SM 19x225 [2xM6] / N50 - magnetic separator

Strengths as well as weaknesses of rare earth magnets.

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

• They virtually do not lose power, because even after ten years the performance loss is only ~1% (according to literature),
• Magnets effectively defend themselves against demagnetization caused by foreign field sources,
• The use of an elegant coating of noble metals (nickel, gold, silver) causes the element to present itself better,
• Magnetic induction on the working layer of the magnet remains maximum,
• Thanks to resistance to high temperature, they can operate (depending on the shape) even at temperatures up to 230°C and higher...
• Thanks to freedom in constructing and the ability to customize to specific needs,
• Key role in advanced technology sectors – they serve a role in HDD drives, electromotive mechanisms, medical equipment, also complex engineering applications.
• Relatively small size with high pulling force – neodymium magnets offer high power in compact 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 steel housing, which not only protects them against impacts but also increases their durability
• When exposed to high temperature, neodymium magnets experience a drop in power. Often, when the temperature exceeds 80°C, their power decreases (depending on the size, as well as shape of the magnet). For those who need magnets for extreme conditions, we offer [AH] versions withstanding up to 230°C
• Due to the susceptibility of magnets to corrosion in a humid environment, we advise using waterproof magnets made of rubber, plastic or other material immune to moisture, when using outdoors
• Limited possibility of producing nuts in the magnet and complex shapes - recommended is casing - mounting mechanism.
• Potential hazard related to microscopic parts of magnets are risky, in case of ingestion, which is particularly important in the aspect of protecting the youngest. It is also worth noting that small elements of these products can complicate diagnosis medical after entering the body.
• Higher cost of purchase is one of the disadvantages compared to ceramic magnets, especially in budget applications

Optimal lifting capacity of a neodymium magnet – what affects it?

The specified lifting capacity represents the peak performance, recorded under laboratory conditions, specifically:

• using a plate made of low-carbon steel, functioning as a circuit closing element
• possessing a thickness of minimum 10 mm to ensure full flux closure
• with an ideally smooth touching surface
• with total lack of distance (without coatings)
• during detachment in a direction perpendicular to the mounting surface
• in neutral thermal conditions

Lifting capacity in real conditions – factors

Please note that the application force will differ subject to the following factors, starting with the most relevant:

• Distance (betwixt the magnet and the metal), as even a microscopic distance (e.g. 0.5 mm) leads to a reduction in lifting capacity by up to 50% (this also applies to varnish, corrosion or dirt).
• Loading method – catalog parameter refers to pulling vertically. When applying parallel force, the magnet exhibits much less (often approx. 20-30% of maximum force).
• Plate thickness – insufficiently thick plate causes magnetic saturation, causing part of the power to be escaped to the other side.
• Material type – ideal substrate is pure iron steel. Cast iron may generate lower lifting capacity.
• Surface finish – ideal contact is possible only on polished steel. Any scratches and bumps reduce the real contact area, reducing force.
• Thermal environment – temperature increase causes a temporary drop of induction. It is worth remembering the maximum operating temperature for a given model.

* Holding force was measured on the plate surface of 20 mm thickness, when a perpendicular force was applied, however under parallel forces the load capacity is reduced by as much as 5 times. Moreover, even a small distance {between} the magnet’s surface and the plate decreases the lifting capacity.

Strengths as well as weaknesses of rare earth magnets.

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

• They virtually do not lose power, because even after ten years the performance loss is only ~1% (according to literature),
• Magnets effectively defend themselves against demagnetization caused by foreign field sources,
• The use of an elegant coating of noble metals (nickel, gold, silver) causes the element to present itself better,
• Magnetic induction on the working layer of the magnet remains maximum,
• Thanks to resistance to high temperature, they can operate (depending on the shape) even at temperatures up to 230°C and higher...
• Thanks to freedom in constructing and the ability to customize to specific needs,
• Key role in advanced technology sectors – they serve a role in HDD drives, electromotive mechanisms, medical equipment, also complex engineering applications.
• Relatively small size with high pulling force – neodymium magnets offer high power in compact 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 steel housing, which not only protects them against impacts but also increases their durability
• When exposed to high temperature, neodymium magnets experience a drop in power. Often, when the temperature exceeds 80°C, their power decreases (depending on the size, as well as shape of the magnet). For those who need magnets for extreme conditions, we offer [AH] versions withstanding up to 230°C
• Due to the susceptibility of magnets to corrosion in a humid environment, we advise using waterproof magnets made of rubber, plastic or other material immune to moisture, when using outdoors
• Limited possibility of producing nuts in the magnet and complex shapes - recommended is casing - mounting mechanism.
• Potential hazard related to microscopic parts of magnets are risky, in case of ingestion, which is particularly important in the aspect of protecting the youngest. It is also worth noting that small elements of these products can complicate diagnosis medical after entering the body.
• Higher cost of purchase is one of the disadvantages compared to ceramic magnets, especially in budget applications

Optimal lifting capacity of a neodymium magnet – what affects it?

The specified lifting capacity represents the peak performance, recorded under laboratory conditions, specifically:

• using a plate made of low-carbon steel, functioning as a circuit closing element
• possessing a thickness of minimum 10 mm to ensure full flux closure
• with an ideally smooth touching surface
• with total lack of distance (without coatings)
• during detachment in a direction perpendicular to the mounting surface
• in neutral thermal conditions

Lifting capacity in real conditions – factors

Please note that the application force will differ subject to the following factors, starting with the most relevant:

• Distance (betwixt the magnet and the metal), as even a microscopic distance (e.g. 0.5 mm) leads to a reduction in lifting capacity by up to 50% (this also applies to varnish, corrosion or dirt).
• Loading method – catalog parameter refers to pulling vertically. When applying parallel force, the magnet exhibits much less (often approx. 20-30% of maximum force).
• Plate thickness – insufficiently thick plate causes magnetic saturation, causing part of the power to be escaped to the other side.
• Material type – ideal substrate is pure iron steel. Cast iron may generate lower lifting capacity.
• Surface finish – ideal contact is possible only on polished steel. Any scratches and bumps reduce the real contact area, reducing force.
• Thermal environment – temperature increase causes a temporary drop of induction. It is worth remembering the maximum operating temperature for a given model.

* Holding force was measured on the plate surface of 20 mm thickness, when a perpendicular force was applied, however under parallel forces the load capacity is reduced by as much as 5 times. Moreover, even a small distance {between} the magnet’s surface and the plate decreases the lifting capacity.