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SM 25x250 [2xM8] / N52 - magnetic separator
magnetic separator
Catalog no 130371
GTIN/EAN: 5906301813194
Diameter Ø
25 mm [±1 mm]
Height
250 mm [±1 mm]
Weight
960 g
Magnetic Flux
~ 8 500 Gauss [±5%]
762.60 ZŁ with VAT / pcs + price for transport
620.00 ZŁ net + 23% VAT / pcs
bulk discounts:
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Lifting power along with appearance of neodymium magnets can be tested with our
force calculator.
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Detailed specification - SM 25x250 [2xM8] / N52 - magnetic separator
Specification / characteristics - SM 25x250 [2xM8] / N52 - magnetic separator
| properties | values |
|---|---|
| Cat. no. | 130371 |
| GTIN/EAN | 5906301813194 |
| Production/Distribution | Dhit sp. z o.o. |
| Country of origin | Poland / China / Germany |
| Customs code | 85059029 |
| Diameter Ø | 25 mm [±1 mm] |
| Height | 250 mm [±1 mm] |
| Weight | 960 g |
| Material Type | Stainless steel AISI 304 / A2 |
| Magnetic Flux | ~ 8 500 Gauss [±5%] |
| Size/Mount Quantity | M8x2 |
| Polarity | circumferential - 9 poles |
| Casing Tube Thickness | 1 mm |
| Manufacturing Tolerance | ±1 mm |
Magnetic properties of material N52
| properties | values | units |
|---|---|---|
| remenance Br [min. - max.] ? | 14.2-14.7 | kGs |
| remenance Br [min. - max.] ? | 1420-1470 | mT |
| coercivity bHc ? | 10.8-12.5 | kOe |
| coercivity bHc ? | 860-995 | kA/m |
| actual internal force iHc | ≥ 12 | kOe |
| actual internal force iHc | ≥ 955 | kA/m |
| energy density [min. - max.] ? | 48-53 | BH max MGOe |
| energy density [min. - max.] ? | 380-422 | BH max KJ/m |
| max. temperature ? | ≤ 80 | °C |
Physical properties of sintered neodymium magnets Nd2Fe14B at 20°C
| properties | values | units |
|---|---|---|
| Vickers hardness | ≥550 | Hv |
| Density | ≥7.4 | g/cm3 |
| Curie Temperature TC | 312 - 380 | °C |
| Curie Temperature TF | 593 - 716 | °F |
| Specific resistance | 150 | μΩ⋅cm |
| Bending strength | 250 | MPa |
| Compressive strength | 1000~1100 | MPa |
| Thermal expansion parallel (∥) to orientation (M) | (3-4) x 10-6 | °C-1 |
| Thermal expansion perpendicular (⊥) to orientation (M) | -(1-3) x 10-6 | °C-1 |
| Young's modulus | 1.7 x 104 | kg/mm² |
Table 1: Rod construction
SM 25x250 [2xM8] / N52
| Parameter | Value | Description / Unit |
|---|---|---|
| Diameter (Ø) | 25 | mm |
| Total length | 250 | mm (L) |
| Active length | 214 | mm |
| Section count | 9 | modules |
| Dead zone | 36 | mm (2x 18mm starter) |
| Weight (est.) | ~933 | g |
| Active area | 168 | cm² (Area) |
| Housing material | AISI 304 | 1.4301 (Inox) |
| Surface finish | Ra < 0.8 µm | Polished |
| Temp. class | 80°C | Standard (N) |
| Force loss (at max °C) | -12.8% | Reversible loss (physics) |
| Force (calculated) | 18.1 | kg (theor.) |
| Induction (surface) | ~8 500 | Gauss (Max) |
Chart 2: Field profile (9 sections)
Chart 3: Temperature performance
Elemental analysis
| iron (Fe) | 64% – 68% |
| neodymium (Nd) | 29% – 32% |
| boron (B) | 1.1% – 1.2% |
| dysprosium (Dy) | 0.5% – 2.0% |
| coating (Ni-Cu-Ni) | < 0.05% |
Ecology and recycling (GPSR)
| recyclability (EoL) | 100% |
| recycled raw materials | ~10% (pre-cons) |
| carbon footprint | low / zredukowany |
| waste code (EWC) | 16 02 16 |
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Advantages as well as disadvantages of Nd2Fe14B magnets.
