SM 32x375 [2xM8] / N52 - magnetic separator

Pros as well as cons of neodymium magnets.

Apart from their strong power, neodymium magnets have these key benefits:

• They do not lose strength, even over nearly ten years – the decrease in lifting capacity is only ~1% (according to tests),
• They have excellent resistance to magnetic field loss as a result of opposing magnetic fields,
• In other words, due to the shiny layer of silver, the element gains visual value,
• Magnets have maximum magnetic induction on the outer side,
• Due to their durability and thermal resistance, neodymium magnets are capable of operate (depending on the form) even at high temperatures reaching 230°C or more...
• Due to the potential of free molding and customization to unique projects, NdFeB magnets can be created in a wide range of geometric configurations, which expands the range of possible applications,
• Key role in future technologies – they find application in hard drives, electric drive systems, medical equipment, also multitasking production systems.
• Compactness – despite small sizes they provide effective action, making them ideal for precision applications

Disadvantages of neodymium magnets:

• They are prone to damage upon too strong impacts. To avoid cracks, it is worth protecting magnets in a protective case. Such protection not only shields the magnet but also improves its resistance to damage
• Neodymium magnets decrease their strength under the influence of heating. As soon as 80°C is exceeded, many of them start losing their force. Therefore, we recommend our special magnets marked [AH], which maintain stability even at temperatures up to 230°C
• Due to the susceptibility of magnets to corrosion in a humid environment, we recommend using waterproof magnets made of rubber, plastic or other material stable to moisture, in case of application outdoors
• Limited ability of making threads in the magnet and complex forms - preferred is casing - mounting mechanism.
• Health risk resulting from small fragments 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 devices are able to complicate diagnosis medical when they are in the body.
• With large orders the cost of neodymium magnets can be a barrier,

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

Holding force of 0 kg is a result of laboratory testing performed under standard conditions:

• on a block made of structural steel, perfectly concentrating the magnetic flux
• whose thickness is min. 10 mm
• characterized by smoothness
• under conditions of no distance (surface-to-surface)
• under vertical force vector (90-degree angle)
• at standard ambient temperature

Key elements affecting lifting force

Please note that the working load may be lower subject to elements below, starting with the most relevant:

• Clearance – the presence of foreign body (paint, tape, gap) interrupts the magnetic circuit, which lowers power rapidly (even by 50% at 0.5 mm).
• Angle of force application – maximum parameter is reached only during perpendicular pulling. The force required to slide of the magnet along the plate is typically many times smaller (approx. 1/5 of the lifting capacity).
• Substrate thickness – for full efficiency, the steel must be adequately massive. Thin sheet restricts the attraction force (the magnet "punches through" it).
• Chemical composition of the base – low-carbon steel gives the best results. Alloy steels reduce magnetic properties and holding force.
• Base smoothness – the more even the plate, the better the adhesion and higher the lifting capacity. Roughness creates an air distance.
• Temperature – temperature increase results in weakening of force. Check the maximum operating temperature for a given model.

* Lifting capacity testing was conducted on a smooth plate of suitable thickness, under perpendicular forces, however under parallel forces the load capacity is reduced by as much as 5 times. Moreover, even a small distance {between} the magnet and the plate reduces the load capacity.