XT-4 magnetyzery CO i WODY użytkowej - XT-4 magnetizer

Advantages and disadvantages of neodymium magnets.

Besides their remarkable magnetic power, neodymium magnets offer the following advantages:

• Their power is maintained, and after around ten years it decreases only by ~1% (theoretically),
• They do not lose their magnetic properties even under strong external field,
• By covering with a decorative coating of silver, the element presents an nice look,
• Magnets exhibit huge magnetic induction on the outer side,
• Made from properly selected components, these magnets show impressive resistance to high heat, enabling them to function (depending on their form) at temperatures up to 230°C and above...
• Possibility of exact forming and modifying to individual applications,
• Universal use in modern industrial fields – they find application in data components, electric motors, precision medical tools, and industrial machines.
• Relatively small size with high pulling force – neodymium magnets offer high power in tiny dimensions, which enables their usage in miniature devices

Drawbacks and weaknesses of neodymium magnets: application proposals

• At strong impacts they can break, therefore we recommend placing them in steel cases. A metal housing provides additional protection against damage and increases the magnet's durability.
• We warn that neodymium magnets can lose their strength at high temperatures. To prevent this, we advise our specialized [AH] magnets, which work effectively even at 230°C.
• When exposed to humidity, magnets start to rust. To use them in conditions outside, it is recommended to use protective magnets, such as magnets in rubber or plastics, which secure oxidation and corrosion.
• We suggest casing - magnetic mount, due to difficulties in creating threads inside the magnet and complex shapes.
• Potential hazard to health – tiny shards of magnets pose a threat, when accidentally swallowed, which is particularly important in the context of child safety. It is also worth noting that small components of these products are able to disrupt the diagnostic process medical in case of swallowing.
• Due to expensive raw materials, their price exceeds standard values,

Maximum lifting force for a neodymium magnet – what it depends on?

The declared magnet strength represents the peak performance, obtained under optimal environment, namely:

• using a base made of high-permeability steel, serving as a circuit closing element
• whose thickness equals approx. 10 mm
• characterized by smoothness
• with direct contact (without paint)
• during detachment in a direction vertical to the mounting surface
• in neutral thermal conditions

Lifting capacity in practice – influencing factors

During everyday use, the real power is determined by a number of factors, listed from crucial:

• Gap (between the magnet and the plate), as even a microscopic distance (e.g. 0.5 mm) leads to a drastic drop in lifting capacity by up to 50% (this also applies to paint, rust or dirt).
• Angle of force application – highest force is reached only during perpendicular pulling. The force required to slide of the magnet along the plate is standardly several times lower (approx. 1/5 of the lifting capacity).
• Substrate thickness – to utilize 100% power, the steel must be adequately massive. Thin sheet restricts the attraction force (the magnet "punches through" it).
• Material type – the best choice is pure iron steel. Cast iron may generate lower lifting capacity.
• Surface quality – the smoother and more polished the surface, the larger the contact zone and higher the lifting capacity. Unevenness acts like micro-gaps.
• Operating temperature – NdFeB sinters have a sensitivity to temperature. At higher temperatures they lose power, and at low temperatures they can be stronger (up to a certain limit).

* Lifting capacity testing was conducted on plates with a smooth surface of suitable thickness, under a perpendicular pulling force, in contrast under shearing force the lifting capacity is smaller. In addition, even a small distance {between} the magnet and the plate reduces the lifting capacity.