SM 25x125 [2xM8] / N42 - magnetic separator
magnetic separator
Catalog no 130288
GTIN: 5906301812814
Diameter Ø [±0,1 mm]
25 mm
Height [±0,1 mm]
125 mm
Weight
0.01 g
319.80 ZŁ with VAT / pcs + price for transport
260.00 ZŁ net + 23% VAT / pcs
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SM 25x125 [2xM8] / N42 - magnetic separator
Magnetic properties of material N42
Physical properties of NdFeB
Shopping tips
Advantages as well as disadvantages of neodymium magnets NdFeB.
In addition to their pulling strength, neodymium magnets provide the following advantages:
- They virtually do not lose strength, because even after ten years, the performance loss is only ~1% (based on calculations),
- They protect against demagnetization induced by ambient electromagnetic environments very well,
- The use of a decorative gold surface provides a eye-catching finish,
- The outer field strength of the magnet shows advanced magnetic properties,
- With the right combination of compounds, they reach significant thermal stability, enabling operation at or above 230°C (depending on the form),
- The ability for custom shaping as well as customization to individual needs – neodymium magnets can be manufactured in a wide range of shapes and sizes, which amplifies their functionality across industries,
- Significant impact in new technology industries – they are used in data storage devices, rotating machines, diagnostic apparatus along with other advanced devices,
- Thanks to their concentrated strength, small magnets offer high magnetic performance, while occupying minimal space,
Disadvantages of rare earth magnets:
- They are prone to breaking when subjected to a powerful impact. If the magnets are exposed to shocks, we recommend in a steel housing. The steel housing, in the form of a holder, protects the magnet from fracture , and at the same time strengthens its overall durability,
- They lose strength at extreme temperatures. Most neodymium magnets experience permanent decline in strength when heated above 80°C (depending on the dimensions and height). However, we offer special variants with high temperature resistance that can operate up to 230°C or higher,
- Due to corrosion risk in humid conditions, it is wise to use sealed magnets made of plastic for outdoor use,
- Using a cover – such as a magnetic holder – is advised due to the difficulty in manufacturing holes directly in the magnet,
- Potential hazard related to magnet particles may arise, when consumed by mistake, which is important in the family environments. Furthermore, minuscule fragments from these assemblies can complicate medical imaging once in the system,
- High unit cost – neodymium magnets are more expensive than other types of magnets (e.g., ferrite), which can restrict large-scale applications
Maximum lifting capacity of the magnet – what it depends on?
The given pulling force of the magnet represents the maximum force, determined under optimal conditions, specifically:
- using a steel plate with low carbon content, acting as a magnetic circuit closure
- having a thickness of no less than 10 millimeters
- with a smooth surface
- with no separation
- in a perpendicular direction of force
- under standard ambient temperature
Practical aspects of lifting capacity – factors
The lifting capacity of a magnet is determined by in practice key elements, according to their importance:
- Air gap between the magnet and the plate, because even a very small distance (e.g. 0.5 mm) can cause a drop in lifting force of up to 50%.
- Direction of applied force, because the maximum lifting capacity is achieved under perpendicular application. The force required to slide the magnet along the plate is usually several times lower.
- Thickness of the plate, as a plate that is too thin causes part of the magnetic flux not to be used and to remain wasted in the air.
- Material of the plate, because higher carbon content lowers holding force, while higher iron content increases it. The best choice is steel with high magnetic permeability and high saturation induction.
- Surface of the plate, because the more smooth and polished it is, the better the contact and consequently the greater the magnetic saturation.
- Operating temperature, since all permanent magnets have a negative temperature coefficient. This means that at high temperatures they are weaker, while at sub-zero temperatures they become slightly stronger.
* Lifting capacity testing was carried out on a smooth plate of suitable thickness, under perpendicular forces, in contrast under shearing force the load capacity is reduced by as much as 75%. Additionally, even a small distance {between} the magnet’s surface and the plate decreases the holding force.
Handle Neodymium Magnets with Caution
Neodymium magnets can attract to each other due to their immense internal force, causing the skin and other body parts to get pinched and resulting in significant swellings.
If the joining of neodymium magnets is not controlled, then they may crumble and also crack. You can't approach them to each other. At a distance less than 10 cm you should hold them very strongly.
Do not give neodymium magnets to youngest children.
Remember that neodymium magnets are not toys. Be cautious and make sure no child plays with them. In the case of swallowing multiple magnets simultaneously, they can attract to each other through the intestinal walls. In the worst case scenario, this can lead to death.
Neodymium magnets are among the most powerful magnets on Earth. The surprising force they generate between each other can shock you.
To use magnets properly, it is best to familiarize yourself with our information beforehand. This will help you avoid significant harm to your body and the magnets themselves.
Never bring neodymium magnets close to a phone and GPS.
Intense magnetic fields generated by neodymium magnets interfere with compasses and magnetometers used in navigation, as well as internal compasses of smartphones and GPS devices.
Neodymium magnets can become demagnetized at high temperatures.
Although magnets have shown to retain their effectiveness up to 80°C or 175°F, this temperature may vary depending on the type of material, shape, and intended use of the magnet.
Neodymium magnets are not recommended for people with pacemakers.
In the case of neodymium magnets, there is a strong magnetic field. As a result, it interferes with the operation of a heart pacemaker. However, if the magnetic field does not affect the device, it can damage its components or deactivate the device when it is in a magnetic field.
The magnet coating contains nickel, so be cautious if you have a nickel allergy.
Studies clearly indicate a small percentage of people who suffer from metal allergies such as nickel. An allergic reaction often manifests as skin redness and rash. If you have a nickel allergy, you can try wearing gloves or simply avoid direct contact with nickel-plated neodymium magnets.
Neodymium magnets are highly susceptible to damage, leading to their cracking.
In the event of a collision between two neodymium magnets, it can result in them getting chipped. Despite being made of metal and coated with a shiny nickel plating, they are not as hard as steel. At the moment of collision between the magnets, small sharp metal pieces can be propelled in various directions at high speed. Eye protection is recommended.
Dust and powder from neodymium magnets are flammable.
Avoid drilling or mechanical processing of neodymium magnets. Once crushed into fine powder or dust, this material becomes highly flammable.
Under no circumstances should neodymium magnets be placed near a computer HDD, TV, and wallet.
Strong fields generated by neodymium magnets can damage magnetic storage media such as floppy disks, credit cards, magnetic ID cards, cassette tapes, video tapes, or other similar devices. They can also damage televisions, VCRs, computer monitors, and CRT displays. Avoid placing neodymium magnets in close proximity to electronic devices.
Safety rules!
To illustrate why neodymium magnets are so dangerous, see the article - How dangerous are very powerful neodymium magnets?.