Strong neodymium magnets: discs and cylinders

Need strong magnetic field? We have in stock rich assortment of disc, cylindrical and ring magnets. Best choice for home use, workshop and industrial tasks. See products in stock.

check magnet catalog

Magnets for underwater searches

Start your adventure related to seabed exploration! Our specialized grips (F200, F400) provide grip certainty and immense power. Stainless steel construction and strong lines will perform in any water.

find your set

Magnetic mounts for industry

Reliable solutions for mounting non-invasive. Threaded mounts (M8, M10, M12) provide instant organization of work on warehouses. They are indispensable mounting lamps, detectors and ads.

check available threads

📦 Fast shipping: buy by 14:00, we'll ship today!

Dhit sp. z o.o.
Product available Ships tomorrow

SM 32x300 [2xM8] / N52 - magnetic separator

magnetic separator

Catalog no 130459

GTIN/EAN: 5906301813309

Diameter Ø

32 mm [±1 mm]

Height

300 mm [±1 mm]

Weight

1660 g

Magnetic Flux

~ 10 000 Gauss [±5%]

971.70 with VAT / pcs + price for transport

790.00 ZŁ net + 23% VAT / pcs

bulk discounts:

Need more?

price from 1 pcs
790.00 ZŁ
971.70 ZŁ
price from 5 pcs
750.50 ZŁ
923.12 ZŁ
price from 10 pcs
711.00 ZŁ
874.53 ZŁ
Need advice?

Call us now +48 888 99 98 98 alternatively let us know by means of inquiry form through our site.
Weight along with structure of a neodymium magnet can be analyzed on our force calculator.

Same-day processing for orders placed before 14:00.

Technical - SM 32x300 [2xM8] / N52 - magnetic separator

Specification / characteristics - SM 32x300 [2xM8] / N52 - magnetic separator

properties
properties values
Cat. no. 130459
GTIN/EAN 5906301813309
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 300 mm [±1 mm]
Weight 1660 g
Material Type Stainless steel AISI 304 / A2
Magnetic Flux ~ 10 000 Gauss [±5%]
Size/Mount Quantity 2xM8
Polarity circumferential - 11 poles
Casing Tube Thickness 1 mm
Manufacturing Tolerance ±1 mm

Magnetic properties of material N52

Specification / characteristics SM 32x300 [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 32x300 [2xM8] / N52

Parameter Value Description / Unit
Diameter (Ø) 32 mm
Total length 300 mm (L)
Active length 264 mm
Section count 11 modules
Dead zone 36 mm (2x 18mm starter)
Weight (est.) ~1834 g
Active area 265 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 (11 sections)

Chart 3: Temperature performance

Engineering data and GPSR
Material specification
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%
Sustainability
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: 130459-2026
Measurement Calculator
Magnet pull force

Magnetic Induction

Other products

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 outer layer is hygienic acid-resistant steel, approved for food contact. The core is a precise magnetic system generating high induction (Gauss). 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. 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.
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 induction is necessary when contaminants are microscopic or weakly magnetic.
We fulfill individual orders for bars perfectly matched to your machine or separator. 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.

Pros and cons of rare earth magnets.

Strengths

In addition to their pulling strength, neodymium magnets provide the following advantages:
  • Their power is durable, and after approximately ten years it drops only by ~1% (theoretically),
  • Neodymium magnets are exceptionally resistant to magnetic field loss caused by external field sources,
  • In other words, due to the shiny finish of gold, the element gains a professional look,
  • They are known for high magnetic induction at the operating surface, making them more effective,
  • Through (adequate) combination of ingredients, they can achieve high thermal strength, enabling functioning at temperatures approaching 230°C and above...
  • Possibility of detailed machining and adjusting to concrete conditions,
  • Versatile presence in modern industrial fields – they are commonly used in data components, motor assemblies, diagnostic systems, as well as industrial machines.
  • Relatively small size with high pulling force – neodymium magnets offer impressive pulling force in compact dimensions, which enables their usage in compact constructions

