UMGB 75x28 [M10x3] GW F200 PLATINIUM + Lina GOBLIN / N52 - goblin magnetic holder

Pros and cons of neodymium magnets.

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

• They do not lose power, even during nearly 10 years – the reduction in power is only ~1% (theoretically),
• Magnets effectively resist against demagnetization caused by foreign field sources,
• By applying a reflective coating of nickel, the element gains an aesthetic look,
• The surface of neodymium magnets generates a unique magnetic field – this is a distinguishing feature,
• Thanks to resistance to high temperature, they are able to function (depending on the shape) even at temperatures up to 230°C and higher...
• In view of the potential of precise molding and customization to specialized requirements, neodymium magnets can be manufactured in a wide range of forms and dimensions, which amplifies use scope,
• Universal use in electronics industry – they serve a role in data components, electric drive systems, precision medical tools, and modern systems.
• Compactness – despite small sizes they generate large force, making them ideal for precision applications

Disadvantages of NdFeB magnets:

• At very strong impacts they can break, therefore we recommend placing them in strong housings. 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 force. 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 producing threads and complex shapes in magnets, we propose using cover - magnetic mechanism.
• Health risk to health – tiny shards of magnets can be dangerous, in case of ingestion, which is particularly important in the context of child health protection. It is also worth noting that small elements of these products are able to be problematic in diagnostics medical after entering the body.
• High unit price – neodymium magnets cost more than other types of magnets (e.g. ferrite), which increases costs of application in large quantities

Maximum holding power of the magnet – what contributes to it?

The lifting capacity listed is a result of laboratory testing performed under standard conditions:

• using a base made of low-carbon steel, acting as a ideal flux conductor
• with a thickness no less than 10 mm
• characterized by lack of roughness
• under conditions of ideal adhesion (metal-to-metal)
• under vertical force vector (90-degree angle)
• at ambient temperature approx. 20 degrees Celsius

Determinants of practical lifting force of a magnet

Real force is affected by specific conditions, mainly (from priority):

• Distance (between the magnet and the plate), since even a microscopic clearance (e.g. 0.5 mm) can cause a decrease in force by up to 50% (this also applies to paint, corrosion or dirt).
• Force direction – catalog parameter refers to detachment vertically. When attempting to slide, the magnet exhibits much less (often approx. 20-30% of nominal force).
• Plate thickness – too thin plate does not close the flux, causing part of the flux to be wasted to the other side.
• Chemical composition of the base – low-carbon steel gives the best results. Alloy admixtures lower magnetic properties and holding force.
• Surface finish – full contact is possible only on smooth steel. Rough texture reduce the real contact area, weakening the magnet.
• Thermal factor – hot environment weakens magnetic field. Exceeding the limit temperature can permanently demagnetize the magnet.

* Lifting capacity was determined using a smooth steel plate of suitable thickness (min. 20 mm), under vertically applied force, whereas under shearing force the load capacity is reduced by as much as 5 times. Additionally, even a small distance {between} the magnet and the plate reduces the holding force.