UMGGW 22x6 [M4] GW / N38 - magnetic holder rubber internal thread

Pros and cons of NdFeB magnets.

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

• They retain magnetic properties for almost 10 years – the drop is just ~1% (in theory),
• They maintain their magnetic properties even under close interference source,
• By applying a lustrous layer of gold, the element presents an nice look,
• Magnetic induction on the top side of the magnet turns out to be extremely intense,
• Neodymium magnets are characterized by extremely high magnetic induction on the magnet surface and are able to act (depending on the form) even at a temperature of 230°C or more...
• Thanks to modularity in forming and the capacity to modify to complex applications,
• Fundamental importance in high-tech industry – they are used in hard drives, brushless drives, diagnostic systems, and modern systems.
• Relatively small size with high pulling force – neodymium magnets offer impressive pulling force in tiny dimensions, which makes them useful in small systems

Drawbacks and weaknesses of neodymium magnets: tips and applications.

• Brittleness is one of their disadvantages. Upon strong impact they can break. We advise keeping them in a special holder, which not only secures them against impacts but also increases their durability
• When exposed to high temperature, neodymium magnets experience a drop in strength. Often, when the temperature exceeds 80°C, their strength 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
• Magnets exposed to a humid environment can corrode. Therefore while using outdoors, we advise using water-impermeable magnets made of rubber, plastic or other material protecting against moisture
• We suggest casing - magnetic mechanism, due to difficulties in creating nuts inside the magnet and complex forms.
• Potential hazard to health – tiny shards of magnets can be dangerous, if swallowed, which is particularly important in the aspect of protecting the youngest. Additionally, tiny parts of these devices can complicate diagnosis medical in case of swallowing.
• With large orders the cost of neodymium magnets is a challenge,

Highest magnetic holding force – what contributes to it?

The lifting capacity listed is a result of laboratory testing performed under standard conditions:

• with the contact of a yoke made of special test steel, guaranteeing maximum field concentration
• possessing a thickness of min. 10 mm to avoid saturation
• characterized by smoothness
• without any clearance between the magnet and steel
• during detachment in a direction perpendicular to the plane
• at temperature approx. 20 degrees Celsius

Practical aspects of lifting capacity – factors

Real force is affected by working environment parameters, such as (from most important):

• Air gap (betwixt the magnet and the metal), since even a tiny clearance (e.g. 0.5 mm) can cause a reduction in force by up to 50% (this also applies to paint, rust or dirt).
• Force direction – remember that the magnet holds strongest perpendicularly. Under sliding down, the capacity drops significantly, often to levels of 20-30% of the maximum value.
• Steel thickness – insufficiently thick steel causes magnetic saturation, causing part of the power to be lost to the other side.
• Material composition – not every steel reacts the same. High carbon content weaken the interaction with the magnet.
• Surface condition – smooth surfaces ensure maximum contact, which increases force. Rough surfaces reduce efficiency.
• Temperature influence – hot environment reduces magnetic field. Too high temperature can permanently demagnetize the magnet.

* Lifting capacity testing was performed on a smooth plate of optimal thickness, under perpendicular forces, whereas under shearing force the lifting capacity is smaller. Moreover, even a minimal clearance {between} the magnet and the plate reduces the lifting capacity.