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SM 18x300 [2xM5] / N42 - magnetic separator

magnetic separator

Catalog no 130277

GTIN/EAN: 5906301812791

Diameter Ø
18 mm [±1 mm]
Height
300 mm [±1 mm]
Weight
0.01 g
Magnetic Flux
~ 5 400 Gauss [±5%]

How we measure these parameters — certificates and measurements

product specifications »

540.00 zł net / pcs

664.20 zł with VAT (23% VAT) / pcs

price for transport

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Frequently asked questions

How do I choose a separator for fine contamination and check availability?
Start with the size and type of contaminant, the material flow and the working surface. Compare the magnetic-field data and dimensions stated on the selected product card, and check current availability there.
Where can I order a separator for a production line, and what should I check?
Match the device to the installation dimensions, material flow, cleaning method and housing requirements. A drawing or the dimensions of the transfer point help determine whether a catalogue model fits or a custom version is needed.
How can I verify a separator's declared magnetic parameters before purchase?
Ask for the measured value, the point of measurement and the method or instrument used. A field-strength figure without its measurement conditions cannot be compared reliably with another product.
Can a magnetic beam withstand continuous work on a production line?
Check the construction, mounting and cleaning procedure for the chosen beam. Captured metal must be removed regularly; a layer of particles can reduce effective separation even when the magnets themselves are sound.
What roller design is suitable for a dusty environment?
Check the bearing protection, surface finish and cleaning access of the selected model. Dust accumulation and abrasion depend on the installation, so specify the actual process conditions before choosing a version.
How do I choose the size of a hand-held separator?
Match the rod diameter and length to the container and material depth, and consider the tool's weight for repeated manual work. Use the dimensions and magnetic data on the current product card.
What is a hand-held separator for, and how is it different from a built-in rod?
A built-in rod stays in the process line. A hand-held separator is moved through a material sample or container and then cleaned. It is useful for spot checks or occasional cleanup when permanent installation is not required.
Which separator type suits a small production plant?
Choose by the point in the process: a grate at a hopper, a beam over a conveyor, a built-in rod in a chute or pipe, or a hand-held tool for spot checks. A magnetic gripper handles steel parts rather than separating contamination.

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 details - SM 18x300 [2xM5] / N42 - magnetic separator

Specification / characteristics - SM 18x300 [2xM5] / N42 - magnetic separator

properties
properties values
Cat. no. 130277
GTIN/EAN 5906301812791
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 18 mm [±1 mm]
Height 300 mm [±1 mm]
Weight 0.01 g
Material Type Stainless steel AISI 304 / A2
Magnetic Flux ~ 5 400 Gauss [±5%]
Size/Mount Quantity 2xM5
Polarity circumferential - 13 poles
Casing Tube Thickness 1 mm
Manufacturing Tolerance ±1 mm

Magnetic properties of material N42

Specification / characteristics SM 18x300 [2xM5] / 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 18x300 [2xM5] / N42

Parameter Value Description / Unit
Diameter (Ø) 18 mm
Total length 300 mm (L)
Active length 264 mm
Section count 11 modules
Dead zone 36 mm (2x 18mm starter)
Weight (est.) ~580 g
Active area 149 cm² (Area)
Housing material AISI 304 1.4301 (Inox)
Surface finish Ra < 0.8 µm Polished
Temp. class 80°C N42
Force loss (at max °C) -12.8% Reversible loss (physics)
Force (calculated) 3.8 kg (theor.)
Induction (surface) ~5 400 Gauss (Max)
Max T = 80°C. Construction data for M8/M10 thread series.

Chart 2: Field profile (11 sections)

Simulation: 11 magnetic modules (pitch 23 mm).

Chart 3: Temperature performance

Technical and environmental data

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%

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: 130277-2026
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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 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. 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). For easier operation, it is worth considering ordering a rod in a version with a cleaning sleeve.
The Gauss value tells us how effectively and deeply the magnet will catch contaminants. For basic machine protection against pieces of iron, standard power is sufficient. For the food and precision industry, we recommend the highest induction parameters.
We fulfill individual orders for bars perfectly matched to your machine or separator. You can choose a mounting method consistent with your technical design. We ensure fast realization of special orders and technical advice.

Pros and cons of neodymium magnets.

