RM R6 GOLF - 13000 Gs / N52 - magnetic distributor

Advantages as well as disadvantages of neodymium magnets.

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

• Their power is durable, and after around 10 years it drops only by ~1% (theoretically),
• They feature excellent resistance to magnetism drop as a result of opposing magnetic fields,
• By using a reflective coating of silver, the element gains an elegant look,
• They feature high magnetic induction at the operating surface, which affects their effectiveness,
• Through (adequate) combination of ingredients, they can achieve high thermal strength, enabling operation at temperatures approaching 230°C and above...
• Thanks to freedom in constructing and the ability to customize to unusual requirements,
• Wide application in advanced technology sectors – they serve a role in magnetic memories, electromotive mechanisms, medical devices, also technologically advanced constructions.
• Thanks to efficiency per cm³, small magnets offer high operating force, occupying minimum space,

Disadvantages of neodymium magnets:

• At strong impacts they can crack, therefore we recommend placing them in steel cases. A metal housing provides additional protection against damage, as well as increases the magnet's durability.
• Neodymium magnets decrease their power 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
• Due to the susceptibility of magnets to corrosion in a humid environment, we recommend using waterproof magnets made of rubber, plastic or other material resistant to moisture, when using outdoors
• Due to limitations in creating nuts and complex shapes in magnets, we propose using a housing - magnetic holder.
• Potential hazard to health – tiny shards of magnets are risky, in case of ingestion, which gains importance in the context of child health protection. Furthermore, tiny parts of these products can complicate diagnosis medical in case of swallowing.
• Higher cost of purchase is one of the disadvantages compared to ceramic magnets, especially in budget applications

Optimal lifting capacity of a neodymium magnet – what contributes to it?

Breakaway force was defined for the most favorable conditions, taking into account:

• on a plate made of structural steel, effectively closing the magnetic flux
• whose thickness equals approx. 10 mm
• characterized by smoothness
• with zero gap (no impurities)
• under axial force direction (90-degree angle)
• at ambient temperature approx. 20 degrees Celsius

Lifting capacity in real conditions – factors

In real-world applications, the actual lifting capacity results from many variables, presented from crucial:

• Air gap (betwixt the magnet and the metal), as even a microscopic distance (e.g. 0.5 mm) can cause a drastic drop in lifting capacity by up to 50% (this also applies to varnish, rust or debris).
• Pull-off angle – note that the magnet has greatest strength perpendicularly. Under sliding down, the capacity drops drastically, often to levels of 20-30% of the nominal value.
• Element thickness – to utilize 100% power, the steel must be sufficiently thick. Thin sheet limits the attraction force (the magnet "punches through" it).
• Material composition – different alloys reacts the same. High carbon content worsen the interaction with the magnet.
• Plate texture – ground elements ensure maximum contact, which improves field saturation. Uneven metal reduce efficiency.
• Thermal factor – hot environment reduces pulling force. Exceeding the limit temperature can permanently damage the magnet.

* Holding force was tested on the plate surface of 20 mm thickness, when the force acted perpendicularly, whereas under attempts to slide the magnet the lifting capacity is smaller. Moreover, even a slight gap {between} the magnet’s surface and the plate decreases the load capacity.