UMGZ 36x18x8 [M6] GZ / N38 - magnetic holder external thread

Advantages as well as disadvantages of neodymium magnets.

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

• Their power is durable, and after approximately ten years it decreases only by ~1% (according to research),
• Magnets effectively resist against loss of magnetization caused by external fields,
• The use of an aesthetic finish of noble metals (nickel, gold, silver) causes the element to look better,
• They show high magnetic induction at the operating surface, making them more effective,
• Through (adequate) combination of ingredients, they can achieve high thermal strength, allowing for action at temperatures reaching 230°C and above...
• Thanks to modularity in shaping and the ability to modify to client solutions,
• Wide application in advanced technology sectors – they serve a role in HDD drives, drive modules, medical equipment, and other advanced devices.
• Relatively small size with high pulling force – neodymium magnets offer strong magnetic field in small dimensions, which allows their use in miniature devices

Disadvantages of NdFeB magnets:

• To avoid cracks under impact, we recommend using special steel housings. Such a solution protects the magnet and simultaneously improves its durability.
• We warn that neodymium magnets can reduce their power at high temperatures. To prevent this, we advise our specialized [AH] magnets, which work effectively even at 230°C.
• They rust in a humid environment. For use outdoors we advise using waterproof magnets e.g. in rubber, plastic
• Limited ability of making threads in the magnet and complex forms - recommended is cover - mounting mechanism.
• Possible danger resulting from small fragments of magnets pose a threat, if swallowed, which is particularly important in the aspect of protecting the youngest. Additionally, small elements of these devices are able to disrupt the diagnostic process medical when they are in the body.
• With mass production the cost of neodymium magnets can be a barrier,

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

Magnet power was determined for optimal configuration, including:

• with the use of a yoke made of low-carbon steel, ensuring maximum field concentration
• whose thickness reaches at least 10 mm
• with an ground touching surface
• under conditions of gap-free contact (metal-to-metal)
• during pulling in a direction vertical to the plane
• at ambient temperature room level

Lifting capacity in practice – influencing factors

Please note that the working load will differ depending on elements below, in order of importance:

• Gap (betwixt the magnet and the metal), since even a microscopic distance (e.g. 0.5 mm) can cause a drastic drop in force by up to 50% (this also applies to paint, corrosion or debris).
• Force direction – catalog parameter refers to pulling vertically. When slipping, the magnet holds much less (often approx. 20-30% of maximum force).
• Wall thickness – the thinner the sheet, the weaker the hold. Magnetic flux passes through the material instead of converting into lifting capacity.
• Metal type – different alloys reacts the same. High carbon content worsen the interaction with the magnet.
• Plate texture – smooth surfaces guarantee perfect abutment, which improves field saturation. Uneven metal weaken the grip.
• Thermal environment – heating the magnet results in weakening of induction. Check the maximum operating temperature for a given model.

* Lifting capacity testing was carried out on a smooth plate of optimal thickness, under a perpendicular pulling force, in contrast under parallel forces the lifting capacity is smaller. Moreover, even a small distance {between} the magnet’s surface and the plate reduces the lifting capacity.