FM Ruszt magnetyczny do leja fi 200 jednopoziomowy / N52 - magnetic filter

Pros as well as cons of NdFeB magnets.

Besides their magnetic performance, neodymium magnets are valued for these benefits:

• They virtually do not lose strength, because even after 10 years the performance loss is only ~1% (based on calculations),
• Neodymium magnets remain extremely resistant to demagnetization caused by magnetic disturbances,
• In other words, due to the smooth layer of gold, the element gains visual value,
• They show high magnetic induction at the operating surface, which improves attraction properties,
• Due to their durability and thermal resistance, neodymium magnets are capable of operate (depending on the shape) even at high temperatures reaching 230°C or more...
• Thanks to versatility in constructing and the capacity to adapt to client solutions,
• Versatile presence in high-tech industry – they serve a role in mass storage devices, motor assemblies, medical devices, and multitasking production systems.
• Relatively small size with high pulling force – neodymium magnets offer impressive pulling force in small dimensions, which makes them useful in small systems

Disadvantages of neodymium magnets:

• At strong impacts they can break, therefore we recommend placing them in steel cases. A metal housing provides additional protection against damage and increases the magnet's durability.
• Neodymium magnets demagnetize when exposed to high temperatures. After reaching 80°C, many of them experience permanent drop of strength (a factor is the shape and dimensions of the magnet). We offer magnets specially adapted to work at temperatures up to 230°C marked [AH], which are very resistant to heat
• When exposed to humidity, magnets usually rust. For applications outside, it is recommended to use protective magnets, such as those in rubber or plastics, which secure oxidation as well as corrosion.
• We suggest cover - magnetic mount, due to difficulties in producing nuts inside the magnet and complicated forms.
• Potential hazard to health – tiny shards of magnets can be dangerous, when accidentally swallowed, which is particularly important in the aspect of protecting the youngest. It is also worth noting that small components of these products are able to be problematic in diagnostics medical when they are in the body.
• Due to complex production process, their price is relatively high,

Maximum magnetic pulling force – what contributes to it?

Breakaway force was defined for the most favorable conditions, including:

• with the application of a sheet made of low-carbon steel, guaranteeing maximum field concentration
• possessing a thickness of minimum 10 mm to avoid saturation
• characterized by lack of roughness
• with total lack of distance (no paint)
• during detachment in a direction perpendicular to the plane
• at ambient temperature room level

Practical lifting capacity: influencing factors

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

• Distance – the presence of any layer (paint, dirt, air) interrupts the magnetic circuit, which lowers capacity steeply (even by 50% at 0.5 mm).
• Loading method – declared lifting capacity refers to pulling vertically. When slipping, the magnet holds much less (often approx. 20-30% of maximum force).
• Wall thickness – the thinner the sheet, the weaker the hold. Magnetic flux passes through the material instead of generating force.
• Steel type – mild steel gives the best results. Higher carbon content reduce magnetic permeability and holding force.
• Surface quality – the more even the surface, the larger the contact zone and stronger the hold. Unevenness acts like micro-gaps.
• Temperature influence – high temperature reduces magnetic field. Too high temperature can permanently damage the magnet.

* Holding force was checked on a smooth steel plate of 20 mm thickness, when a perpendicular force was applied, whereas under parallel forces the load capacity is reduced by as much as fivefold. In addition, even a slight gap {between} the magnet and the plate lowers the load capacity.