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SM 25x300 [2xM8] / N42 - magnetic separator

magnetic separator

Catalog no 130295

GTIN/EAN: 5906301812883

5.00

Diameter Ø

25 mm [±1 mm]

Height

300 mm [±1 mm]

Weight

0.01 g

Magnetic Flux

~ 6 500 Gauss [±5%]

836.40 with VAT / pcs + price for transport

680.00 ZŁ net + 23% VAT / pcs

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Product card - SM 25x300 [2xM8] / N42 - magnetic separator

Specification / characteristics - SM 25x300 [2xM8] / N42 - magnetic separator

properties
properties values
Cat. no. 130295
GTIN/EAN 5906301812883
Production/Distribution Dhit sp. z o.o.
ul. Zielona 14 05-850 Ożarów Mazowiecki PL
Country of origin Poland / China / Germany
Customs code 85059029
Diameter Ø 25 mm [±1 mm]
Height 300 mm [±1 mm]
Weight 0.01 g
Material Type Stainless steel AISI 304 / A2
Magnetic Flux ~ 6 500 Gauss [±5%]
Size/Mount Quantity 2xM8
Polarity circumferential - 11 poles
Casing Tube Thickness 1 mm
Manufacturing Tolerance ±1 mm

Magnetic properties of material N42

Specification / characteristics SM 25x300 [2xM8] / N42 - magnetic separator
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

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
Engineering data and GPSR
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
Safety card (GPSR)
responsible entity
Dhit sp. z o.o.
ul. Kościuszki 6A, 05-850 Ożarów Mazowiecki
tel: +48 22 499 98 98 | e-mail: bok@dhit.pl
batch number/type
id: 130295-2025
Measurement Calculator
Pulling force

Field Strength

View also proposals

A magnetic rod is the basic element of building grate separators and magnetic filters. Its task is separation (separation) of metal filings from the transported material. High magnetic induction on the surface allows catching the finest iron particles.
The outer layer is hygienic acid-resistant steel, approved for food contact. Inside there is a stack of strong neodymium magnets arranged in a special configuration (magnetic circuit). Such construction ensures full resistance to corrosion, water, oils, and acids.
Due to the high power of the magnet, direct removal of filings can be troublesome and time-consuming. You can use compressed air or special non-magnetic strippers (rings). For easier operation, it is worth considering ordering a rod in a version with a cleaning sleeve.
The Gauss value tells us how effectively and deeply the magnet will catch contaminants. Standard rods (~8000 Gs) are sufficient for catching screws, nails, and steel shavings. High Power versions (~12000-14000 Gs) are necessary for catching metallic dust, oxides, and stainless steel after processing.
We can produce a rod of non-standard length with any mounting termination. You can choose a mounting method consistent with your technical design. We ensure fast realization of special orders and technical advice.

Pros and cons of Nd2Fe14B magnets.

Pros

Besides their durability, neodymium magnets are valued for these benefits:
  • Their power is durable, and after approximately 10 years it decreases only by ~1% (according to research),
  • Magnets effectively resist against demagnetization caused by ambient magnetic noise,
  • Thanks to the shimmering finish, the coating of Ni-Cu-Ni, gold-plated, or silver gives an visually attractive appearance,
  • Magnetic induction on the working part of the magnet is strong,
  • Made from properly selected components, these magnets show impressive resistance to high heat, enabling them to function (depending on their shape) at temperatures up to 230°C and above...
  • Due to the potential of precise molding and customization to specialized projects, NdFeB magnets can be manufactured in a variety of forms and dimensions, which amplifies use scope,
  • Fundamental importance in electronics industry – they are used in data components, electric drive systems, medical equipment, as well as complex engineering applications.
  • Relatively small size with high pulling force – neodymium magnets offer impressive pulling force in tiny dimensions, which makes them useful in small systems

