SM 32x200 [2xM8] / N42 - magnetic separator
magnetic separator
Catalog no 130298
GTIN: 5906301812913
Diameter Ø
32 mm [±1 mm]
Height
200 mm [±1 mm]
Weight
1070 g
Magnetic Flux
~ 8 000 Gauss [±5%]
602.70 ZŁ with VAT / pcs + price for transport
490.00 ZŁ net + 23% VAT / pcs
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SM 32x200 [2xM8] / N42 - magnetic separator
Specification / characteristics SM 32x200 [2xM8] / N42 - magnetic separator
| properties | values |
|---|---|
| Cat. no. | 130298 |
| GTIN | 5906301812913 |
| Production/Distribution | Dhit sp. z o.o. |
| Country of origin | Poland / China / Germany |
| Customs code | 85059029 |
| Diameter Ø | 32 mm [±1 mm] |
| Height | 200 mm [±1 mm] |
| Weight | 1070 g |
| Material Type | Stainless steel AISI 304 / A2 |
| Magnetic Flux | ~ 8 000 Gauss [±5%] |
| Size/Mount Quantity | 2xM8 |
| Polarity | circumferential - 7 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 | T |
| 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 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 |
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Strengths and weaknesses of rare earth magnets.
In addition to their magnetic capacity, neodymium magnets provide the following advantages:
- They have unchanged lifting capacity, and over more than 10 years their attraction force decreases symbolically – ~1% (according to theory),
- Magnets perfectly defend themselves against demagnetization caused by external fields,
- A magnet with a smooth silver surface has better aesthetics,
- Neodymium magnets generate maximum magnetic induction on a contact point, which increases force concentration,
- Due to their durability and thermal resistance, neodymium magnets are capable of operate (depending on the shape) even at high temperatures reaching 230°C or more...
- Possibility of exact machining as well as optimizing to specific applications,
- Fundamental importance in innovative solutions – they are utilized in HDD drives, electric drive systems, medical devices, also other advanced devices.
- Thanks to efficiency per cm³, small magnets offer high operating force, occupying minimum space,
Disadvantages of neodymium magnets:
- At strong impacts they can break, therefore we advise placing them in strong housings. A metal housing provides additional protection against damage and increases the magnet's durability.
- We warn that neodymium magnets can lose their strength at high temperatures. To prevent this, we recommend our specialized [AH] magnets, which work effectively even at 230°C.
- Due to the susceptibility of magnets to corrosion in a humid environment, we recommend using waterproof magnets made of rubber, plastic or other material stable to moisture, in case of application outdoors
- We suggest casing - magnetic mechanism, due to difficulties in creating threads inside the magnet and complex shapes.
- Possible danger to health – tiny shards of magnets can be dangerous, when accidentally swallowed, which is particularly important in the aspect of protecting the youngest. It is also worth noting that tiny parts of these products can be problematic in diagnostics medical in case of swallowing.
- High unit price – neodymium magnets are more expensive than other types of magnets (e.g. ferrite), which hinders application in large quantities
Maximum lifting capacity of the magnet – what it depends on?
The force parameter is a result of laboratory testing executed under standard conditions:
- on a block made of mild steel, optimally conducting the magnetic flux
- with a thickness of at least 10 mm
- with an ground contact surface
- without any air gap between the magnet and steel
- during pulling in a direction vertical to the plane
- at ambient temperature approx. 20 degrees Celsius
Practical lifting capacity: influencing factors
Bear in mind that the magnet holding will differ depending on elements below, starting with the most relevant:
- Air gap (between the magnet and the plate), because even a tiny distance (e.g. 0.5 mm) leads to a drastic drop in force by up to 50% (this also applies to paint, corrosion or debris).
- Pull-off angle – note that the magnet has greatest strength perpendicularly. Under sliding down, the capacity drops significantly, often to levels of 20-30% of the nominal value.
- Metal thickness – the thinner the sheet, the weaker the hold. Magnetic flux passes through the material instead of converting into lifting capacity.
- Plate material – mild steel gives the best results. Higher carbon content lower magnetic properties and lifting capacity.
- Smoothness – full contact is obtained only on smooth steel. Rough texture reduce the real contact area, reducing force.
- Operating temperature – neodymium magnets have a sensitivity to temperature. At higher temperatures they are weaker, and at low temperatures gain strength (up to a certain limit).
* Lifting capacity testing was conducted on plates with a smooth surface of optimal thickness, under perpendicular forces, in contrast under shearing force the lifting capacity is smaller. Moreover, even a minimal clearance {between} the magnet and the plate reduces the load capacity.
Safety rules for work with NdFeB magnets
Heat sensitivity
Regular neodymium magnets (grade N) lose magnetization when the temperature surpasses 80°C. The loss of strength is permanent.
Health Danger
Medical warning: Neodymium magnets can turn off pacemakers and defibrillators. Stay away if you have medical devices.
Avoid contact if allergic
A percentage of the population suffer from a sensitization to nickel, which is the common plating for NdFeB magnets. Prolonged contact might lead to a rash. It is best to use protective gloves.
No play value
Product intended for adults. Small elements can be swallowed, causing severe trauma. Keep out of reach of kids and pets.
Material brittleness
Despite metallic appearance, neodymium is delicate and cannot withstand shocks. Avoid impacts, as the magnet may shatter into hazardous fragments.
GPS and phone interference
Be aware: rare earth magnets generate a field that disrupts sensitive sensors. Keep a separation from your phone, tablet, and navigation systems.
Bodily injuries
Risk of injury: The pulling power is so great that it can result in hematomas, pinching, and broken bones. Protective gloves are recommended.
Handling guide
Before use, read the rules. Uncontrolled attraction can break the magnet or hurt your hand. Be predictive.
Machining danger
Combustion risk: Rare earth powder is explosive. Do not process magnets in home conditions as this risks ignition.
Magnetic media
Very strong magnetic fields can corrupt files on credit cards, HDDs, and storage devices. Stay away of at least 10 cm.
Important!
Need more info? Read our article: Are neodymium magnets dangerous?
