SM 25x100 [2xM8] / N42 - magnetic separator
magnetic separator
Catalog no 130287
GTIN: 5906301812807
Diameter Ø [±0,1 mm]
25 mm
Height [±0,1 mm]
100 mm
Weight
0.01 g
246.00 ZŁ with VAT / pcs + price for transport
200.00 ZŁ net + 23% VAT / pcs
bulk discounts:
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Magnetic properties of material N42
Physical properties of sintered neodymium magnets Nd2Fe14B at 20°C
Shopping tips
Pros as well as cons of rare earth magnets.
Besides their high retention, neodymium magnets are valued for these benefits:
- They have constant strength, and over more than 10 years their attraction force decreases symbolically – ~1% (in testing),
- They retain their magnetic properties even under close interference source,
- By using a reflective coating of silver, the element presents an nice look,
- They show high magnetic induction at the operating surface, making them more effective,
- Made from properly selected components, these magnets show impressive resistance to high heat, enabling them to function (depending on their shape) at temperatures up to 230°C and above...
- Considering the option of free forming and customization to individualized needs, neodymium magnets can be modeled in a wide range of geometric configurations, which expands the range of possible applications,
- Versatile presence in modern technologies – they serve a role in hard drives, drive modules, advanced medical instruments, also complex engineering applications.
- Thanks to efficiency per cm³, small magnets offer high operating force, occupying minimum space,
Disadvantages of neodymium magnets:
- Susceptibility to cracking is one of their disadvantages. Upon strong impact they can break. We advise keeping them in a strong case, which not only secures them against impacts but also increases their durability
- When exposed to high temperature, neodymium magnets suffer a drop in strength. Often, when the temperature exceeds 80°C, their strength 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
- Due to the susceptibility of magnets to corrosion in a humid environment, we suggest using waterproof magnets made of rubber, plastic or other material stable to moisture, when using outdoors
- Due to limitations in creating nuts and complicated shapes in magnets, we propose using cover - magnetic holder.
- Possible danger to health – tiny shards of magnets are risky, when accidentally swallowed, which becomes key in the context of child health protection. It is also worth noting that small components of these products are able to be problematic in diagnostics medical after entering the body.
- Due to neodymium price, their price is relatively high,
Maximum lifting force for a neodymium magnet – what contributes to it?
Information about lifting capacity was determined for the most favorable conditions, assuming:
- on a plate made of mild steel, effectively closing the magnetic flux
- possessing a thickness of at least 10 mm to avoid saturation
- characterized by lack of roughness
- under conditions of ideal adhesion (metal-to-metal)
- under perpendicular application of breakaway force (90-degree angle)
- at room temperature
Determinants of practical lifting force of a magnet
Real force is influenced by specific conditions, including (from priority):
- Clearance – existence of any layer (paint, dirt, air) interrupts the magnetic circuit, which reduces power rapidly (even by 50% at 0.5 mm).
- Direction of force – maximum parameter is obtained only during perpendicular pulling. The shear force of the magnet along the plate is usually several times lower (approx. 1/5 of the lifting capacity).
- Substrate thickness – for full efficiency, the steel must be sufficiently thick. Paper-thin metal restricts the lifting capacity (the magnet "punches through" it).
- Steel type – mild steel gives the best results. Alloy admixtures reduce magnetic properties and lifting capacity.
- Surface finish – full contact is possible only on polished steel. Rough texture reduce the real contact area, weakening the magnet.
- Thermal conditions – neodymium magnets have a sensitivity to temperature. When it is hot they lose power, and at low temperatures they can be stronger (up to a certain limit).
* Lifting capacity testing was carried out on a smooth plate of optimal thickness, under perpendicular forces, in contrast under shearing force the holding force is lower. In addition, even a minimal clearance {between} the magnet and the plate decreases the lifting capacity.
H&S for magnets
Immense force
Be careful. Neodymium magnets act from a long distance and snap with huge force, often quicker than you can react.
Nickel coating and allergies
Nickel alert: The nickel-copper-nickel coating contains nickel. If skin irritation occurs, immediately stop handling magnets and wear gloves.
Life threat
People with a heart stimulator must keep an safe separation from magnets. The magnetic field can disrupt the operation of the life-saving device.
Mechanical processing
Powder produced during cutting of magnets is self-igniting. Avoid drilling into magnets unless you are an expert.
Keep away from children
Absolutely keep magnets away from children. Risk of swallowing is significant, and the consequences of magnets clamping inside the body are life-threatening.
GPS Danger
GPS units and smartphones are highly susceptible to magnetism. Direct contact with a strong magnet can permanently damage the internal compass in your phone.
Do not overheat magnets
Watch the temperature. Exposing the magnet above 80 degrees Celsius will ruin its magnetic structure and strength.
Data carriers
Equipment safety: Strong magnets can ruin payment cards and sensitive devices (heart implants, medical aids, mechanical watches).
Finger safety
Large magnets can crush fingers in a fraction of a second. Do not put your hand betwixt two strong magnets.
Beware of splinters
Despite the nickel coating, the material is brittle and not impact-resistant. Avoid impacts, as the magnet may crumble into hazardous fragments.
Safety First!
Details about risks in the article: Safety of working with magnets.