Limitations

Disadvantages of neodymium magnets:
  • Susceptibility to cracking is one of their disadvantages. Upon strong impact they can fracture. We recommend keeping them in a steel housing, which not only protects them against impacts but also raises their durability
  • Neodymium magnets decrease their strength under the influence of heating. As soon as 80°C is exceeded, many of them start losing their force. Therefore, we recommend our special magnets marked [AH], which maintain stability even at temperatures up to 230°C
  • Due to the susceptibility of magnets to corrosion in a humid environment, we recommend using waterproof magnets made of rubber, plastic or other material stable to moisture, in case of application outdoors
  • Due to limitations in producing threads and complex forms in magnets, we propose using cover - magnetic holder.
  • Possible danger resulting from small fragments of magnets pose a threat, when accidentally swallowed, which becomes key in the context of child health protection. It is also worth noting that tiny parts of these products can disrupt the diagnostic process medical when they are in the body.
  • With budget limitations the cost of neodymium magnets can be a barrier,

Pull force analysis

Magnetic strength at its maximum – what affects it?

Holding force of 0.00 kg is a measurement result executed under the following configuration:
  • with the use of a yoke made of special test steel, guaranteeing full magnetic saturation
  • possessing a thickness of minimum 10 mm to avoid saturation
  • with a surface free of scratches
  • under conditions of gap-free contact (surface-to-surface)
  • under vertical force direction (90-degree angle)
  • at temperature approx. 20 degrees Celsius

Determinants of lifting force in real conditions

Real force impacted by specific conditions, such as (from priority):
  • Distance (betwixt the magnet and the metal), since even a tiny clearance (e.g. 0.5 mm) results in a decrease in lifting capacity by up to 50% (this also applies to varnish, corrosion or debris).
  • Loading method – declared lifting capacity refers to pulling vertically. When applying parallel force, the magnet exhibits significantly lower power (often approx. 20-30% of nominal force).
  • 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 reacts the same. High carbon content weaken the interaction with the magnet.
  • Base smoothness – the smoother and more polished the surface, the larger the contact zone and higher the lifting capacity. Unevenness acts like micro-gaps.
  • Operating temperature – NdFeB sinters have a sensitivity to temperature. At higher temperatures they lose power, and in frost they can be stronger (up to a certain limit).

Holding force was tested on the plate surface of 20 mm thickness, when the force acted perpendicularly, however under parallel forces the lifting capacity is smaller. Moreover, even a small distance between the magnet and the plate decreases the lifting capacity.

Precautions when working with neodymium magnets
Material brittleness

Neodymium magnets are ceramic materials, which means they are prone to chipping. Impact of two magnets leads to them cracking into shards.

GPS Danger

Be aware: rare earth magnets produce a field that confuses precision electronics. Maintain a safe distance from your phone, device, and navigation systems.

Fire risk

Fire warning: Neodymium dust is explosive. Do not process magnets without safety gear as this may cause fire.

Heat warning

Avoid heat. NdFeB magnets are sensitive to heat. If you require operation above 80°C, ask us about HT versions (H, SH, UH).

Allergic reactions

Warning for allergy sufferers: The nickel-copper-nickel coating consists of nickel. If redness appears, cease handling magnets and use protective gear.

Choking Hazard

NdFeB magnets are not suitable for play. Eating several magnets can lead to them connecting inside the digestive tract, which constitutes a severe health hazard and requires immediate surgery.

Bodily injuries

Large magnets can smash fingers in a fraction of a second. Do not put your hand betwixt two attracting surfaces.

Powerful field

Handle magnets consciously. Their huge power can shock even experienced users. Stay alert and respect their power.

Threat to electronics

Equipment safety: Strong magnets can damage data carriers and delicate electronics (heart implants, hearing aids, mechanical watches).

ICD Warning

Health Alert: Neodymium magnets can deactivate pacemakers and defibrillators. Do not approach if you have electronic implants.

Warning! Looking for details? Read our article: Are neodymium magnets dangerous?
Dhit sp. z o.o.

e-mail: bok@dhit.pl

tel: +48 888 99 98 98