XT-6 magnetyzery do silników - BENZYNA + POWIETRZE - XT-6 magnetizer

Advantages as well as disadvantages of neodymium magnets.

Besides their tremendous pulling force, neodymium magnets offer the following advantages:

• They do not lose magnetism, even over nearly ten years – the decrease in strength is only ~1% (theoretically),
• They maintain their magnetic properties even under strong external field,
• A magnet with a metallic nickel surface has better aesthetics,
• The surface of neodymium magnets generates a intense magnetic field – this is a key feature,
• Due to their durability and thermal resistance, neodymium magnets are capable of operate (depending on the form) even at high temperatures reaching 230°C or more...
• Possibility of accurate machining as well as modifying to individual needs,
• Huge importance in future technologies – they serve a role in computer drives, motor assemblies, precision medical tools, also industrial machines.
• Relatively small size with high pulling force – neodymium magnets offer impressive pulling force in compact dimensions, which enables their usage in compact constructions

Disadvantages of neodymium magnets:

• At strong impacts they can break, therefore we advise placing them in special holders. A metal housing provides additional protection against damage and increases the magnet's durability.
• Neodymium magnets lose their strength 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
• They rust in a humid environment - during use outdoors we advise using waterproof magnets e.g. in rubber, plastic
• Limited ability of producing nuts in the magnet and complicated shapes - preferred is a housing - magnet mounting.
• Potential hazard to health – tiny shards of magnets are risky, in case of ingestion, which becomes key in the context of child health protection. Furthermore, tiny parts of these magnets 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

Highest magnetic holding force – what contributes to it?

Holding force of 0 kg is a measurement result conducted under the following configuration:

• with the contact of a yoke made of special test steel, ensuring maximum field concentration
• with a thickness minimum 10 mm
• with an ground touching surface
• under conditions of gap-free contact (surface-to-surface)
• during pulling in a direction vertical to the mounting surface
• at conditions approx. 20°C

Magnet lifting force in use – key factors

It is worth knowing that the magnet holding will differ influenced by the following factors, starting with the most relevant:

• Space between magnet and steel – every millimeter of separation (caused e.g. by veneer or unevenness) diminishes the magnet efficiency, often by half at just 0.5 mm.
• Angle of force application – maximum parameter is obtained only during perpendicular pulling. The force required to slide of the magnet along the surface is typically several times lower (approx. 1/5 of the lifting capacity).
• Steel thickness – too thin plate does not close the flux, causing part of the power to be wasted into the air.
• Steel type – mild steel attracts best. Alloy admixtures reduce magnetic permeability and holding force.
• Surface condition – ground elements ensure maximum contact, which increases force. Rough surfaces reduce efficiency.
• Operating temperature – NdFeB sinters have a negative temperature coefficient. When it is hot they are weaker, and at low temperatures gain strength (up to a certain limit).

* Lifting capacity was measured with the use of a smooth steel plate of suitable thickness (min. 20 mm), under perpendicular pulling force, however under shearing force the load capacity is reduced by as much as 75%. In addition, even a slight gap {between} the magnet’s surface and the plate reduces the lifting capacity.