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SM 25x175 [2xM8] / N52 - magnetic separator
magnetic separator
Catalog no 130369
GTIN/EAN: 5906301813170
Diameter Ø
25 mm [±1 mm]
Height
175 mm [±1 mm]
Weight
660 g
Magnetic Flux
~ 9 500 Gauss [±5%]
541.20 ZŁ with VAT / pcs + price for transport
440.00 ZŁ net + 23% VAT / pcs
bulk discounts:
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Force as well as appearance of neodymium magnets can be checked on our
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Detailed specification - SM 25x175 [2xM8] / N52 - magnetic separator
Specification / characteristics - SM 25x175 [2xM8] / N52 - magnetic separator
| properties | values |
|---|---|
| Cat. no. | 130369 |
| GTIN/EAN | 5906301813170 |
| Production/Distribution | Dhit sp. z o.o. |
| Country of origin | Poland / China / Germany |
| Customs code | 85059029 |
| Diameter Ø | 25 mm [±1 mm] |
| Height | 175 mm [±1 mm] |
| Weight | 660 g |
| Material Type | Stainless steel AISI 304 / A2 |
| Magnetic Flux | ~ 9 500 Gauss [±5%] |
| Size/Mount Quantity | 2xM8 |
| Polarity | circumferential - 6 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 25x175 [2xM8] / N52
| Parameter | Value | Description / Unit |
|---|---|---|
| Diameter (Ø) | 25 | mm |
| Total length | 175 | mm (L) |
| Active length | 139 | mm |
| Section count | 6 | modules |
| Dead zone | 36 | mm (2x 18mm starter) |
| Weight (est.) | ~653 | g |
| Active area | 109 | 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) | 22.6 | kg (theor.) |
| Induction (surface) | ~9 500 | Gauss (Max) |
Chart 2: Field profile (6 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 |
See also deals
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![SM 19x225 [2xM6] / N50 - magnetic separator](https://cdn3.dhit.pl/graphics/products/sm-19x225-2xm6-jis.jpg "SM 19x225 [2xM6] / N50 - magnetic separator")
Advantages as well as disadvantages of neodymium magnets.
Pros
- They virtually do not lose strength, because even after ten years the performance loss is only ~1% (according to literature),
- They feature excellent resistance to magnetic field loss when exposed to external magnetic sources,
- Thanks to the elegant finish, the layer of nickel, gold-plated, or silver gives an aesthetic appearance,
- Magnetic induction on the working layer of the magnet turns out to be maximum,
- Thanks to resistance to high temperature, they are capable of working (depending on the form) even at temperatures up to 230°C and higher...
- Thanks to the option of precise molding and adaptation to custom projects, magnetic components can be created in a broad palette of geometric configurations, which amplifies use scope,
- Significant place in modern technologies – they are used in hard drives, brushless drives, precision medical tools, and complex engineering applications.
- Relatively small size with high pulling force – neodymium magnets offer strong magnetic field in small dimensions, which makes them useful in miniature devices
Limitations
- They are fragile upon too strong impacts. To avoid cracks, it is worth protecting magnets using a steel holder. Such protection not only protects the magnet but also increases its resistance to damage
- When exposed to high temperature, neodymium magnets suffer a drop in power. 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
- When exposed to humidity, magnets start to rust. For applications outside, it is recommended to use protective magnets, such as magnets in rubber or plastics, which prevent oxidation as well as corrosion.
- Due to limitations in realizing nuts and complicated forms in magnets, we propose using a housing - magnetic holder.
- Potential hazard related to microscopic parts of magnets can be dangerous, if swallowed, which is particularly important in the context of child safety. Additionally, small components of these magnets are able to be problematic in diagnostics medical in case of swallowing.
- Due to expensive raw materials, their price exceeds standard values,
Pull force analysis
Maximum lifting capacity of the magnet – what affects it?
- on a base made of structural steel, perfectly concentrating the magnetic field
- possessing a thickness of minimum 10 mm to avoid saturation
- characterized by smoothness
- under conditions of gap-free contact (surface-to-surface)
- for force acting at a right angle (in the magnet axis)
- in stable room temperature
What influences lifting capacity in practice
- Clearance – existence of any layer (rust, dirt, gap) interrupts the magnetic circuit, which reduces power rapidly (even by 50% at 0.5 mm).
- Direction of force – highest force is reached only during pulling at a 90° angle. The shear force of the magnet along the plate is standardly several times lower (approx. 1/5 of the lifting capacity).
- Metal thickness – thin material does not allow full use of the magnet. Part of the magnetic field passes through the material instead of converting into lifting capacity.
- Material composition – not every steel reacts the same. High carbon content weaken the attraction effect.
- Surface finish – full contact is possible only on smooth steel. Rough texture reduce the real contact area, reducing force.
- Heat – NdFeB sinters have a negative temperature coefficient. At higher temperatures they lose power, and in frost they can be stronger (up to a certain limit).
Holding force was tested on a smooth steel plate of 20 mm thickness, when a perpendicular force was applied, however under parallel forces the holding force is lower. In addition, even a slight gap between the magnet and the plate lowers the load capacity.
Precautions when working with NdFeB magnets
Allergy Warning
Some people have a contact allergy to Ni, which is the standard coating for NdFeB magnets. Extended handling can result in skin redness. We recommend wear protective gloves.
Eye protection
Despite the nickel coating, neodymium is brittle and cannot withstand shocks. Do not hit, as the magnet may crumble into sharp, dangerous pieces.
Threat to electronics
Intense magnetic fields can erase data on payment cards, HDDs, and other magnetic media. Keep a distance of at least 10 cm.
Bodily injuries
Watch your fingers. Two powerful magnets will snap together immediately with a force of massive weight, crushing anything in their path. Be careful!
Warning for heart patients
Medical warning: Strong magnets can turn off pacemakers and defibrillators. Do not approach if you have medical devices.
Conscious usage
Before starting, check safety instructions. Uncontrolled attraction can destroy the magnet or hurt your hand. Be predictive.
GPS Danger
GPS units and mobile phones are highly sensitive to magnetism. Direct contact with a strong magnet can permanently damage the sensors in your phone.
No play value
These products are not suitable for play. Accidental ingestion of multiple magnets can lead to them attracting across intestines, which constitutes a direct threat to life and requires immediate surgery.
Mechanical processing
Fire warning: Rare earth powder is highly flammable. Do not process magnets in home conditions as this may cause fire.
Do not overheat magnets
Monitor thermal conditions. Exposing the magnet above 80 degrees Celsius will ruin its magnetic structure and strength.
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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