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SM 32x425 [2xM8] / N52 - magnetic separator

magnetic separator

Catalog no 130464

GTIN/EAN: 5906301813354

Diameter Ø
32 mm [±1 mm]
Height
425 mm [±1 mm]
Weight
2353 g
Magnetic Flux
~ 10 000 Gauss [±5%]

How we measure these parameters — certificates and measurements

technical details »

1190.00 zł net / pcs

1463.70 zł with VAT (23% VAT) / pcs

price for transport

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1317.33 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.

Order by 14:00 and we’ll ship today!

Technical data - SM 32x425 [2xM8] / N52 - magnetic separator

Specification / characteristics - SM 32x425 [2xM8] / N52 - magnetic separator

properties
properties values
Cat. no. 130464
GTIN/EAN 5906301813354
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 425 mm [±1 mm]
Weight 2353 g
Material Type Stainless steel AISI 304 / A2
Magnetic Flux ~ 10 000 Gauss [±5%]
Size/Mount Quantity 2xM8
Polarity circumferential - 16 poles
Casing Tube Thickness 1 mm
Manufacturing Tolerance ±1 mm

Magnetic properties of material N52

Specification / characteristics SM 32x425 [2xM8] / N52 - magnetic separator
properties values units
Remanence Br ? 14.2-14.7 kGs
Remanence Br ? 1420-1470 mT
Coercivity bHc ? 10.8-12.5 kOe
Coercivity bHc ? 860-995 kA/m
Intrinsic coercivity iHc ≥ 12 kOe
Intrinsic coercivity iHc ≥ 955 kA/m
Energy product BHmax ? 48-53 BH max MGOe
Energy product BHmax ? 380-422 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 32x425 [2xM8] / N52

Parameter Value Description / Unit
Diameter (Ø) 32 mm
Total length 425 mm (L)
Active length 389 mm
Section count 16 modules
Dead zone 36 mm (2x 18mm starter)
Weight (est.) ~2598 g
Active area 391 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) 41 kg (theor.)
Induction (surface) ~10 000 Gauss (Max)
Max T = 80°C. Construction data for M8/M10 thread series.

Chart 2: Field profile (16 sections)

Simulation: 16 magnetic modules (pitch 23 mm).

Chart 3: Temperature performance

Technical and environmental data

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%

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: 130464-2026
Measurement Calculator

Force (pull)

Magnetic Induction

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This product serves to effectively catch ferromagnetic contaminants from bulk and liquid products. 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 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 filings stick to the surface very strongly, so cleaning requires strength or cleverness. We recommend sticking packing tape to the cluster of filings and tearing it off together with the contaminants. 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. The economical version (8kGs) handles large pieces of metal perfectly. For the food and precision industry, we recommend the highest induction parameters.
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.

Pros as well as cons of neodymium magnets.

Strengths

Besides their remarkable field intensity, neodymium magnets offer the following advantages:
  • Their magnetic field is durable, and after around 10 years it decreases only by ~1% (theoretically),
  • They have excellent resistance to magnetic field loss when exposed to opposing magnetic fields,
  • In other words, due to the aesthetic surface of nickel, the element gains visual value,
  • Magnetic induction on the surface of the magnet turns out to be exceptional,
  • 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 custom shaping and adapting to concrete needs,
  • Significant place in innovative solutions – they are commonly used in computer drives, motor assemblies, advanced medical instruments, as well as modern systems.
  • Relatively small size with high pulling force – neodymium magnets offer high power in compact dimensions, which enables their usage in miniature devices

Limitations

Disadvantages of NdFeB magnets:
  • Brittleness is one of their disadvantages. Upon intense impact they can break. We advise keeping them in a special holder, which not only secures them against impacts but also raises their durability
  • When exposed to high temperature, neodymium magnets experience a drop in force. Often, when the temperature exceeds 80°C, their power decreases (depending on the size, as well as shape of the magnet). For those who need magnets for extreme conditions, we offer [AH] versions withstanding 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
  • Due to limitations in creating threads and complex shapes in magnets, we propose using a housing - magnetic mount.
  • Possible danger related to microscopic parts of magnets pose a threat, in case of ingestion, which gains importance in the aspect of protecting the youngest. It is also worth noting that tiny parts of these devices can complicate diagnosis 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

Highest magnetic holding force – what affects it?

Information about lifting capacity was defined for optimal configuration, taking into account:
  • with the application of a yoke made of special test steel, guaranteeing maximum field concentration
  • whose thickness equals approx. 10 mm
  • with a plane cleaned and smooth
  • with total lack of distance (without impurities)
  • for force applied at a right angle (pull-off, not shear)
  • at conditions approx. 20°C

Practical aspects of lifting capacity – factors

Bear in mind that the magnet holding will differ influenced by the following factors, starting with the most relevant:
  • Gap between surfaces – even a fraction of a millimeter of separation (caused e.g. by varnish or unevenness) significantly weakens the pulling force, often by half at just 0.5 mm.
  • Load vector – maximum parameter is obtained only during pulling at a 90° angle. The resistance to sliding of the magnet along the plate is standardly several times smaller (approx. 1/5 of the lifting capacity).
  • Steel thickness – insufficiently thick steel causes magnetic saturation, causing part of the power to be escaped to the other side.
  • Chemical composition of the base – low-carbon steel gives the best results. Alloy steels lower magnetic properties and holding force.
  • Surface structure – the smoother and more polished the plate, the larger the contact zone and stronger the hold. Unevenness creates an air distance.
  • Thermal conditions – NdFeB sinters have a sensitivity to temperature. When it is hot they are weaker, and at low temperatures gain strength (up to a certain limit).

Lifting capacity was measured using a polished steel plate of optimal thickness (min. 20 mm), under perpendicular pulling force, however under shearing force the holding force is lower. Additionally, even a minimal clearance between the magnet and the plate lowers the load capacity.

Warnings
Magnets are brittle

Watch out for shards. Magnets can fracture upon uncontrolled impact, ejecting sharp fragments into the air. Eye protection is mandatory.

Danger to the youngest

These products are not toys. Accidental ingestion of several magnets can lead to them pinching intestinal walls, which constitutes a direct threat to life and requires immediate surgery.

Demagnetization risk

Watch the temperature. Exposing the magnet to high heat will permanently weaken its magnetic structure and pulling force.

Physical harm

Watch your fingers. Two powerful magnets will join immediately with a force of several hundred kilograms, crushing anything in their path. Exercise extreme caution!

Dust is flammable

Powder generated during machining of magnets is combustible. Do not drill into magnets without proper cooling and knowledge.

Phone sensors

Navigation devices and smartphones are highly susceptible to magnetism. Direct contact with a strong magnet can ruin the internal compass in your phone.

Data carriers

Do not bring magnets near a purse, computer, or TV. The magnetism can irreversibly ruin these devices and wipe information from cards.

Safe operation

Be careful. Rare earth magnets attract from a long distance and snap with massive power, often quicker than you can move away.

Metal Allergy

Medical facts indicate that the nickel plating (standard magnet coating) is a strong allergen. If you have an allergy, avoid direct skin contact or opt for coated magnets.

ICD Warning

Patients with a heart stimulator have to maintain an safe separation from magnets. The magnetism can interfere with the functioning of the implant.

Warning! More info about risks in the article: Magnet Safety Guide.