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SM 32x125 [2xM8] / N52 - magnetic separator

magnetic separator

Catalog no 130357

GTIN/EAN: 5906301813057

Diameter Ø
32 mm [±1 mm]
Height
125 mm [±1 mm]
Weight
690 g
Magnetic Flux
~ 10 000 Gauss [±5%]

How we measure these parameters — certificates and measurements

technical specifications »

470.00 zł net / pcs

578.10 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 specification - SM 32x125 [2xM8] / N52 - magnetic separator

Specification / characteristics - SM 32x125 [2xM8] / N52 - magnetic separator

properties
properties values
Cat. no. 130357
GTIN/EAN 5906301813057
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 125 mm [±1 mm]
Weight 690 g
Material Type Stainless steel AISI 304 / A2
Magnetic Flux ~ 10 000 Gauss [±5%]
Size/Mount Quantity 2xM8
Polarity circumferential - 4 poles
Casing Tube Thickness 1 mm
Manufacturing Tolerance ±1 mm

Magnetic properties of material N52

Specification / characteristics SM 32x125 [2xM8] / N52 - magnetic separator
properties values units
Remanence Br ? 14.2-14.7 kGs
Remanence Br ? 1420-1470 mT
Coercivity bHc ? 10.8-12.5 kOe
Coercivity bHc ? 860-995 kA/m
Intrinsic coercivity iHc ≥ 12 kOe
Intrinsic coercivity iHc ≥ 955 kA/m
Energy product BHmax ? 48-53 BH max MGOe
Energy product BHmax ? 380-422 BH max KJ/m
Maximum working temperature ? ≤ 60 °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 32x125 [2xM8] / N52

Parameter Value Description / Unit
Diameter (Ø) 32 mm
Total length 125 mm (L)
Active length 89 mm
Section count 3 modules
Dead zone 36 mm (2x 18mm starter)
Weight (est.) ~764 g
Active area 89 cm² (Area)
Housing material AISI 304 1.4301 (Inox)
Surface finish Ra < 0.8 µm Polished
Temp. class 60°C N52
Force loss (at max °C) -8.6% Reversible loss (physics)
Force (calculated) 41 kg (theor.)
Induction (surface) ~10 000 Gauss (Max)
Max T = 60°C. Construction data for M8/M10 thread series.

Chart 2: Field profile (3 sections)

Simulation: 3 magnetic modules (pitch 23 mm).

Chart 3: Temperature performance

Engineering data and GPSR

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: 130357-2026
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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 rod consists of a cover tube made of high-quality acid-resistant steel (AISI 304 or 316). 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.
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). In industry, cover tubes (so-called Easy Clean system) are used, from which the magnetic insert slides out.
The more Gauss, the smaller and more weakly magnetic particles will be effectively caught. For basic machine protection against pieces of iron, standard power is sufficient. 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). You can choose a mounting method consistent with your technical design. We ensure fast realization of special orders and technical advice.

Pros as well as cons of neodymium magnets.

Advantages

Apart from their superior power, neodymium magnets have these key benefits:
  • They have unchanged lifting capacity, and over nearly ten years their performance decreases symbolically – ~1% (in testing),
  • They are resistant to demagnetization induced by presence of other magnetic fields,
  • In other words, due to the smooth layer of nickel, the element is aesthetically pleasing,
  • Neodymium magnets ensure maximum magnetic induction on a small surface, which ensures high operational effectiveness,
  • Through (adequate) combination of ingredients, they can achieve high thermal resistance, allowing for action at temperatures approaching 230°C and above...
  • Thanks to freedom in shaping and the capacity to modify to unusual requirements,
  • Key role in advanced technology sectors – they are utilized in hard drives, drive modules, medical devices, also other advanced devices.
  • Compactness – despite small sizes they provide effective action, making them ideal for precision applications

Limitations

Disadvantages of NdFeB magnets:
  • Brittleness is one of their disadvantages. Upon strong impact they can break. We recommend keeping them in a steel housing, which not only protects them against impacts but also increases their durability
  • Do not exceed this material temperature limit: 60°C. Overheating may permanently weaken the magnet.
  • When exposed to humidity, magnets usually rust. To use them in conditions outside, it is recommended to use protective magnets, such as magnets in rubber or plastics, which prevent oxidation and corrosion.
  • Due to limitations in creating nuts and complex forms in magnets, we recommend using casing - magnetic mechanism.
  • Potential hazard resulting from small fragments of magnets pose a threat, if swallowed, which gains importance in the context of child safety. Additionally, small components of these products can be problematic in diagnostics medical when they are in the body.
  • Higher cost of purchase is one of the disadvantages compared to ceramic magnets, especially in budget applications

Pull force analysis

Detachment force of the magnet in optimal conditions – what it depends on?

The declared magnet strength concerns the peak performance, measured under ideal test conditions, namely:
  • on a plate made of mild steel, effectively closing the magnetic flux
  • whose transverse dimension reaches at least 10 mm
  • with a plane cleaned and smooth
  • with direct contact (without coatings)
  • during detachment in a direction vertical to the plane
  • at standard ambient temperature

Magnet lifting force in use – key factors

In real-world applications, the actual lifting capacity depends on many variables, listed from most significant:
  • Clearance – existence of any layer (paint, dirt, air) acts as an insulator, which lowers power steeply (even by 50% at 0.5 mm).
  • Direction of force – maximum parameter is available only during pulling at a 90° angle. The resistance to sliding of the magnet along the plate is standardly several times smaller (approx. 1/5 of the lifting capacity).
  • Wall thickness – thin material does not allow full use of the magnet. Part of the magnetic field passes through the material instead of converting into lifting capacity.
  • Material composition – different alloys attracts identically. Alloy additives worsen the interaction with the magnet.
  • Surface structure – the smoother and more polished the plate, the larger the contact zone and stronger the hold. Unevenness creates an air distance.
  • Thermal factor – high temperature weakens magnetic field. Exceeding the limit temperature can permanently demagnetize the magnet.

Lifting capacity testing was carried out on plates with a smooth surface of suitable thickness, under a perpendicular pulling force, however under shearing force the lifting capacity is smaller. Additionally, even a slight gap between the magnet’s surface and the plate reduces the lifting capacity.

Precautions when working with neodymium magnets
Maximum temperature

Control the heat. Heating the magnet to high heat will destroy its magnetic structure and pulling force.

Product not for children

Adult use only. Tiny parts pose a choking risk, causing intestinal necrosis. Keep away from children and animals.

Nickel allergy

Warning for allergy sufferers: The nickel-copper-nickel coating contains nickel. If redness occurs, cease working with magnets and use protective gear.

Electronic devices

Data protection: Strong magnets can damage payment cards and delicate electronics (pacemakers, medical aids, mechanical watches).

Compass and GPS

Navigation devices and smartphones are highly sensitive to magnetic fields. Close proximity with a powerful NdFeB magnet can decalibrate the internal compass in your phone.

Material brittleness

Neodymium magnets are ceramic materials, which means they are prone to chipping. Clashing of two magnets will cause them cracking into shards.

Pinching danger

Big blocks can smash fingers in a fraction of a second. Under no circumstances put your hand between two attracting surfaces.

Do not drill into magnets

Powder generated during machining of magnets is self-igniting. Avoid drilling into magnets without proper cooling and knowledge.

Warning for heart patients

Individuals with a pacemaker have to maintain an large gap from magnets. The magnetism can stop the functioning of the life-saving device.

Conscious usage

Use magnets consciously. Their powerful strength can shock even professionals. Stay alert and respect their power.

Danger! Need more info? Check our post: Why are neodymium magnets dangerous?