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SM 32x500 [2xM8] / N42 - magnetic separator

magnetic separator

Catalog no 130374

GTIN/EAN: 5906301813224

5.00
Diameter Ø
32 mm [±1 mm]
Height
500 mm [±1 mm]
Weight
2670 g
Magnetic Flux
~ 8 000 Gauss [±5%]

How we measure these parameters — certificates and measurements

see specifications »

1210.00 zł net / pcs

1488.30 zł with VAT (23% VAT) / pcs

price for transport

bulk discounts:

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Gross
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1488.30 zł
price from 5 pcs
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1339.47 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 of the product - SM 32x500 [2xM8] / N42 - magnetic separator

Specification / characteristics - SM 32x500 [2xM8] / N42 - magnetic separator

properties
properties values
Cat. no. 130374
GTIN/EAN 5906301813224
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 500 mm [±1 mm]
Weight 2670 g
Material Type Stainless steel AISI 304 / A2
Magnetic Flux ~ 8 000 Gauss [±5%]
Size/Mount Quantity 2xM8
Polarity circumferential - 19 poles
Casing Tube Thickness 1 mm
Manufacturing Tolerance ±1 mm

Magnetic properties of material N42

Specification / characteristics SM 32x500 [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 32x500 [2xM8] / N42

Parameter Value Description / Unit
Diameter (Ø) 32 mm
Total length 500 mm (L)
Active length 464 mm
Section count 20 modules
Dead zone 36 mm (2x 18mm starter)
Weight (est.) ~3056 g
Active area 466 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 (20 sections)

Simulation: 20 magnetic modules (pitch 23 mm).

Chart 3: Temperature performance

Technical specification and ecology

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%

Environmental data

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: 130374-2026
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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. High magnetic induction on the surface allows catching the finest iron particles.
The construction relies on a sealed, welded stainless steel housing, polished smooth. 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.
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). 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. 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). 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.

Pros and cons of neodymium magnets.

Benefits

Apart from their strong magnetism, neodymium magnets have these key benefits:
  • They do not lose power, even after nearly ten years – the drop in lifting capacity is only ~1% (according to tests),
  • They are noted for resistance to demagnetization induced by external disturbances,
  • Thanks to the smooth finish, the coating of Ni-Cu-Ni, gold, or silver-plated gives an visually attractive appearance,
  • Neodymium magnets achieve maximum magnetic induction on a contact point, which ensures high operational effectiveness,
  • Neodymium magnets are characterized by extremely high magnetic induction on the magnet surface and can function (depending on the form) even at a temperature of 230°C or more...
  • In view of the ability of flexible molding and adaptation to specialized needs, NdFeB magnets can be manufactured in a wide range of forms and dimensions, which makes them more universal,
  • Huge importance in electronics industry – they are used in hard drives, drive modules, advanced medical instruments, also industrial machines.
  • Compactness – despite small sizes they generate large force, making them ideal for precision applications

Cons

What to avoid - cons of neodymium magnets: tips and applications.
  • They are fragile upon too strong impacts. To avoid cracks, it is worth protecting magnets in special housings. Such protection not only shields the magnet but also increases its resistance to damage
  • NdFeB magnets demagnetize when exposed to high temperatures. After reaching 80°C, many of them experience permanent drop of power (a factor is the shape as well as dimensions of the magnet). We offer magnets specially adapted to work at temperatures up to 230°C marked [AH], which are very resistant to heat
  • Magnets exposed to a humid environment can corrode. Therefore while using outdoors, we advise using waterproof magnets made of rubber, plastic or other material resistant to moisture
  • Limited ability of producing nuts in the magnet and complicated forms - recommended is a housing - magnet mounting.
  • Potential hazard to health – tiny shards of magnets pose a threat, in case of ingestion, which is particularly important in the context of child health protection. It is also worth noting that tiny parts of these devices can complicate diagnosis medical in case of swallowing.
  • Higher cost of purchase is one of the disadvantages compared to ceramic magnets, especially in budget applications

Lifting parameters

Maximum lifting capacity of the magnet – what it depends on?

The declared magnet strength represents the limit force, obtained under laboratory conditions, meaning:
  • on a plate made of structural steel, effectively closing the magnetic field
  • with a cross-section no less than 10 mm
  • with a plane perfectly flat
  • with direct contact (no coatings)
  • under vertical force direction (90-degree angle)
  • in neutral thermal conditions

What influences lifting capacity in practice

During everyday use, the actual lifting capacity depends on many variables, presented from the most important:
  • Distance (betwixt the magnet and the plate), as even a microscopic clearance (e.g. 0.5 mm) results in a decrease in lifting capacity by up to 50% (this also applies to varnish, corrosion or dirt).
  • Force direction – note that the magnet has greatest strength perpendicularly. Under shear forces, the holding force drops drastically, often to levels of 20-30% of the maximum value.
  • Steel thickness – insufficiently thick steel causes magnetic saturation, causing part of the power to be escaped into the air.
  • Steel grade – the best choice is pure iron steel. Cast iron may generate lower lifting capacity.
  • Surface finish – full contact is possible only on smooth steel. Any scratches and bumps create air cushions, weakening the magnet.
  • Operating temperature – neodymium magnets have a sensitivity to temperature. When it is hot they lose power, and in frost gain strength (up to a certain limit).

Holding force was measured on a smooth steel plate of 20 mm thickness, when the force acted perpendicularly, whereas under attempts to slide the magnet the lifting capacity is smaller. Moreover, even a slight gap between the magnet’s surface and the plate decreases the load capacity.

Precautions when working with neodymium magnets
Serious injuries

Large magnets can break fingers instantly. Under no circumstances put your hand betwixt two strong magnets.

GPS and phone interference

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

Magnetic media

Avoid bringing magnets near a purse, laptop, or screen. The magnetic field can irreversibly ruin these devices and erase data from cards.

ICD Warning

People with a pacemaker must keep an large gap from magnets. The magnetic field can interfere with the operation of the implant.

Protective goggles

Despite metallic appearance, neodymium is delicate and cannot withstand shocks. Do not hit, as the magnet may shatter into sharp, dangerous pieces.

Fire warning

Combustion risk: Rare earth powder is explosive. Do not process magnets without safety gear as this may cause fire.

Nickel allergy

Warning for allergy sufferers: The Ni-Cu-Ni coating contains nickel. If skin irritation happens, cease working with magnets and wear gloves.

Thermal limits

Control the heat. Exposing the magnet above 80 degrees Celsius will permanently weaken its magnetic structure and strength.

Adults only

Product intended for adults. Small elements can be swallowed, causing severe trauma. Keep out of reach of kids and pets.

Immense force

Handle with care. Neodymium magnets act from a long distance and connect with massive power, often quicker than you can move away.

Caution! Want to know more? Check our post: Are neodymium magnets dangerous?