Pros

Apart from their notable holding force, neodymium magnets have these key benefits:
  • Their strength is maintained, and after approximately ten years it drops only by ~1% (theoretically),
  • They do not lose their magnetic properties even under close interference source,
  • Thanks to the reflective finish, the surface of Ni-Cu-Ni, gold-plated, or silver-plated gives an professional appearance,
  • Magnets are distinguished by huge magnetic induction on the outer layer,
  • Through (appropriate) combination of ingredients, they can achieve high thermal resistance, allowing for operation at temperatures reaching 230°C and above...
  • Thanks to flexibility in shaping and the ability to adapt to individual projects,
  • Universal use in electronics industry – they are utilized in magnetic memories, electromotive mechanisms, advanced medical instruments, also technologically advanced constructions.
  • Thanks to their power density, small magnets offer high operating force, in miniature format,

Weaknesses

Disadvantages of neodymium magnets:
  • They are prone to damage upon too strong impacts. To avoid cracks, it is worth protecting magnets using a steel holder. Such protection not only shields the magnet but also improves its resistance to damage
  • Do not exceed this material temperature limit: 80°C. Overheating may permanently weaken the magnet.
  • Magnets exposed to a humid environment can corrode. Therefore when using outdoors, we recommend using water-impermeable magnets made of rubber, plastic or other material resistant to moisture
  • Due to limitations in realizing nuts and complicated forms in magnets, we propose using cover - magnetic holder.
  • Possible danger related to microscopic parts of magnets are risky, when accidentally swallowed, which is particularly important in the context of child health protection. It is also worth noting that tiny parts of these magnets can be problematic in diagnostics medical when they are in the body.
  • High unit price – neodymium magnets have a higher price than other types of magnets (e.g. ferrite), which can limit application in large quantities

Pull force analysis

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

Breakaway force is the result of a measurement for the most favorable conditions, taking into account:
  • with the application of a sheet made of special test steel, ensuring full magnetic saturation
  • with a cross-section minimum 10 mm
  • with a plane free of scratches
  • under conditions of gap-free contact (metal-to-metal)
  • under axial force direction (90-degree angle)
  • at temperature room level

Key elements affecting lifting force

Real force impacted by specific conditions, mainly (from most important):
  • Clearance – existence of any layer (paint, dirt, air) acts as an insulator, which lowers power steeply (even by 50% at 0.5 mm).
  • Force direction – note that the magnet holds strongest perpendicularly. Under shear forces, the capacity drops drastically, often to levels of 20-30% of the nominal value.
  • Metal thickness – thin material does not allow full use of the magnet. Part of the magnetic field passes through the material instead of generating force.
  • Metal type – different alloys attracts identically. High carbon content weaken the attraction effect.
  • Surface condition – ground elements ensure maximum contact, which improves force. Uneven metal weaken the grip.
  • Temperature – temperature increase results in weakening of induction. It is worth remembering the thermal limit for a given model.

Lifting capacity testing was conducted on a smooth plate of suitable thickness, under a perpendicular pulling force, in contrast under shearing force the load capacity is reduced by as much as 75%. In addition, even a minimal clearance between the magnet’s surface and the plate lowers the holding force.

H&S for magnets
Cards and drives

Intense magnetic fields can erase data on credit cards, hard drives, and storage devices. Keep a distance of min. 10 cm.

Machining danger

Dust created during machining of magnets is flammable. Avoid drilling into magnets without proper cooling and knowledge.

Crushing risk

Pinching hazard: The pulling power is so immense that it can cause blood blisters, pinching, and broken bones. Use thick gloves.

Impact on smartphones

Note: neodymium magnets produce a field that interferes with sensitive sensors. Maintain a separation from your mobile, tablet, and navigation systems.

Shattering risk

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

Maximum temperature

Regular neodymium magnets (N-type) lose magnetization when the temperature exceeds 80°C. This process is irreversible.

Powerful field

Be careful. Rare earth magnets act from a distance and connect with massive power, often quicker than you can move away.

ICD Warning

Health Alert: Neodymium magnets can deactivate pacemakers and defibrillators. Stay away if you have electronic implants.

No play value

NdFeB magnets are not suitable for play. Swallowing several magnets may result in them pinching intestinal walls, which poses a severe health hazard and necessitates urgent medical intervention.

Avoid contact if allergic

Certain individuals suffer from a contact allergy to nickel, which is the common plating for neodymium magnets. Prolonged contact may cause a rash. It is best to wear safety gloves.

Attention! Looking for details? Read our article: Why are neodymium magnets dangerous?