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

Strengths as well as weaknesses of NdFeB magnets.

In addition to their pulling strength, neodymium magnets provide the following advantages:

• They retain attractive force for nearly 10 years – the loss is just ~1% (based on simulations),
• Neodymium magnets prove to be highly resistant to loss of magnetic properties caused by external interference,
• A magnet with a smooth silver surface is more attractive,
• Neodymium magnets deliver maximum magnetic induction on a small area, which allows for strong attraction,
• Through (appropriate) combination of ingredients, they can achieve high thermal resistance, enabling action at temperatures reaching 230°C and above...
• Thanks to the option of free molding and customization to unique requirements, NdFeB magnets can be manufactured in a variety of shapes and sizes, which amplifies use scope,
• Significant place in future technologies – they are commonly used in HDD drives, brushless drives, medical devices, also technologically advanced constructions.
• Compactness – despite small sizes they generate large force, making them ideal for precision applications

Drawbacks and weaknesses of neodymium magnets: tips and applications.

• They are prone to damage upon too strong impacts. To avoid cracks, it is worth securing magnets in a protective case. Such protection not only protects the magnet but also improves its resistance to damage
• Neodymium magnets decrease their strength under the influence of heating. As soon as 80°C is exceeded, many of them start losing their force. Therefore, we recommend our special magnets marked [AH], which maintain stability even at temperatures up to 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 those in rubber or plastics, which secure oxidation and corrosion.
• Due to limitations in creating threads and complicated forms in magnets, we recommend using cover - magnetic holder.
• Health risk related to microscopic parts of magnets pose a threat, in case of ingestion, which is particularly important in the context of child safety. Furthermore, small components of these magnets are able to be problematic in diagnostics medical in case of swallowing.
• Due to expensive raw materials, their price is relatively high,

Highest magnetic holding force – what contributes to it?

The lifting capacity listed is a result of laboratory testing executed under the following configuration:

• with the application of a yoke made of low-carbon steel, guaranteeing maximum field concentration
• whose thickness equals approx. 10 mm
• with an ground contact surface
• with direct contact (without impurities)
• during pulling in a direction perpendicular to the mounting surface
• at conditions approx. 20°C

What influences lifting capacity in practice

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

• Space between surfaces – every millimeter of distance (caused e.g. by veneer or unevenness) drastically reduces the magnet efficiency, often by half at just 0.5 mm.
• Angle of force application – maximum parameter is reached only during pulling at a 90° angle. The shear force of the magnet along the plate is standardly many times lower (approx. 1/5 of the lifting capacity).
• Metal thickness – the thinner the sheet, the weaker the hold. Part of the magnetic field penetrates through instead of generating force.
• Material type – ideal substrate is high-permeability steel. Stainless steels may generate lower lifting capacity.
• Base smoothness – the smoother and more polished the plate, the better the adhesion and higher the lifting capacity. Roughness creates an air distance.
• Thermal conditions – neodymium magnets 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 was assessed by applying a polished steel plate of suitable thickness (min. 20 mm), under perpendicular pulling force, whereas under attempts to slide the magnet the load capacity is reduced by as much as 5 times. Additionally, even a small distance {between} the magnet’s surface and the plate decreases the holding force.