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SM 25x400 [2xM8] / N52 - magnetic separator

magnetic separator

Catalog no 130470

GTIN/EAN: 5906301813132

Diameter Ø

25 mm [±1 mm]

Height

400 mm [±1 mm]

Weight

1560 g

Magnetic Flux

~ 8 500 Gauss [±5%]

view parameters »

1205.40 ZŁ with VAT / pcs + price for transport

980.00 ZŁ net + 23% VAT / pcs

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Give us a call +48 22 499 98 98 otherwise drop us a message through request form the contact section.
Specifications and form of neodymium magnets can be reviewed on our power calculator.

Orders placed before 14:00 will be shipped the same business day.

Technical details - SM 25x400 [2xM8] / N52 - magnetic separator

Specification / characteristics - SM 25x400 [2xM8] / N52 - magnetic separator

properties
properties values
Cat. no. 130470
GTIN/EAN 5906301813132
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 400 mm [±1 mm]
Weight 1560 g
Material Type Stainless steel AISI 304 / A2
Magnetic Flux ~ 8 500 Gauss [±5%]
Size/Mount Quantity M8x2
Polarity circumferential - 15 poles
Casing Tube Thickness 1 mm
Manufacturing Tolerance ±1 mm

Magnetic properties of material N52

Specification / characteristics SM 25x400 [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

Table 1: Rod construction
SM 25x400 [2xM8] / N52

Parameter Value Description / Unit
Diameter (Ø) 25 mm
Total length 400 mm (L)
Active length 364 mm
Section count 15 modules
Dead zone 36 mm (2x 18mm starter)
Weight (est.) ~1492 g
Active area 286 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) 18.1 kg (theor.)
Induction (surface) ~8 500 Gauss (Max)
Max T = 80°C. Construction data for M8/M10 thread series.

Chart 2: Field profile (15 sections)

Simulation: 15 magnetic modules (pitch 23 mm).

Chart 3: Temperature performance

Technical specification and ecology
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%
Ecology and recycling (GPSR)
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: 130470-2026
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It is the "heart" of every magnetic filter used in industry for cleaning raw materials. It is commonly used for cleaning flour, sugar, plastic granules, as well as oils and coolants. High magnetic induction on the surface allows catching the finest iron particles.
The outer layer is hygienic acid-resistant steel, approved for food contact. The core is a precise magnetic system generating high induction (Gauss). Thanks to this, the rod is durable, hygienic, and easy to keep clean.
Metal contaminants are strongly attracted, so removing them with a bare hand or glove can be difficult. You can use compressed air or special non-magnetic strippers (rings). In industry, cover tubes (so-called Easy Clean system) are used, from which the magnetic insert slides out.
Magnetic induction measured in Gauss (Gs) determines the density of magnetic flux on the rod surface. For basic machine protection against pieces of iron, standard power is sufficient. 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). The rod end is strictly adapted to the fastening system in your device. Contact us for a quote on a non-standard dimension.

Strengths as well as weaknesses of neodymium magnets.

Pros

In addition to their long-term stability, neodymium magnets provide the following advantages:
  • They have constant strength, and over around ten years their attraction force decreases symbolically – ~1% (according to theory),
  • They retain their magnetic properties even under strong external field,
  • By applying a smooth coating of gold, the element has an modern look,
  • They feature high magnetic induction at the operating surface, making them more effective,
  • Due to their durability and thermal resistance, neodymium magnets are capable of operate (depending on the form) even at high temperatures reaching 230°C or more...
  • Due to the ability of accurate molding and adaptation to unique solutions, neodymium magnets can be created in a broad palette of forms and dimensions, which expands the range of possible applications,
  • Huge importance in modern industrial fields – they are used in magnetic memories, electromotive mechanisms, advanced medical instruments, also multitasking production systems.
  • Compactness – despite small sizes they generate large force, making them ideal for precision applications

