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SM 25x250 [2xM8] / N42 - magnetic separator
magnetic separator
Catalog no 130293
GTIN/EAN: 5906301812869
Diameter Ø
25 mm [±1 mm]
Height
250 mm [±1 mm]
Weight
960 g
Magnetic Flux
~ 6 500 Gauss [±5%]
688.80 ZŁ with VAT / pcs + price for transport
560.00 ZŁ net + 23% VAT / pcs
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Technical parameters - SM 25x250 [2xM8] / N42 - magnetic separator
Specification / characteristics - SM 25x250 [2xM8] / N42 - magnetic separator
| properties | values |
|---|---|
| Cat. no. | 130293 |
| GTIN/EAN | 5906301812869 |
| 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 | ~ 6 500 Gauss [±5%] |
| Size/Mount Quantity | 2xM8 |
| Polarity | circumferential - 9 poles |
| Casing Tube Thickness | 1 mm |
| Manufacturing Tolerance | ±1 mm |
Magnetic properties of material N42
| properties | values | units |
|---|---|---|
| remenance Br [min. - max.] ? | 12.9-13.2 | kGs |
| remenance Br [min. - max.] ? | 1290-1320 | mT |
| coercivity bHc ? | 10.8-12.0 | kOe |
| coercivity bHc ? | 860-955 | kA/m |
| actual internal force iHc | ≥ 12 | kOe |
| actual internal force iHc | ≥ 955 | kA/m |
| energy density [min. - max.] ? | 40-42 | BH max MGOe |
| energy density [min. - max.] ? | 318-334 | 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] / N42
| 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) | 10.6 | kg (theor.) |
| Induction (surface) | ~6 500 | Gauss (Max) |
Chart 2: Field profile (9 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% |
Sustainability
| recyclability (EoL) | 100% |
| recycled raw materials | ~10% (pre-cons) |
| carbon footprint | low / zredukowany |
| waste code (EWC) | 16 02 16 |
Other proposals
![SM 18x275 [2xM5] / N42 - magnetic separator](https://cdn3.dhit.pl/graphics/products/sm-18x275-2xm5-zep.jpg "SM 18x275 [2xM5] / N42 - magnetic separator")
Pros and cons of rare earth magnets.
Advantages
- They retain attractive force for nearly 10 years – the drop is just ~1% (according to analyses),
- They are noted for resistance to demagnetization induced by presence of other magnetic fields,
- By applying a smooth coating of silver, the element presents an aesthetic look,
- The surface of neodymium magnets generates a maximum magnetic field – this is one of their assets,
- 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...
- Due to the possibility of accurate shaping and adaptation to custom needs, neodymium magnets can be modeled in a broad palette of shapes and sizes, which expands the range of possible applications,
- Huge importance in modern technologies – they serve a role in data components, drive modules, diagnostic systems, as well as other advanced devices.
- Thanks to concentrated force, small magnets offer high operating force, occupying minimum space,
Weaknesses
- They are prone to damage upon heavy impacts. To avoid cracks, it is worth securing magnets using a steel holder. Such protection not only protects the magnet but also improves its resistance to damage
- NdFeB magnets demagnetize when exposed to high temperatures. After reaching 80°C, many of them experience permanent weakening of strength (a factor is the shape as well as dimensions of the magnet). We offer magnets specially adapted to work at temperatures up to 230°C marked [AH], which are very resistant to heat
- When exposed to humidity, magnets usually rust. To use them in conditions outside, it is recommended to use protective magnets, such as magnets in rubber or plastics, which prevent oxidation and corrosion.
- Due to limitations in realizing threads and complicated forms in magnets, we recommend using a housing - magnetic holder.
- Potential hazard resulting from small fragments of magnets pose a threat, if swallowed, which becomes key in the aspect of protecting the youngest. It is also worth noting that tiny parts of these products can be problematic in diagnostics medical when they are in the body.
- With large orders the cost of neodymium magnets can be a barrier,
Holding force characteristics
Highest magnetic holding force – what contributes to it?
- with the application of a sheet made of special test steel, ensuring maximum field concentration
- possessing a massiveness of at least 10 mm to ensure full flux closure
- characterized by lack of roughness
- under conditions of gap-free contact (surface-to-surface)
- during pulling in a direction vertical to the mounting surface
- at conditions approx. 20°C
Key elements affecting lifting force
- Distance – existence of any layer (rust, dirt, air) acts as an insulator, which reduces capacity steeply (even by 50% at 0.5 mm).
- Force direction – catalog parameter refers to pulling vertically. When attempting to slide, the magnet exhibits much less (often approx. 20-30% of maximum force).
- Element thickness – for full efficiency, the steel must be adequately massive. Paper-thin metal restricts the lifting capacity (the magnet "punches through" it).
- Material type – the best choice is high-permeability steel. Stainless steels may have worse magnetic properties.
- Surface finish – ideal contact is obtained only on polished steel. Rough texture reduce the real contact area, reducing force.
- Temperature influence – high temperature weakens magnetic field. Exceeding the limit temperature can permanently damage the magnet.
Lifting capacity was measured using a polished steel plate of suitable thickness (min. 20 mm), under perpendicular pulling force, however under shearing force the holding force is lower. In addition, even a minimal clearance between the magnet’s surface and the plate reduces the load capacity.
Precautions when working with neodymium magnets
Protective goggles
Despite the nickel coating, the material is delicate and not impact-resistant. Do not hit, as the magnet may crumble into hazardous fragments.
Keep away from computers
Do not bring magnets near a wallet, computer, or TV. The magnetic field can destroy these devices and wipe information from cards.
Do not give to children
Absolutely keep magnets away from children. Choking hazard is significant, and the consequences of magnets clamping inside the body are life-threatening.
Do not drill into magnets
Powder generated during machining of magnets is self-igniting. Avoid drilling into magnets unless you are an expert.
Bodily injuries
Protect your hands. Two large magnets will join immediately with a force of massive weight, destroying everything in their path. Exercise extreme caution!
Life threat
Warning for patients: Strong magnetic fields affect medical devices. Keep minimum 30 cm distance or request help to handle the magnets.
Handling guide
Exercise caution. Neodymium magnets attract from a long distance and connect with huge force, often faster than you can react.
Power loss in heat
Regular neodymium magnets (grade N) lose magnetization when the temperature surpasses 80°C. This process is irreversible.
Magnetic interference
An intense magnetic field interferes with the functioning of magnetometers in phones and GPS navigation. Maintain magnets near a device to avoid breaking the sensors.
Metal Allergy
It is widely known that nickel (standard magnet coating) is a common allergen. If you have an allergy, refrain from direct skin contact or select coated magnets.
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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