FM Ruszt magnetyczny do leja fi 200 jednopoziomowy / N52 - magnetic filter

Strengths and weaknesses of NdFeB magnets.

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

• They have unchanged lifting capacity, and over nearly 10 years their attraction force decreases symbolically – ~1% (in testing),
• They feature excellent resistance to magnetic field loss due to external fields,
• In other words, due to the smooth finish of silver, the element is aesthetically pleasing,
• Magnetic induction on the working layer of the magnet remains exceptional,
• Made from properly selected components, these magnets show impressive resistance to high heat, enabling them to function (depending on their form) at temperatures up to 230°C and above...
• Thanks to flexibility in forming and the capacity to modify to specific needs,
• Key role in innovative solutions – they serve a role in data components, electric drive systems, medical devices, as well as other advanced devices.
• Compactness – despite small sizes they offer powerful magnetic field, making them ideal for precision applications

Characteristics of disadvantages of neodymium magnets: weaknesses and usage proposals

• Brittleness is one of their disadvantages. Upon strong impact they can fracture. We recommend keeping them in a special holder, which not only secures them against impacts but also raises their durability
• When exposed to high temperature, neodymium magnets experience a drop in power. Often, when the temperature exceeds 80°C, their power decreases (depending on the size, as well as shape of the magnet). For those who need magnets for extreme conditions, we offer [AH] versions withstanding up to 230°C
• Magnets exposed to a humid environment can corrode. Therefore when using outdoors, we recommend using waterproof magnets made of rubber, plastic or other material protecting against moisture
• Due to limitations in realizing nuts and complex forms in magnets, we recommend using a housing - magnetic mechanism.
• Potential hazard resulting from small fragments of magnets can be dangerous, when accidentally swallowed, which is particularly important in the context of child safety. It is also worth noting that small elements of these magnets can be problematic in diagnostics medical after entering the body.
• Due to expensive raw materials, their price is higher than average,

Highest magnetic holding force – what it depends on?

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

• using a plate made of high-permeability steel, functioning as a magnetic yoke
• whose thickness reaches at least 10 mm
• characterized by even structure
• with direct contact (no coatings)
• for force applied at a right angle (in the magnet axis)
• at standard ambient temperature

Lifting capacity in practice – influencing factors

During everyday use, the real power depends on many variables, listed from crucial:

• Gap between magnet and steel – even a fraction of a millimeter of separation (caused e.g. by veneer or dirt) drastically reduces the pulling force, 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 plate is usually several times smaller (approx. 1/5 of the lifting capacity).
• Metal thickness – the thinner the sheet, the weaker the hold. Part of the magnetic field passes through the material instead of converting into lifting capacity.
• Steel grade – ideal substrate is high-permeability steel. Hardened steels may generate lower lifting capacity.
• Surface structure – the smoother and more polished the plate, the larger the contact zone and higher the lifting capacity. Unevenness creates an air distance.
• Heat – NdFeB sinters have a sensitivity to temperature. When it is hot they lose power, and in frost they can be stronger (up to a certain limit).

* Lifting capacity testing was performed on plates with a smooth surface of suitable thickness, under perpendicular forces, however under parallel forces the load capacity is reduced by as much as 5 times. In addition, even a minimal clearance {between} the magnet and the plate lowers the holding force.