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
0.01 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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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 | 0.01 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 |
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% |
Environmental data
| recyclability (EoL) | 100% |
| recycled raw materials | ~10% (pre-cons) |
| carbon footprint | low / zredukowany |
| waste code (EWC) | 16 02 16 |
Other deals
Advantages as well as disadvantages of Nd2Fe14B magnets.
Pros
- They do not lose magnetism, even during around 10 years – the reduction in strength is only ~1% (according to tests),
- Neodymium magnets prove to be exceptionally resistant to demagnetization caused by external interference,
- In other words, due to the reflective finish of gold, the element gains a professional look,
- Magnets possess extremely high magnetic induction on the outer layer,
- Thanks to resistance to high temperature, they are capable of working (depending on the shape) even at temperatures up to 230°C and higher...
- Thanks to freedom in forming and the capacity to customize to complex applications,
- Wide application in modern technologies – they are utilized in hard drives, motor assemblies, medical equipment, and modern systems.
- Compactness – despite small sizes they generate large force, making them ideal for precision applications
Disadvantages
- Susceptibility to cracking is one of their disadvantages. Upon intense impact they can break. We advise keeping them in a steel housing, which not only protects them against impacts but also raises their durability
- We warn that neodymium magnets can lose their strength at high temperatures. To prevent this, we advise our specialized [AH] magnets, which work effectively even at 230°C.
- They oxidize in a humid environment. For use outdoors we suggest using waterproof magnets e.g. in rubber, plastic
- Due to limitations in realizing threads and complex forms in magnets, we propose using cover - magnetic mount.
- Health risk related to microscopic parts of magnets are risky, if swallowed, which gains importance in the aspect of protecting the youngest. It is also worth noting that small elements of these magnets can be problematic in diagnostics medical after entering the body.
- With large orders the cost of neodymium magnets is economically unviable,
Pull force analysis
Best holding force of the magnet in ideal parameters – what it depends on?
- using a base made of high-permeability steel, functioning as a ideal flux conductor
- with a cross-section of at least 10 mm
- with an ground contact surface
- without the slightest air gap between the magnet and steel
- under perpendicular force vector (90-degree angle)
- in stable room temperature
What influences lifting capacity in practice
- Clearance – the presence of any layer (paint, dirt, air) acts as an insulator, which reduces capacity rapidly (even by 50% at 0.5 mm).
- Angle of force application – maximum parameter is available only during pulling at a 90° angle. The shear force of the magnet along the plate is standardly many times smaller (approx. 1/5 of the lifting capacity).
- Element thickness – to utilize 100% power, the steel must be sufficiently thick. Paper-thin metal restricts the attraction force (the magnet "punches through" it).
- Metal type – different alloys reacts the same. High carbon content weaken the interaction with the magnet.
- Smoothness – full contact is obtained only on polished steel. Rough texture reduce the real contact area, reducing force.
- Operating temperature – NdFeB sinters have a sensitivity to temperature. At higher temperatures they are weaker, and at low temperatures gain strength (up to a certain limit).
Holding force was measured on the plate surface of 20 mm thickness, when a perpendicular force was applied, however under parallel forces the holding force is lower. Additionally, even a slight gap between the magnet and the plate lowers the load capacity.
No play value
Adult use only. Small elements can be swallowed, causing serious injuries. Keep away from kids and pets.
Magnetic interference
A strong magnetic field interferes with the functioning of magnetometers in phones and navigation systems. Do not bring magnets close to a device to avoid breaking the sensors.
Warning for heart patients
People with a heart stimulator must keep an large gap from magnets. The magnetic field can stop the operation of the implant.
Safe operation
Handle magnets with awareness. Their immense force can shock even experienced users. Plan your moves and respect their power.
Shattering risk
NdFeB magnets are ceramic materials, which means they are very brittle. Impact of two magnets leads to them cracking into small pieces.
Dust explosion hazard
Combustion risk: Rare earth powder is highly flammable. Do not process magnets without safety gear as this may cause fire.
Finger safety
Pinching hazard: The pulling power is so immense that it can cause blood blisters, pinching, and even bone fractures. Use thick gloves.
Threat to electronics
Avoid bringing magnets close to a wallet, laptop, or TV. The magnetic field can destroy these devices and wipe information from cards.
Heat warning
Do not overheat. Neodymium magnets are susceptible to temperature. If you require resistance above 80°C, inquire about HT versions (H, SH, UH).
Sensitization to coating
Studies show that nickel (the usual finish) is a potent allergen. If your skin reacts to metals, avoid direct skin contact or select coated magnets.
