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SM 32x100 [2xM8] / N42 - magnetic separator

magnetic separator

Catalog no 130296

GTIN/EAN: 5906301812890

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

How we measure these parameters — certificates and measurements

view technical data »

400.00 zł net / pcs

492.00 zł with VAT (23% VAT) / pcs

price for transport

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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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Product card - SM 32x100 [2xM8] / N42 - magnetic separator

Specification / characteristics - SM 32x100 [2xM8] / N42 - magnetic separator

properties
properties values
Cat. no. 130296
GTIN/EAN 5906301812890
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 100 mm [±1 mm]
Weight 536 g
Material Type Stainless steel AISI 304 / A2
Magnetic Flux ~ 8 000 Gauss [±5%]
Size/Mount Quantity 2xM8
Polarity circumferential - 3 poles
Casing Tube Thickness 1 mm
Manufacturing Tolerance ±1 mm

Magnetic properties of material N42

Specification / characteristics SM 32x100 [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 32x100 [2xM8] / N42

Parameter Value Description / Unit
Diameter (Ø) 32 mm
Total length 100 mm (L)
Active length 64 mm
Section count 2 modules
Dead zone 36 mm (2x 18mm starter)
Weight (est.) ~611 g
Active area 64 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 (2 sections)

Simulation: 2 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%

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: 130296-2026
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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. 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. Inside there is a stack of strong neodymium magnets arranged in a special configuration (magnetic circuit). Thanks to this, the rod is durable, hygienic, and easy to keep clean.
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.
The more Gauss, the smaller and more weakly magnetic particles will be effectively caught. The economical version (8kGs) handles large pieces of metal perfectly. High Power versions (~12000-14000 Gs) are necessary for catching metallic dust, oxides, and stainless steel after processing.
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. Contact us for a quote on a non-standard dimension.

Advantages and disadvantages of neodymium magnets.

Advantages

Besides their stability, neodymium magnets are valued for these benefits:
  • They retain full power for almost ten years – the drop is just ~1% (based on simulations),
  • Magnets very well resist against demagnetization caused by external fields,
  • Thanks to the shiny finish, the layer of nickel, gold, or silver-plated gives an elegant appearance,
  • Magnets are characterized by maximum magnetic induction on the working surface,
  • Due to their durability and thermal resistance, neodymium magnets are capable of operate (depending on the form) even at high temperatures reaching 230°C or more...
  • Thanks to versatility in constructing and the capacity to modify to individual projects,
  • Versatile presence in electronics industry – they serve a role in HDD drives, motor assemblies, medical equipment, and modern systems.
  • Relatively small size with high pulling force – neodymium magnets offer impressive pulling force in compact dimensions, which allows their use in compact constructions

Limitations

What to avoid - cons of neodymium magnets and ways of using them
  • To avoid cracks under impact, we suggest using special steel holders. Such a solution protects the magnet and simultaneously improves its durability.
  • Neodymium magnets lose their power 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 advise using waterproof magnets made of rubber, plastic or other material resistant to moisture, when using outdoors
  • We recommend a housing - magnetic mount, due to difficulties in realizing threads inside the magnet and complex shapes.
  • Health risk to health – tiny shards of magnets can be dangerous, when accidentally swallowed, which is particularly important in the aspect of protecting the youngest. Additionally, tiny parts of these magnets are able to complicate diagnosis medical after entering the body.
  • Higher cost of purchase is one of the disadvantages compared to ceramic magnets, especially in budget applications

Pull force analysis

Maximum lifting force for a neodymium magnet – what contributes to it?

The force parameter is a result of laboratory testing conducted under the following configuration:
  • on a block made of mild steel, optimally conducting the magnetic field
  • possessing a massiveness of minimum 10 mm to avoid saturation
  • characterized by smoothness
  • without the slightest air gap between the magnet and steel
  • during detachment in a direction vertical to the plane
  • at room temperature

Lifting capacity in real conditions – factors

It is worth knowing that the application force may be lower depending on elements below, in order of importance:
  • Distance – existence of any layer (paint, tape, gap) interrupts the magnetic circuit, which lowers power rapidly (even by 50% at 0.5 mm).
  • Pull-off angle – remember 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. Thin sheet limits the lifting capacity (the magnet "punches through" it).
  • Steel type – low-carbon steel gives the best results. Higher carbon content reduce magnetic permeability and holding force.
  • Surface finish – ideal contact is obtained only on smooth steel. Any scratches and bumps reduce the real contact area, reducing force.
  • Temperature – temperature increase causes a temporary drop of force. It is worth remembering the thermal limit for a given model.

Holding force was measured on the plate surface of 20 mm thickness, when the force acted perpendicularly, in contrast under parallel forces the load capacity is reduced by as much as fivefold. Additionally, even a small distance between the magnet and the plate decreases the holding force.

Safety rules for work with NdFeB magnets
Fragile material

Beware of splinters. Magnets can explode upon violent connection, launching shards into the air. We recommend safety glasses.

Crushing force

Mind your fingers. Two large magnets will join instantly with a force of several hundred kilograms, crushing anything in their path. Be careful!

Permanent damage

Watch the temperature. Heating the magnet to high heat will ruin its properties and strength.

Protect data

Avoid bringing magnets close to a wallet, laptop, or screen. The magnetic field can destroy these devices and erase data from cards.

Nickel allergy

Warning for allergy sufferers: The nickel-copper-nickel coating contains nickel. If redness occurs, immediately stop handling magnets and wear gloves.

Immense force

Handle magnets with awareness. Their huge power can surprise even experienced users. Plan your moves and respect their force.

Life threat

Warning for patients: Strong magnetic fields disrupt medical devices. Keep at least 30 cm distance or request help to work with the magnets.

Compass and GPS

A powerful magnetic field interferes with the functioning of magnetometers in phones and navigation systems. Keep magnets near a device to prevent breaking the sensors.

Swallowing risk

Adult use only. Tiny parts pose a choking risk, causing intestinal necrosis. Store away from children and animals.

Mechanical processing

Fire warning: Neodymium dust is explosive. Avoid machining magnets without safety gear as this may cause fire.

Security! Need more info? Check our post: Are neodymium magnets dangerous?