RM R7 SUPER - 13000 Gs / N52 - magnetic distributor

Advantages and disadvantages of NdFeB magnets.

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

• Their strength is durable, and after approximately 10 years it decreases only by ~1% (theoretically),
• Magnets effectively protect themselves against demagnetization caused by external fields,
• In other words, due to the metallic surface of silver, the element gains a professional look,
• The surface of neodymium magnets generates a intense magnetic field – this is one of their assets,
• Due to their durability and thermal resistance, neodymium magnets are capable of operate (depending on the shape) even at high temperatures reaching 230°C or more...
• Considering the potential of flexible shaping and adaptation to individualized needs, magnetic components can be produced in a variety of shapes and sizes, which amplifies use scope,
• Significant place in modern industrial fields – they find application in mass storage devices, drive modules, diagnostic systems, and complex engineering applications.
• Thanks to concentrated force, small magnets offer high operating force, in miniature format,

Disadvantages of NdFeB magnets:

• To avoid cracks upon strong impacts, we recommend using special steel housings. Such a solution protects the magnet and simultaneously improves its durability.
• Neodymium magnets lose their strength under the influence of heating. As soon as 80°C is exceeded, many of them start losing their power. Therefore, we recommend our special magnets marked [AH], which maintain durability even at temperatures up to 230°C
• They rust in a humid environment. For use outdoors we advise using waterproof magnets e.g. in rubber, plastic
• Due to limitations in producing threads and complicated forms in magnets, we recommend using cover - magnetic mount.
• Potential hazard related to microscopic parts of magnets pose a threat, when accidentally swallowed, which gains importance in the aspect of protecting the youngest. Additionally, small components of these products are able to disrupt the diagnostic process medical when they are in the body.
• Higher cost of purchase is a significant factor to consider compared to ceramic magnets, especially in budget applications

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

The force parameter is a result of laboratory testing performed under standard conditions:

• using a base made of mild steel, serving as a magnetic yoke
• with a cross-section no less than 10 mm
• characterized by smoothness
• with zero gap (no impurities)
• under axial force direction (90-degree angle)
• at conditions approx. 20°C

Practical lifting capacity: influencing factors

Holding efficiency is affected by specific conditions, mainly (from most important):

• Gap (betwixt the magnet and the plate), since even a microscopic distance (e.g. 0.5 mm) results in a reduction in force by up to 50% (this also applies to paint, corrosion or debris).
• Angle of force application – maximum parameter is reached only during perpendicular pulling. The shear force of the magnet along the surface is usually several times smaller (approx. 1/5 of the lifting capacity).
• Wall thickness – the thinner the sheet, the weaker the hold. Part of the magnetic field passes through the material instead of generating force.
• Metal type – different alloys reacts the same. High carbon content worsen the attraction effect.
• Smoothness – full contact is possible only on smooth steel. Any scratches and bumps reduce the real contact area, reducing force.
• Thermal environment – temperature increase results in weakening of force. Check the maximum operating temperature for a given model.

* Holding force was tested on a smooth steel plate of 20 mm thickness, when the force acted perpendicularly, however under attempts to slide the magnet the holding force is lower. In addition, even a small distance {between} the magnet’s surface and the plate lowers the lifting capacity.