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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
bulk discounts:
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Technical of the product - 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
Chemical composition
| 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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Pros and cons of rare earth magnets.
Strengths
- They retain full power for almost 10 years – the drop is just ~1% (in theory),
- Magnets perfectly resist against loss of magnetization caused by foreign field sources,
- A magnet with a metallic gold surface looks better,
- Magnets are characterized by exceptionally strong magnetic induction on the surface,
- Thanks to resistance to high temperature, they are able to function (depending on the form) even at temperatures up to 230°C and higher...
- Possibility of individual shaping as well as adjusting to concrete applications,
- Versatile presence in high-tech industry – they are commonly used in data components, electric motors, medical devices, also other advanced devices.
- Compactness – despite small sizes they provide effective action, making them ideal for precision applications
Limitations
- At strong impacts they can crack, therefore we recommend placing them in steel cases. A metal housing provides additional protection against damage, as well as increases the magnet's durability.
- Neodymium magnets lose their power under the influence of heating. As soon as 80°C is exceeded, many of them start losing their power. 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 suggest using waterproof magnets e.g. in rubber, plastic
- Due to limitations in producing nuts and complex shapes in magnets, we propose using casing - magnetic mechanism.
- Potential hazard resulting from small fragments of magnets pose a threat, when accidentally swallowed, which becomes key in the context of child health protection. Furthermore, small elements of these magnets can disrupt the diagnostic process medical in case of swallowing.
- Higher cost of purchase is a significant factor to consider compared to ceramic magnets, especially in budget applications
Lifting parameters
Maximum magnetic pulling force – what affects it?
- with the contact of a yoke made of special test steel, ensuring full magnetic saturation
- with a thickness minimum 10 mm
- with an polished touching surface
- without the slightest air gap between the magnet and steel
- during pulling in a direction vertical to the plane
- at conditions approx. 20°C
Lifting capacity in practice – influencing factors
- Distance – the presence of foreign body (paint, dirt, gap) acts as an insulator, which lowers capacity rapidly (even by 50% at 0.5 mm).
- Force direction – note that the magnet has greatest strength perpendicularly. Under sliding down, the holding force drops significantly, often to levels of 20-30% of the maximum value.
- Plate thickness – too thin sheet does not close the flux, causing part of the power to be lost to the other side.
- Metal type – not every steel reacts the same. High carbon content worsen the attraction effect.
- Surface condition – smooth surfaces ensure maximum contact, which improves field saturation. Uneven metal weaken the grip.
- Operating temperature – NdFeB sinters have a negative temperature coefficient. At higher temperatures they are weaker, and in frost gain strength (up to a certain limit).
Lifting capacity was measured with the use of a steel plate with a smooth surface of optimal thickness (min. 20 mm), under perpendicular pulling force, whereas under parallel forces the holding force is lower. In addition, even a slight gap between the magnet’s surface and the plate reduces the load capacity.
Safety rules for work with NdFeB magnets
Threat to electronics
Data protection: Neodymium magnets can ruin data carriers and sensitive devices (heart implants, medical aids, mechanical watches).
Magnet fragility
Despite metallic appearance, neodymium is delicate and not impact-resistant. Avoid impacts, as the magnet may shatter into sharp, dangerous pieces.
Danger to the youngest
Absolutely store magnets out of reach of children. Choking hazard is high, and the effects of magnets connecting inside the body are life-threatening.
Thermal limits
Regular neodymium magnets (grade N) undergo demagnetization when the temperature surpasses 80°C. The loss of strength is permanent.
Fire warning
Mechanical processing of NdFeB material poses a fire hazard. Magnetic powder reacts violently with oxygen and is difficult to extinguish.
Keep away from electronics
An intense magnetic field negatively affects the operation of compasses in smartphones and GPS navigation. Keep magnets near a smartphone to prevent breaking the sensors.
Health Danger
Warning for patients: Powerful magnets affect medical devices. Keep at least 30 cm distance or ask another person to work with the magnets.
Metal Allergy
Some people experience a contact allergy to Ni, which is the standard coating for NdFeB magnets. Extended handling may cause an allergic reaction. We suggest wear protective gloves.
Safe operation
Before starting, read the rules. Uncontrolled attraction can break the magnet or hurt your hand. Be predictive.
Physical harm
Big blocks can crush fingers instantly. Under no circumstances place your hand betwixt two attracting surfaces.
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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