UMGB 75x28 [M10x3] GW F200 PLATINIUM + Lina GOBLIN / N52 - goblin magnetic holder

Pros and cons of NdFeB magnets.

Apart from their consistent holding force, neodymium magnets have these key benefits:

• They have stable power, and over nearly 10 years their performance decreases symbolically – ~1% (in testing),
• They feature excellent resistance to magnetism drop when exposed to external magnetic sources,
• A magnet with a smooth gold surface looks better,
• Magnetic induction on the working part of the magnet is strong,
• Neodymium magnets are characterized by extremely high magnetic induction on the magnet surface and can work (depending on the form) even at a temperature of 230°C or more...
• Possibility of individual creating as well as modifying to complex conditions,
• Wide application in modern industrial fields – they serve a role in computer drives, electric motors, advanced medical instruments, also complex engineering applications.
• Compactness – despite small sizes they offer powerful magnetic field, making them ideal for precision applications

Disadvantages of neodymium magnets:

• At very strong impacts they can break, therefore we recommend placing them in steel cases. A metal housing provides additional protection against damage, as well as increases the magnet's durability.
• When exposed to high temperature, neodymium magnets suffer 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 suggest using waterproof magnets made of rubber, plastic or other material stable to moisture, in case of application outdoors
• Limited possibility of producing threads in the magnet and complicated shapes - preferred is cover - magnet mounting.
• Health risk to health – tiny shards of magnets pose a threat, in case of ingestion, which is particularly important in the context of child safety. Additionally, small elements of these devices are able to complicate diagnosis medical in case of swallowing.
• Higher cost of purchase is one of the disadvantages compared to ceramic magnets, especially in budget applications

Maximum lifting force for a neodymium magnet – what affects it?

The specified lifting capacity represents the limit force, obtained under optimal environment, meaning:

• on a plate made of mild steel, perfectly concentrating the magnetic flux
• whose thickness equals approx. 10 mm
• with an ground touching surface
• with total lack of distance (no impurities)
• under perpendicular application of breakaway force (90-degree angle)
• at room temperature

Lifting capacity in real conditions – factors

Real force impacted by specific conditions, such as (from priority):

• Clearance – the presence of any layer (paint, tape, air) acts as an insulator, which reduces power rapidly (even by 50% at 0.5 mm).
• Force direction – declared lifting capacity refers to pulling vertically. When attempting to slide, the magnet holds much less (often approx. 20-30% of nominal force).
• Metal thickness – thin material does not allow full use of the magnet. Magnetic flux passes through the material instead of converting into lifting capacity.
• Material type – ideal substrate is high-permeability steel. Stainless steels may have worse magnetic properties.
• Surface condition – smooth surfaces guarantee perfect abutment, which increases field saturation. Uneven metal weaken the grip.
• Temperature – heating the magnet causes a temporary drop of induction. It is worth remembering the thermal limit for a given model.

* Holding force was checked on a smooth steel plate of 20 mm thickness, when the force acted perpendicularly, whereas under parallel forces the holding force is lower. Additionally, even a small distance {between} the magnet and the plate reduces the load capacity.