SM 18x200 [2xM5] / N42 - magnetic separator
magnetic separator
Catalog no 130273
GTIN: 5906301812753
Diameter Ø [±0,1 mm]
18 mm
Height [±0,1 mm]
200 mm
Weight
0.01 g
442.80 ZŁ with VAT / pcs + price for transport
360.00 ZŁ net + 23% VAT / pcs
bulk discounts:
Need more?Hunting for a discount?
Call us now
+48 888 99 98 98
otherwise get in touch via
form
our website.
Lifting power and form of magnetic components can be reviewed on our
our magnetic calculator.
Orders placed before 14:00 will be shipped the same business day.
Magnetic properties of material N42
Physical properties of sintered neodymium magnets Nd2Fe14B at 20°C
Shopping tips
Strengths as well as weaknesses of rare earth magnets.
Besides their tremendous strength, neodymium magnets offer the following advantages:
- They virtually do not lose power, because even after 10 years the decline in efficiency is only ~1% (in laboratory conditions),
- Neodymium magnets are characterized by exceptionally resistant to magnetic field loss caused by external interference,
- A magnet with a shiny gold surface has better aesthetics,
- The surface of neodymium magnets generates a strong magnetic field – this is a key feature,
- Thanks to resistance to high temperature, they are capable of working (depending on the shape) even at temperatures up to 230°C and higher...
- Thanks to modularity in constructing and the ability to modify to specific needs,
- Significant place in future technologies – they are commonly used in hard drives, motor assemblies, diagnostic systems, and industrial machines.
- Relatively small size with high pulling force – neodymium magnets offer impressive pulling force in compact dimensions, which allows their use in miniature devices
Disadvantages of NdFeB magnets:
- To avoid cracks upon strong impacts, we recommend using special steel holders. Such a solution protects the magnet and simultaneously improves its durability.
- When exposed to high temperature, neodymium magnets suffer a drop in strength. Often, when the temperature exceeds 80°C, their power decreases (depending on the size, as well as shape of the magnet). For those who need magnets for extreme conditions, we offer [AH] versions withstanding up to 230°C
- Magnets exposed to a humid environment can rust. Therefore while using outdoors, we advise using water-impermeable magnets made of rubber, plastic or other material resistant to moisture
- Limited possibility of producing threads in the magnet and complex shapes - preferred is cover - magnet mounting.
- Possible danger resulting from small fragments of magnets can be dangerous, in case of ingestion, which gains importance in the context of child safety. It is also worth noting that small elements of these devices are able to be problematic in diagnostics medical in case of swallowing.
- With budget limitations the cost of neodymium magnets can be a barrier,
Best holding force of the magnet in ideal parameters – what it depends on?
Information about lifting capacity is the result of a measurement for optimal configuration, including:
- on a block made of mild steel, optimally conducting the magnetic flux
- whose thickness equals approx. 10 mm
- characterized by lack of roughness
- under conditions of no distance (surface-to-surface)
- for force applied at a right angle (in the magnet axis)
- in temp. approx. 20°C
Practical aspects of lifting capacity – factors
Real force impacted by specific conditions, such as (from priority):
- Space between magnet and steel – even a fraction of a millimeter of distance (caused e.g. by varnish or dirt) drastically reduces the pulling force, often by half at just 0.5 mm.
- Pull-off angle – note that the magnet has greatest strength perpendicularly. Under shear forces, the capacity drops significantly, often to levels of 20-30% of the maximum value.
- Substrate thickness – for full efficiency, the steel must be adequately massive. Thin sheet limits the lifting capacity (the magnet "punches through" it).
- Steel grade – the best choice is high-permeability steel. Cast iron may generate lower lifting capacity.
- Surface condition – smooth surfaces guarantee perfect abutment, which improves field saturation. Uneven metal reduce efficiency.
- Thermal factor – high temperature weakens magnetic field. Too high temperature can permanently damage the magnet.
* Lifting capacity testing was conducted on plates with a smooth surface of optimal thickness, under perpendicular forces, in contrast under attempts to slide the magnet the lifting capacity is smaller. Additionally, even a small distance {between} the magnet and the plate lowers the load capacity.
Precautions when working with neodymium magnets
Compass and GPS
GPS units and mobile phones are extremely sensitive to magnetism. Direct contact with a strong magnet can ruin the internal compass in your phone.
Handling rules
Before starting, check safety instructions. Uncontrolled attraction can break the magnet or injure your hand. Be predictive.
Magnet fragility
NdFeB magnets are ceramic materials, meaning they are very brittle. Impact of two magnets will cause them cracking into shards.
Swallowing risk
Strictly store magnets out of reach of children. Ingestion danger is high, and the consequences of magnets clamping inside the body are very dangerous.
Bone fractures
Danger of trauma: The pulling power is so great that it can cause blood blisters, crushing, and even bone fractures. Protective gloves are recommended.
Nickel coating and allergies
Medical facts indicate that nickel (the usual finish) is a potent allergen. If your skin reacts to metals, refrain from touching magnets with bare hands or select coated magnets.
Dust explosion hazard
Dust created during grinding of magnets is self-igniting. Do not drill into magnets unless you are an expert.
Cards and drives
Very strong magnetic fields can erase data on payment cards, HDDs, and storage devices. Maintain a gap of min. 10 cm.
Warning for heart patients
People with a pacemaker should keep an large gap from magnets. The magnetism can disrupt the functioning of the implant.
Power loss in heat
Monitor thermal conditions. Heating the magnet to high heat will destroy its properties and pulling force.
Attention!
More info about risks in the article: Safety of working with magnets.
