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SM 25x400 [2xM8] / N52 - magnetic separator
magnetic separator
Catalog no 130470
GTIN/EAN: 5906301813132
Diameter Ø
25 mm [±1 mm]
Height
400 mm [±1 mm]
Weight
1560 g
Magnetic Flux
~ 8 500 Gauss [±5%]
1205.40 ZŁ with VAT / pcs + price for transport
980.00 ZŁ net + 23% VAT / pcs
bulk discounts:
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Strength as well as appearance of a neodymium magnet can be checked on our
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Technical - SM 25x400 [2xM8] / N52 - magnetic separator
Specification / characteristics - SM 25x400 [2xM8] / N52 - magnetic separator
| properties | values |
|---|---|
| Cat. no. | 130470 |
| GTIN/EAN | 5906301813132 |
| Production/Distribution | Dhit sp. z o.o. |
| Country of origin | Poland / China / Germany |
| Customs code | 85059029 |
| Diameter Ø | 25 mm [±1 mm] |
| Height | 400 mm [±1 mm] |
| Weight | 1560 g |
| Material Type | Stainless steel AISI 304 / A2 |
| Magnetic Flux | ~ 8 500 Gauss [±5%] |
| Size/Mount Quantity | M8x2 |
| Polarity | circumferential - 15 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 25x400 [2xM8] / N52
| Parameter | Value | Description / Unit |
|---|---|---|
| Diameter (Ø) | 25 | mm |
| Total length | 400 | mm (L) |
| Active length | 364 | mm |
| Section count | 15 | modules |
| Dead zone | 36 | mm (2x 18mm starter) |
| Weight (est.) | ~1492 | g |
| Active area | 286 | 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 (15 sections)
Chart 3: Temperature performance
Material specification
| 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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![UMH 25x8x45 [M5] / N38 - magnetic holder with hook](https://cdn3.dhit.pl/graphics/products/umh-25x8x45-m5-cep.jpg "UMH 25x8x45 [M5] / N38 - magnetic holder with hook")
Strengths and weaknesses of rare earth magnets.
Pros
- They virtually do not lose power, because even after 10 years the performance loss is only ~1% (in laboratory conditions),
- They feature excellent resistance to magnetic field loss when exposed to external magnetic sources,
- By using a lustrous layer of nickel, the element acquires an nice look,
- Neodymium magnets achieve maximum magnetic induction on a their surface, which allows for strong attraction,
- Through (adequate) combination of ingredients, they can achieve high thermal strength, enabling functioning at temperatures reaching 230°C and above...
- Possibility of precise machining as well as adjusting to precise conditions,
- Significant place in innovative solutions – they are commonly used in mass storage devices, electromotive mechanisms, advanced medical instruments, as well as modern systems.
- Compactness – despite small sizes they offer powerful magnetic field, making them ideal for precision applications
Weaknesses
- At very strong impacts they can crack, therefore we advise placing them in strong housings. A metal housing provides additional protection against damage and increases the magnet's durability.
- Neodymium magnets lose their strength under the influence of heating. As soon as 80°C is exceeded, many of them start losing their force. Therefore, we recommend our special magnets marked [AH], which maintain stability even at temperatures up to 230°C
- Due to the susceptibility of magnets to corrosion in a humid environment, we advise using waterproof magnets made of rubber, plastic or other material immune to moisture, in case of application outdoors
- Due to limitations in producing threads and complicated forms in magnets, we recommend using casing - magnetic mount.
- Possible danger related to microscopic parts of magnets can be dangerous, when accidentally swallowed, which becomes key in the context of child safety. Additionally, small elements of these products can be problematic in diagnostics medical in case of swallowing.
- With mass production the cost of neodymium magnets is a challenge,
Holding force characteristics
Optimal lifting capacity of a neodymium magnet – what it depends on?
- with the contact of a sheet made of special test steel, guaranteeing full magnetic saturation
- whose thickness reaches at least 10 mm
- with a surface free of scratches
- under conditions of gap-free contact (surface-to-surface)
- for force applied at a right angle (pull-off, not shear)
- in stable room temperature
Determinants of lifting force in real conditions
- Gap (between the magnet and the metal), as even a microscopic clearance (e.g. 0.5 mm) results in a reduction in lifting capacity by up to 50% (this also applies to varnish, corrosion or debris).
- Loading method – declared lifting capacity refers to detachment vertically. When slipping, the magnet exhibits significantly lower power (typically approx. 20-30% of nominal force).
- Substrate thickness – for full efficiency, the steel must be sufficiently thick. Thin sheet limits the lifting capacity (the magnet "punches through" it).
- Chemical composition of the base – mild steel gives the best results. Alloy steels lower magnetic properties and holding force.
- Base smoothness – the more even the surface, the larger the contact zone and higher the lifting capacity. Roughness creates an air distance.
- Operating temperature – NdFeB sinters have a negative temperature coefficient. When it is hot they lose power, and in frost they can be stronger (up to a certain limit).
Holding force was measured on a smooth steel plate of 20 mm thickness, when the force acted perpendicularly, however under shearing force the holding force is lower. Moreover, even a small distance between the magnet and the plate decreases the load capacity.
Safety rules for work with neodymium magnets
Pinching danger
Risk of injury: The pulling power is so great that it can cause blood blisters, crushing, and broken bones. Protective gloves are recommended.
Permanent damage
Do not overheat. Neodymium magnets are sensitive to heat. If you need operation above 80°C, look for special high-temperature series (H, SH, UH).
Swallowing risk
Strictly store magnets away from children. Choking hazard is high, and the effects of magnets connecting inside the body are very dangerous.
Fire risk
Mechanical processing of neodymium magnets carries a risk of fire risk. Neodymium dust reacts violently with oxygen and is difficult to extinguish.
Shattering risk
Watch out for shards. Magnets can fracture upon uncontrolled impact, ejecting shards into the air. Eye protection is mandatory.
Electronic hazard
Powerful magnetic fields can corrupt files on credit cards, hard drives, and storage devices. Keep a distance of min. 10 cm.
Immense force
Exercise caution. Rare earth magnets act from a distance and snap with huge force, often faster than you can react.
Allergic reactions
Studies show that the nickel plating (standard magnet coating) is a common allergen. If you have an allergy, prevent direct skin contact and select encased magnets.
Warning for heart patients
Warning for patients: Strong magnetic fields disrupt electronics. Maintain at least 30 cm distance or ask another person to handle the magnets.
Threat to navigation
A strong magnetic field interferes with the operation of compasses in smartphones and GPS navigation. Keep magnets close to a smartphone to prevent breaking the sensors.
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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