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SM 32x475 [2xM8] / N42 - magnetic separator

magnetic separator

Catalog no 130377

GTIN/EAN: 5906301813255

5.00

Diameter Ø

32 mm [±1 mm]

Height

475 mm [±1 mm]

Weight

2545 g

Magnetic Flux

~ 8 000 Gauss [±5%]

technical details »

1414.50 ZŁ with VAT / pcs + price for transport

1150.00 ZŁ net + 23% VAT / pcs

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Strength as well as structure of magnets can be analyzed on our force calculator.

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Technical specification of the product - SM 32x475 [2xM8] / N42 - magnetic separator

Specification / characteristics - SM 32x475 [2xM8] / N42 - magnetic separator

properties
properties values
Cat. no. 130377
GTIN/EAN 5906301813255
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 475 mm [±1 mm]
Weight 2545 g
Material Type Stainless steel AISI 304 / A2
Magnetic Flux ~ 8 000 Gauss [±5%]
Size/Mount Quantity 2xM8
Polarity circumferential - 18 poles
Casing Tube Thickness 1 mm
Manufacturing Tolerance ±1 mm

Magnetic properties of material N42

Specification / characteristics SM 32x475 [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 32x475 [2xM8] / N42

Parameter Value Description / Unit
Diameter (Ø) 32 mm
Total length 475 mm (L)
Active length 439 mm
Section count 19 modules
Dead zone 36 mm (2x 18mm starter)
Weight (est.) ~2903 g
Active area 441 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 (19 sections)

Simulation: 19 magnetic modules (pitch 23 mm).

Chart 3: Temperature performance

Technical and environmental data
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%
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: 130377-2026
Magnet Unit Converter
Magnet pull force
Field Strength
Type your figure into any field, to see the remaining units will convert in real-time.

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It is the "heart" of every magnetic filter used in industry for cleaning raw materials. 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. 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. We recommend sticking packing tape to the cluster of filings and tearing it off together with the contaminants. 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. For basic machine protection against pieces of iron, standard power is sufficient. 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. The rod end is strictly adapted to the fastening system in your device. We ensure fast realization of special orders and technical advice.

Pros and cons of Nd2Fe14B magnets.

Pros

Apart from their superior magnetic energy, neodymium magnets have these key benefits:
  • They do not lose magnetism, even during approximately 10 years – the reduction in strength is only ~1% (according to tests),
  • Magnets very well resist against loss of magnetization caused by foreign field sources,
  • A magnet with a smooth nickel surface has an effective appearance,
  • Magnetic induction on the surface of the magnet remains very high,
  • Made from properly selected components, these magnets show impressive resistance to high heat, enabling them to function (depending on their form) at temperatures up to 230°C and above...
  • Possibility of exact creating and adapting to atypical conditions,
  • Versatile presence in high-tech industry – they serve a role in computer drives, motor assemblies, precision medical tools, also other advanced devices.
  • Thanks to efficiency per cm³, small magnets offer high operating force, occupying minimum space,

Weaknesses

Disadvantages of NdFeB magnets:
  • At strong impacts they can crack, therefore we recommend placing them in steel cases. A metal housing provides additional protection against damage and increases the magnet's durability.
  • When exposed to high temperature, neodymium magnets suffer a drop in force. Often, when the temperature exceeds 80°C, their strength decreases (depending on the size and shape of the magnet). For those who need magnets for extreme conditions, we offer [AH] versions withstanding up to 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 immune to moisture, when using outdoors
  • Limited ability of making nuts in the magnet and complicated shapes - recommended is cover - magnet mounting.
  • Health risk resulting from small fragments of magnets can be dangerous, in case of ingestion, which gains importance in the context of child safety. It is also worth noting that small components of these devices can complicate diagnosis medical when they are in the body.
  • Due to complex production process, their price is higher than average,

Holding force characteristics

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

Breakaway force is the result of a measurement for ideal contact conditions, assuming:
  • using a sheet made of high-permeability steel, serving as a circuit closing element
  • with a cross-section no less than 10 mm
  • characterized by lack of roughness
  • with total lack of distance (without coatings)
  • under perpendicular force vector (90-degree angle)
  • at temperature room level

Practical lifting capacity: influencing factors

Effective lifting capacity is influenced by working environment parameters, mainly (from priority):
  • Distance – the presence of any layer (rust, tape, gap) acts as an insulator, which reduces capacity steeply (even by 50% at 0.5 mm).
  • Force direction – remember that the magnet holds strongest perpendicularly. Under sliding down, the capacity drops significantly, often to levels of 20-30% of the maximum value.
  • Metal thickness – thin material does not allow full use of the magnet. Part of the magnetic field penetrates through instead of generating force.
  • Material type – ideal substrate is pure iron steel. Hardened steels may attract less.
  • Smoothness – full contact is possible only on smooth steel. Any scratches and bumps reduce the real contact area, reducing force.
  • Thermal conditions – NdFeB sinters have a negative temperature coefficient. At higher temperatures they lose power, and in frost they can be stronger (up to a certain limit).

Lifting capacity testing was conducted on a smooth plate of suitable thickness, under perpendicular forces, whereas under shearing force the lifting capacity is smaller. Additionally, even a slight gap between the magnet’s surface and the plate decreases the load capacity.

H&S for magnets
Magnet fragility

Protect your eyes. Magnets can fracture upon uncontrolled impact, launching sharp fragments into the air. We recommend safety glasses.

Swallowing risk

NdFeB magnets are not suitable for play. Swallowing multiple magnets may result in them attracting across intestines, which constitutes a critical condition and necessitates urgent medical intervention.

Crushing risk

Large magnets can crush fingers in a fraction of a second. Under no circumstances put your hand betwixt two attracting surfaces.

Immense force

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

Avoid contact if allergic

A percentage of the population experience a contact allergy to nickel, which is the standard coating for NdFeB magnets. Extended handling can result in dermatitis. We recommend use safety gloves.

Implant safety

For implant holders: Powerful magnets disrupt electronics. Keep minimum 30 cm distance or request help to handle the magnets.

Combustion hazard

Fire hazard: Neodymium dust is highly flammable. Do not process magnets without safety gear as this may cause fire.

Protect data

Do not bring magnets near a wallet, laptop, or screen. The magnetism can permanently damage these devices and erase data from cards.

Maximum temperature

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

Impact on smartphones

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

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