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SM 32x325 [2xM8] / N42 - magnetic separator

magnetic separator

Catalog no 130378

GTIN/EAN: 5906301813262

Diameter Ø
32 mm [±1 mm]
Height
325 mm [±1 mm]
Weight
1740 g
Magnetic Flux
~ 8 000 Gauss [±5%]

How we measure these parameters — certificates and measurements

view properties »

930.00 zł net / pcs

1143.90 zł with VAT (23% VAT) / pcs

price for transport

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Gross
price from 1 pcs
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price from 5 pcs
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1029.51 zł

Frequently asked questions

Which rod should I choose for fine contamination?
For particles below 0.5 mm — a Ø32 mm rod in grade N52, with surface induction of about 10,000 Gs. A Ø25 rod in grade N42 gives about 6,500 Gs and is chosen for contamination above 1 mm: bolts, washers, pieces of wire.
Which rod pitch should I choose?
The narrow pitch, 40 mm centre to centre, for fine free-flowing fractions — it gives denser coverage of the cross-section. The wide pitch, 50 mm, for granulates and for damp, greasy or sticky materials, where a narrow pitch risks the material bridging above the rods.
Why does efficiency drop after a few weeks of operation?
Almost always because the separator has not been cleaned. The layer of captured particles shields the field, and further particles settle on that layer rather than on the rod surface, where the gradient is far stronger. The magnets themselves do not weaken at that rate.

Guides from the knowledge base

Want to talk magnets?

Call us now +48 888 99 98 98 alternatively let us know using contact form the contact section.
Specifications and structure of a neodymium magnet can be estimated using our power calculator.

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Technical details - SM 32x325 [2xM8] / N42 - magnetic separator

Specification / characteristics - SM 32x325 [2xM8] / N42 - magnetic separator

properties
properties values
Cat. no. 130378
GTIN/EAN 5906301813262
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 32 mm [±1 mm]
Height 325 mm [±1 mm]
Weight 1740 g
Material Type Stainless steel AISI 304 / A2
Magnetic Flux ~ 8 000 Gauss [±5%]
Size/Mount Quantity 2xM8
Polarity circumferential - 12 poles
Casing Tube Thickness 1 mm
Manufacturing Tolerance ±1 mm

Magnetic properties of material N42

Specification / characteristics SM 32x325 [2xM8] / N42 - magnetic separator
properties values units
Remanence Br ? 12.9-13.2 kGs
Remanence Br ? 1290-1320 mT
Coercivity bHc ? 10.8-12.0 kOe
Coercivity bHc ? 860-955 kA/m
Intrinsic coercivity iHc ≥ 12 kOe
Intrinsic coercivity iHc ≥ 955 kA/m
Energy product BHmax ? 40-42 BH max MGOe
Energy product BHmax ? 318-334 BH max KJ/m
Maximum working 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 310 °C
Curie Temperature TF 590 °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 32x325 [2xM8] / N42

Parameter Value Description / Unit
Diameter (Ø) 32 mm
Total length 325 mm (L)
Active length 289 mm
Section count 12 modules
Dead zone 36 mm (2x 18mm starter)
Weight (est.) ~1986 g
Active area 291 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) 26.2 kg (theor.)
Induction (surface) ~8 000 Gauss (Max)
Max T = 80°C. Construction data for M8/M10 thread series.

Chart 2: Field profile (12 sections)

Simulation: 12 magnetic modules (pitch 23 mm).

Chart 3: Temperature performance

Technical specification and ecology

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%

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: 130378-2026
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SM 32x175 [2xM8] / N42 - magnetic separator

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This product serves to effectively catch ferromagnetic contaminants from bulk and liquid products. It is mounted in chutes, hoppers, and pipelines to protect production machines from failure. High magnetic induction on the surface allows catching the finest iron particles.
The construction relies on a sealed, welded stainless steel housing, polished smooth. 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.
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.
The more Gauss, the smaller and more weakly magnetic particles will be effectively caught. Standard rods (~8000 Gs) are sufficient for catching screws, nails, and steel shavings. For the food and precision industry, we recommend the highest induction parameters.
We fulfill individual orders for bars perfectly matched to your machine or separator. 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.

Pros as well as cons of neodymium magnets.

