XT-6 magnetyzery do silników - BENZYNA i LPG + olej - XT-6 magnetizer

Advantages and disadvantages of rare earth magnets.

Besides their tremendous field intensity, neodymium magnets offer the following advantages:

• They retain attractive force for around 10 years – the drop is just ~1% (based on simulations),
• They show high resistance to demagnetization induced by external disturbances,
• By using a shiny layer of nickel, the element gains an nice look,
• Neodymium magnets deliver maximum magnetic induction on a their surface, which increases force concentration,
• Due to their durability and thermal resistance, neodymium magnets are capable of operate (depending on the shape) even at high temperatures reaching 230°C or more...
• Possibility of detailed modeling and modifying to atypical conditions,
• Versatile presence in electronics industry – they serve a role in data components, electric motors, precision medical tools, also technologically advanced constructions.
• Thanks to their power density, small magnets offer high operating force, with minimal size,

Cons of neodymium magnets: application proposals

• To avoid cracks upon strong impacts, we recommend using special steel housings. Such a solution secures the magnet and simultaneously increases its durability.
• Neodymium magnets lose their power 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
• When exposed to humidity, magnets usually rust. For applications outside, it is recommended to use protective magnets, such as those in rubber or plastics, which prevent oxidation as well as corrosion.
• Limited possibility of creating nuts in the magnet and complex forms - recommended is a housing - magnetic holder.
• Potential hazard related to microscopic parts of magnets can be dangerous, when accidentally swallowed, which is particularly important in the context of child safety. Furthermore, tiny parts of these devices are able to complicate diagnosis medical after entering the body.
• High unit price – neodymium magnets cost more than other types of magnets (e.g. ferrite), which can limit application in large quantities

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

Breakaway force was defined for optimal configuration, including:

• on a base made of structural steel, optimally conducting the magnetic flux
• whose thickness reaches at least 10 mm
• with an ideally smooth contact surface
• with direct contact (without paint)
• under axial force vector (90-degree angle)
• at conditions approx. 20°C

Lifting capacity in practice – influencing factors

Bear in mind that the working load will differ influenced by the following factors, starting with the most relevant:

• Gap between magnet and steel – every millimeter of separation (caused e.g. by veneer or unevenness) significantly weakens the pulling force, often by half at just 0.5 mm.
• Pull-off angle – remember that the magnet holds strongest perpendicularly. Under sliding down, the capacity drops drastically, often to levels of 20-30% of the maximum value.
• Metal thickness – thin material does not allow full use of the magnet. Magnetic flux passes through the material instead of generating force.
• Plate material – low-carbon steel gives the best results. Alloy admixtures decrease magnetic permeability and lifting capacity.
• Smoothness – ideal contact is obtained only on smooth steel. Any scratches and bumps reduce the real contact area, reducing force.
• Temperature – heating the magnet causes a temporary drop of force. It is worth remembering the maximum operating temperature for a given model.

* Holding force was measured on the plate surface of 20 mm thickness, when a perpendicular force was applied, in contrast under parallel forces the load capacity is reduced by as much as 75%. Moreover, even a slight gap {between} the magnet’s surface and the plate lowers the holding force.