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SM 25x100 [2xM8] / N42 - magnetic separator
magnetic separator
Catalog no 130287
GTIN/EAN: 5906301812807
Diameter Ø
25 mm [±1 mm]
Height
100 mm [±1 mm]
Weight
360 g
Magnetic Flux
~ 6 500 Gauss [±5%]
332.10 ZŁ with VAT / pcs + price for transport
270.00 ZŁ net + 23% VAT / pcs
bulk discounts:
Need more?Engineering report for this magnet
Full PDF analysis: pull and shear force, effect of distance, temperature and plate thickness, safety distances and the demagnetization curve.
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Physical properties - SM 25x100 [2xM8] / N42 - magnetic separator
Specification / characteristics - SM 25x100 [2xM8] / N42 - magnetic separator
| properties | values |
|---|---|
| Cat. no. | 130287 |
| GTIN/EAN | 5906301812807 |
| Production/Distribution | Dhit sp. z o.o. |
| Country of origin | Poland / China / Germany |
| Customs code | 85059029 |
| Diameter Ø | 25 mm [±1 mm] |
| Height | 100 mm [±1 mm] |
| Weight | 360 g |
| Material Type | Stainless steel AISI 304 / A2 |
| Magnetic Flux | ~ 6 500 Gauss [±5%] |
| Size/Mount Quantity | 2xM8 |
| Polarity | circumferential - 3 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 25x100 [2xM8] / N42
| Parameter | Value | Description / Unit |
|---|---|---|
| Diameter (Ø) | 25 | mm |
| Total length | 100 | mm (L) |
| Active length | 64 | mm |
| Section count | 2 | modules |
| Dead zone | 36 | mm (2x 18mm starter) |
| Weight (est.) | ~373 | g |
| Active area | 50 | 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 (2 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% |
Environmental data
| recyclability (EoL) | 100% |
| recycled raw materials | ~10% (pre-cons) |
| carbon footprint | low / zredukowany |
| waste code (EWC) | 16 02 16 |
See also products
![UMH 60x15x69 [M8] / N38 - magnetic holder with hook](https://cdn3.dhit.pl/graphics/products/umh-60x15x69-m8-nij.jpg "UMH 60x15x69 [M8] / N38 - magnetic holder with hook")
![UMGW 36x18x8 [M8] GW / N38 - magnetic holder internal thread](https://cdn3.dhit.pl/graphics/products/um-36x18x8-m8-gw-foj.jpg "UMGW 36x18x8 [M8] GW / N38 - magnetic holder internal thread")
Strengths as well as weaknesses of Nd2Fe14B magnets.
Strengths
- They do not lose power, even during nearly ten years – the reduction in strength is only ~1% (based on measurements),
- Magnets very well resist against demagnetization caused by external fields,
- A magnet with a smooth nickel surface has an effective appearance,
- They are known for high magnetic induction at the operating surface, which improves attraction properties,
- Made from properly selected components, these magnets show impressive resistance to high heat, enabling them to function (depending on their form) at temperatures up to 230°C and above...
- Considering the option of precise molding and customization to individualized solutions, magnetic components can be modeled in a variety of shapes and sizes, which expands the range of possible applications,
- Huge importance in electronics industry – they find application in computer drives, electric drive systems, diagnostic systems, as well as industrial machines.
- Compactness – despite small sizes they generate large force, making them ideal for precision applications
Limitations
- Brittleness is one of their disadvantages. Upon strong impact they can break. We recommend keeping them in a strong case, which not only secures them against impacts but also raises their durability
- Neodymium magnets decrease 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 recommend using waterproof magnets e.g. in rubber, plastic
- We suggest cover - magnetic mechanism, due to difficulties in realizing nuts inside the magnet and complex shapes.
- Health risk resulting from small fragments of magnets can be dangerous, if swallowed, which becomes key in the aspect of protecting the youngest. Additionally, small components of these devices are able to be problematic in diagnostics medical in case of swallowing.
- Due to neodymium price, their price is higher than average,
Pull force analysis
Optimal lifting capacity of a neodymium magnet – what contributes to it?
- using a sheet made of high-permeability steel, acting as a ideal flux conductor
- with a thickness no less than 10 mm
- with a surface perfectly flat
- under conditions of no distance (metal-to-metal)
- for force applied at a right angle (in the magnet axis)
- at standard ambient temperature
Key elements affecting lifting force
- Gap (betwixt the magnet and the metal), because even a tiny distance (e.g. 0.5 mm) can cause a decrease in lifting capacity by up to 50% (this also applies to varnish, corrosion or debris).
- Pull-off angle – note that the magnet has greatest strength perpendicularly. Under sliding down, the holding force drops significantly, often to levels of 20-30% of the nominal value.
- Element thickness – for full efficiency, the steel must be sufficiently thick. Paper-thin metal limits the lifting capacity (the magnet "punches through" it).
- Material type – the best choice is pure iron steel. Stainless steels may attract less.
- Surface finish – full contact is possible only on polished steel. Any scratches and bumps create air cushions, weakening the magnet.
- Thermal environment – temperature increase results in weakening of induction. It is worth remembering the thermal limit for a given model.
Lifting capacity was measured using a steel plate with a smooth surface of optimal thickness (min. 20 mm), under perpendicular pulling force, however under shearing force the load capacity is reduced by as much as 5 times. In addition, even a slight gap between the magnet and the plate decreases the load capacity.
H&S for magnets
Risk of cracking
Neodymium magnets are ceramic materials, meaning they are prone to chipping. Impact of two magnets will cause them cracking into small pieces.
Heat warning
Standard neodymium magnets (grade N) undergo demagnetization when the temperature surpasses 80°C. The loss of strength is permanent.
Combustion hazard
Fire hazard: Neodymium dust is highly flammable. Do not process magnets without safety gear as this may cause fire.
Medical implants
Health Alert: Strong magnets can deactivate heart devices and defibrillators. Stay away if you have medical devices.
Electronic devices
Device Safety: Neodymium magnets can damage data carriers and sensitive devices (pacemakers, hearing aids, mechanical watches).
Impact on smartphones
A strong magnetic field negatively affects the functioning of compasses in phones and navigation systems. Do not bring magnets near a device to prevent breaking the sensors.
Immense force
Before starting, read the rules. Sudden snapping can destroy the magnet or injure your hand. Think ahead.
Avoid contact if allergic
Warning for allergy sufferers: The nickel-copper-nickel coating consists of nickel. If an allergic reaction occurs, immediately stop working with magnets and use protective gear.
Product not for children
NdFeB magnets are not toys. Swallowing a few magnets can lead to them pinching intestinal walls, which constitutes a severe health hazard and necessitates urgent medical intervention.
Crushing force
Risk of injury: The attraction force is so immense that it can cause blood blisters, pinching, and broken bones. Protective gloves are recommended.
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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