SM 25x325 [2xM8] / N52 - magnetic separator
magnetic separator
Catalog no 130370
GTIN: 5906301813187
Diameter Ø [±0,1 mm]
25 mm
Height [±0,1 mm]
325 mm
Weight
0.01 g
984.00 ZŁ with VAT / pcs + price for transport
800.00 ZŁ net + 23% VAT / pcs
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SM 25x325 [2xM8] / N52 - magnetic separator
Magnetic properties of material N52
Physical properties of NdFeB
Shopping tips
Advantages as well as disadvantages of neodymium magnets NdFeB.
In addition to their remarkable field intensity, neodymium magnets offer the following advantages:
- They have constant strength, and over around ten years their performance decreases symbolically – ~1% (according to theory),
- Their ability to resist magnetic interference from external fields is notable,
- Because of the reflective layer of nickel, the component looks aesthetically refined,
- They have exceptional magnetic induction on the surface of the magnet,
- These magnets tolerate elevated temperatures, often exceeding 230°C, when properly designed (in relation to form),
- With the option for tailored forming and precise design, these magnets can be produced in numerous shapes and sizes, greatly improving application potential,
- Important function in modern technologies – they are utilized in hard drives, electromechanical systems, healthcare devices or even high-tech tools,
- Relatively small size with high magnetic force – neodymium magnets offer intense magnetic field in small dimensions, which makes them useful in compact constructions
Disadvantages of NdFeB magnets:
- They may fracture when subjected to a powerful impact. If the magnets are exposed to shocks, we recommend in a protective enclosure. The steel housing, in the form of a holder, protects the magnet from cracks , and at the same time increases its overall resistance,
- They lose strength at increased temperatures. Most neodymium magnets experience permanent loss 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,
- Magnets exposed to moisture can degrade. Therefore, for outdoor applications, we advise waterproof types made of coated materials,
- The use of a protective casing or external holder is recommended, since machining multi-axis shapes in neodymium magnets is not feasible,
- Potential hazard due to small fragments may arise, especially if swallowed, which is significant in the health of young users. Furthermore, minuscule fragments from these devices may complicate medical imaging once in the system,
- In cases of mass production, neodymium magnet cost may be a barrier,
Magnetic strength at its maximum – what affects it?
The given strength of the magnet represents the optimal strength, measured in the best circumstances, that is:
- with mild steel, serving as a magnetic flux conductor
- with a thickness of minimum 10 mm
- with a polished side
- in conditions of no clearance
- with vertical force applied
- under standard ambient temperature
Practical lifting capacity: influencing factors
Practical lifting force is determined by factors, by priority:
- 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 was assessed using a steel plate with a smooth surface of suitable thickness (min. 20 mm), under perpendicular pulling force, however under attempts to slide the magnet the holding force is lower. In addition, even a small distance {between} the magnet and the plate reduces the holding force.
Caution with Neodymium Magnets
Dust and powder from neodymium magnets are flammable.
Avoid drilling or mechanical processing of neodymium magnets. If the magnet is crushed into fine powder or dust, it becomes highly flammable.
Neodymium magnets can become demagnetized at high temperatures.
Even though magnets have been observed to maintain their efficacy up to temperatures of 80°C or 175°F, it's essential to consider that this threshold may fluctuate depending on the magnet's type, configuration, and intended usage.
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. Small magnets can pose a serious choking hazard. If multiple magnets are swallowed, they can attract to each other through the intestinal walls, causing significant injuries, and even death.
The magnet coating contains nickel, so be cautious if you have a nickel allergy.
Studies show a small percentage of people have allergies to certain metals, including nickel. An allergic reaction often manifests as skin redness and rash. If you have a nickel allergy, try wearing gloves or avoid direct contact with nickel-plated neodymium magnets.
Neodymium magnets should not be near 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.
Neodymium magnets are the most powerful magnets ever created, and their strength can surprise you.
Please review the information on how to handle neodymium magnets and avoid significant harm to your body, as well as prevent unintentional disruption to the magnets.
Make sure not to bring neodymium magnets close to the TV, wallet, and computer HDD.
The strong magnetic field generated by neodymium magnets can damage magnetic media such as floppy disks, video tapes, HDDs, credit cards, magnetic ID cards, cassette tapes, or other devices. They can also destroy videos, televisions, CRT computer monitors. Remember not to place neodymium magnets close to these electronic devices.
Magnets made of neodymium are noted for their fragility, which can cause them to crumble.
Neodymium magnets are characterized by significant fragility. Neodymium magnetic are made of metal and coated with a shiny nickel, but they are not as durable as steel. In the event of a collision between two magnets, there may be a scattering of fragments in different directions. Protecting your eyes is crucial in such a situation.
Keep neodymium magnets as far away as possible from GPS and smartphones.
Neodymium magnets generate strong magnetic fields that interfere with magnetometers and compasses used in navigation, as well as internal compasses of smartphones and GPS devices.
Neodymium magnets are primarily characterized by their significant internal force. They attract to each other, and any object that comes in their way will be affected.
Neodymium magnets will bounce and touch together within a distance of several to around 10 cm from each other.
Pay attention!
So you are aware of why neodymium magnets are so dangerous, see the article titled How dangerous are very powerful neodymium magnets?.