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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%]

455.10 with VAT / pcs + price for transport

370.00 ZŁ net + 23% VAT / pcs

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Parameters and structure of a neodymium magnet can be verified using our modular calculator.

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Technical details - 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
remenance Br [min. - max.] ? 14.2-14.7 kGs
remenance Br [min. - max.] ? 1420-1470 mT
coercivity bHc ? 10.8-12.5 kOe
coercivity bHc ? 860-995 kA/m
actual internal force iHc ≥ 12 kOe
actual internal force iHc ≥ 955 kA/m
energy density [min. - max.] ? 48-53 BH max MGOe
energy density [min. - max.] ? 380-422 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 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 80°C Standard (N)
Force loss (at max °C) -12.8% Reversible loss (physics)
Force (calculated) 41 kg (theor.)
Induction (surface) ~10 000 Gauss (Max)

Chart 2: Field profile (3 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%
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: 130357-2026
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Magnet pull force

Magnetic Field

Check out more proposals

A magnetic rod is the basic element of building grate separators and magnetic filters. 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). 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. 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

In addition to their long-term stability, neodymium magnets provide the following advantages:
  • They have constant strength, and over around ten years their performance decreases symbolically – ~1% (according to theory),
  • They maintain their magnetic properties even under external field action,
  • By applying a lustrous coating of silver, the element gains an professional look,
  • Neodymium magnets deliver maximum magnetic induction on a small area, which allows for strong attraction,
  • Through (adequate) combination of ingredients, they can achieve high thermal strength, enabling action at temperatures reaching 230°C and above...
  • Possibility of individual shaping and optimizing to atypical applications,
  • Versatile presence in modern industrial fields – they are utilized in mass storage devices, motor assemblies, medical devices, as well as industrial machines.
  • Relatively small size with high pulling force – neodymium magnets offer strong magnetic field in compact dimensions, which makes them useful in compact constructions

Weaknesses

What to avoid - cons of neodymium magnets: weaknesses and usage proposals
  • To avoid cracks upon strong impacts, we suggest using special steel housings. Such a solution secures the magnet and simultaneously increases its durability.
  • Neodymium magnets lose force when exposed to high temperatures. After reaching 80°C, many of them experience permanent weakening of strength (a factor is the shape as well as dimensions of the magnet). We offer magnets specially adapted to work at temperatures up to 230°C marked [AH], which are very resistant to heat
  • Due to the susceptibility of magnets to corrosion in a humid environment, we suggest using waterproof magnets made of rubber, plastic or other material resistant to moisture, when using outdoors
  • Due to limitations in creating nuts and complex forms in magnets, we propose using cover - magnetic mount.
  • Health risk related to microscopic parts of magnets pose a threat, when accidentally swallowed, which gains importance in the aspect of protecting the youngest. It is also worth noting that tiny parts of these devices are able to disrupt the diagnostic process medical in case of swallowing.
  • Higher cost of purchase is a significant factor to consider compared to ceramic magnets, especially in budget applications

Lifting parameters

Detachment force of the magnet in optimal conditionswhat it depends on?

The declared magnet strength concerns the limit force, measured under optimal environment, namely:
  • with the contact of a yoke made of special test steel, ensuring maximum field concentration
  • possessing a thickness of minimum 10 mm to avoid saturation
  • characterized by lack of roughness
  • with direct contact (no coatings)
  • for force applied at a right angle (in the magnet axis)
  • at temperature approx. 20 degrees Celsius

Lifting capacity in real conditions – factors

Real force impacted by working environment parameters, such as (from most important):
  • Distance – the presence of any layer (paint, tape, air) acts as an insulator, which reduces power rapidly (even by 50% at 0.5 mm).
  • Angle of force application – maximum parameter is reached only during perpendicular pulling. The force required to slide of the magnet along the surface is standardly many times smaller (approx. 1/5 of the lifting capacity).
  • Metal thickness – thin material does not allow full use of the magnet. Part of the magnetic field penetrates through instead of converting into lifting capacity.
  • Chemical composition of the base – mild steel gives the best results. Alloy steels lower magnetic properties and lifting capacity.
  • Plate texture – ground elements ensure maximum contact, which improves force. Rough surfaces weaken the grip.
  • Temperature influence – high temperature weakens pulling force. Too high temperature can permanently damage the magnet.

Lifting capacity was determined by applying a steel plate with a smooth surface of suitable thickness (min. 20 mm), under vertically applied force, in contrast under attempts to slide the magnet the lifting capacity is smaller. In addition, even a slight gap between the magnet and the plate lowers the load capacity.

Warnings
Operating temperature

Regular neodymium magnets (grade N) lose power when the temperature exceeds 80°C. The loss of strength is permanent.

Do not underestimate power

Exercise caution. Rare earth magnets attract from a long distance and snap with massive power, often quicker than you can react.

Life threat

Patients with a heart stimulator have to maintain an large gap from magnets. The magnetic field can interfere with the operation of the implant.

No play value

NdFeB magnets are not intended for children. Accidental ingestion of several magnets may result in them pinching intestinal walls, which poses a direct threat to life and requires urgent medical intervention.

Bodily injuries

Big blocks can smash fingers in a fraction of a second. Do not place your hand between two strong magnets.

Precision electronics

GPS units and smartphones are extremely sensitive to magnetism. Close proximity with a powerful NdFeB magnet can decalibrate the internal compass in your phone.

Electronic hazard

Avoid bringing magnets close to a purse, laptop, or TV. The magnetism can permanently damage these devices and wipe information from cards.

Dust explosion hazard

Machining of NdFeB material carries a risk of fire hazard. Neodymium dust oxidizes rapidly with oxygen and is hard to extinguish.

Fragile material

Neodymium magnets are ceramic materials, meaning they are fragile like glass. Collision of two magnets will cause them breaking into shards.

Avoid contact if allergic

Warning for allergy sufferers: The nickel-copper-nickel coating contains nickel. If skin irritation occurs, immediately stop working with magnets and wear gloves.

Danger! Want to know more? Check our post: Why are neodymium magnets dangerous?