Strengths

In addition to their long-term stability, neodymium magnets provide the following advantages:
  • Their magnetic field remains stable, and after around 10 years it drops only by ~1% (according to research),
  • Magnets perfectly defend themselves against loss of magnetization caused by ambient magnetic noise,
  • Thanks to the shimmering finish, the plating of Ni-Cu-Ni, gold-plated, or silver gives an modern appearance,
  • The surface of neodymium magnets generates a strong magnetic field – this is a distinguishing feature,
  • Due to their durability and thermal resistance, neodymium magnets can operate (depending on the shape) even at high temperatures reaching 230°C or more...
  • Possibility of individual shaping and adjusting to atypical needs,
  • Key role in innovative solutions – they serve a role in magnetic memories, brushless drives, precision medical tools, as well as modern systems.
  • Relatively small size with high pulling force – neodymium magnets offer strong magnetic field in compact dimensions, which makes them useful in small systems

Disadvantages

Drawbacks and weaknesses of neodymium magnets and ways of using them
  • Brittleness is one of their disadvantages. Upon intense impact they can fracture. We advise keeping them in a special holder, which not only secures them against impacts but also raises their durability
  • Neodymium magnets decrease their strength under the influence of heating. As soon as 80°C is exceeded, many of them start losing their power. Therefore, we recommend our special magnets marked [AH], which maintain stability even at temperatures up to 230°C
  • Due to the susceptibility of magnets to corrosion in a humid environment, we suggest using waterproof magnets made of rubber, plastic or other material stable to moisture, in case of application outdoors
  • We suggest a housing - magnetic holder, due to difficulties in realizing nuts inside the magnet and complex forms.
  • Health risk related to microscopic parts of magnets can be dangerous, in case of ingestion, which becomes key in the aspect of protecting the youngest. It is also worth noting that small elements of these products can complicate diagnosis medical in case of swallowing.
  • Higher cost of purchase is a significant factor to consider compared to ceramic magnets, especially in budget applications

Lifting parameters

Magnetic strength at its maximum – what contributes to it?

Breakaway force was defined for optimal configuration, including:
  • with the application of a sheet made of special test steel, ensuring maximum field concentration
  • with a cross-section minimum 10 mm
  • with an polished touching surface
  • without the slightest insulating layer between the magnet and steel
  • during detachment in a direction perpendicular to the mounting surface
  • in neutral thermal conditions

Practical aspects of lifting capacity – factors

Effective lifting capacity is affected by working environment parameters, including (from priority):
  • Clearance – the presence of foreign body (rust, dirt, air) interrupts the magnetic circuit, which reduces capacity rapidly (even by 50% at 0.5 mm).
  • Force direction – declared lifting capacity refers to pulling vertically. When applying parallel force, the magnet holds significantly lower power (typically approx. 20-30% of nominal force).
  • Wall thickness – the thinner the sheet, the weaker the hold. Part of the magnetic field penetrates through instead of converting into lifting capacity.
  • Metal type – not every steel reacts the same. High carbon content weaken the attraction effect.
  • Surface condition – ground elements guarantee perfect abutment, which improves field saturation. Rough surfaces weaken the grip.
  • Temperature – heating the magnet results in weakening of force. Check the maximum operating temperature for a given model.

Lifting capacity testing was conducted on a smooth plate of suitable thickness, under a perpendicular pulling force, whereas under shearing force the load capacity is reduced by as much as fivefold. In addition, even a slight gap between the magnet’s surface and the plate lowers the lifting capacity.

Precautions when working with neodymium magnets
Threat to electronics

Equipment safety: Neodymium magnets can ruin data carriers and sensitive devices (heart implants, hearing aids, timepieces).

Thermal limits

Watch the temperature. Exposing the magnet above 80 degrees Celsius will destroy its properties and pulling force.

Powerful field

Handle magnets consciously. Their powerful strength can shock even experienced users. Stay alert and respect their force.

Impact on smartphones

Remember: neodymium magnets produce a field that interferes with precision electronics. Keep a separation from your phone, device, and navigation systems.

Hand protection

Danger of trauma: The pulling power is so immense that it can cause hematomas, crushing, and broken bones. Protective gloves are recommended.

Keep away from children

NdFeB magnets are not toys. Accidental ingestion of several magnets can lead to them connecting inside the digestive tract, which poses a critical condition and requires immediate surgery.

Health Danger

Patients with a pacemaker should keep an large gap from magnets. The magnetic field can stop the functioning of the implant.

Nickel allergy

It is widely known that the nickel plating (the usual finish) is a common allergen. If your skin reacts to metals, avoid touching magnets with bare hands and select encased magnets.

Shattering risk

NdFeB magnets are sintered ceramics, meaning they are fragile like glass. Collision of two magnets leads to them shattering into small pieces.

Flammability

Dust generated during machining of magnets is combustible. Do not drill into magnets unless you are an expert.

Important! Looking for details? Read our article: Why are neodymium magnets dangerous?