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SM 32x200 [2xM8] / N42 - magnetic separator

magnetic separator

Catalog no 130298

GTIN/EAN: 5906301812913

Diameter Ø
32 mm [±1 mm]
Height
200 mm [±1 mm]
Weight
1070 g
Magnetic Flux
~ 8 000 Gauss [±5%]

How we measure these parameters — certificates and measurements

product details »

590.00 zł net / pcs

725.70 zł with VAT (23% VAT) / pcs

price for transport

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price from 10 pcs
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653.13 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 32x200 [2xM8] / N42 - magnetic separator

Specification / characteristics - SM 32x200 [2xM8] / N42 - magnetic separator

properties
properties values
Cat. no. 130298
GTIN/EAN 5906301812913
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 200 mm [±1 mm]
Weight 1070 g
Material Type Stainless steel AISI 304 / A2
Magnetic Flux ~ 8 000 Gauss [±5%]
Size/Mount Quantity 2xM8
Polarity circumferential - 7 poles
Casing Tube Thickness 1 mm
Manufacturing Tolerance ±1 mm

Magnetic properties of material N42

Specification / characteristics SM 32x200 [2xM8] / N42 - magnetic separator
properties values units
remenance Br [min. - max.] ? 12.9-13.2 kGs
remenance Br [min. - max.] ? 1290-1320 mT
coercivity bHc ? 10.8-12.0 kOe
coercivity bHc ? 860-955 kA/m
actual internal force iHc ≥ 12 kOe
actual internal force iHc ≥ 955 kA/m
energy density [min. - max.] ? 40-42 BH max MGOe
energy density [min. - max.] ? 318-334 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 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 32x200 [2xM8] / N42

Parameter Value Description / Unit
Diameter (Ø) 32 mm
Total length 200 mm (L)
Active length 164 mm
Section count 7 modules
Dead zone 36 mm (2x 18mm starter)
Weight (est.) ~1222 g
Active area 165 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 (7 sections)

Simulation: 7 magnetic modules (pitch 23 mm).

Chart 3: Temperature performance

Technical and environmental data

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: 130298-2026
Measurement Calculator

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A magnetic rod is the basic element of building grate separators and magnetic filters. 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 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. You can use compressed air or special non-magnetic strippers (rings). For easier operation, it is worth considering ordering a rod in a version with a cleaning sleeve.
The Gauss value tells us how effectively and deeply the magnet will catch contaminants. The economical version (8kGs) handles large pieces of metal perfectly. 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. You can choose a mounting method consistent with your technical design. Contact us for a quote on a non-standard dimension.

Advantages and disadvantages of rare earth magnets.

Pros

Besides their durability, neodymium magnets are valued for these benefits:
  • They do not lose strength, even over approximately 10 years – the decrease in lifting capacity is only ~1% (based on measurements),
  • Neodymium magnets prove to be exceptionally resistant to loss of magnetic properties caused by external interference,
  • By using a shiny coating of nickel, the element acquires an elegant look,
  • They are known for high magnetic induction at the operating surface, which affects their effectiveness,
  • Neodymium magnets are characterized by very high magnetic induction on the magnet surface and are able to act (depending on the shape) even at a temperature of 230°C or more...
  • In view of the possibility of accurate molding and adaptation to unique solutions, neodymium magnets can be produced in a variety of geometric configurations, which amplifies use scope,
  • Significant place in advanced technology sectors – they serve a role in data components, electromotive mechanisms, advanced medical instruments, also multitasking production systems.
  • Compactness – despite small sizes they generate large force, making them ideal for precision applications

Limitations

Cons of neodymium magnets and ways of using them
  • To avoid cracks upon strong impacts, we recommend using special steel housings. Such a solution secures the magnet and simultaneously improves 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.
  • 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 casing - magnetic mount, due to difficulties in realizing nuts inside the magnet and complex forms.
  • Possible danger related to microscopic parts of magnets are risky, in case of ingestion, which becomes key in the context of child safety. Additionally, small elements of these products can be problematic in diagnostics medical after entering the body.
  • Higher cost of purchase is a significant factor to consider compared to ceramic magnets, especially in budget applications

Holding force characteristics

Highest magnetic holding force – what contributes to it?

Holding force of 0.00 kg is a measurement result performed under the following configuration:
  • with the application of a yoke made of special test steel, ensuring maximum field concentration
  • possessing a thickness of at least 10 mm to ensure full flux closure
  • with a plane cleaned and smooth
  • with total lack of distance (without impurities)
  • for force applied at a right angle (in the magnet axis)
  • at temperature room level

Impact of factors on magnetic holding capacity in practice

Please note that the application force may be lower depending on elements below, starting with the most relevant:
  • Distance (betwixt the magnet and the metal), because even a tiny distance (e.g. 0.5 mm) leads to a reduction in force by up to 50% (this also applies to paint, rust or debris).
  • Pull-off angle – note that the magnet has greatest strength perpendicularly. Under shear forces, the capacity drops drastically, often to levels of 20-30% of the maximum value.
  • Substrate thickness – to utilize 100% power, the steel must be sufficiently thick. Paper-thin metal restricts the attraction force (the magnet "punches through" it).
  • Steel grade – ideal substrate is pure iron steel. Stainless steels may attract less.
  • Surface structure – the smoother and more polished the plate, the better the adhesion and higher the lifting capacity. Unevenness creates an air distance.
  • Thermal environment – heating the magnet results in weakening of force. It is worth remembering the maximum operating temperature for a given model.

Holding force was tested on a smooth steel plate of 20 mm thickness, when a perpendicular force was applied, in contrast under shearing force the lifting capacity is smaller. Moreover, even a slight gap between the magnet’s surface and the plate decreases the load capacity.

Safe handling of neodymium magnets
ICD Warning

For implant holders: Powerful magnets disrupt electronics. Maintain minimum 30 cm distance or ask another person to handle the magnets.

Keep away from computers

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

Eye protection

Watch out for shards. Magnets can fracture upon uncontrolled impact, ejecting shards into the air. Wear goggles.

Handling guide

Use magnets consciously. Their powerful strength can shock even professionals. Be vigilant and respect their power.

Physical harm

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

No play value

Adult use only. Small elements can be swallowed, causing intestinal necrosis. Keep out of reach of children and animals.

Machining danger

Fire hazard: Rare earth powder is highly flammable. Do not process magnets in home conditions as this risks ignition.

Thermal limits

Keep cool. Neodymium magnets are susceptible to temperature. If you need operation above 80°C, look for special high-temperature series (H, SH, UH).

Skin irritation risks

Studies show that the nickel plating (the usual finish) is a potent allergen. If your skin reacts to metals, refrain from touching magnets with bare hands and select encased magnets.

Precision electronics

Navigation devices and smartphones are highly sensitive to magnetic fields. Direct contact with a strong magnet can decalibrate the internal compass in your phone.

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