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

Pros as well as cons of NdFeB magnets.

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

• They retain full power for almost ten years – the loss is just ~1% (in theory),
• Neodymium magnets remain extremely resistant to demagnetization caused by magnetic disturbances,
• The use of an shiny finish of noble metals (nickel, gold, silver) causes the element to present itself better,
• They feature high magnetic induction at the operating surface, making them more effective,
• Neodymium magnets are characterized by very high magnetic induction on the magnet surface and can work (depending on the shape) even at a temperature of 230°C or more...
• Considering the potential of precise shaping and customization to specialized requirements, neodymium magnets can be modeled in a variety of shapes and sizes, which amplifies use scope,
• Versatile presence in innovative solutions – they find application in magnetic memories, electromotive mechanisms, medical devices, as well as modern systems.
• Compactness – despite small sizes they provide effective action, making them ideal for precision applications

Disadvantages of NdFeB magnets:

• Brittleness is one of their disadvantages. Upon intense impact they can break. We recommend keeping them in a special holder, which not only protects them against impacts but also raises their durability
• We warn that neodymium magnets can reduce their strength at high temperatures. To prevent this, we suggest our specialized [AH] magnets, which work effectively even at 230°C.
• They rust in a humid environment - during use outdoors we recommend using waterproof magnets e.g. in rubber, plastic
• Due to limitations in producing nuts and complicated forms in magnets, we recommend using casing - magnetic mechanism.
• Potential hazard related to microscopic parts of magnets can be dangerous, if swallowed, which becomes key in the aspect of protecting the youngest. Additionally, small components of these products are able to disrupt the diagnostic process medical in case of swallowing.
• Higher cost of purchase is a significant factor to consider compared to ceramic magnets, especially in budget applications

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

The declared magnet strength represents the limit force, recorded under ideal test conditions, namely:

• on a block made of structural steel, optimally conducting the magnetic field
• whose thickness reaches at least 10 mm
• with a plane cleaned and smooth
• without the slightest insulating layer between the magnet and steel
• during pulling in a direction perpendicular to the mounting surface
• at room temperature

Practical lifting capacity: influencing factors

During everyday use, the actual holding force results from a number of factors, ranked from most significant:

• Space between magnet and steel – even a fraction of a millimeter of distance (caused e.g. by varnish or unevenness) drastically reduces the pulling force, often by half at just 0.5 mm.
• Load vector – highest force is reached only during perpendicular pulling. The resistance to sliding of the magnet along the plate is standardly many times lower (approx. 1/5 of the lifting capacity).
• Metal thickness – the thinner the sheet, the weaker the hold. Magnetic flux passes through the material instead of generating force.
• Material type – ideal substrate is high-permeability steel. Cast iron may have worse magnetic properties.
• Base smoothness – the smoother and more polished the plate, the better the adhesion and stronger the hold. Roughness creates an air distance.
• Thermal factor – high temperature weakens magnetic field. Exceeding the limit temperature can permanently damage the magnet.

* Lifting capacity testing was carried out on a smooth plate of optimal thickness, under a perpendicular pulling force, however under shearing force the holding force is lower. In addition, even a small distance {between} the magnet’s surface and the plate decreases the holding force.