SM 25x275 [2xM8] / N52 - magnetic separator
magnetic separator
Catalog no 130372
GTIN: 5906301813200
Diameter Ø [±0,1 mm]
25 mm
Height [±0,1 mm]
275 mm
Weight
0.01 g
836.40 ZŁ with VAT / pcs + price for transport
680.00 ZŁ net + 23% VAT / pcs
bulk discounts:
Need more?Not sure which magnet to buy?
Call us
+48 22 499 98 98
if you prefer get in touch using
contact form
the contact page.
Specifications as well as form of a neodymium magnet can be reviewed using our
modular calculator.
Same-day processing for orders placed before 14:00.
Magnetic properties of material N52
Physical properties of sintered neodymium magnets Nd2Fe14B at 20°C
Shopping tips
Advantages and disadvantages of rare earth magnets.
Besides their high retention, neodymium magnets are valued for these benefits:
- They do not lose magnetism, even during around ten years – the drop in power is only ~1% (based on measurements),
- Magnets perfectly defend themselves against demagnetization caused by ambient magnetic noise,
- By using a shiny layer of nickel, the element has an professional look,
- They show high magnetic induction at the operating surface, which improves attraction properties,
- Neodymium magnets are characterized by extremely high magnetic induction on the magnet surface and can function (depending on the shape) even at a temperature of 230°C or more...
- Possibility of exact forming and adjusting to concrete applications,
- Versatile presence in future technologies – they are used in hard drives, drive modules, diagnostic systems, as well as modern systems.
- Compactness – despite small sizes they offer powerful magnetic field, making them ideal for precision applications
Drawbacks and weaknesses of neodymium magnets and proposals for their use:
- Brittleness is one of their disadvantages. Upon intense impact they can fracture. We advise keeping them in a special holder, which not only protects them against impacts but also increases their durability
- We warn that neodymium magnets can reduce their power at high temperatures. To prevent this, we suggest our specialized [AH] magnets, which work effectively even at 230°C.
- They rust in a humid environment - during use outdoors we recommend using waterproof magnets e.g. in rubber, plastic
- Due to limitations in realizing threads and complex shapes in magnets, we recommend using casing - magnetic mechanism.
- Possible danger to health – tiny shards of magnets pose a threat, in case of ingestion, which is particularly important in the context of child health protection. Furthermore, small components of these devices are able to complicate diagnosis medical in case of swallowing.
- High unit price – neodymium magnets have a higher price than other types of magnets (e.g. ferrite), which hinders application in large quantities
Maximum magnetic pulling force – what affects it?
The force parameter is a result of laboratory testing performed under specific, ideal conditions:
- with the application of a yoke made of special test steel, guaranteeing full magnetic saturation
- possessing a thickness of min. 10 mm to avoid saturation
- with an ground contact surface
- without any air gap between the magnet and steel
- under axial force direction (90-degree angle)
- at standard ambient temperature
Determinants of practical lifting force of a magnet
In real-world applications, the actual holding force is determined by many variables, ranked from most significant:
- Space between surfaces – even a fraction of a millimeter of distance (caused e.g. by veneer or dirt) drastically reduces the magnet efficiency, often by half at just 0.5 mm.
- Force direction – declared lifting capacity refers to detachment vertically. When attempting to slide, the magnet holds much less (typically approx. 20-30% of maximum force).
- Base massiveness – too thin steel does not accept the full field, causing part of the flux to be escaped into the air.
- Material composition – not every steel attracts identically. Alloy additives worsen the interaction with the magnet.
- Surface structure – the more even the surface, the better the adhesion and stronger the hold. Roughness acts like micro-gaps.
- Thermal factor – high temperature weakens pulling force. Exceeding the limit temperature can permanently damage the magnet.
* Lifting capacity testing was carried out on a smooth plate of suitable thickness, under a perpendicular pulling force, however under attempts to slide the magnet the holding force is lower. Additionally, even a slight gap {between} the magnet’s surface and the plate decreases the lifting capacity.
Safety rules for work with neodymium magnets
Crushing force
Large magnets can smash fingers instantly. Never place your hand betwixt two strong magnets.
Handling guide
Before starting, check safety instructions. Sudden snapping can destroy the magnet or injure your hand. Be predictive.
Protective goggles
NdFeB magnets are sintered ceramics, meaning they are fragile like glass. Clashing of two magnets leads to them cracking into small pieces.
Implant safety
Warning for patients: Powerful magnets disrupt electronics. Keep at least 30 cm distance or request help to handle the magnets.
Allergy Warning
Medical facts indicate that the nickel plating (standard magnet coating) is a common allergen. For allergy sufferers, refrain from direct skin contact and choose coated magnets.
Do not give to children
Only for adults. Small elements pose a choking risk, causing serious injuries. Store out of reach of kids and pets.
Electronic hazard
Equipment safety: Neodymium magnets can ruin data carriers and delicate electronics (pacemakers, medical aids, timepieces).
GPS and phone interference
Navigation devices and smartphones are extremely sensitive to magnetism. Direct contact with a strong magnet can ruin the sensors in your phone.
Power loss in heat
Keep cool. Neodymium magnets are sensitive to temperature. If you require operation above 80°C, look for HT versions (H, SH, UH).
Mechanical processing
Powder generated during grinding of magnets is flammable. Avoid drilling into magnets without proper cooling and knowledge.
Attention!
Learn more about hazards in the article: Safety of working with magnets.
