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SM 25x125 [2xM8] / N42 - magnetic separator
magnetic separator
Catalog no 130288
GTIN/EAN: 5906301812814
Diameter Ø
25 mm [±1 mm]
Height
125 mm [±1 mm]
Weight
460 g
Magnetic Flux
~ 6 500 Gauss [±5%]
319.80 ZŁ with VAT / pcs + price for transport
260.00 ZŁ net + 23% VAT / pcs
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Specifications and appearance of a neodymium magnet can be tested using our
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Detailed specification - SM 25x125 [2xM8] / N42 - magnetic separator
Specification / characteristics - SM 25x125 [2xM8] / N42 - magnetic separator
| properties | values |
|---|---|
| Cat. no. | 130288 |
| GTIN/EAN | 5906301812814 |
| Production/Distribution | Dhit sp. z o.o. |
| Country of origin | Poland / China / Germany |
| Customs code | 85059029 |
| Diameter Ø | 25 mm [±1 mm] |
| Height | 125 mm [±1 mm] |
| Weight | 460 g |
| Material Type | Stainless steel AISI 304 / A2 |
| Magnetic Flux | ~ 6 500 Gauss [±5%] |
| Size/Mount Quantity | 2xM8 |
| Polarity | circumferential - 4 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 25x125 [2xM8] / N42
| Parameter | Value | Description / Unit |
|---|---|---|
| Diameter (Ø) | 25 | mm |
| Total length | 125 | mm (L) |
| Active length | 89 | mm |
| Section count | 3 | modules |
| Dead zone | 36 | mm (2x 18mm starter) |
| Weight (est.) | ~466 | g |
| Active area | 70 | 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 (3 sections)
Chart 3: Temperature performance
Elemental analysis
| 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 |
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Advantages as well as disadvantages of neodymium magnets.
Strengths
- They retain attractive force for around 10 years – the drop is just ~1% (according to analyses),
- They show high resistance to demagnetization induced by presence of other magnetic fields,
- Thanks to the shiny finish, the layer of Ni-Cu-Ni, gold, or silver-plated gives an clean appearance,
- Magnetic induction on the working part of the magnet remains strong,
- 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...
- Possibility of custom machining and adapting to atypical requirements,
- Universal use in electronics industry – they find application in hard drives, drive modules, advanced medical instruments, as well as industrial machines.
- Compactness – despite small sizes they offer powerful magnetic field, making them ideal for precision applications
Limitations
- Brittleness is one of their disadvantages. Upon intense impact they can break. We advise keeping them in a strong case, which not only protects them against impacts but also raises their durability
- When exposed to high temperature, neodymium magnets experience a drop in power. Often, when the temperature exceeds 80°C, their power decreases (depending on the size and shape of the magnet). For those who need magnets for extreme conditions, we offer [AH] versions withstanding up to 230°C
- When exposed to humidity, magnets start to rust. For applications outside, it is recommended to use protective magnets, such as those in rubber or plastics, which prevent oxidation as well as corrosion.
- Limited ability of producing nuts in the magnet and complicated forms - recommended is a housing - mounting mechanism.
- Potential hazard to health – tiny shards of magnets are risky, in case of ingestion, which is particularly important in the context of child safety. Furthermore, small elements of these magnets can disrupt the diagnostic process medical after entering the body.
- Higher cost of purchase is a significant factor to consider compared to ceramic magnets, especially in budget applications
Pull force analysis
Maximum magnetic pulling force – what it depends on?
- on a base made of mild steel, optimally conducting the magnetic field
- possessing a thickness of at least 10 mm to avoid saturation
- with an ground contact surface
- without the slightest air gap between the magnet and steel
- under perpendicular force vector (90-degree angle)
- at ambient temperature approx. 20 degrees Celsius
Practical lifting capacity: influencing factors
- Gap (between the magnet and the metal), since even a microscopic distance (e.g. 0.5 mm) leads to a drastic drop in force by up to 50% (this also applies to varnish, corrosion or dirt).
- Pull-off angle – remember that the magnet has greatest strength perpendicularly. Under shear forces, the capacity drops drastically, often to levels of 20-30% of the nominal value.
- Base massiveness – insufficiently thick steel does not accept the full field, causing part of the power to be lost into the air.
- Material type – ideal substrate is high-permeability steel. Stainless steels may attract less.
- Surface structure – the more even the surface, the larger the contact zone and stronger the hold. Unevenness acts like micro-gaps.
- Temperature – heating the magnet results in weakening of induction. Check the thermal limit for a given model.
Lifting capacity was determined with the use of a smooth steel plate of optimal thickness (min. 20 mm), under perpendicular detachment force, in contrast under shearing force the lifting capacity is smaller. Moreover, even a slight gap between the magnet and the plate lowers the load capacity.
Precautions when working with NdFeB magnets
Power loss in heat
Monitor thermal conditions. Heating the magnet to high heat will ruin its magnetic structure and pulling force.
Cards and drives
Very strong magnetic fields can corrupt files on credit cards, HDDs, and storage devices. Keep a distance of at least 10 cm.
Do not drill into magnets
Mechanical processing of neodymium magnets poses a fire hazard. Neodymium dust oxidizes rapidly with oxygen and is hard to extinguish.
Skin irritation risks
Nickel alert: The nickel-copper-nickel coating consists of nickel. If skin irritation happens, immediately stop handling magnets and use protective gear.
Do not underestimate power
Before use, check safety instructions. Uncontrolled attraction can destroy the magnet or hurt your hand. Think ahead.
Bodily injuries
Risk of injury: The pulling power is so immense that it can result in hematomas, pinching, and broken bones. Protective gloves are recommended.
Eye protection
NdFeB magnets are sintered ceramics, meaning they are fragile like glass. Clashing of two magnets will cause them breaking into shards.
Medical interference
Patients with a heart stimulator must maintain an large gap from magnets. The magnetism can stop the functioning of the life-saving device.
Swallowing risk
Absolutely store magnets out of reach of children. Risk of swallowing is significant, and the consequences of magnets connecting inside the body are fatal.
Phone sensors
Navigation devices and smartphones are extremely susceptible to magnetism. Close proximity with a powerful NdFeB magnet can permanently damage the internal compass in your phone.
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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