SM 32x425 [2xM8] / N52 - magnetic separator

Pros as well as cons of rare earth magnets.

Besides their immense field intensity, neodymium magnets offer the following advantages:

• They do not lose magnetism, even over nearly ten years – the drop in power is only ~1% (theoretically),
• They show high resistance to demagnetization induced by external field influence,
• By using a reflective coating of silver, the element presents an elegant look,
• They are known for high magnetic induction at the operating surface, which affects their effectiveness,
• Neodymium magnets are characterized by very high magnetic induction on the magnet surface and are able to act (depending on the shape) even at a temperature of 230°C or more...
• Thanks to freedom in constructing and the capacity to customize to client solutions,
• Key role in modern industrial fields – they are utilized in magnetic memories, electromotive mechanisms, diagnostic systems, and other advanced devices.
• Thanks to their power density, small magnets offer high operating force, in miniature format,

Disadvantages of neodymium magnets:

• Brittleness is one of their disadvantages. Upon intense impact they can fracture. 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 suffer a drop in force. Often, when the temperature exceeds 80°C, their strength 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
• 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 prevent oxidation and corrosion.
• Due to limitations in creating nuts and complex shapes in magnets, we recommend using a housing - magnetic holder.
• Health risk resulting from small fragments of magnets can be dangerous, if swallowed, which becomes key in the context of child safety. Furthermore, small elements of these magnets 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

Highest magnetic holding force – what contributes to it?

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

• with the use of a yoke made of special test steel, ensuring maximum field concentration
• whose transverse dimension equals approx. 10 mm
• characterized by even structure
• with total lack of distance (without coatings)
• during detachment in a direction vertical to the mounting surface
• in stable room temperature

Determinants of practical lifting force of a magnet

Real force is influenced by working environment parameters, mainly (from priority):

• Gap between surfaces – every millimeter of distance (caused e.g. by veneer or dirt) significantly weakens the magnet efficiency, often by half at just 0.5 mm.
• Load vector – maximum parameter is reached only during perpendicular pulling. The force required to slide of the magnet along the plate is usually many times smaller (approx. 1/5 of the lifting capacity).
• Plate thickness – insufficiently thick steel causes magnetic saturation, causing part of the flux to be lost to the other side.
• Material composition – not every steel attracts identically. High carbon content worsen the interaction with the magnet.
• Surface structure – the more even the surface, the better the adhesion and higher the lifting capacity. Unevenness creates an air distance.
• Temperature influence – high temperature weakens pulling force. Exceeding the limit temperature can permanently damage the magnet.

* Lifting capacity testing was conducted on a smooth plate of optimal thickness, under perpendicular forces, whereas under attempts to slide the magnet the load capacity is reduced by as much as 5 times. Moreover, even a small distance {between} the magnet and the plate decreases the load capacity.

Pros as well as cons of rare earth magnets.

Besides their immense field intensity, neodymium magnets offer the following advantages:

• They do not lose magnetism, even over nearly ten years – the drop in power is only ~1% (theoretically),
• They show high resistance to demagnetization induced by external field influence,
• By using a reflective coating of silver, the element presents an elegant look,
• They are known for high magnetic induction at the operating surface, which affects their effectiveness,
• Neodymium magnets are characterized by very high magnetic induction on the magnet surface and are able to act (depending on the shape) even at a temperature of 230°C or more...
• Thanks to freedom in constructing and the capacity to customize to client solutions,
• Key role in modern industrial fields – they are utilized in magnetic memories, electromotive mechanisms, diagnostic systems, and other advanced devices.
• Thanks to their power density, small magnets offer high operating force, in miniature format,

Disadvantages of neodymium magnets:

• Brittleness is one of their disadvantages. Upon intense impact they can fracture. 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 suffer a drop in force. Often, when the temperature exceeds 80°C, their strength 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
• 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 prevent oxidation and corrosion.
• Due to limitations in creating nuts and complex shapes in magnets, we recommend using a housing - magnetic holder.
• Health risk resulting from small fragments of magnets can be dangerous, if swallowed, which becomes key in the context of child safety. Furthermore, small elements of these magnets 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

Highest magnetic holding force – what contributes to it?

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

• with the use of a yoke made of special test steel, ensuring maximum field concentration
• whose transverse dimension equals approx. 10 mm
• characterized by even structure
• with total lack of distance (without coatings)
• during detachment in a direction vertical to the mounting surface
• in stable room temperature

Determinants of practical lifting force of a magnet

Real force is influenced by working environment parameters, mainly (from priority):

• Gap between surfaces – every millimeter of distance (caused e.g. by veneer or dirt) significantly weakens the magnet efficiency, often by half at just 0.5 mm.
• Load vector – maximum parameter is reached only during perpendicular pulling. The force required to slide of the magnet along the plate is usually many times smaller (approx. 1/5 of the lifting capacity).
• Plate thickness – insufficiently thick steel causes magnetic saturation, causing part of the flux to be lost to the other side.
• Material composition – not every steel attracts identically. High carbon content worsen the interaction with the magnet.
• Surface structure – the more even the surface, the better the adhesion and higher the lifting capacity. Unevenness creates an air distance.
• Temperature influence – high temperature weakens pulling force. Exceeding the limit temperature can permanently damage the magnet.

* Lifting capacity testing was conducted on a smooth plate of optimal thickness, under perpendicular forces, whereas under attempts to slide the magnet the load capacity is reduced by as much as 5 times. Moreover, even a small distance {between} the magnet and the plate decreases the load capacity.