SM 25x275 [2xM8] / N52 - magnetic separator

Pros as well as cons of rare earth magnets.

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

• They do not lose strength, even during around 10 years – the reduction in strength is only ~1% (based on measurements),
• Magnets perfectly resist against loss of magnetization caused by external fields,
• Thanks to the elegant finish, the layer of nickel, gold, or silver gives an visually attractive appearance,
• The surface of neodymium magnets generates a unique magnetic field – this is a key feature,
• Neodymium magnets are characterized by very high magnetic induction on the magnet surface and are able to act (depending on the form) even at a temperature of 230°C or more...
• Thanks to versatility in forming and the ability to modify to individual projects,
• Key role in innovative solutions – they are commonly used in hard drives, drive modules, diagnostic systems, and modern systems.
• Compactness – despite small sizes they offer powerful magnetic field, making them ideal for precision applications

Disadvantages of neodymium magnets:

• At very strong impacts they can crack, therefore we advise placing them in strong housings. A metal housing provides additional protection against damage and increases the magnet's durability.
• When exposed to high temperature, neodymium magnets experience 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
• Magnets exposed to a humid environment can rust. Therefore while using outdoors, we advise using water-impermeable magnets made of rubber, plastic or other material protecting against moisture
• We recommend cover - magnetic mechanism, due to difficulties in realizing nuts inside the magnet and complex forms.
• Potential hazard to health – tiny shards of magnets can be dangerous, if swallowed, which becomes key in the aspect of protecting the youngest. It is also worth noting that tiny parts of these devices are able to disrupt the diagnostic process medical when they are in the body.
• With mass production the cost of neodymium magnets can be a barrier,

Breakaway strength of the magnet in ideal conditions – what it depends on?

Holding force of 0.00 kg is a result of laboratory testing executed under the following configuration:

• with the contact of a sheet made of low-carbon steel, ensuring maximum field concentration
• with a cross-section no less than 10 mm
• with a plane perfectly flat
• without any air gap between the magnet and steel
• under axial application of breakaway force (90-degree angle)
• in temp. approx. 20°C

What influences lifting capacity in practice

In practice, the actual lifting capacity is determined by several key aspects, listed from crucial:

• Air gap (betwixt the magnet and the metal), since even a very small distance (e.g. 0.5 mm) can cause a reduction in force by up to 50% (this also applies to paint, corrosion or debris).
• Direction of force – maximum parameter is available only during pulling at a 90° angle. The force required to slide of the magnet along the plate is usually many times lower (approx. 1/5 of the lifting capacity).
• Element thickness – to utilize 100% power, the steel must be adequately massive. Paper-thin metal restricts the attraction force (the magnet "punches through" it).
• Material composition – not every steel reacts the same. Alloy additives worsen the attraction effect.
• Plate texture – ground elements guarantee perfect abutment, which increases field saturation. Rough surfaces reduce efficiency.
• Operating temperature – NdFeB sinters have a negative temperature coefficient. When it is hot they lose power, and in frost they can be stronger (up to a certain limit).

* Lifting capacity was assessed with the use of a polished steel plate of suitable thickness (min. 20 mm), under vertically applied force, whereas under parallel forces the lifting capacity is smaller. Additionally, even a slight gap {between} the magnet’s surface and the plate lowers the lifting capacity.

Pros as well as cons of rare earth magnets.

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

• They do not lose strength, even during around 10 years – the reduction in strength is only ~1% (based on measurements),
• Magnets perfectly resist against loss of magnetization caused by external fields,
• Thanks to the elegant finish, the layer of nickel, gold, or silver gives an visually attractive appearance,
• The surface of neodymium magnets generates a unique magnetic field – this is a key feature,
• Neodymium magnets are characterized by very high magnetic induction on the magnet surface and are able to act (depending on the form) even at a temperature of 230°C or more...
• Thanks to versatility in forming and the ability to modify to individual projects,
• Key role in innovative solutions – they are commonly used in hard drives, drive modules, diagnostic systems, and modern systems.
• Compactness – despite small sizes they offer powerful magnetic field, making them ideal for precision applications

Disadvantages of neodymium magnets:

• At very strong impacts they can crack, therefore we advise placing them in strong housings. A metal housing provides additional protection against damage and increases the magnet's durability.
• When exposed to high temperature, neodymium magnets experience 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
• Magnets exposed to a humid environment can rust. Therefore while using outdoors, we advise using water-impermeable magnets made of rubber, plastic or other material protecting against moisture
• We recommend cover - magnetic mechanism, due to difficulties in realizing nuts inside the magnet and complex forms.
• Potential hazard to health – tiny shards of magnets can be dangerous, if swallowed, which becomes key in the aspect of protecting the youngest. It is also worth noting that tiny parts of these devices are able to disrupt the diagnostic process medical when they are in the body.
• With mass production the cost of neodymium magnets can be a barrier,

Breakaway strength of the magnet in ideal conditions – what it depends on?

Holding force of 0.00 kg is a result of laboratory testing executed under the following configuration:

• with the contact of a sheet made of low-carbon steel, ensuring maximum field concentration
• with a cross-section no less than 10 mm
• with a plane perfectly flat
• without any air gap between the magnet and steel
• under axial application of breakaway force (90-degree angle)
• in temp. approx. 20°C

What influences lifting capacity in practice

In practice, the actual lifting capacity is determined by several key aspects, listed from crucial:

• Air gap (betwixt the magnet and the metal), since even a very small distance (e.g. 0.5 mm) can cause a reduction in force by up to 50% (this also applies to paint, corrosion or debris).
• Direction of force – maximum parameter is available only during pulling at a 90° angle. The force required to slide of the magnet along the plate is usually many times lower (approx. 1/5 of the lifting capacity).
• Element thickness – to utilize 100% power, the steel must be adequately massive. Paper-thin metal restricts the attraction force (the magnet "punches through" it).
• Material composition – not every steel reacts the same. Alloy additives worsen the attraction effect.
• Plate texture – ground elements guarantee perfect abutment, which increases field saturation. Rough surfaces reduce efficiency.
• Operating temperature – NdFeB sinters have a negative temperature coefficient. When it is hot they lose power, and in frost they can be stronger (up to a certain limit).

* Lifting capacity was assessed with the use of a polished steel plate of suitable thickness (min. 20 mm), under vertically applied force, whereas under parallel forces the lifting capacity is smaller. Additionally, even a slight gap {between} the magnet’s surface and the plate lowers the lifting capacity.