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SM 32x425 [2xM8] / N42 - magnetic separator

magnetic separator

Catalog no 130380

GTIN/EAN: 5906301813286

Diameter Ø

32 mm [±1 mm]

Height

425 mm [±1 mm]

Weight

2280 g

Magnetic Flux

~ 8 000 Gauss [±5%]

1266.90 with VAT / pcs + price for transport

1030.00 ZŁ net + 23% VAT / pcs

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Physical properties - SM 32x425 [2xM8] / N42 - magnetic separator

Specification / characteristics - SM 32x425 [2xM8] / N42 - magnetic separator

properties
properties values
Cat. no. 130380
GTIN/EAN 5906301813286
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 425 mm [±1 mm]
Weight 2280 g
Material Type Stainless steel AISI 304 / A2
Magnetic Flux ~ 8 000 Gauss [±5%]
Size/Mount Quantity 2xM8
Polarity circumferential - 16 poles
Casing Tube Thickness 1 mm
Manufacturing Tolerance ±1 mm

Magnetic properties of material N42

Specification / characteristics SM 32x425 [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 32x425 [2xM8] / N42

Parameter Value Description / Unit
Diameter (Ø) 32 mm
Total length 425 mm (L)
Active length 389 mm
Section count 16 modules
Dead zone 36 mm (2x 18mm starter)
Weight (est.) ~2598 g
Active area 391 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)

Chart 2: Field profile (16 sections)

Chart 3: Temperature performance

Technical specification and ecology
Elemental analysis
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: 130380-2026
Measurement Calculator
Force (pull)

Magnetic Field

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A magnetic rod is the basic element of building grate separators and magnetic filters. 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 rod consists of a cover tube made of high-quality acid-resistant steel (AISI 304 or 316). The center is filled with NdFeB magnets and pole pieces, arranged to maximize the field on the tube surface. 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. The most effective home method is using adhesive tape, which we wrap around the dirt and peel off. 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. For the food and precision industry, we recommend the highest induction parameters.
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.

Strengths as well as weaknesses of neodymium magnets.

Strengths

In addition to their magnetic efficiency, neodymium magnets provide the following advantages:
  • They have unchanged lifting capacity, and over more than 10 years their performance decreases symbolically – ~1% (in testing),
  • Magnets very well protect themselves against demagnetization caused by external fields,
  • In other words, due to the reflective finish of silver, the element becomes visually attractive,
  • The surface of neodymium magnets generates a concentrated magnetic field – this is a distinguishing feature,
  • Through (adequate) combination of ingredients, they can achieve high thermal resistance, enabling functioning at temperatures approaching 230°C and above...
  • Thanks to versatility in forming and the ability to customize to individual projects,
  • Significant place in advanced technology sectors – they are commonly used in data components, electromotive mechanisms, medical equipment, also multitasking production systems.
  • Compactness – despite small sizes they offer powerful magnetic field, making them ideal for precision applications

Weaknesses

Disadvantages of NdFeB magnets:
  • At very strong impacts they can break, therefore we recommend placing them in special holders. A metal housing provides additional protection against damage, as well as increases the magnet's durability.
  • NdFeB magnets demagnetize when exposed to high temperatures. After reaching 80°C, many of them experience permanent weakening of power (a factor is the shape and dimensions of the magnet). We offer magnets specially adapted to work at temperatures up to 230°C marked [AH], which are extremely resistant to heat
  • Magnets exposed to a humid environment can corrode. Therefore while using outdoors, we suggest using waterproof magnets made of rubber, plastic or other material resistant to moisture
  • Limited possibility of making nuts in the magnet and complicated forms - preferred is casing - magnet mounting.
  • Health risk related to microscopic parts of magnets are risky, in case of ingestion, which becomes key in the context of child safety. It is also worth noting that tiny parts of these devices can complicate diagnosis medical when they are in the body.
  • High unit price – neodymium magnets cost more than other types of magnets (e.g. ferrite), which can limit application in large quantities

Holding force characteristics

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

Information about lifting capacity is the result of a measurement for the most favorable conditions, including:
  • on a block made of structural steel, effectively closing the magnetic field
  • whose thickness reaches at least 10 mm
  • characterized by even structure
  • with direct contact (no paint)
  • during pulling in a direction vertical to the mounting surface
  • in stable room temperature

Determinants of lifting force in real conditions

Real force impacted by specific conditions, including (from priority):
  • Distance (betwixt the magnet and the metal), since even a microscopic clearance (e.g. 0.5 mm) can cause a reduction in lifting capacity by up to 50% (this also applies to varnish, rust or dirt).
  • Force direction – declared lifting capacity refers to detachment vertically. When slipping, the magnet exhibits much less (often approx. 20-30% of maximum force).
  • Wall thickness – thin material does not allow full use of the magnet. Magnetic flux passes through the material instead of generating force.
  • Material type – ideal substrate is high-permeability steel. Hardened steels may generate lower lifting capacity.
  • Plate texture – ground elements guarantee perfect abutment, which improves force. Rough surfaces weaken the grip.
  • Temperature influence – high temperature weakens pulling force. Exceeding the limit temperature can permanently damage the magnet.

Holding force was tested on a smooth steel plate of 20 mm thickness, when a perpendicular force was applied, however under attempts to slide the magnet the load capacity is reduced by as much as 75%. In addition, even a small distance between the magnet and the plate decreases the holding force.

Safe handling of NdFeB magnets
Power loss in heat

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

Beware of splinters

Despite metallic appearance, the material is delicate and not impact-resistant. Avoid impacts, as the magnet may crumble into sharp, dangerous pieces.

Dust is flammable

Mechanical processing of NdFeB material poses a fire hazard. Magnetic powder oxidizes rapidly with oxygen and is hard to extinguish.

Safe distance

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

Phone sensors

Remember: neodymium magnets produce a field that disrupts sensitive sensors. Maintain a separation from your phone, device, and navigation systems.

Choking Hazard

Adult use only. Small elements can be swallowed, causing serious injuries. Store away from children and animals.

Conscious usage

Use magnets with awareness. Their huge power can shock even experienced users. Plan your moves and do not underestimate their power.

Warning for allergy sufferers

It is widely known that the nickel plating (the usual finish) is a potent allergen. If your skin reacts to metals, refrain from direct skin contact or choose coated magnets.

Warning for heart patients

Medical warning: Strong magnets can deactivate pacemakers and defibrillators. Stay away if you have medical devices.

Physical harm

Large magnets can break fingers instantly. Do not put your hand betwixt two attracting surfaces.

Safety First! Details about hazards in the article: Safety of working with magnets.
Dhit sp. z o.o.

e-mail: bok@dhit.pl

tel: +48 888 99 98 98