UMP 75x25 [M10x3] GW F200 GOLD DUAL Lina / N42 - search holder

Advantages as well as disadvantages of neodymium magnets.

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

• Their strength remains stable, and after approximately ten years it decreases only by ~1% (according to research),
• They are resistant to demagnetization induced by external disturbances,
• By covering with a decorative layer of silver, the element gains an professional look,
• Magnets are characterized by exceptionally strong magnetic induction on the active area,
• Neodymium magnets are characterized by extremely high magnetic induction on the magnet surface and are able to act (depending on the form) even at a temperature of 230°C or more...
• Possibility of accurate creating as well as adjusting to specific applications,
• Significant place in modern technologies – they serve a role in hard drives, electric drive systems, medical equipment, also technologically advanced constructions.
• Thanks to concentrated force, small magnets offer high operating force, in miniature format,

Disadvantages of neodymium magnets:

• At very strong impacts they can crack, therefore we advise placing them in steel cases. A metal housing provides additional protection against damage, as well as increases the magnet's durability.
• We warn that neodymium magnets can reduce their power at high temperatures. To prevent this, we advise our specialized [AH] magnets, which work effectively even at 230°C.
• They oxidize in a humid environment - during use outdoors we advise using waterproof magnets e.g. in rubber, plastic
• Limited ability of creating nuts in the magnet and complex shapes - recommended is cover - mounting mechanism.
• Potential hazard to health – tiny shards of magnets are risky, if swallowed, which gains importance in the context of child safety. Additionally, small components of these products can disrupt the diagnostic process medical in case of swallowing.
• Due to neodymium price, their price is higher than average,

Breakaway strength of the magnet in ideal conditions – what affects it?

The lifting capacity listed is a measurement result performed under specific, ideal conditions:

• with the application of a yoke made of low-carbon steel, ensuring full magnetic saturation
• possessing a massiveness of at least 10 mm to ensure full flux closure
• with an ideally smooth contact surface
• under conditions of no distance (surface-to-surface)
• under perpendicular force vector (90-degree angle)
• at standard ambient temperature

Lifting capacity in practice – influencing factors

It is worth knowing that the application force may be lower subject to the following factors, starting with the most relevant:

• Space between surfaces – even a fraction of a millimeter of distance (caused e.g. by varnish or unevenness) significantly weakens the pulling force, often by half at just 0.5 mm.
• Force direction – catalog parameter refers to detachment vertically. When slipping, the magnet exhibits much less (typically approx. 20-30% of nominal force).
• Base massiveness – insufficiently thick sheet does not close the flux, causing part of the flux to be lost into the air.
• Material type – the best choice is high-permeability steel. Hardened steels may have worse magnetic properties.
• Surface condition – ground elements guarantee perfect abutment, which improves force. Uneven metal reduce efficiency.
• Temperature influence – hot environment weakens pulling force. Exceeding the limit temperature can permanently demagnetize the magnet.

* Lifting capacity testing was carried out on a smooth plate of suitable thickness, under a perpendicular pulling force, whereas under parallel forces the lifting capacity is smaller. Additionally, even a small distance {between} the magnet and the plate lowers the lifting capacity.