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

Pros as well as cons of neodymium magnets.

Besides their immense strength, neodymium magnets offer the following advantages:

• They virtually do not lose power, because even after ten years the performance loss is only ~1% (in laboratory conditions),
• They are extremely resistant to demagnetization induced by external disturbances,
• The use of an metallic finish of noble metals (nickel, gold, silver) causes the element to be more visually attractive,
• The surface of neodymium magnets generates a strong magnetic field – this is one of their assets,
• Made from properly selected components, these magnets show impressive resistance to high heat, enabling them to function (depending on their form) at temperatures up to 230°C and above...
• Possibility of exact shaping and modifying to atypical conditions,
• Universal use in modern technologies – they are commonly used in mass storage devices, electric drive systems, medical devices, also modern systems.
• Relatively small size with high pulling force – neodymium magnets offer impressive pulling force in small dimensions, which makes them useful in miniature devices

Disadvantages of neodymium magnets:

• At very strong impacts they can crack, therefore we advise placing them in strong housings. A metal housing provides additional protection against damage, as well as increases the magnet's durability.
• We warn that neodymium magnets can lose their strength at high temperatures. To prevent this, we suggest our specialized [AH] magnets, which work effectively even at 230°C.
• They oxidize in a humid environment - during use outdoors we recommend using waterproof magnets e.g. in rubber, plastic
• We suggest a housing - magnetic mount, due to difficulties in realizing threads inside the magnet and complex forms.
• Health risk to health – tiny shards of magnets are risky, in case of ingestion, which is particularly important in the aspect of protecting the youngest. It is also worth noting that small elements of these devices are able to disrupt the diagnostic process medical after entering the body.
• Higher cost of purchase is a significant factor to consider compared to ceramic magnets, especially in budget applications

Maximum lifting capacity of the magnet – what contributes to it?

The declared magnet strength concerns the maximum value, obtained under optimal environment, namely:

• on a base made of structural steel, effectively closing the magnetic field
• with a cross-section minimum 10 mm
• with a surface perfectly flat
• without any clearance between the magnet and steel
• for force acting at a right angle (in the magnet axis)
• at ambient temperature room level

Magnet lifting force in use – key factors

During everyday use, the actual holding force is determined by a number of factors, presented from the most important:

• Gap between surfaces – every millimeter of distance (caused e.g. by varnish or dirt) drastically reduces the magnet efficiency, often by half at just 0.5 mm.
• Loading method – declared lifting capacity refers to detachment vertically. When slipping, the magnet holds significantly lower power (often approx. 20-30% of nominal force).
• Substrate thickness – to utilize 100% power, the steel must be sufficiently thick. Thin sheet restricts the attraction force (the magnet "punches through" it).
• Material type – the best choice is high-permeability steel. Hardened steels may attract less.
• Surface quality – the more even the surface, the larger the contact zone and stronger the hold. Roughness creates an air distance.
• Thermal environment – heating the magnet results in weakening of induction. It is worth remembering the thermal limit for a given model.

* Lifting capacity testing was performed on plates with a smooth surface of suitable thickness, under perpendicular forces, whereas under shearing force the load capacity is reduced by as much as 5 times. Additionally, even a small distance {between} the magnet’s surface and the plate reduces the lifting capacity.

Pros as well as cons of neodymium magnets.

Besides their immense strength, neodymium magnets offer the following advantages:

• They virtually do not lose power, because even after ten years the performance loss is only ~1% (in laboratory conditions),
• They are extremely resistant to demagnetization induced by external disturbances,
• The use of an metallic finish of noble metals (nickel, gold, silver) causes the element to be more visually attractive,
• The surface of neodymium magnets generates a strong magnetic field – this is one of their assets,
• Made from properly selected components, these magnets show impressive resistance to high heat, enabling them to function (depending on their form) at temperatures up to 230°C and above...
• Possibility of exact shaping and modifying to atypical conditions,
• Universal use in modern technologies – they are commonly used in mass storage devices, electric drive systems, medical devices, also modern systems.
• Relatively small size with high pulling force – neodymium magnets offer impressive pulling force in small dimensions, which makes them useful in miniature devices

Disadvantages of neodymium magnets:

• At very strong impacts they can crack, therefore we advise placing them in strong housings. A metal housing provides additional protection against damage, as well as increases the magnet's durability.
• We warn that neodymium magnets can lose their strength at high temperatures. To prevent this, we suggest our specialized [AH] magnets, which work effectively even at 230°C.
• They oxidize in a humid environment - during use outdoors we recommend using waterproof magnets e.g. in rubber, plastic
• We suggest a housing - magnetic mount, due to difficulties in realizing threads inside the magnet and complex forms.
• Health risk to health – tiny shards of magnets are risky, in case of ingestion, which is particularly important in the aspect of protecting the youngest. It is also worth noting that small elements of these devices are able to disrupt the diagnostic process medical after entering the body.
• Higher cost of purchase is a significant factor to consider compared to ceramic magnets, especially in budget applications

Maximum lifting capacity of the magnet – what contributes to it?

The declared magnet strength concerns the maximum value, obtained under optimal environment, namely:

• on a base made of structural steel, effectively closing the magnetic field
• with a cross-section minimum 10 mm
• with a surface perfectly flat
• without any clearance between the magnet and steel
• for force acting at a right angle (in the magnet axis)
• at ambient temperature room level

Magnet lifting force in use – key factors

During everyday use, the actual holding force is determined by a number of factors, presented from the most important:

• Gap between surfaces – every millimeter of distance (caused e.g. by varnish or dirt) drastically reduces the magnet efficiency, often by half at just 0.5 mm.
• Loading method – declared lifting capacity refers to detachment vertically. When slipping, the magnet holds significantly lower power (often approx. 20-30% of nominal force).
• Substrate thickness – to utilize 100% power, the steel must be sufficiently thick. Thin sheet restricts the attraction force (the magnet "punches through" it).
• Material type – the best choice is high-permeability steel. Hardened steels may attract less.
• Surface quality – the more even the surface, the larger the contact zone and stronger the hold. Roughness creates an air distance.
• Thermal environment – heating the magnet results in weakening of induction. It is worth remembering the thermal limit for a given model.

* Lifting capacity testing was performed on plates with a smooth surface of suitable thickness, under perpendicular forces, whereas under shearing force the load capacity is reduced by as much as 5 times. Additionally, even a small distance {between} the magnet’s surface and the plate reduces the lifting capacity.