RM R7 SUPER - 13000 Gs / N52 - magnetic distributor

Advantages and disadvantages of NdFeB magnets.

Besides their exceptional strength, neodymium magnets offer the following advantages:

• They have unchanged lifting capacity, and over around 10 years their performance decreases symbolically – ~1% (in testing),
• Magnets perfectly defend themselves against loss of magnetization caused by ambient magnetic noise,
• In other words, due to the aesthetic surface of silver, the element gains visual value,
• The surface of neodymium magnets generates a unique magnetic field – this is a key feature,
• Through (appropriate) combination of ingredients, they can achieve high thermal strength, enabling action at temperatures approaching 230°C and above...
• Thanks to versatility in forming and the ability to adapt to client solutions,
• Significant place in electronics industry – they are used in mass storage devices, brushless drives, diagnostic systems, as well as technologically advanced constructions.
• Compactness – despite small sizes they generate large force, making them ideal for precision applications

Disadvantages of NdFeB magnets:

• Brittleness is one of their disadvantages. Upon strong impact they can break. We advise keeping them in a strong case, which not only protects them against impacts but also increases their durability
• NdFeB magnets lose strength when exposed to high temperatures. After reaching 80°C, many of them experience permanent weakening of power (a factor is the shape and dimensions of the magnet). We offer magnets specially adapted to work at temperatures up to 230°C marked [AH], which are very 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 creating nuts and complex shapes in magnets, we recommend using cover - magnetic mount.
• Potential hazard to health – tiny shards of magnets pose a threat, if swallowed, which gains importance in the context of child safety. Furthermore, small components of these devices can complicate diagnosis medical in case of swallowing.
• With mass production the cost of neodymium magnets can be a barrier,

Best holding force of the magnet in ideal parameters – what affects it?

The lifting capacity listed is a measurement result conducted under the following configuration:

• on a base made of mild steel, optimally conducting the magnetic flux
• with a cross-section no less than 10 mm
• characterized by smoothness
• under conditions of no distance (metal-to-metal)
• during pulling in a direction vertical to the mounting surface
• in temp. approx. 20°C

Practical aspects of lifting capacity – factors

It is worth knowing that the application force will differ depending on the following factors, starting with the most relevant:

• Distance (between the magnet and the plate), because even a microscopic distance (e.g. 0.5 mm) can cause a decrease in lifting capacity by up to 50% (this also applies to varnish, corrosion or debris).
• Pull-off angle – remember that the magnet has greatest strength perpendicularly. Under sliding down, the capacity drops significantly, often to levels of 20-30% of the maximum value.
• Wall thickness – thin material does not allow full use of the magnet. Part of the magnetic field penetrates through instead of converting into lifting capacity.
• Metal type – different alloys attracts identically. Alloy additives weaken the interaction with the magnet.
• Surface quality – the smoother and more polished the plate, the better the adhesion and stronger the hold. Roughness creates an air distance.
• Thermal environment – temperature increase results in weakening of force. It is worth remembering the thermal limit for a given model.

* Lifting capacity testing was performed on plates with a smooth surface of optimal thickness, under perpendicular forces, however under shearing force the load capacity is reduced by as much as 5 times. In addition, even a minimal clearance {between} the magnet’s surface and the plate decreases the load capacity.