UMGGW 88x8.5 [M6] GW / N38 - magnetic holder rubber internal thread

Advantages and disadvantages of NdFeB magnets.

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

• They retain magnetic properties for around ten years – the loss is just ~1% (in theory),
• Magnets perfectly defend themselves against loss of magnetization caused by ambient magnetic noise,
• In other words, due to the metallic surface of nickel, the element becomes visually attractive,
• Magnets possess very high magnetic induction on the surface,
• Thanks to resistance to high temperature, they are capable of working (depending on the form) even at temperatures up to 230°C and higher...
• Possibility of exact forming as well as modifying to defined conditions,
• Fundamental importance in modern technologies – they are utilized in data components, electric motors, diagnostic systems, and other advanced devices.
• Relatively small size with high pulling force – neodymium magnets offer impressive pulling force in small dimensions, which makes them useful in compact constructions

What to avoid - cons of neodymium magnets: tips and applications.

• To avoid cracks upon strong impacts, we suggest using special steel holders. Such a solution secures the magnet and simultaneously improves its durability.
• Neodymium magnets demagnetize when exposed to high temperatures. After reaching 80°C, many of them experience permanent weakening of power (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 suggest 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 creating nuts inside the magnet and complex forms.
• Health risk to health – tiny shards of magnets can be dangerous, when accidentally swallowed, which becomes key in the aspect of protecting the youngest. It is also worth noting that tiny parts of these products are able to complicate diagnosis medical after entering the body.
• With mass production the cost of neodymium magnets is economically unviable,

Magnetic strength at its maximum – what affects it?

The load parameter shown represents the peak performance, recorded under optimal environment, namely:

• with the application of a sheet made of low-carbon steel, ensuring maximum field concentration
• with a cross-section no less than 10 mm
• with an ground touching surface
• under conditions of no distance (surface-to-surface)
• during pulling in a direction vertical to the plane
• at ambient temperature room level

Determinants of practical lifting force of a magnet

Holding efficiency impacted by working environment parameters, mainly (from most important):

• Distance – the presence of foreign body (rust, dirt, gap) interrupts the magnetic circuit, which reduces capacity steeply (even by 50% at 0.5 mm).
• Direction of force – highest force is reached 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).
• Metal thickness – thin material does not allow full use of the magnet. Magnetic flux passes through the material instead of generating force.
• Steel type – low-carbon steel gives the best results. Alloy steels decrease magnetic properties and holding force.
• Base smoothness – the smoother and more polished the plate, the larger the contact zone and stronger the hold. Unevenness acts like micro-gaps.
• Thermal factor – hot environment reduces pulling force. Too high temperature can permanently demagnetize the magnet.

* Lifting capacity testing was conducted on a smooth plate of optimal thickness, under perpendicular forces, however under parallel forces the lifting capacity is smaller. Moreover, even a small distance {between} the magnet’s surface and the plate reduces the load capacity.