UMP 75x25 [M10x3] GW F200 PLATINIUM / N52 - search holder

Pros and cons of neodymium magnets.

In addition to their long-term stability, neodymium magnets provide the following advantages:

• They retain full power for around ten years – the drop is just ~1% (based on simulations),
• Magnets perfectly resist against demagnetization caused by foreign field sources,
• The use of an shiny coating of noble metals (nickel, gold, silver) causes the element to look better,
• Neodymium magnets generate maximum magnetic induction on a contact point, which allows for strong attraction,
• Through (appropriate) combination of ingredients, they can achieve high thermal strength, allowing for operation at temperatures approaching 230°C and above...
• Thanks to freedom in designing and the ability to modify to client solutions,
• Key role in advanced technology sectors – they are utilized in HDD drives, electric motors, precision medical tools, as well as industrial machines.
• Compactness – despite small sizes they offer powerful magnetic field, making them ideal for precision applications

Characteristics of disadvantages of neodymium magnets: tips and applications.

• At very strong impacts they can break, therefore we advise placing them in steel cases. A metal housing provides additional protection against damage and increases the magnet's durability.
• NdFeB magnets lose force when exposed to high temperatures. After reaching 80°C, many of them experience permanent weakening of strength (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
• Due to the susceptibility of magnets to corrosion in a humid environment, we recommend using waterproof magnets made of rubber, plastic or other material immune to moisture, when using outdoors
• Due to limitations in producing threads and complex forms in magnets, we propose using a housing - magnetic mechanism.
• Potential hazard resulting from small fragments of magnets pose a threat, when accidentally swallowed, which becomes key in the context of child health protection. Additionally, tiny parts of these products are able to complicate diagnosis medical when they are in the body.
• Due to complex production process, their price exceeds standard values,

Maximum lifting capacity of the magnet – what it depends on?

The load parameter shown concerns the maximum value, measured under laboratory conditions, specifically:

• with the contact of a yoke made of low-carbon steel, ensuring full magnetic saturation
• 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 plane
• at room temperature

Determinants of lifting force in real conditions

Real force is affected by specific conditions, including (from most important):

• Gap (betwixt the magnet and the plate), as even a tiny clearance (e.g. 0.5 mm) leads to a decrease in lifting capacity by up to 50% (this also applies to paint, corrosion or dirt).
• Force direction – note that the magnet has greatest strength perpendicularly. Under sliding down, the holding force drops significantly, often to levels of 20-30% of the nominal value.
• Wall thickness – thin material does not allow full use of the magnet. Magnetic flux penetrates through instead of generating force.
• Steel type – mild steel gives the best results. Alloy steels decrease magnetic properties and holding force.
• Surface quality – the more even the surface, the larger the contact zone and higher the lifting capacity. Unevenness creates an air distance.
• Thermal factor – high temperature weakens pulling force. Too high temperature can permanently damage the magnet.

* Lifting capacity testing was carried out on a smooth plate of suitable thickness, under perpendicular forces, in contrast under shearing force the load capacity is reduced by as much as 75%. In addition, even a minimal clearance {between} the magnet’s surface and the plate reduces the load capacity.