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SM 25x125 [2xM8] / N42 - magnetic separator
magnetic separator
Catalog no 130288
GTIN/EAN: 5906301812814
Diameter Ø
25 mm [±1 mm]
Height
125 mm [±1 mm]
Weight
460 g
Magnetic Flux
~ 6 500 Gauss [±5%]
319.80 ZŁ with VAT / pcs + price for transport
260.00 ZŁ net + 23% VAT / pcs
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Physical properties - SM 25x125 [2xM8] / N42 - magnetic separator
Specification / characteristics - SM 25x125 [2xM8] / N42 - magnetic separator
| properties | values |
|---|---|
| Cat. no. | 130288 |
| GTIN/EAN | 5906301812814 |
| Production/Distribution | Dhit sp. z o.o. |
| Country of origin | Poland / China / Germany |
| Customs code | 85059029 |
| Diameter Ø | 25 mm [±1 mm] |
| Height | 125 mm [±1 mm] |
| Weight | 460 g |
| Material Type | Stainless steel AISI 304 / A2 |
| Magnetic Flux | ~ 6 500 Gauss [±5%] |
| Size/Mount Quantity | 2xM8 |
| Polarity | circumferential - 4 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 25x125 [2xM8] / N42
| Parameter | Value | Description / Unit |
|---|---|---|
| Diameter (Ø) | 25 | mm |
| Total length | 125 | mm (L) |
| Active length | 89 | mm |
| Section count | 3 | modules |
| Dead zone | 36 | mm (2x 18mm starter) |
| Weight (est.) | ~466 | g |
| Active area | 70 | 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 (3 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 |
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Pros as well as cons of Nd2Fe14B magnets.
Benefits
- They have unchanged lifting capacity, and over around 10 years their performance decreases symbolically – ~1% (in testing),
- Neodymium magnets are distinguished by exceptionally resistant to demagnetization caused by external interference,
- By using a lustrous coating of gold, the element acquires an professional look,
- They show high magnetic induction at the operating surface, which improves attraction properties,
- Thanks to resistance to high temperature, they can operate (depending on the shape) even at temperatures up to 230°C and higher...
- Possibility of precise shaping and modifying to precise needs,
- Wide application in modern technologies – they are utilized in HDD drives, electromotive mechanisms, precision medical tools, as well as multitasking production systems.
- Compactness – despite small sizes they generate large force, making them ideal for precision applications
Limitations
- To avoid cracks upon strong impacts, we suggest using special steel housings. Such a solution secures the magnet and simultaneously increases its durability.
- Neodymium magnets decrease their force 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 durability even at temperatures up to 230°C
- They oxidize in a humid environment - during use outdoors we recommend using waterproof magnets e.g. in rubber, plastic
- We recommend a housing - magnetic mechanism, due to difficulties in creating nuts inside the magnet and complicated forms.
- Potential hazard to health – tiny shards of magnets are risky, if swallowed, which becomes key in the aspect of protecting the youngest. Furthermore, small elements of these products can disrupt the diagnostic process medical when they are in the body.
- Due to complex production process, their price exceeds standard values,
Pull force analysis
Optimal lifting capacity of a neodymium magnet – what affects it?
- with the contact of a sheet made of low-carbon steel, ensuring maximum field concentration
- possessing a thickness of at least 10 mm to ensure full flux closure
- characterized by lack of roughness
- without any air gap between the magnet and steel
- during detachment in a direction vertical to the plane
- at temperature room level
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 decrease in force by up to 50% (this also applies to varnish, rust or debris).
- Pull-off angle – note that the magnet has greatest strength perpendicularly. Under shear forces, the holding force drops significantly, often to levels of 20-30% of the maximum value.
- Steel thickness – too thin steel does not close the flux, causing part of the power to be escaped to the other side.
- Material composition – different alloys reacts the same. High carbon content worsen the interaction with the magnet.
- Base smoothness – the smoother and more polished the plate, the larger the contact zone and stronger the hold. Roughness creates an air distance.
- Heat – NdFeB sinters have a negative temperature coefficient. When it is hot they are weaker, and at low temperatures gain strength (up to a certain limit).
Holding force was checked on the plate surface of 20 mm thickness, when a perpendicular force was applied, whereas 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
Do not drill into magnets
Fire hazard: Rare earth powder is explosive. Do not process magnets without safety gear as this risks ignition.
Impact on smartphones
A strong magnetic field negatively affects the functioning of compasses in smartphones and GPS navigation. Do not bring magnets near a device to prevent breaking the sensors.
Protective goggles
NdFeB magnets are sintered ceramics, meaning they are fragile like glass. Clashing of two magnets leads to them shattering into small pieces.
Hand protection
Watch your fingers. Two powerful magnets will join instantly with a force of several hundred kilograms, destroying everything in their path. Exercise extreme caution!
Demagnetization risk
Regular neodymium magnets (N-type) undergo demagnetization when the temperature goes above 80°C. Damage is permanent.
Handling guide
Before use, check safety instructions. Uncontrolled attraction can break the magnet or hurt your hand. Think ahead.
Danger to pacemakers
For implant holders: Strong magnetic fields disrupt electronics. Keep at least 30 cm distance or request help to handle the magnets.
Avoid contact if allergic
Studies show that the nickel plating (the usual finish) is a potent allergen. If you have an allergy, refrain from touching magnets with bare hands and choose coated magnets.
Danger to the youngest
NdFeB magnets are not suitable for play. Swallowing several magnets may result in them connecting inside the digestive tract, which poses a critical condition and requires urgent medical intervention.
Cards and drives
Data protection: Strong magnets can ruin data carriers and sensitive devices (pacemakers, medical aids, timepieces).
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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