![Magnetic bar SM 25x100 [2xM8] / N42](https://cdn3.dhit.pl/graphics/banners/magnet.webp "Magnetic bar SM 25x100 [2xM8] / N42")
![SM 25x100 [2xM8] / N42 - magnetic separator](https://cdn3.dhit.pl/graphics/products/sm-25x100-2xm8-feg.jpg)
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%]
246.00 ZŁ with VAT / pcs + price for transport
200.00 ZŁ net + 23% VAT / pcs
bulk discounts:
Need more?
Pick up the phone and ask
+48 22 499 98 98
alternatively drop us a message by means of
our online form
through our site.
Strength as well as structure of neodymium magnets can be tested with our
magnetic calculator.
Orders submitted before 14:00 will be dispatched today!
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
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% |
Sustainability
| recyclability (EoL) | 100% |
| recycled raw materials | ~10% (pre-cons) |
| carbon footprint | low / zredukowany |
| waste code (EWC) | 16 02 16 |
Other offers
![UMGZ 25x17x8 [M5] GZ / N38 - magnetic holder external thread](https://cdn3.dhit.pl/graphics/products/um-25x17x8-m5-gz-keb.jpg "UMGZ 25x17x8 [M5] GZ / N38 - magnetic holder external thread")
![UMGGZ 66x8.5 [M8] GZ / N38 - rubber magnetic holder external thread](https://cdn3.dhit.pl/graphics/products/umggz-66x8.5-m6-gz-gas.jpg "UMGGZ 66x8.5 [M8] GZ / N38 - rubber magnetic holder external thread")
Advantages as well as disadvantages of rare earth magnets.
Benefits
- They virtually do not lose strength, because even after ten years the decline in efficiency is only ~1% (in laboratory conditions),
- They maintain their magnetic properties even under external field action,
- Thanks to the smooth finish, the coating of Ni-Cu-Ni, gold-plated, or silver gives an professional 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...
- Due to the option of precise shaping and adaptation to unique needs, NdFeB magnets can be created in a wide range of geometric configurations, which amplifies use scope,
- Fundamental importance in modern industrial fields – they serve a role in HDD drives, drive modules, medical equipment, and technologically advanced constructions.
- Compactness – despite small sizes they generate large force, making them ideal for precision applications
Cons
- Susceptibility to cracking is one of their disadvantages. Upon strong impact they can fracture. We advise keeping them in a strong case, which not only protects them against impacts but also raises their durability
- Neodymium magnets lose force when exposed to high temperatures. After reaching 80°C, many of them experience permanent drop of power (a factor is the shape as well as dimensions of the magnet). We offer magnets specially adapted to work at temperatures up to 230°C marked [AH], which are very resistant to heat
- They rust in a humid environment. For use outdoors we advise using waterproof magnets e.g. in rubber, plastic
- Limited possibility of creating nuts in the magnet and complex shapes - preferred is cover - mounting mechanism.
- Potential hazard resulting from small fragments of magnets can be dangerous, if swallowed, which is particularly important in the context of child health protection. It is also worth noting that small components of these devices can be problematic in diagnostics medical in case of swallowing.
- Due to neodymium price, their price exceeds standard values,
Holding force characteristics
Maximum lifting force for a neodymium magnet – what contributes to it?
- with the contact of a sheet made of low-carbon steel, guaranteeing maximum field concentration
- whose thickness is min. 10 mm
- characterized by lack of roughness
- with total lack of distance (without coatings)
- for force acting at a right angle (pull-off, not shear)
- at conditions approx. 20°C
Practical lifting capacity: influencing factors
- Distance – the presence of foreign body (paint, tape, gap) interrupts the magnetic circuit, which reduces power steeply (even by 50% at 0.5 mm).
- Pull-off angle – note that the magnet holds strongest perpendicularly. Under sliding down, the holding force drops significantly, often to levels of 20-30% of the maximum value.
- Substrate thickness – for full efficiency, the steel must be adequately massive. Thin sheet limits the attraction force (the magnet "punches through" it).
- Metal type – not every steel reacts the same. Alloy additives worsen the attraction effect.
- Smoothness – full contact is obtained only on polished steel. Rough texture reduce the real contact area, weakening the magnet.
- Temperature – temperature increase causes a temporary drop of induction. It is worth remembering the maximum operating temperature for a given model.
Lifting capacity was measured using a smooth steel plate of optimal thickness (min. 20 mm), under perpendicular detachment force, however under shearing force the lifting capacity is smaller. Moreover, even a minimal clearance between the magnet and the plate lowers the lifting capacity.
Warnings
Life threat
Warning for patients: Powerful magnets disrupt electronics. Keep minimum 30 cm distance or ask another person to handle the magnets.
Pinching danger
Danger of trauma: The attraction force is so great that it can cause hematomas, pinching, and even bone fractures. Protective gloves are recommended.
Do not drill into magnets
Combustion risk: Neodymium dust is highly flammable. Avoid machining magnets in home conditions as this risks ignition.
Magnetic media
Data protection: Strong magnets can damage payment cards and delicate electronics (heart implants, medical aids, timepieces).
Powerful field
Handle magnets with awareness. Their huge power can surprise even experienced users. Be vigilant and do not underestimate their power.
Avoid contact if allergic
Allergy Notice: The Ni-Cu-Ni coating consists of nickel. If skin irritation occurs, cease working with magnets and use protective gear.
Material brittleness
Neodymium magnets are ceramic materials, meaning they are prone to chipping. Collision of two magnets will cause them shattering into small pieces.
Precision electronics
GPS units and smartphones are highly sensitive to magnetic fields. Close proximity with a strong magnet can ruin the internal compass in your phone.
Swallowing risk
NdFeB magnets are not suitable for play. Accidental ingestion of several magnets may result in them pinching intestinal walls, which poses a direct threat to life and necessitates immediate surgery.
Operating temperature
Regular neodymium magnets (N-type) lose magnetization when the temperature surpasses 80°C. This process is irreversible.
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
Rate the product
Your rating