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Product available Ships today (order by 14:00) CO2 GPSR PPWR REACH

SM 32x375 [2xM8] / N42 - magnetic separator

magnetic separator

Catalog no 130379

GTIN/EAN: 5906301813279

Diameter Ø
32 mm [±1 mm]
Height
375 mm [±1 mm]
Weight
2010 g
Magnetic Flux
~ 8 000 Gauss [±5%]

How we measure these parameters — certificates and measurements

view technical data »

1040.00 zł net / pcs

1279.20 zł with VAT (23% VAT) / pcs

price for transport

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Gross
price from 1 pcs
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1279.20 zł
price from 5 pcs
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1151.28 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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Physical properties - SM 32x375 [2xM8] / N42 - magnetic separator

Specification / characteristics - SM 32x375 [2xM8] / N42 - magnetic separator

properties
properties values
Cat. no. 130379
GTIN/EAN 5906301813279
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 375 mm [±1 mm]
Weight 2010 g
Material Type Stainless steel AISI 304 / A2
Magnetic Flux ~ 8 000 Gauss [±5%]
Size/Mount Quantity 2xM8
Polarity circumferential - 14 poles
Casing Tube Thickness 1 mm
Manufacturing Tolerance ±1 mm

Magnetic properties of material N42

Specification / characteristics SM 32x375 [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 32x375 [2xM8] / N42

Parameter Value Description / Unit
Diameter (Ø) 32 mm
Total length 375 mm (L)
Active length 339 mm
Section count 14 modules
Dead zone 36 mm (2x 18mm starter)
Weight (est.) ~2292 g
Active area 341 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 (14 sections)

Simulation: 14 magnetic modules (pitch 23 mm).

Chart 3: Temperature performance

Engineering data and GPSR

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: 130379-2026
Measurement Calculator

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This product serves to effectively catch ferromagnetic contaminants from bulk and liquid products. It is commonly used for cleaning flour, sugar, plastic granules, as well as oils and coolants. Thanks to the use of strong neodymium magnets, the rod catches even metallic dust.
The outer layer is hygienic acid-resistant steel, approved for food contact. 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. The most effective home method is using adhesive tape, which we wrap around the dirt and peel off. 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. 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.
Yes, as a manufacturer, we make rods of any length and diameter (standard is dia 25mm and 32mm). You can choose a mounting method consistent with your technical design. 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:
  • They do not lose magnetism, even after approximately 10 years – the reduction in lifting capacity is only ~1% (theoretically),
  • They have excellent resistance to weakening of magnetic properties due to external fields,
  • Thanks to the shiny finish, the coating of nickel, gold, or silver-plated gives an modern appearance,
  • Magnetic induction on the working layer of the magnet turns out to be maximum,
  • Through (appropriate) combination of ingredients, they can achieve high thermal strength, enabling action at temperatures reaching 230°C and above...
  • Possibility of exact creating as well as adjusting to complex conditions,
  • Significant place in high-tech industry – they serve a role in data components, motor assemblies, diagnostic systems, also complex engineering applications.
  • Compactness – despite small sizes they offer powerful magnetic field, making them ideal for precision applications

Disadvantages

Disadvantages of neodymium magnets:
  • They are prone to damage upon heavy impacts. To avoid cracks, it is worth protecting magnets in a protective case. Such protection not only protects the magnet but also increases its resistance to damage
  • Neodymium magnets lose 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 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
  • Limited ability of making threads in the magnet and complicated shapes - recommended is cover - magnet mounting.
  • Possible danger to health – tiny shards of magnets can be dangerous, if swallowed, which gains importance in the aspect of protecting the youngest. It is also worth noting that small components of these devices are able to disrupt the diagnostic process medical after entering the body.
  • With mass production the cost of neodymium magnets is a challenge,

Holding force characteristics

Maximum holding power of the magnet – what affects it?

Breakaway force is the result of a measurement for the most favorable conditions, including:
  • using a base made of mild steel, functioning as a magnetic yoke
  • whose transverse dimension equals approx. 10 mm
  • with a surface free of scratches
  • under conditions of ideal adhesion (surface-to-surface)
  • during detachment in a direction perpendicular to the mounting surface
  • at conditions approx. 20°C

Determinants of practical lifting force of a magnet

Bear in mind that the application force will differ influenced by the following factors, in order of importance:
  • Distance (between the magnet and the plate), because even a microscopic distance (e.g. 0.5 mm) results in a decrease in force by up to 50% (this also applies to paint, rust or dirt).
  • Loading method – catalog parameter refers to pulling vertically. When attempting to slide, the magnet holds much less (often approx. 20-30% of nominal force).
  • Plate thickness – insufficiently thick plate does not close the flux, causing part of the flux to be wasted into the air.
  • Chemical composition of the base – low-carbon steel gives the best results. Higher carbon content decrease magnetic properties and lifting capacity.
  • Surface quality – the smoother and more polished the plate, the larger the contact zone and higher the lifting capacity. Unevenness creates an air distance.
  • Temperature – heating the magnet results in weakening of induction. Check the thermal limit for a given model.

Holding force was checked on the plate surface of 20 mm thickness, when the force acted perpendicularly, however under shearing force the lifting capacity is smaller. Additionally, even a small distance between the magnet and the plate decreases the holding force.

Safety rules for work with NdFeB magnets
Protective goggles

Despite metallic appearance, the material is brittle and not impact-resistant. Do not hit, as the magnet may crumble into hazardous fragments.

Medical interference

For implant holders: Strong magnetic fields disrupt medical devices. Maintain at least 30 cm distance or request help to work with the magnets.

Adults only

NdFeB magnets are not suitable for play. Accidental ingestion of multiple magnets can lead to them connecting inside the digestive tract, which constitutes a critical condition and necessitates urgent medical intervention.

Safe operation

Exercise caution. Neodymium magnets attract from a long distance and snap with huge force, often faster than you can react.

GPS Danger

A powerful magnetic field disrupts the functioning of compasses in smartphones and GPS navigation. Maintain magnets close to a smartphone to avoid damaging the sensors.

Finger safety

Protect your hands. Two powerful magnets will join instantly with a force of massive weight, crushing anything in their path. Be careful!

Safe distance

Device Safety: Neodymium magnets can damage data carriers and delicate electronics (heart implants, hearing aids, mechanical watches).

Flammability

Fire hazard: Neodymium dust is explosive. Do not process magnets without safety gear as this may cause fire.

Do not overheat magnets

Monitor thermal conditions. Heating the magnet to high heat will destroy its magnetic structure and strength.

Skin irritation risks

A percentage of the population suffer from a contact allergy to Ni, which is the common plating for NdFeB magnets. Extended handling may cause a rash. We recommend use protective gloves.

Safety First! Learn more about risks in the article: Safety of working with magnets.