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SM 32x275 [2xM8] / N52 - magnetic separator

magnetic separator

Catalog no 130458

GTIN/EAN: 5906301813293

Diameter Ø
32 mm [±1 mm]
Height
275 mm [±1 mm]
Weight
1520 g
Magnetic Flux
~ 10 000 Gauss [±5%]

How we measure these parameters — certificates and measurements

see specifications »

830.00 zł net / pcs

1020.90 zł with VAT (23% VAT) / pcs

price for transport

bulk discounts:

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price from 5 pcs
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969.86 zł
price from 10 pcs
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918.81 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 data - SM 32x275 [2xM8] / N52 - magnetic separator

Specification / characteristics - SM 32x275 [2xM8] / N52 - magnetic separator

properties
properties values
Cat. no. 130458
GTIN/EAN 5906301813293
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 275 mm [±1 mm]
Weight 1520 g
Material Type Stainless steel AISI 304 / A2
Magnetic Flux ~ 10 000 Gauss [±5%]
Size/Mount Quantity 2xM8
Polarity circumferential - 10 poles
Casing Tube Thickness 1 mm
Manufacturing Tolerance ±1 mm

Magnetic properties of material N52

Specification / characteristics SM 32x275 [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 32x275 [2xM8] / N52

Parameter Value Description / Unit
Diameter (Ø) 32 mm
Total length 275 mm (L)
Active length 239 mm
Section count 10 modules
Dead zone 36 mm (2x 18mm starter)
Weight (est.) ~1681 g
Active area 240 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 (10 sections)

Simulation: 10 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%

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: 130458-2026
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It is the "heart" of every magnetic filter used in industry for cleaning raw materials. It is mounted in chutes, hoppers, and pipelines to protect production machines from failure. 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 core is a precise magnetic system generating high induction (Gauss). Thanks to this, the rod is durable, hygienic, and easy to keep clean.
Due to the high power of the magnet, direct removal of filings can be troublesome and time-consuming. 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. Standard rods (~8000 Gs) are sufficient for catching screws, nails, and steel shavings. High induction is necessary when contaminants are microscopic or weakly magnetic.
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.

Strengths as well as weaknesses of neodymium magnets.

Pros

Besides their durability, neodymium magnets are valued for these benefits:
  • Their power is maintained, and after around 10 years it drops only by ~1% (theoretically),
  • They show high resistance to demagnetization induced by external disturbances,
  • The use of an aesthetic finish of noble metals (nickel, gold, silver) causes the element to be more visually attractive,
  • Neodymium magnets create maximum magnetic induction on a small area, which allows for strong attraction,
  • Through (adequate) combination of ingredients, they can achieve high thermal strength, allowing for operation at temperatures approaching 230°C and above...
  • Considering the potential of free forming and adaptation to unique requirements, NdFeB magnets can be created in a wide range of shapes and sizes, which increases their versatility,
  • Wide application in advanced technology sectors – they find application in mass storage devices, drive modules, medical devices, also technologically advanced constructions.
  • Relatively small size with high pulling force – neodymium magnets offer impressive pulling force in small dimensions, which enables their usage in compact constructions

Limitations

What to avoid - cons of neodymium magnets: tips and applications.
  • To avoid cracks under impact, we suggest using special steel holders. Such a solution protects the magnet and simultaneously improves its durability.
  • When exposed to high temperature, neodymium magnets experience a drop in strength. Often, when the temperature exceeds 80°C, their strength 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 advise using waterproof magnets made of rubber, plastic or other material resistant to moisture, when using outdoors
  • Limited ability of creating nuts in the magnet and complicated forms - recommended is casing - mounting mechanism.
  • Health risk to health – tiny shards of magnets can be dangerous, in case of ingestion, which gains importance in the aspect of protecting the youngest. Additionally, small elements of these devices can disrupt the diagnostic process medical when they are in the body.
  • Due to expensive raw materials, their price exceeds standard values,

Holding force characteristics

Optimal lifting capacity of a neodymium magnet – what affects it?

Information about lifting capacity is the result of a measurement for ideal contact conditions, including:
  • on a base made of structural steel, perfectly concentrating the magnetic field
  • whose transverse dimension equals approx. 10 mm
  • characterized by lack of roughness
  • under conditions of ideal adhesion (metal-to-metal)
  • under axial application of breakaway force (90-degree angle)
  • at ambient temperature room level

Lifting capacity in practice – influencing factors

During everyday use, the real power results from many variables, ranked from the most important:
  • Gap between magnet and steel – even a fraction of a millimeter of separation (caused e.g. by varnish or unevenness) diminishes the magnet efficiency, often by half at just 0.5 mm.
  • Direction of force – highest force is obtained only during perpendicular pulling. The shear force of the magnet along the plate is typically several times smaller (approx. 1/5 of the lifting capacity).
  • Metal thickness – thin material does not allow full use of the magnet. Part of the magnetic field penetrates through instead of converting into lifting capacity.
  • Steel type – low-carbon steel attracts best. Higher carbon content decrease magnetic permeability and lifting capacity.
  • Base smoothness – the more even the plate, the larger the contact zone and higher the lifting capacity. Unevenness acts like micro-gaps.
  • Thermal conditions – neodymium magnets have a negative temperature coefficient. When it is hot they lose power, and at low temperatures they can be stronger (up to a certain limit).

Lifting capacity testing was conducted on plates with a smooth surface of suitable thickness, under a perpendicular pulling force, however under shearing force the holding force is lower. Additionally, even a minimal clearance between the magnet’s surface and the plate lowers the holding force.

H&S for magnets
Maximum temperature

Standard neodymium magnets (grade N) undergo demagnetization when the temperature exceeds 80°C. Damage is permanent.

Conscious usage

Handle magnets consciously. Their immense force can shock even professionals. Be vigilant and do not underestimate their power.

Do not drill into magnets

Fire warning: Neodymium dust is highly flammable. Do not process magnets in home conditions as this may cause fire.

Adults only

Always store magnets out of reach of children. Choking hazard is significant, and the effects of magnets connecting inside the body are very dangerous.

Data carriers

Avoid bringing magnets close to a purse, computer, or TV. The magnetism can irreversibly ruin these devices and erase data from cards.

Nickel coating and allergies

Certain individuals have a hypersensitivity to Ni, which is the common plating for neodymium magnets. Prolonged contact may cause a rash. We suggest use safety gloves.

Shattering risk

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

Health Danger

Medical warning: Strong magnets can deactivate pacemakers and defibrillators. Do not approach if you have medical devices.

Pinching danger

Big blocks can break fingers in a fraction of a second. Never place your hand between two strong magnets.

Precision electronics

GPS units and smartphones are extremely sensitive to magnetism. Direct contact with a strong magnet can decalibrate the internal compass in your phone.

Warning! Learn more about risks in the article: Magnet Safety Guide.