UMGW 36x18x8 [M8] GW / N38 - magnetic holder internal thread

Advantages and disadvantages of neodymium magnets.

Besides their tremendous strength, neodymium magnets offer the following advantages:

• Their power is maintained, and after around ten years it decreases only by ~1% (according to research),
• Neodymium magnets prove to be extremely resistant to loss of magnetic properties caused by external magnetic fields,
• In other words, due to the glossy surface of nickel, the element gains a professional look,
• Magnets have exceptionally strong magnetic induction on the working surface,
• 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 the ability of precise shaping and customization to custom projects, neodymium magnets can be modeled in a variety of forms and dimensions, which increases their versatility,
• Universal use in high-tech industry – they are commonly used in data components, motor assemblies, medical equipment, also industrial machines.
• Compactness – despite small sizes they offer powerful magnetic field, making them ideal for precision applications

Drawbacks and weaknesses of neodymium magnets: application proposals

• Brittleness is one of their disadvantages. Upon intense impact they can fracture. We advise keeping them in a special holder, which not only secures them against impacts but also raises their durability
• Neodymium magnets lose power when exposed to high temperatures. After reaching 80°C, many of them experience permanent drop of strength (a factor is the shape as well as 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
• Due to the susceptibility of magnets to corrosion in a humid environment, we advise using waterproof magnets made of rubber, plastic or other material stable to moisture, in case of application outdoors
• We suggest cover - magnetic mechanism, due to difficulties in producing nuts inside the magnet and complex shapes.
• Potential hazard resulting from small fragments of magnets are risky, when accidentally swallowed, which is particularly important in the aspect of protecting the youngest. Furthermore, small elements of these products are able to be problematic in diagnostics medical after entering the body.
• With mass production the cost of neodymium magnets is economically unviable,

Optimal lifting capacity of a neodymium magnet – what affects it?

The lifting capacity listed is a theoretical maximum value executed under specific, ideal conditions:

• using a plate made of low-carbon steel, functioning as a circuit closing element
• whose thickness is min. 10 mm
• characterized by lack of roughness
• without the slightest air gap between the magnet and steel
• during pulling in a direction perpendicular to the plane
• in stable room temperature

Determinants of practical lifting force of a magnet

Holding efficiency impacted by specific conditions, mainly (from priority):

• Air gap (between the magnet and the metal), since even a very small distance (e.g. 0.5 mm) leads to a decrease in lifting capacity by up to 50% (this also applies to varnish, corrosion or debris).
• Angle of force application – maximum parameter is obtained only during perpendicular pulling. The resistance to sliding of the magnet along the surface is usually many times smaller (approx. 1/5 of the lifting capacity).
• Wall thickness – the thinner the sheet, the weaker the hold. Part of the magnetic field passes through the material instead of generating force.
• Material composition – different alloys attracts identically. Alloy additives weaken the interaction with the magnet.
• Surface finish – full contact is possible only on polished steel. Any scratches and bumps reduce the real contact area, reducing force.
• Thermal factor – hot environment reduces magnetic field. Exceeding the limit temperature can permanently demagnetize the magnet.

* Lifting capacity was assessed using a smooth steel plate of optimal thickness (min. 20 mm), under perpendicular pulling force, however under parallel forces the lifting capacity is smaller. Additionally, even a small distance {between} the magnet’s surface and the plate decreases the load capacity.