BM 950x180x70 [4x M8] - magnetic beam

Strengths and weaknesses of rare earth magnets.

In addition to their magnetic efficiency, neodymium magnets provide the following advantages:

• They do not lose power, even after around 10 years – the drop in power is only ~1% (based on measurements),
• They do not lose their magnetic properties even under strong external field,
• In other words, due to the aesthetic finish of silver, the element becomes visually attractive,
• Magnetic induction on the working part of the magnet turns out to be impressive,
• 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...
• Considering the option of flexible shaping and customization to unique needs, NdFeB magnets can be modeled in a variety of shapes and sizes, which makes them more universal,
• Huge importance in modern industrial fields – they are utilized in computer drives, electromotive mechanisms, diagnostic systems, and complex engineering applications.
• Relatively small size with high pulling force – neodymium magnets offer high power in small dimensions, which allows their use in small systems

Cons of neodymium magnets and ways of using them

• To avoid cracks under impact, we suggest using special steel housings. Such a solution protects the magnet and simultaneously improves its durability.
• When exposed to high temperature, neodymium magnets experience a drop in force. Often, when the temperature exceeds 80°C, their power decreases (depending on the size and shape of the magnet). For those who need magnets for extreme conditions, we offer [AH] versions withstanding up to 230°C
• Due to the susceptibility of magnets to corrosion in a humid environment, we advise using waterproof magnets made of rubber, plastic or other material resistant to moisture, in case of application outdoors
• Due to limitations in realizing threads and complex forms in magnets, we propose using a housing - magnetic mechanism.
• Health risk to health – tiny shards of magnets can be dangerous, when accidentally swallowed, which gains importance in the context of child safety. Furthermore, small components of these devices are able to be problematic in diagnostics medical after entering the body.
• Higher cost of purchase is a significant factor to consider compared to ceramic magnets, especially in budget applications

Highest magnetic holding force – what it depends on?

The lifting capacity listed is a theoretical maximum value performed under the following configuration:

• using a sheet made of mild steel, functioning as a ideal flux conductor
• with a thickness no less than 10 mm
• with a plane free of scratches
• with direct contact (no coatings)
• for force applied at a right angle (in the magnet axis)
• in stable room temperature

Magnet lifting force in use – key factors

Effective lifting capacity is affected by specific conditions, such as (from priority):

• Distance (betwixt the magnet and the plate), as even a microscopic distance (e.g. 0.5 mm) can cause a reduction in force by up to 50% (this also applies to paint, corrosion or dirt).
• Direction of force – maximum parameter is obtained only during pulling at a 90° angle. The shear force of the magnet along the plate is typically several times smaller (approx. 1/5 of the lifting capacity).
• Plate thickness – insufficiently thick sheet causes magnetic saturation, causing part of the flux to be wasted into the air.
• Steel grade – the best choice is high-permeability steel. Stainless steels may have worse magnetic properties.
• Surface structure – the smoother and more polished the plate, the better the adhesion and higher the lifting capacity. Unevenness creates an air distance.
• Operating temperature – neodymium magnets have a negative temperature coefficient. When it is hot they lose power, and in frost they can be stronger (up to a certain limit).

* Lifting capacity testing was carried out on plates with a smooth surface of optimal thickness, under a perpendicular pulling force, however under attempts to slide the magnet the holding force is lower. Additionally, even a minimal clearance {between} the magnet and the plate reduces the load capacity.

Strengths and weaknesses of rare earth magnets.

In addition to their magnetic efficiency, neodymium magnets provide the following advantages:

• They do not lose power, even after around 10 years – the drop in power is only ~1% (based on measurements),
• They do not lose their magnetic properties even under strong external field,
• In other words, due to the aesthetic finish of silver, the element becomes visually attractive,
• Magnetic induction on the working part of the magnet turns out to be impressive,
• 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...
• Considering the option of flexible shaping and customization to unique needs, NdFeB magnets can be modeled in a variety of shapes and sizes, which makes them more universal,
• Huge importance in modern industrial fields – they are utilized in computer drives, electromotive mechanisms, diagnostic systems, and complex engineering applications.
• Relatively small size with high pulling force – neodymium magnets offer high power in small dimensions, which allows their use in small systems

Cons of neodymium magnets and ways of using them

• To avoid cracks under impact, we suggest using special steel housings. Such a solution protects the magnet and simultaneously improves its durability.
• When exposed to high temperature, neodymium magnets experience a drop in force. Often, when the temperature exceeds 80°C, their power decreases (depending on the size and shape of the magnet). For those who need magnets for extreme conditions, we offer [AH] versions withstanding up to 230°C
• Due to the susceptibility of magnets to corrosion in a humid environment, we advise using waterproof magnets made of rubber, plastic or other material resistant to moisture, in case of application outdoors
• Due to limitations in realizing threads and complex forms in magnets, we propose using a housing - magnetic mechanism.
• Health risk to health – tiny shards of magnets can be dangerous, when accidentally swallowed, which gains importance in the context of child safety. Furthermore, small components of these devices are able to be problematic in diagnostics medical after entering the body.
• Higher cost of purchase is a significant factor to consider compared to ceramic magnets, especially in budget applications

Highest magnetic holding force – what it depends on?

The lifting capacity listed is a theoretical maximum value performed under the following configuration:

• using a sheet made of mild steel, functioning as a ideal flux conductor
• with a thickness no less than 10 mm
• with a plane free of scratches
• with direct contact (no coatings)
• for force applied at a right angle (in the magnet axis)
• in stable room temperature

Magnet lifting force in use – key factors

Effective lifting capacity is affected by specific conditions, such as (from priority):

• Distance (betwixt the magnet and the plate), as even a microscopic distance (e.g. 0.5 mm) can cause a reduction in force by up to 50% (this also applies to paint, corrosion or dirt).
• Direction of force – maximum parameter is obtained only during pulling at a 90° angle. The shear force of the magnet along the plate is typically several times smaller (approx. 1/5 of the lifting capacity).
• Plate thickness – insufficiently thick sheet causes magnetic saturation, causing part of the flux to be wasted into the air.
• Steel grade – the best choice is high-permeability steel. Stainless steels may have worse magnetic properties.
• Surface structure – the smoother and more polished the plate, the better the adhesion and higher the lifting capacity. Unevenness creates an air distance.
• Operating temperature – neodymium magnets have a negative temperature coefficient. When it is hot they lose power, and in frost they can be stronger (up to a certain limit).

* Lifting capacity testing was carried out on plates with a smooth surface of optimal thickness, under a perpendicular pulling force, however under attempts to slide the magnet the holding force is lower. Additionally, even a minimal clearance {between} the magnet and the plate reduces the load capacity.