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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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Physical properties - 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% |
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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Advantages as well as disadvantages of neodymium magnets.
Strengths
- They have stable power, and over nearly 10 years their attraction force decreases symbolically – ~1% (in testing),
- They possess excellent resistance to magnetic field loss when exposed to external magnetic sources,
- In other words, due to the glossy finish of nickel, the element is aesthetically pleasing,
- The surface of neodymium magnets generates a unique magnetic field – this is one of their assets,
- Thanks to resistance to high temperature, they are able to function (depending on the form) even at temperatures up to 230°C and higher...
- Thanks to versatility in designing and the ability to adapt to client solutions,
- Universal use in innovative solutions – they are commonly used in magnetic memories, electric motors, advanced medical instruments, and multitasking production systems.
- Thanks to concentrated force, small magnets offer high operating force, in miniature format,
Disadvantages
- Susceptibility to cracking is one of their disadvantages. Upon strong impact they can fracture. We advise keeping them in a special holder, which not only secures them against impacts but also raises their durability
- When exposed to high temperature, neodymium magnets experience a drop in force. Often, when the temperature exceeds 80°C, their power 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
- Due to the susceptibility of magnets to corrosion in a humid environment, we advise using waterproof magnets made of rubber, plastic or other material stable to moisture, in case of application outdoors
- Due to limitations in creating threads and complicated shapes in magnets, we recommend using cover - magnetic mechanism.
- Health risk related to microscopic parts of magnets pose a threat, in case of ingestion, which becomes key in the aspect of protecting the youngest. It is also worth noting that small elements of these magnets are able to complicate diagnosis medical when they are in the body.
- High unit price – neodymium magnets are more expensive than other types of magnets (e.g. ferrite), which can limit application in large quantities
Pull force analysis
Highest magnetic holding force – what it depends on?
- on a base made of mild steel, optimally conducting the magnetic flux
- possessing a thickness of at least 10 mm to avoid saturation
- characterized by smoothness
- under conditions of no distance (surface-to-surface)
- during detachment in a direction vertical to the mounting surface
- in stable room temperature
Determinants of practical lifting force of a magnet
- Distance (between the magnet and the metal), as even a tiny distance (e.g. 0.5 mm) results in a drastic drop in force by up to 50% (this also applies to varnish, rust or dirt).
- Direction of force – maximum parameter is available only during pulling at a 90° angle. The resistance to sliding of the magnet along the plate is typically many times lower (approx. 1/5 of the lifting capacity).
- Substrate thickness – for full efficiency, the steel must be sufficiently thick. Thin sheet restricts the lifting capacity (the magnet "punches through" it).
- Steel grade – the best choice is high-permeability steel. Cast iron may attract less.
- Smoothness – full contact is obtained only on polished steel. Any scratches and bumps create air cushions, weakening the magnet.
- Thermal factor – high temperature weakens pulling force. Too high temperature can permanently damage the magnet.
Lifting capacity was determined using a steel plate with a smooth surface of suitable thickness (min. 20 mm), under perpendicular pulling force, whereas under shearing force the lifting capacity is smaller. Moreover, even a small distance between the magnet’s surface and the plate lowers the lifting capacity.
Precautions when working with NdFeB magnets
Life threat
Individuals with a heart stimulator have to keep an safe separation from magnets. The magnetic field can stop the operation of the life-saving device.
Demagnetization risk
Control the heat. Heating the magnet above 80 degrees Celsius will ruin its properties and pulling force.
Serious injuries
Pinching hazard: The pulling power is so great that it can result in blood blisters, pinching, and even bone fractures. Use thick gloves.
Precision electronics
Navigation devices and mobile phones are highly sensitive to magnetism. Close proximity with a strong magnet can decalibrate the sensors in your phone.
Metal Allergy
It is widely known that the nickel plating (the usual finish) is a potent allergen. If your skin reacts to metals, avoid direct skin contact or choose versions in plastic housing.
Electronic devices
Do not bring magnets close to a purse, laptop, or TV. The magnetic field can destroy these devices and wipe information from cards.
Mechanical processing
Machining of neodymium magnets poses a fire risk. Neodymium dust oxidizes rapidly with oxygen and is hard to extinguish.
Handling rules
Before use, check safety instructions. Uncontrolled attraction can destroy the magnet or injure your hand. Think ahead.
This is not a toy
Neodymium magnets are not suitable for play. Eating several magnets can lead to them attracting across intestines, which poses a direct threat to life and requires urgent medical intervention.
Fragile material
Despite the nickel coating, the material is delicate and cannot withstand shocks. Do not hit, as the magnet may shatter into sharp, dangerous pieces.
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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