XT-5 magnetyzery do silników - DIESEL + olej - XT-5 magnetizer

Pros and cons of NdFeB magnets.

Apart from their consistent holding force, neodymium magnets have these key benefits:

• They virtually do not lose strength, because even after ten years the decline in efficiency is only ~1% (based on calculations),
• They retain their magnetic properties even under external field action,
• By using a shiny layer of gold, the element has an aesthetic look,
• The surface of neodymium magnets generates a concentrated magnetic field – this is a distinguishing feature,
• Through (adequate) combination of ingredients, they can achieve high thermal resistance, allowing for operation at temperatures approaching 230°C and above...
• Possibility of custom creating and adjusting to specific applications,
• Significant place in electronics industry – they are utilized in mass storage devices, electric motors, medical devices, and complex engineering applications.
• Compactness – despite small sizes they offer powerful magnetic field, making them ideal for precision applications

Disadvantages of neodymium magnets:

• Susceptibility to cracking is one of their disadvantages. Upon intense impact they can fracture. We advise keeping them in a special holder, which not only protects them against impacts but also raises their durability
• Neodymium magnets lose their force 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 possibility of producing threads in the magnet and complicated forms - recommended is casing - magnet mounting.
• Possible danger to health – tiny shards of magnets pose a threat, when accidentally swallowed, which is particularly important in the context of child health protection. It is also worth noting that small components of these products can be problematic in diagnostics medical when they are in the body.
• With mass production the cost of neodymium magnets is a challenge,

Maximum magnetic pulling force – what it depends on?

The lifting capacity listed is a result of laboratory testing performed under standard conditions:

• on a base made of mild steel, perfectly concentrating the magnetic flux
• whose thickness reaches at least 10 mm
• with an polished touching surface
• with zero gap (without impurities)
• for force applied at a right angle (in the magnet axis)
• at ambient temperature approx. 20 degrees Celsius

Practical aspects of lifting capacity – factors

Real force is influenced by working environment parameters, including (from most important):

• 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 holds significantly lower power (often approx. 20-30% of nominal force).
• Element thickness – for full efficiency, the steel must be adequately massive. Thin sheet restricts the lifting capacity (the magnet "punches through" it).
• Chemical composition of the base – low-carbon steel attracts best. Alloy steels reduce magnetic properties and lifting capacity.
• Surface condition – smooth surfaces ensure maximum contact, which increases field saturation. Uneven metal weaken the grip.
• Thermal conditions – NdFeB sinters have a negative temperature coefficient. At higher temperatures they lose power, and at low temperatures gain strength (up to a certain limit).

* Lifting capacity was assessed with the use of a smooth steel plate of suitable thickness (min. 20 mm), under perpendicular detachment force, whereas under attempts to slide the magnet the holding force is lower. Moreover, even a small distance {between} the magnet and the plate lowers the lifting capacity.