface and can function (depending on the form) even at a temperature of 230°C or more...
• In view of the possibility of accurate molding and adaptation to unique projects, NdFeB magnets can be modeled in a broad palette of geometric configurations, which makes them more universal,
• Versatile presence in innovative solutions – they serve a role in hard drives, motor assemblies, medical devices, as well as industrial machines.
• Compactness – despite small sizes they offer powerful magnetic field, making them ideal for precision applications

Drawbacks and weaknesses of neodymium magnets: tips and applications.

• To avoid cracks under impact, we suggest using special steel holders. Such a solution protects the magnet and simultaneously improves its durability.
• We warn that neodymium magnets can lose their strength at high temperatures. To prevent this, we recommend our specialized [AH] magnets, which work effectively even at 230°C.
• When exposed to humidity, magnets usually rust. To use them in conditions outside, it is recommended to use protective magnets, such as those in rubber or plastics, which secure oxidation and corrosion.
• We suggest casing - magnetic mechanism, due to difficulties in producing threads inside the magnet and complex forms.
• Potential hazard related to microscopic parts of magnets pose a threat, if swallowed, which gains importance in the context of child health protection. Furthermore, small elements of these magnets can disrupt the diagnostic process medical after entering the body.
• Higher cost of purchase is one of the disadvantages compared to ceramic magnets, especially in budget applications

Highest magnetic holding force – what it depends on?

Magnet power was defined for optimal configuration, assuming:

• on a base made of structural steel, optimally conducting the magnetic flux
• with a thickness no less than 10 mm
• with an polished contact surface
• with total lack of distance (no impurities)
• for force acting at a right angle (in the magnet axis)
• in neutral thermal conditions

Determinants of practical lifting force of a magnet

Please note that the magnet holding may be lower subject to elements below, in order of importance:

• Gap between magnet and steel – every millimeter of distance (caused e.g. by veneer or dirt) significantly weakens the pulling force, often by half at just 0.5 mm.
• Pull-off angle – note that the magnet has greatest strength perpendicularly. Under sliding down, the holding force drops significantly, often to levels of 20-30% of the maximum value.
• Plate thickness – insufficiently thick sheet causes magnetic saturation, causing part of the flux to be lost into the air.
• Material composition – different alloys attracts identically. High carbon content weaken the attraction effect.
• Smoothness – full contact is possible only on smooth steel. Any scratches and bumps create air cushions, reducing force.
• Temperature – heating the magnet causes a temporary drop of induction. Check the thermal limit for a given model.

* Holding force was measured on the plate surface of 20 mm thickness, when a perpendicular force was applied, whereas under attempts to slide the magnet the holding force is lower. Moreover, even a minimal clearance {between} the magnet and the plate decreases the lifting capacity.