NCM 10x13.5x5 / N38 - channel magnetic holder

Advantages as well as disadvantages of NdFeB magnets.

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

• They do not lose power, even over nearly ten years – the drop in strength is only ~1% (according to tests),
• They maintain their magnetic properties even under strong external field,
• A magnet with a metallic silver surface has an effective appearance,
• Magnetic induction on the working layer of the magnet turns out to be exceptional,
• Through (appropriate) combination of ingredients, they can achieve high thermal resistance, enabling operation at temperatures reaching 230°C and above...
• Thanks to flexibility in constructing and the ability to modify to individual projects,
• Fundamental importance in modern technologies – they are utilized in hard drives, electric drive systems, medical equipment, also other advanced devices.
• Thanks to their power density, small magnets offer high operating force, occupying minimum space,

Cons of neodymium magnets: weaknesses and usage proposals

• They are prone to damage upon heavy impacts. To avoid cracks, it is worth protecting magnets in special housings. Such protection not only protects the magnet but also increases its resistance to damage
• We warn that neodymium magnets can lose their power at high temperatures. To prevent this, we recommend our specialized [AH] magnets, which work effectively even at 230°C.
• They oxidize in a humid environment. For use outdoors we recommend using waterproof magnets e.g. in rubber, plastic
• Due to limitations in producing threads and complex forms in magnets, we recommend using cover - magnetic holder.
• Health risk to health – tiny shards of magnets can be dangerous, in case of ingestion, which is particularly important in the context of child health protection. It is also worth noting that small elements of these magnets are able to be problematic in diagnostics medical after entering the body.
• High unit price – neodymium magnets have a higher price than other types of magnets (e.g. ferrite), which hinders application in large quantities

Detachment force of the magnet in optimal conditions – what affects it?

The load parameter shown concerns the limit force, measured under laboratory conditions, meaning:

• using a sheet made of low-carbon steel, acting as a ideal flux conductor
• whose transverse dimension reaches at least 10 mm
• with an polished contact surface
• under conditions of gap-free contact (surface-to-surface)
• during detachment in a direction vertical to the mounting surface
• at room temperature

Practical lifting capacity: influencing factors

During everyday use, the actual holding force is determined by a number of factors, presented from most significant:

• Distance – existence of foreign body (rust, tape, air) interrupts the magnetic circuit, which lowers power rapidly (even by 50% at 0.5 mm).
• Load vector – maximum parameter is obtained only during perpendicular pulling. The resistance to sliding of the magnet along the surface is typically several times lower (approx. 1/5 of the lifting capacity).
• Wall thickness – thin material does not allow full use of the magnet. Magnetic flux passes through the material instead of converting into lifting capacity.
• Plate material – low-carbon steel gives the best results. Alloy steels reduce magnetic permeability and holding force.
• Surface condition – ground elements ensure maximum contact, which improves field saturation. Uneven metal weaken the grip.
• Thermal conditions – neodymium magnets have a sensitivity to temperature. At higher temperatures they are weaker, and in frost they can be stronger (up to a certain limit).

* Lifting capacity testing was conducted on plates with a smooth surface of optimal thickness, under a perpendicular pulling force, in contrast under shearing force the lifting capacity is smaller. Additionally, even a minimal clearance {between} the magnet’s surface and the plate decreases the lifting capacity.

Advantages as well as disadvantages of NdFeB magnets.

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

• They do not lose power, even over nearly ten years – the drop in strength is only ~1% (according to tests),
• They maintain their magnetic properties even under strong external field,
• A magnet with a metallic silver surface has an effective appearance,
• Magnetic induction on the working layer of the magnet turns out to be exceptional,
• Through (appropriate) combination of ingredients, they can achieve high thermal resistance, enabling operation at temperatures reaching 230°C and above...
• Thanks to flexibility in constructing and the ability to modify to individual projects,
• Fundamental importance in modern technologies – they are utilized in hard drives, electric drive systems, medical equipment, also other advanced devices.
• Thanks to their power density, small magnets offer high operating force, occupying minimum space,

Cons of neodymium magnets: weaknesses and usage proposals

• They are prone to damage upon heavy impacts. To avoid cracks, it is worth protecting magnets in special housings. Such protection not only protects the magnet but also increases its resistance to damage
• We warn that neodymium magnets can lose their power at high temperatures. To prevent this, we recommend our specialized [AH] magnets, which work effectively even at 230°C.
• They oxidize in a humid environment. For use outdoors we recommend using waterproof magnets e.g. in rubber, plastic
• Due to limitations in producing threads and complex forms in magnets, we recommend using cover - magnetic holder.
• Health risk to health – tiny shards of magnets can be dangerous, in case of ingestion, which is particularly important in the context of child health protection. It is also worth noting that small elements of these magnets are able to be problematic in diagnostics medical after entering the body.
• High unit price – neodymium magnets have a higher price than other types of magnets (e.g. ferrite), which hinders application in large quantities

Detachment force of the magnet in optimal conditions – what affects it?

The load parameter shown concerns the limit force, measured under laboratory conditions, meaning:

• using a sheet made of low-carbon steel, acting as a ideal flux conductor
• whose transverse dimension reaches at least 10 mm
• with an polished contact surface
• under conditions of gap-free contact (surface-to-surface)
• during detachment in a direction vertical to the mounting surface
• at room temperature

Practical lifting capacity: influencing factors

During everyday use, the actual holding force is determined by a number of factors, presented from most significant:

• Distance – existence of foreign body (rust, tape, air) interrupts the magnetic circuit, which lowers power rapidly (even by 50% at 0.5 mm).
• Load vector – maximum parameter is obtained only during perpendicular pulling. The resistance to sliding of the magnet along the surface is typically several times lower (approx. 1/5 of the lifting capacity).
• Wall thickness – thin material does not allow full use of the magnet. Magnetic flux passes through the material instead of converting into lifting capacity.
• Plate material – low-carbon steel gives the best results. Alloy steels reduce magnetic permeability and holding force.
• Surface condition – ground elements ensure maximum contact, which improves field saturation. Uneven metal weaken the grip.
• Thermal conditions – neodymium magnets have a sensitivity to temperature. At higher temperatures they are weaker, and in frost they can be stronger (up to a certain limit).

* Lifting capacity testing was conducted on plates with a smooth surface of optimal thickness, under a perpendicular pulling force, in contrast under shearing force the lifting capacity is smaller. Additionally, even a minimal clearance {between} the magnet’s surface and the plate decreases the lifting capacity.