tel: +48 888 99 98 98

Powerful neodymium magnets: discs and cylinders

Want to buy really powerful magnets? Our range includes wide selection of disc, cylindrical and ring magnets. Best choice for home use, garage and industrial tasks. Browse assortment with fast shipping.

check full offer

Magnets for underwater searches

Discover your passion related to seabed exploration! Our specialized grips (F200, F400) provide grip certainty and huge lifting capacity. Solid, corrosion-resistant housing and strong lines are reliable in challenging water conditions.

choose searching equipment

Reliable threaded grips

Reliable solutions for fixing without drilling. Threaded grips (external or internal) provide instant organization of work on warehouses. Perfect for mounting lamps, sensors and banners.

see industrial applications

🚀 Lightning processing: orders by 14:00 shipped within 24h!

Dhit sp. z o.o.
Product available Ships today (order by 14:00)

SM 32x425 [2xM8] / N42 - magnetic separator

magnetic separator

Catalog no 130380

GTIN/EAN: 5906301813286

Diameter Ø

32 mm [±1 mm]

Height

425 mm [±1 mm]

Weight

2280 g

Magnetic Flux

~ 8 000 Gauss [±5%]

1266.90 with VAT / pcs + price for transport

1030.00 ZŁ net + 23% VAT / pcs

bulk discounts:

Need more?

price from 1 pcs
1030.00 ZŁ
1266.90 ZŁ
price from 5 pcs
927.00 ZŁ
1140.21 ZŁ
Hunting for a discount?

Call us now +48 22 499 98 98 or send us a note via form the contact section.
Lifting power as well as shape of magnetic components can be analyzed using our magnetic mass calculator.

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

Technical details - SM 32x425 [2xM8] / N42 - magnetic separator

Specification / characteristics - SM 32x425 [2xM8] / N42 - magnetic separator

properties
properties values
Cat. no. 130380
GTIN/EAN 5906301813286
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 425 mm [±1 mm]
Weight 2280 g
Material Type Stainless steel AISI 304 / A2
Magnetic Flux ~ 8 000 Gauss [±5%]
Size/Mount Quantity 2xM8
Polarity circumferential - 16 poles
Casing Tube Thickness 1 mm
Manufacturing Tolerance ±1 mm

Magnetic properties of material N42

Specification / characteristics SM 32x425 [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
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%
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: 130380-2025
Quick Unit Converter
Force (pull)

Magnetic Field

Check out also offers

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. Thanks to the use of strong neodymium magnets, the rod catches even metallic dust.
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). Thanks to this, the rod is durable, hygienic, and easy to keep clean.
Due to the high power of the magnet, direct removal of filings can be troublesome and time-consuming. We recommend sticking packing tape to the cluster of filings and tearing it off together with the contaminants. For easier operation, it is worth considering ordering a rod in a version with a cleaning sleeve.
The more Gauss, the smaller and more weakly magnetic particles will be effectively caught. The economical version (8kGs) handles large pieces of metal perfectly. High induction is necessary when contaminants are microscopic or weakly magnetic.
We can produce a rod of non-standard length with any mounting termination. 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.

Advantages as well as disadvantages of rare earth magnets.

Advantages

Besides their high retention, neodymium magnets are valued for these benefits:
  • They have constant strength, and over nearly ten years their performance decreases symbolically – ~1% (according to theory),
  • Neodymium magnets are characterized by remarkably resistant to demagnetization caused by magnetic disturbances,
  • The use of an refined layer of noble metals (nickel, gold, silver) causes the element to present itself better,
  • Neodymium magnets generate maximum magnetic induction on a their surface, which increases force concentration,
  • Thanks to resistance to high temperature, they are able to function (depending on the form) even at temperatures up to 230°C and higher...
  • Thanks to the possibility of precise shaping and adaptation to custom requirements, neodymium magnets can be created in a broad palette of forms and dimensions, which makes them more universal,
  • Huge importance in future technologies – they find application in HDD drives, motor assemblies, medical devices, as well as other advanced devices.
  • Thanks to efficiency per cm³, small magnets offer high operating force, with minimal size,