Limitations

Problematic aspects of neodymium magnets: tips and applications.
  • To avoid cracks upon strong impacts, we recommend using special steel housings. Such a solution secures the magnet and simultaneously increases its durability.
  • We warn that neodymium magnets can lose their strength at high temperatures. To prevent this, we advise our specialized [AH] magnets, which work effectively even at 230°C.
  • Magnets exposed to a humid environment can corrode. Therefore when using outdoors, we recommend using water-impermeable magnets made of rubber, plastic or other material resistant to moisture
  • We recommend a housing - magnetic mechanism, due to difficulties in realizing nuts inside the magnet and complex shapes.
  • Potential hazard resulting from small fragments of magnets pose a threat, in case of ingestion, which is particularly important in the context of child health protection. Additionally, tiny parts of these devices can be problematic in diagnostics medical after entering the body.
  • Due to complex production process, their price is higher than average,

Holding force characteristics

Maximum lifting force for a neodymium magnet – what it depends on?

Information about lifting capacity was defined for optimal configuration, taking into account:
  • with the application of a sheet made of special test steel, ensuring maximum field concentration
  • possessing a massiveness of min. 10 mm to avoid saturation
  • characterized by even structure
  • under conditions of gap-free contact (metal-to-metal)
  • during pulling in a direction perpendicular to the plane
  • in neutral thermal conditions

Lifting capacity in practice – influencing factors

Real force is affected by working environment parameters, including (from most important):
  • Air gap (between the magnet and the plate), as even a very small clearance (e.g. 0.5 mm) can cause a drastic drop in force by up to 50% (this also applies to paint, rust or dirt).
  • Force direction – note that the magnet holds strongest perpendicularly. Under sliding down, the holding force drops drastically, often to levels of 20-30% of the maximum value.
  • Wall thickness – the thinner the sheet, the weaker the hold. Part of the magnetic field passes through the material instead of converting into lifting capacity.
  • Plate material – mild steel attracts best. Alloy admixtures lower magnetic properties and holding force.
  • Base smoothness – the more even the plate, the better the adhesion and stronger the hold. Roughness creates an air distance.
  • Temperature – heating the magnet results in weakening of force. Check the maximum operating temperature for a given model.

Lifting capacity was determined with the use of a polished steel plate of suitable thickness (min. 20 mm), under perpendicular detachment force, however under shearing force the load capacity is reduced by as much as fivefold. In addition, even a minimal clearance between the magnet and the plate decreases the lifting capacity.

Warnings
Skin irritation risks

A percentage of the population experience a sensitization to Ni, which is the standard coating for NdFeB magnets. Frequent touching might lead to a rash. We recommend use protective gloves.

Thermal limits

Regular neodymium magnets (grade N) lose magnetization when the temperature exceeds 80°C. Damage is permanent.

Hand protection

Watch your fingers. Two powerful magnets will join immediately with a force of massive weight, crushing anything in their path. Be careful!

Caution required

Before use, check safety instructions. Sudden snapping can break the magnet or injure your hand. Think ahead.

Eye protection

NdFeB magnets are sintered ceramics, which means they are very brittle. Clashing of two magnets will cause them cracking into shards.

Dust is flammable

Dust generated during grinding of magnets is flammable. Do not drill into magnets without proper cooling and knowledge.

Data carriers

Intense magnetic fields can erase data on credit cards, hard drives, and storage devices. Stay away of min. 10 cm.

Pacemakers

People with a pacemaker must maintain an safe separation from magnets. The magnetism can stop the functioning of the life-saving device.

GPS and phone interference

A powerful magnetic field disrupts the operation of compasses in smartphones and navigation systems. Keep magnets near a device to avoid breaking the sensors.

Danger to the youngest

Strictly store magnets away from children. Risk of swallowing is high, and the consequences of magnets clamping inside the body are tragic.

Security! Want to know more? Read our article: Why are neodymium magnets dangerous?