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SM 25x225 [2xM8] / N52 - magnetic separator

magnetic separator

Catalog no 130354

GTIN/EAN: 5906301813026

5.00

Diameter Ø

25 mm [±1 mm]

Height

225 mm [±1 mm]

Weight

0.01 g

Magnetic Flux

~ 9 500 Gauss [±5%]

688.80 with VAT / pcs + price for transport

560.00 ZŁ net + 23% VAT / pcs

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Technical details - SM 25x225 [2xM8] / N52 - magnetic separator

Specification / characteristics - SM 25x225 [2xM8] / N52 - magnetic separator

properties
properties values
Cat. no. 130354
GTIN/EAN 5906301813026
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 225 mm [±1 mm]
Weight 0.01 g
Material Type Stainless steel AISI 304 / A2
Magnetic Flux ~ 9 500 Gauss [±5%]
Size/Mount Quantity 2xM8
Polarity circumferential - 8 poles
Casing Tube Thickness 1 mm
Manufacturing Tolerance ±1 mm

Magnetic properties of material N52

Specification / characteristics SM 25x225 [2xM8] / N52 - magnetic separator
properties values units
remenance Br [min. - max.] ? 14.2-14.7 kGs
remenance Br [min. - max.] ? 1420-1470 mT
coercivity bHc ? 10.8-12.5 kOe
coercivity bHc ? 860-995 kA/m
actual internal force iHc ≥ 12 kOe
actual internal force iHc ≥ 955 kA/m
energy density [min. - max.] ? 48-53 BH max MGOe
energy density [min. - max.] ? 380-422 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
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
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: 130354-2025
Magnet Unit Converter
Pulling force

Field Strength

See 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. Thanks to the use of strong neodymium magnets, the rod catches even metallic dust.
The construction relies on a sealed, welded stainless steel housing, polished smooth. The center is filled with NdFeB magnets and pole pieces, arranged to maximize the field on the tube surface. Such construction ensures full resistance to corrosion, water, oils, and acids.
Metal filings stick to the surface very strongly, so cleaning requires strength or cleverness. 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.
Magnetic induction measured in Gauss (Gs) determines the density of magnetic flux on the rod surface. 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.
Yes, as a manufacturer, we make rods of any length and diameter (standard is dia 25mm and 32mm). We offer various tip options: threaded holes (e.g., M8, M10), protruding screws, flat pivots, mills, or handles. We ensure fast realization of special orders and technical advice.

Advantages as well as disadvantages of Nd2Fe14B magnets.

Pros

Besides their remarkable field intensity, neodymium magnets offer the following advantages:
  • They do not lose magnetism, even over approximately ten years – the reduction in lifting capacity is only ~1% (according to tests),
  • They are extremely resistant to demagnetization induced by external field influence,
  • Thanks to the glossy finish, the coating of nickel, gold-plated, or silver-plated gives an modern appearance,
  • Magnetic induction on the top side of the magnet is extremely intense,
  • Through (appropriate) combination of ingredients, they can achieve high thermal strength, allowing for operation at temperatures reaching 230°C and above...
  • Thanks to freedom in designing and the capacity to adapt to specific needs,
  • Significant place in advanced technology sectors – they are used in data components, brushless drives, medical equipment, also technologically advanced constructions.
  • Compactness – despite small sizes they provide effective action, making them ideal for precision applications

Disadvantages

Disadvantages of neodymium magnets:
  • Brittleness is one of their disadvantages. Upon intense impact they can break. We recommend keeping them in a special holder, which not only secures them against impacts but also increases their durability
  • Neodymium magnets decrease their force under the influence of heating. As soon as 80°C is exceeded, many of them start losing their force. Therefore, we recommend our special magnets marked [AH], which maintain durability even at temperatures up to 230°C
  • Magnets exposed to a humid environment can corrode. Therefore while using outdoors, we recommend using water-impermeable magnets made of rubber, plastic or other material resistant to moisture
  • Limited possibility of producing nuts in the magnet and complicated forms - recommended is a housing - mounting mechanism.
  • Possible danger to health – tiny shards of magnets pose a threat, if swallowed, which becomes key in the context of child health protection. Furthermore, small elements of these devices are able to disrupt the diagnostic process medical when they are in the body.
  • Due to neodymium price, their price exceeds standard values,

Holding force characteristics

Breakaway strength of the magnet in ideal conditionswhat contributes to it?

Holding force of 0.00 kg is a measurement result performed under standard conditions:
  • on a plate made of structural steel, optimally conducting the magnetic flux
  • possessing a thickness of minimum 10 mm to avoid saturation
  • with an polished touching surface
  • with direct contact (no coatings)
  • during pulling in a direction vertical to the mounting surface
  • in stable room temperature

Practical lifting capacity: influencing factors

In practice, the real power is determined by many variables, ranked from the most important:
  • Gap (betwixt the magnet and the metal), as even a microscopic distance (e.g. 0.5 mm) leads to a decrease in force by up to 50% (this also applies to paint, rust or debris).
  • Loading method – catalog parameter refers to detachment vertically. When applying parallel force, the magnet exhibits significantly lower power (often approx. 20-30% of nominal force).
  • Element thickness – for full efficiency, the steel must be adequately massive. Thin sheet restricts the attraction force (the magnet "punches through" it).
  • Material type – ideal substrate is pure iron steel. Stainless steels may generate lower lifting capacity.
  • Surface quality – the smoother and more polished the plate, the better the adhesion and stronger the hold. Unevenness acts like micro-gaps.
  • Thermal factor – high temperature weakens pulling force. Too high temperature can permanently damage the magnet.

Holding force was tested on a smooth steel plate of 20 mm thickness, when the force acted perpendicularly, however under shearing force the lifting capacity is smaller. Additionally, even a slight gap between the magnet and the plate decreases the load capacity.

Warnings
Avoid contact if allergic

Allergy Notice: The nickel-copper-nickel coating contains nickel. If skin irritation occurs, immediately stop handling magnets and wear gloves.

Dust explosion hazard

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

Demagnetization risk

Control the heat. Exposing the magnet to high heat will destroy its properties and pulling force.

Medical implants

For implant holders: Powerful magnets disrupt medical devices. Keep minimum 30 cm distance or ask another person to work with the magnets.

Swallowing risk

These products are not intended for children. Accidental ingestion of multiple magnets can lead to them attracting across intestines, which poses a severe health hazard and requires urgent medical intervention.

Crushing risk

Big blocks can break fingers in a fraction of a second. Do not place your hand between two attracting surfaces.

GPS and phone interference

Be aware: neodymium magnets produce a field that disrupts precision electronics. Maintain a separation from your mobile, tablet, and navigation systems.

Safe operation

Before starting, check safety instructions. Sudden snapping can destroy the magnet or hurt your hand. Think ahead.

Electronic devices

Do not bring magnets close to a wallet, laptop, or TV. The magnetic field can irreversibly ruin these devices and erase data from cards.

Material brittleness

Watch out for shards. Magnets can fracture upon uncontrolled impact, launching sharp fragments into the air. We recommend safety glasses.

Warning! Details about hazards in the article: Safety of working with magnets.
Dhit sp. z o.o.

e-mail: bok@dhit.pl

tel: +48 888 99 98 98