SM 25x200 [2xM8] / N52 - magnetic separator
magnetic separator
Catalog no 130364
GTIN: 5906301813125
Diameter Ø [±0,1 mm]
25 mm
Height [±0,1 mm]
200 mm
Weight
0.01 g
615.00 ZŁ with VAT / pcs + price for transport
500.00 ZŁ net + 23% VAT / pcs
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Magnetic properties of material N52
Physical properties of sintered neodymium magnets Nd2Fe14B at 20°C
Shopping tips
Pros and cons of NdFeB magnets.
Besides their immense field intensity, neodymium magnets offer the following advantages:
- They do not lose magnetism, even after nearly 10 years – the reduction in strength is only ~1% (based on measurements),
- They are noted for resistance to demagnetization induced by external magnetic fields,
- In other words, due to the metallic layer of nickel, the element becomes visually attractive,
- They show high magnetic induction at the operating surface, which affects their effectiveness,
- Due to their durability and thermal resistance, neodymium magnets are capable of operate (depending on the shape) even at high temperatures reaching 230°C or more...
- Thanks to the possibility of free molding and customization to custom needs, neodymium magnets can be modeled in a variety of forms and dimensions, which expands the range of possible applications,
- Wide application in high-tech industry – they are used in magnetic memories, electromotive mechanisms, diagnostic systems, and other advanced devices.
- Thanks to efficiency per cm³, small magnets offer high operating force, with minimal size,
Disadvantages of NdFeB magnets:
- Susceptibility to cracking is one of their disadvantages. Upon strong impact they can fracture. We advise keeping them in a special holder, which not only secures them against impacts but also increases their durability
- NdFeB magnets demagnetize when exposed to high temperatures. After reaching 80°C, many of them experience permanent weakening of strength (a factor is the shape as well as dimensions of the magnet). We offer magnets specially adapted to work at temperatures up to 230°C marked [AH], which are very resistant to heat
- Magnets exposed to a humid environment can corrode. Therefore while using outdoors, we advise using water-impermeable magnets made of rubber, plastic or other material resistant to moisture
- Due to limitations in producing threads and complicated forms in magnets, we recommend using cover - magnetic mechanism.
- Potential hazard to health – tiny shards of magnets are risky, in case of ingestion, which becomes key in the context of child safety. It is also worth noting that tiny parts of these products are able to complicate diagnosis medical after entering the body.
- Higher cost of purchase is a significant factor to consider compared to ceramic magnets, especially in budget applications
Breakaway strength of the magnet in ideal conditions – what affects it?
The load parameter shown refers to the maximum value, recorded under laboratory conditions, meaning:
- with the contact of a sheet made of low-carbon steel, ensuring maximum field concentration
- possessing a thickness of at least 10 mm to avoid saturation
- with an ideally smooth contact surface
- with zero gap (without paint)
- for force acting at a right angle (pull-off, not shear)
- in neutral thermal conditions
Key elements affecting lifting force
It is worth knowing that the magnet holding will differ subject to the following factors, starting with the most relevant:
- Air gap (betwixt the magnet and the plate), as even a tiny clearance (e.g. 0.5 mm) results in a drastic drop in force by up to 50% (this also applies to varnish, corrosion or debris).
- Direction of force – maximum parameter is obtained only during perpendicular pulling. The shear force of the magnet along the plate is usually many times lower (approx. 1/5 of the lifting capacity).
- Substrate thickness – for full efficiency, the steel must be adequately massive. Paper-thin metal restricts the lifting capacity (the magnet "punches through" it).
- Material composition – different alloys reacts the same. Alloy additives worsen the interaction with the magnet.
- Surface condition – smooth surfaces guarantee perfect abutment, which increases force. Rough surfaces weaken the grip.
- Temperature influence – high temperature reduces magnetic field. Too high temperature can permanently demagnetize the magnet.
* Holding force was measured on a smooth steel plate of 20 mm thickness, when the force acted perpendicularly, whereas 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 lowers the lifting capacity.
Safety rules for work with NdFeB magnets
Fragile material
Despite the nickel coating, the material is delicate and not impact-resistant. Avoid impacts, as the magnet may shatter into sharp, dangerous pieces.
Keep away from electronics
GPS units and smartphones are highly susceptible to magnetic fields. Close proximity with a powerful NdFeB magnet can ruin the sensors in your phone.
Threat to electronics
Avoid bringing magnets close to a purse, laptop, or TV. The magnetic field can permanently damage these devices and wipe information from cards.
Do not give to children
Absolutely store magnets out of reach of children. Choking hazard is significant, and the consequences of magnets connecting inside the body are very dangerous.
Fire risk
Fire hazard: Rare earth powder is highly flammable. Avoid machining magnets in home conditions as this may cause fire.
Powerful field
Exercise caution. Neodymium magnets act from a long distance and snap with huge force, often faster than you can move away.
Physical harm
Watch your fingers. Two large magnets will join instantly with a force of massive weight, destroying everything in their path. Exercise extreme caution!
Medical implants
Patients with a heart stimulator should keep an large gap from magnets. The magnetism can interfere with the operation of the life-saving device.
Thermal limits
Do not overheat. NdFeB magnets are susceptible to heat. If you require operation above 80°C, inquire about special high-temperature series (H, SH, UH).
Avoid contact if allergic
A percentage of the population have a contact allergy to Ni, which is the standard coating for neodymium magnets. Extended handling might lead to skin redness. We strongly advise wear safety gloves.
Caution!
Learn more about hazards in the article: Magnet Safety Guide.