Disadvantages

Drawbacks and weaknesses of neodymium magnets: application proposals
  • 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.
  • Neodymium magnets lose 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 durability even at temperatures up to 230°C
  • When exposed to humidity, magnets usually rust. To use them in conditions outside, it is recommended to use protective magnets, such as those in rubber or plastics, which prevent oxidation and corrosion.
  • Limited possibility of creating threads in the magnet and complicated shapes - recommended is casing - magnetic holder.
  • Potential hazard to health – tiny shards of magnets pose a threat, in case of ingestion, 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 in case of swallowing.
  • With mass production the cost of neodymium magnets is economically unviable,

Holding force characteristics

Maximum magnetic pulling forcewhat contributes to it?

Breakaway force is the result of a measurement for the most favorable conditions, assuming:
  • with the use of a yoke made of special test steel, ensuring maximum field concentration
  • possessing a massiveness of at least 10 mm to ensure full flux closure
  • with an ideally smooth contact surface
  • without the slightest clearance between the magnet and steel
  • during pulling in a direction perpendicular to the mounting surface
  • at room temperature

What influences lifting capacity in practice

It is worth knowing that the magnet holding may be lower depending on elements below, starting with the most relevant:
  • Distance – existence of foreign body (paint, tape, air) acts as an insulator, which reduces power steeply (even by 50% at 0.5 mm).
  • Pull-off angle – remember that the magnet has greatest strength perpendicularly. Under shear forces, the capacity drops drastically, often to levels of 20-30% of the nominal value.
  • Substrate thickness – for full efficiency, the steel must be adequately massive. Paper-thin metal restricts the lifting capacity (the magnet "punches through" it).
  • Material composition – different alloys attracts identically. Alloy additives weaken the interaction with the magnet.
  • Surface structure – the more even the surface, the larger the contact zone and stronger the hold. Roughness creates an air distance.
  • Thermal environment – heating the magnet causes a temporary drop of induction. Check the thermal limit for a given model.

Lifting capacity testing was performed on a smooth plate of optimal thickness, under a perpendicular pulling force, however under attempts to slide the magnet the holding force is lower. Additionally, even a small distance between the magnet and the plate decreases the load capacity.

Safe handling of neodymium magnets
Shattering risk

Watch out for shards. Magnets can explode upon uncontrolled impact, ejecting sharp fragments into the air. We recommend safety glasses.

Warning for heart patients

Individuals with a pacemaker must maintain an large gap from magnets. The magnetic field can stop the functioning of the implant.

Data carriers

Intense magnetic fields can corrupt files on credit cards, HDDs, and storage devices. Stay away of min. 10 cm.

Demagnetization risk

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

Immense force

Handle magnets consciously. Their immense force can surprise even experienced users. Plan your moves and respect their force.

Precision electronics

GPS units and smartphones are highly sensitive to magnetic fields. Close proximity with a strong magnet can decalibrate the sensors in your phone.

Bodily injuries

Large magnets can crush fingers in a fraction of a second. Under no circumstances put your hand between two strong magnets.

No play value

These products are not suitable for play. Accidental ingestion of multiple magnets may result in them attracting across intestines, which poses a direct threat to life and necessitates urgent medical intervention.

Metal Allergy

Nickel alert: The Ni-Cu-Ni coating consists of nickel. If skin irritation appears, immediately stop working with magnets and use protective gear.

Combustion hazard

Fire warning: Rare earth powder is explosive. Avoid machining magnets in home conditions as this risks ignition.

Safety First! More info about risks in the article: Safety of working with magnets.
Dhit sp. z o.o.

e-mail: bok@dhit.pl

tel: +48 888 99 98 98