UMGZ 48x24x11.5 [M8] GZ / N38 - magnetic holder external thread

Strengths and weaknesses of neodymium magnets.

Besides their high retention, neodymium magnets are valued for these benefits:

• They virtually do not lose power, because even after 10 years the performance loss is only ~1% (in laboratory conditions),
• Neodymium magnets are characterized by remarkably resistant to demagnetization caused by magnetic disturbances,
• In other words, due to the smooth finish of silver, the element gains a professional look,
• Magnets exhibit extremely high magnetic induction on the active area,
• Through (adequate) combination of ingredients, they can achieve high thermal resistance, allowing for functioning at temperatures approaching 230°C and above...
• Thanks to freedom in designing and the capacity to customize to unusual requirements,
• Versatile presence in modern industrial fields – they are used in data components, motor assemblies, advanced medical instruments, and multitasking production systems.
• Relatively small size with high pulling force – neodymium magnets offer high power in small dimensions, which makes them useful in small systems

What to avoid - cons of neodymium magnets: application proposals

• To avoid cracks under impact, we suggest using special steel holders. Such a solution protects the magnet and simultaneously improves its durability.
• We warn that neodymium magnets can reduce their strength at high temperatures. To prevent this, we recommend our specialized [AH] magnets, which work effectively even at 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 immune to moisture, when using outdoors
• We suggest casing - magnetic mount, due to difficulties in realizing threads inside the magnet and complicated forms.
• Health risk resulting from small fragments of magnets are risky, when accidentally swallowed, which is particularly important in the context of child health protection. Furthermore, small elements of these products are able to disrupt the diagnostic process medical in case of swallowing.
• Due to neodymium price, their price is higher than average,

Optimal lifting capacity of a neodymium magnet – what contributes to it?

The specified lifting capacity refers to the limit force, recorded under ideal test conditions, namely:

• with the contact of a yoke made of low-carbon steel, guaranteeing full magnetic saturation
• whose thickness reaches at least 10 mm
• characterized by smoothness
• without any insulating layer between the magnet and steel
• for force applied at a right angle (in the magnet axis)
• at conditions approx. 20°C

Magnet lifting force in use – key factors

Please note that the magnet holding may be lower influenced by the following factors, in order of importance:

• Air gap (between the magnet and the plate), since even a microscopic clearance (e.g. 0.5 mm) results in a decrease in lifting capacity by up to 50% (this also applies to varnish, corrosion or dirt).
• Force direction – remember that the magnet has greatest strength perpendicularly. Under shear forces, the capacity drops significantly, often to levels of 20-30% of the nominal value.
• Element thickness – for full efficiency, the steel must be sufficiently thick. Thin sheet restricts the lifting capacity (the magnet "punches through" it).
• Plate material – mild steel gives the best results. Alloy steels reduce magnetic permeability and lifting capacity.
• Plate texture – smooth surfaces guarantee perfect abutment, which increases force. Uneven metal weaken the grip.
• Temperature influence – high temperature reduces magnetic field. Exceeding the limit temperature can permanently damage the magnet.

* Lifting capacity testing was conducted on a smooth plate of optimal thickness, under perpendicular forces, however under shearing force the load capacity is reduced by as much as 75%. Moreover, even a slight gap {between} the magnet and the plate reduces the load capacity.