SM 25x325 [2xM8] / N52 - magnetic separator
magnetic separator
Catalog no 130370
GTIN: 5906301813187
Diameter Ø
25 mm [±1 mm]
Height
325 mm [±1 mm]
Weight
0.01 g
Magnetic Flux
~ 9 500 Gauss [±5%]
984.00 ZŁ with VAT / pcs + price for transport
800.00 ZŁ net + 23% VAT / pcs
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SM 25x325 [2xM8] / N52 - magnetic separator
Specification / characteristics SM 25x325 [2xM8] / N52 - magnetic separator
| properties | values |
|---|---|
| Cat. no. | 130370 |
| GTIN | 5906301813187 |
| Production/Distribution | Dhit sp. z o.o. |
| Country of origin | Poland / China / Germany |
| Customs code | 85059029 |
| Diameter Ø | 25 mm [±1 mm] |
| Height | 325 mm [±1 mm] |
| Weight | 0.01 g |
| Material Type | Stainless steel AISI 304 / A2 |
| Magnetic Flux | ~ 9 500 Gauss [±5%] |
| Size/Mount Quantity | 2xM8 |
| Polarity | circumferential - 12 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 | T |
| 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 106 | °C-1 |
| Thermal expansion perpendicular (⊥) to orientation (M) | -(1-3) x 10-6 | °C-1 |
| Young's modulus | 1.7 x 104 | kg/mm² |
Other products
Advantages as well as disadvantages of rare earth magnets.
Apart from their notable power, neodymium magnets have these key benefits:
- They retain full power for around 10 years – the loss is just ~1% (in theory),
- They possess excellent resistance to magnetic field loss as a result of external magnetic sources,
- The use of an elegant coating of noble metals (nickel, gold, silver) causes the element to be more visually attractive,
- The surface of neodymium magnets generates a intense magnetic field – this is a key feature,
- Thanks to resistance to high temperature, they can operate (depending on the form) even at temperatures up to 230°C and higher...
- Thanks to flexibility in constructing and the ability to customize to individual projects,
- Versatile presence in modern technologies – they serve a role in hard drives, electromotive mechanisms, medical equipment, and complex engineering applications.
- Relatively small size with high pulling force – neodymium magnets offer impressive pulling force in tiny dimensions, which makes them useful in compact constructions
What to avoid - cons of neodymium magnets and proposals for their use:
- To avoid cracks under impact, we suggest using special steel housings. Such a solution protects the magnet and simultaneously improves its durability.
- We warn that neodymium magnets can reduce their strength at high temperatures. To prevent this, we recommend our specialized [AH] magnets, which work effectively even at 230°C.
- Magnets exposed to a humid environment can corrode. Therefore during using outdoors, we advise using water-impermeable magnets made of rubber, plastic or other material resistant to moisture
- Limited possibility of making nuts in the magnet and complex forms - preferred is casing - magnet mounting.
- Potential hazard related to microscopic parts of magnets can be dangerous, when accidentally swallowed, which becomes key in the aspect of protecting the youngest. It is also worth noting that small components of these products can be problematic in diagnostics medical in case of swallowing.
- Due to complex production process, their price is higher than average,
Optimal lifting capacity of a neodymium magnet – what contributes to it?
Breakaway force was determined for ideal contact conditions, assuming:
- on a block made of mild steel, effectively closing the magnetic field
- whose thickness is min. 10 mm
- characterized by even structure
- without any air gap between the magnet and steel
- for force applied at a right angle (pull-off, not shear)
- at temperature approx. 20 degrees Celsius
Practical aspects of lifting capacity – factors
Bear in mind that the magnet holding will differ depending on the following factors, starting with the most relevant:
- Clearance – existence of foreign body (paint, tape, gap) acts as an insulator, which reduces capacity steeply (even by 50% at 0.5 mm).
- Pull-off angle – remember that the magnet has greatest strength perpendicularly. Under shear forces, the capacity drops significantly, often to levels of 20-30% of the maximum value.
- Element thickness – to utilize 100% power, the steel must be adequately massive. Thin sheet restricts the lifting capacity (the magnet "punches through" it).
- Material composition – different alloys reacts the same. Alloy additives weaken the attraction effect.
- Surface condition – smooth surfaces ensure maximum contact, which improves field saturation. Rough surfaces reduce efficiency.
- Temperature influence – high temperature reduces magnetic field. Exceeding the limit temperature can permanently demagnetize the magnet.
* Lifting capacity testing was carried out on a smooth plate of optimal thickness, under perpendicular forces, whereas under shearing force the holding force is lower. Moreover, even a small distance {between} the magnet’s surface and the plate reduces the lifting capacity.
Safety rules for work with neodymium magnets
Avoid contact if allergic
Nickel alert: The nickel-copper-nickel coating contains nickel. If redness appears, immediately stop working with magnets and use protective gear.
Fire risk
Powder produced during grinding of magnets is combustible. Do not drill into magnets without proper cooling and knowledge.
Swallowing risk
Always store magnets away from children. Risk of swallowing is significant, and the consequences of magnets clamping inside the body are tragic.
Health Danger
For implant holders: Powerful magnets affect medical devices. Keep minimum 30 cm distance or request help to handle the magnets.
Shattering risk
Despite metallic appearance, the material is brittle and not impact-resistant. Avoid impacts, as the magnet may crumble into sharp, dangerous pieces.
Safe operation
Be careful. Neodymium magnets act from a long distance and snap with huge force, often faster than you can move away.
Impact on smartphones
A powerful magnetic field disrupts the operation of compasses in smartphones and navigation systems. Do not bring magnets close to a smartphone to prevent breaking the sensors.
Heat sensitivity
Avoid heat. NdFeB magnets are sensitive to temperature. If you need resistance above 80°C, inquire about special high-temperature series (H, SH, UH).
Data carriers
Data protection: Strong magnets can damage data carriers and delicate electronics (heart implants, medical aids, timepieces).
Physical harm
Watch your fingers. Two large magnets will join instantly with a force of several hundred kilograms, crushing anything in their path. Be careful!
Warning!
Looking for details? Check our post: Are neodymium magnets dangerous?
