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

Strengths and weaknesses of NdFeB magnets.

Besides their high retention, neodymium magnets are valued for these benefits:

• They virtually do not lose strength, because even after 10 years the performance loss is only ~1% (according to literature),
• They maintain their magnetic properties even under strong external field,
• The use of an refined layer of noble metals (nickel, gold, silver) causes the element to have aesthetics,
• Magnetic induction on the working part of the magnet turns out to be extremely intense,
• Neodymium magnets are characterized by very high magnetic induction on the magnet surface and can work (depending on the form) even at a temperature of 230°C or more...
• Considering the option of flexible shaping and adaptation to specialized needs, magnetic components can be modeled in a wide range of geometric configurations, which increases their versatility,
• Wide application in modern technologies – they are commonly used in magnetic memories, motor assemblies, medical equipment, as well as multitasking production systems.
• Relatively small size with high pulling force – neodymium magnets offer impressive pulling force in tiny dimensions, which enables their usage in compact constructions

Disadvantages of neodymium magnets:

• They are prone to damage upon heavy impacts. To avoid cracks, it is worth securing magnets in a protective case. Such protection not only protects the magnet but also increases its resistance to damage
• Neodymium magnets demagnetize when exposed to high temperatures. After reaching 80°C, many of them experience permanent weakening of strength (a factor is the shape and dimensions of the magnet). We offer magnets specially adapted to work at temperatures up to 230°C marked [AH], which are very resistant to heat
• Magnets exposed to a humid environment can rust. Therefore during using outdoors, we recommend using waterproof magnets made of rubber, plastic or other material protecting against moisture
• Limited ability of making threads in the magnet and complicated shapes - recommended is cover - magnetic holder.
• Possible danger resulting from small fragments of magnets can be dangerous, when accidentally swallowed, which becomes key in the aspect of protecting the youngest. It is also worth noting that tiny parts of these products are able to be problematic in diagnostics medical after entering the body.
• Due to neodymium price, their price is relatively high,

Best holding force of the magnet in ideal parameters – what affects it?

Breakaway force was determined for the most favorable conditions, including:

• with the application of a yoke made of low-carbon steel, guaranteeing full magnetic saturation
• possessing a massiveness of min. 10 mm to avoid saturation
• characterized by smoothness
• under conditions of ideal adhesion (surface-to-surface)
• for force applied at a right angle (in the magnet axis)
• in neutral thermal conditions

Key elements affecting lifting force

In practice, the real power depends on many variables, ranked from crucial:

• Space between surfaces – every millimeter of separation (caused e.g. by varnish or unevenness) diminishes the magnet efficiency, often by half at just 0.5 mm.
• Load vector – highest force is available only during pulling at a 90° angle. The force required to slide of the magnet along the surface is standardly several times lower (approx. 1/5 of the lifting capacity).
• Substrate thickness – for full efficiency, the steel must be adequately massive. Paper-thin metal limits the lifting capacity (the magnet "punches through" it).
• Material composition – not every steel attracts identically. High carbon content worsen the interaction with the magnet.
• Surface structure – the smoother and more polished the plate, the better the adhesion and stronger the hold. Roughness creates an air distance.
• Thermal conditions – 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 determined by applying a smooth steel plate of optimal thickness (min. 20 mm), under perpendicular pulling force, however under parallel forces the holding force is lower. In addition, even a minimal clearance {between} the magnet’s surface and the plate lowers the lifting capacity.