Pros
- They virtually do not lose power, because even after ten years the performance loss is only ~1% (based on calculations),
- They are extremely resistant to demagnetization induced by external field influence,
- A magnet with a smooth silver surface is more attractive,
- They are known for high magnetic induction at the operating surface, which affects their effectiveness,
- Made from properly selected components, these magnets show impressive resistance to high heat, enabling them to function (depending on their form) at temperatures up to 230°C and above...
- Possibility of custom machining as well as optimizing to precise needs,
- Universal use in innovative solutions – they are commonly used in magnetic memories, electric motors, medical devices, also other advanced devices.
- Thanks to efficiency per cm³, small magnets offer high operating force, with minimal size,
Cons
- To avoid cracks under impact, we suggest using special steel holders. Such a solution protects the magnet and simultaneously improves its durability.
- When exposed to high temperature, neodymium magnets experience a drop in force. Often, when the temperature exceeds 80°C, their strength decreases (depending on the size and 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 recommend using waterproof magnets made of rubber, plastic or other material stable to moisture, in case of application outdoors
- Due to limitations in realizing threads and complicated forms in magnets, we propose using cover - magnetic mount.
- Health risk resulting from small fragments of magnets pose a threat, in case of ingestion, which is particularly important in the context of child safety. Additionally, small components of these magnets are able to disrupt the diagnostic process medical after entering the body.
- With mass production the cost of neodymium magnets is a challenge,
Holding force characteristics
Breakaway strength of the magnet in ideal conditions – what contributes to it?
- on a base made of mild steel, effectively closing the magnetic field
- whose thickness equals approx. 10 mm
- with an ideally smooth contact surface
- with zero gap (no paint)
- under perpendicular force direction (90-degree angle)
- in neutral thermal conditions
Key elements affecting lifting force
- Distance (between the magnet and the metal), since even a very small clearance (e.g. 0.5 mm) results in a drastic drop in force by up to 50% (this also applies to paint, corrosion or debris).
- Force direction – catalog parameter refers to detachment vertically. When slipping, the magnet exhibits significantly lower power (often approx. 20-30% of nominal force).
- Substrate thickness – for full efficiency, the steel must be adequately massive. Paper-thin metal limits the attraction force (the magnet "punches through" it).
- Material composition – not every steel attracts identically. High carbon content worsen the attraction effect.
- Surface finish – full contact is obtained only on polished steel. Rough texture reduce the real contact area, reducing force.
- Heat – NdFeB sinters have a negative temperature coefficient. When it is hot they are weaker, and in frost gain strength (up to a certain limit).
Holding force was tested on the plate surface of 20 mm thickness, when the force acted perpendicularly, whereas under parallel forces the load capacity is reduced by as much as 5 times. Moreover, even a minimal clearance between the magnet and the plate reduces the holding force.
Safe handling of NdFeB magnets
Magnet fragility
Despite metallic appearance, neodymium is brittle and not impact-resistant. Avoid impacts, as the magnet may crumble into hazardous fragments.
Fire risk
Machining of NdFeB material carries a risk of fire hazard. Magnetic powder oxidizes rapidly with oxygen and is hard to extinguish.
Life threat
Warning for patients: Strong magnetic fields affect medical devices. Keep minimum 30 cm distance or request help to handle the magnets.
Product not for children
These products are not toys. Eating a few magnets can lead to them connecting inside the digestive tract, which constitutes a severe health hazard and requires immediate surgery.
Heat sensitivity
Regular neodymium magnets (N-type) undergo demagnetization when the temperature exceeds 80°C. Damage is permanent.
Allergic reactions
Medical facts indicate that the nickel plating (standard magnet coating) is a strong allergen. For allergy sufferers, avoid direct skin contact and choose versions in plastic housing.
Pinching danger
Large magnets can smash fingers instantly. Do not put your hand betwixt two attracting surfaces.
Handling rules
Handle with care. Neodymium magnets attract from a distance and connect with huge force, often quicker than you can move away.
Threat to navigation
A powerful magnetic field disrupts the operation of compasses in phones and navigation systems. Keep magnets close to a device to avoid damaging the sensors.
Cards and drives
Equipment safety: Neodymium magnets can ruin payment cards and sensitive devices (heart implants, medical aids, mechanical watches).
Tabela kosztu i czasu dostawy
Płatność przed wysyłką:
GLS kurier
Przesyłka będzie u Ciebie za 2-3 dni
14.99 ZŁ
InPost Paczkomaty 24/7
Przesyłka będzie u Ciebie za 1-2 dni
12.30 ZŁ
Płatność przy odbiorze (pobranie):
GLS kurier
Przesyłka będzie u Ciebie za 1-2 dni
23.00 ZŁ
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