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SM 32x325 [2xM8] / N42 - magnetic separator

magnetic separator

Catalog no 130378

GTIN/EAN: 5906301813262

Diameter Ø

32 mm [±1 mm]

Height

325 mm [±1 mm]

Weight

1740 g

Magnetic Flux

~ 8 000 Gauss [±5%]

971.70 with VAT / pcs + price for transport

790.00 ZŁ net + 23% VAT / pcs

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Lifting power and shape of a neodymium magnet can be tested on our magnetic mass calculator.

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Product card - SM 32x325 [2xM8] / N42 - magnetic separator

Specification / characteristics - SM 32x325 [2xM8] / N42 - magnetic separator

properties
properties values
Cat. no. 130378
GTIN/EAN 5906301813262
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 325 mm [±1 mm]
Weight 1740 g
Material Type Stainless steel AISI 304 / A2
Magnetic Flux ~ 8 000 Gauss [±5%]
Size/Mount Quantity 2xM8
Polarity circumferential - 12 poles
Casing Tube Thickness 1 mm
Manufacturing Tolerance ±1 mm

Magnetic properties of material N42

Specification / characteristics SM 32x325 [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 312 - 380 °C
Curie Temperature TF 593 - 716 °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 32x325 [2xM8] / N42

Parameter Value Description / Unit
Diameter (Ø) 32 mm
Total length 325 mm (L)
Active length 289 mm
Section count 12 modules
Dead zone 36 mm (2x 18mm starter)
Weight (est.) ~1986 g
Active area 291 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) 17.3 kg (theor.)
Induction (surface) ~6 500 Gauss (Max)

Chart 2: Field profile (12 sections)

Chart 3: Temperature performance

Engineering data and GPSR
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%
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: 130378-2025
Magnet Unit Converter
Magnet pull force

Field Strength

See also products

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. High magnetic induction on the surface allows catching the finest iron particles.
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). 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). 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. 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.
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. We ensure fast realization of special orders and technical advice.

Pros and cons of neodymium magnets.

Advantages

Apart from their strong magnetism, neodymium magnets have these key benefits:
  • They do not lose magnetism, even during nearly 10 years – the drop in lifting capacity is only ~1% (according to tests),
  • They maintain their magnetic properties even under strong external field,
  • In other words, due to the metallic layer of nickel, the element gains a professional look,
  • They show high magnetic induction at the operating surface, which improves attraction properties,
  • Thanks to resistance to high temperature, they can operate (depending on the form) even at temperatures up to 230°C and higher...
  • Possibility of precise modeling and optimizing to individual requirements,
  • Versatile presence in modern industrial fields – they serve a role in magnetic memories, drive modules, medical equipment, and industrial machines.
  • Thanks to concentrated force, small magnets offer high operating force, in miniature format,

Cons

Disadvantages of neodymium magnets:
  • Brittleness is one of their disadvantages. Upon intense impact they can break. We advise keeping them in a special holder, which not only protects them against impacts but also increases their durability
  • Neodymium magnets lose their force under the influence of heating. As soon as 80°C is exceeded, many of them start losing their power. Therefore, we recommend our special magnets marked [AH], which maintain stability even at temperatures up to 230°C
  • They oxidize in a humid environment. For use outdoors we recommend using waterproof magnets e.g. in rubber, plastic
  • Due to limitations in realizing threads and complex shapes in magnets, we propose using casing - magnetic mount.
  • Health risk to health – tiny shards of magnets pose a threat, in case of ingestion, which becomes key in the context of child health protection. It is also worth noting that tiny parts of these magnets are able to disrupt the diagnostic process medical after entering the body.
  • High unit price – neodymium magnets have a higher price than other types of magnets (e.g. ferrite), which hinders application in large quantities

Holding force characteristics

Breakaway strength of the magnet in ideal conditionswhat contributes to it?

The force parameter is a result of laboratory testing conducted under standard conditions:
  • using a base made of mild steel, acting as a circuit closing element
  • with a cross-section no less than 10 mm
  • with a plane perfectly flat
  • with direct contact (no impurities)
  • for force applied at a right angle (in the magnet axis)
  • in neutral thermal conditions

Impact of factors on magnetic holding capacity in practice

Holding efficiency impacted by working environment parameters, mainly (from priority):
  • Distance (between the magnet and the plate), because even a microscopic distance (e.g. 0.5 mm) leads to a drastic drop in force by up to 50% (this also applies to varnish, corrosion or dirt).
  • Angle of force application – highest force is obtained only during pulling at a 90° angle. The shear force of the magnet along the surface is standardly many times lower (approx. 1/5 of the lifting capacity).
  • Steel thickness – insufficiently thick steel does not accept the full field, causing part of the power to be escaped to the other side.
  • Steel type – low-carbon steel gives the best results. Alloy admixtures lower magnetic permeability and holding force.
  • Plate texture – smooth surfaces guarantee perfect abutment, which increases field saturation. Rough surfaces weaken the grip.
  • Thermal conditions – NdFeB sinters 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).

Holding force was measured on the plate surface of 20 mm thickness, when the force acted perpendicularly, however under attempts to slide the magnet the holding force is lower. In addition, even a slight gap between the magnet’s surface and the plate decreases the lifting capacity.

H&S for magnets
Electronic devices

Data protection: Strong magnets can damage payment cards and sensitive devices (heart implants, medical aids, mechanical watches).

Health Danger

People with a heart stimulator must keep an absolute distance from magnets. The magnetic field can interfere with the operation of the life-saving device.

Physical harm

Large magnets can smash fingers in a fraction of a second. Never put your hand betwixt two attracting surfaces.

Do not underestimate power

Handle with care. Rare earth magnets attract from a long distance and connect with huge force, often faster than you can move away.

Flammability

Fire hazard: Neodymium dust is highly flammable. Avoid machining magnets without safety gear as this risks ignition.

Swallowing risk

Absolutely store magnets away from children. Risk of swallowing is high, and the consequences of magnets clamping inside the body are life-threatening.

Do not overheat magnets

Keep cool. Neodymium magnets are sensitive to heat. If you require resistance above 80°C, look for HT versions (H, SH, UH).

Fragile material

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

Nickel allergy

Studies show that nickel (standard magnet coating) is a strong allergen. If your skin reacts to metals, prevent direct skin contact and select coated magnets.

Phone sensors

A powerful magnetic field interferes with the functioning of magnetometers in smartphones and GPS navigation. Keep magnets close to a device to avoid damaging the sensors.

Safety First! Need more info? Check our post: Are neodymium magnets dangerous?
Dhit sp. z o.o.

e-mail: bok@dhit.pl

tel: +48 888 99 98 98