Disadvantages

Cons of neodymium magnets: application proposals
  • Brittleness is one of their disadvantages. Upon strong impact they can break. We recommend keeping them in a special holder, which not only protects them against impacts but also increases their durability
  • When exposed to high temperature, neodymium magnets suffer 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 usually rust. To use them in conditions outside, it is recommended to use protective magnets, such as those in rubber or plastics, which prevent oxidation as well as corrosion.
  • We suggest cover - magnetic holder, due to difficulties in realizing nuts inside the magnet and complex forms.
  • Potential hazard resulting from small fragments of magnets pose a threat, if swallowed, which becomes key in the context of child safety. It is also worth noting that small elements of these products can disrupt the diagnostic process medical after entering the body.
  • Higher cost of purchase is one of the disadvantages compared to ceramic magnets, especially in budget applications

Holding force characteristics

Maximum holding power of the magnet – what contributes to it?

The load parameter shown refers to the peak performance, recorded under optimal environment, namely:
  • on a plate made of structural steel, effectively closing the magnetic field
  • whose transverse dimension equals approx. 10 mm
  • with a surface perfectly flat
  • without the slightest air gap between the magnet and steel
  • for force acting at a right angle (pull-off, not shear)
  • at standard ambient temperature

Lifting capacity in real conditions – factors

In real-world applications, the actual lifting capacity is determined by many variables, ranked from crucial:
  • Distance – the presence of foreign body (rust, dirt, gap) acts as an insulator, which lowers capacity steeply (even by 50% at 0.5 mm).
  • Angle of force application – highest force is reached only during pulling at a 90° angle. The shear force of the magnet along the surface is usually many times lower (approx. 1/5 of the lifting capacity).
  • Plate thickness – insufficiently thick sheet does not close the flux, causing part of the power to be escaped to the other side.
  • Plate material – mild steel gives the best results. Alloy steels reduce magnetic properties and lifting capacity.
  • Smoothness – ideal contact is obtained only on polished steel. Rough texture reduce the real contact area, reducing force.
  • Heat – neodymium magnets have a sensitivity to temperature. When it is hot they lose power, and in frost gain strength (up to a certain limit).

Lifting capacity testing was carried out on plates with a smooth surface of optimal thickness, under a perpendicular pulling force, whereas under parallel forces the lifting capacity is smaller. In addition, even a minimal clearance between the magnet and the plate reduces the lifting capacity.

H&S for magnets
Power loss in heat

Regular neodymium magnets (N-type) lose power when the temperature goes above 80°C. Damage is permanent.

Keep away from electronics

Note: rare earth magnets generate a field that disrupts precision electronics. Keep a safe distance from your phone, device, and navigation systems.

Hand protection

Protect your hands. Two large magnets will join instantly with a force of several hundred kilograms, crushing anything in their path. Exercise extreme caution!

Sensitization to coating

Studies show that nickel (standard magnet coating) is a common allergen. If you have an allergy, prevent direct skin contact and choose encased magnets.

Shattering risk

NdFeB magnets are ceramic materials, meaning they are fragile like glass. Impact of two magnets will cause them breaking into small pieces.

This is not a toy

Strictly store magnets away from children. Choking hazard is significant, and the consequences of magnets connecting inside the body are tragic.

Flammability

Fire warning: Rare earth powder is highly flammable. Avoid machining magnets in home conditions as this may cause fire.

Threat to electronics

Powerful magnetic fields can erase data on credit cards, HDDs, and other magnetic media. Keep a distance of at least 10 cm.

ICD Warning

For implant holders: Powerful magnets disrupt electronics. Keep at least 30 cm distance or request help to handle the magnets.

Do not underestimate power

Use magnets consciously. Their immense force can shock even experienced users. Plan your moves and do not underestimate their force.

Security! Looking for details? Read our article: Why are neodymium magnets dangerous?
Dhit sp. z o.o.

e-mail: bok@dhit.pl

tel: +48 888 99 98 98