UMGB 75x28 [M8+M10] GW F200 +Lina GOBLIN / N38 - goblin magnetic holder

Pros as well as cons of NdFeB magnets.

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

• They virtually do not lose power, because even after ten years the performance loss is only ~1% (based on calculations),
• They are noted for resistance to demagnetization induced by presence of other magnetic fields,
• By applying a lustrous coating of gold, the element gains an proper look,
• The surface of neodymium magnets generates a intense magnetic field – this is a key feature,
• Made from properly selected components, these magnets show impressive resistance to high heat, enabling them to function (depending on their shape) at temperatures up to 230°C and above...
• Considering the potential of precise forming and customization to unique solutions, magnetic components can be manufactured in a variety of forms and dimensions, which expands the range of possible applications,
• Huge importance in future technologies – they find application in hard drives, electric drive systems, medical equipment, and modern 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 securing magnets using a steel holder. Such protection not only shields the magnet but also improves its resistance to damage
• Neodymium magnets lose power when exposed to high temperatures. After reaching 80°C, many of them experience permanent weakening of strength (a factor is the shape as well as dimensions of the magnet). We offer magnets specially adapted to work at temperatures up to 230°C marked [AH], which are extremely 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 prevent oxidation and corrosion.
• Due to limitations in producing threads and complicated forms in magnets, we propose using cover - magnetic mechanism.
• Possible danger related to microscopic parts of magnets can be dangerous, if swallowed, which gains importance in the aspect of protecting the youngest. It is also worth noting that small components of these devices can complicate diagnosis medical in case of swallowing.
• Due to complex production process, their price is higher than average,

Maximum lifting force for a neodymium magnet – what it depends on?

Magnet power was defined for optimal configuration, including:

• with the contact of a yoke made of special test steel, ensuring full magnetic saturation
• whose transverse dimension equals approx. 10 mm
• with an ground touching surface
• with direct contact (no paint)
• for force acting at a right angle (pull-off, not shear)
• in stable room temperature

Determinants of practical lifting force of a magnet

In practice, the real power results from many variables, presented from crucial:

• Space between surfaces – even a fraction of a millimeter of separation (caused e.g. by veneer or dirt) diminishes the pulling force, often by half at just 0.5 mm.
• Pull-off angle – note that the magnet holds strongest perpendicularly. Under shear forces, the capacity drops drastically, often to levels of 20-30% of the nominal value.
• Base massiveness – too thin sheet does not close the flux, causing part of the power to be wasted to the other side.
• Material type – ideal substrate is pure iron steel. Hardened steels may have worse magnetic properties.
• Surface structure – the more even the plate, the larger the contact zone and stronger the hold. Roughness creates an air distance.
• Temperature – heating the magnet causes a temporary drop of force. It is worth remembering the maximum operating temperature for a given model.

* Lifting capacity testing was carried out on plates with a smooth surface of optimal thickness, under perpendicular forces, however under attempts to slide the magnet the lifting capacity is smaller. Additionally, even a slight gap {between} the magnet’s surface and the plate lowers the lifting capacity.