e-mail: bok@dhit.pl

neodymium magnets

We provide red color magnetic Nd2Fe14B - our store's offer. Practically all magnesy neodymowe on our website are in stock for immediate delivery (check the list). See the magnet pricing for more details check the magnet price list

Magnets for searching F400 GOLD

Where to buy strong neodymium magnet? Holders with magnets in solid and airtight enclosure are perfect for use in difficult weather conditions, including in the rain and snow read

magnetic holders

Magnetic holders can be applied to enhance manufacturing, exploring underwater areas, or locating meteorites made of metal more information...

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SM 18x200 [2xM5] / N42 - magnetic separator

magnetic separator

Catalog no 130273

GTIN: 5906301812753

Diameter Ø

18 mm [±1 mm]

Height

200 mm [±1 mm]

Weight

0.01 g

Magnetic Flux

~ 5 400 Gauss [±5%]

442.80 with VAT / pcs + price for transport

360.00 ZŁ net + 23% VAT / pcs

bulk discounts:

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Contact us by phone +48 22 499 98 98 or let us know via form through our site.
Weight as well as form of neodymium magnets can be verified on our magnetic calculator.

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SM 18x200 [2xM5] / N42 - magnetic separator

Specification / characteristics SM 18x200 [2xM5] / N42 - magnetic separator

properties
properties values
Cat. no. 130273
GTIN 5906301812753
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 200 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 - 9 poles
Casing Tube Thickness 1 mm
Manufacturing Tolerance ±1 mm

Magnetic properties of material N42

Specification / characteristics SM 18x200 [2xM5] / N42 - magnetic separator
properties values units
remenance Br [Min. - Max.] ? 12.9-13.2 kGs
remenance Br [Min. - Max.] ? 1290-1320 T
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 106 °C-1
Thermal expansion perpendicular (⊥) to orientation (M) -(1-3) x 10-6 °C-1
Young's modulus 1.7 x 104 kg/mm²

Other 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 construction relies on a sealed, welded stainless steel housing, polished smooth. 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.
Due to the high power of the magnet, direct removal of filings can be troublesome and time-consuming. 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 can produce a rod of non-standard length with any mounting termination. The rod end is strictly adapted to the fastening system in your device. We ensure fast realization of special orders and technical advice.

Strengths as well as weaknesses of NdFeB magnets.

Besides their stability, neodymium magnets are valued for these benefits:

  • They have constant strength, and over around 10 years their performance decreases symbolically – ~1% (according to theory),
  • Neodymium magnets prove to be remarkably resistant to demagnetization caused by external interference,
  • A magnet with a shiny nickel surface is more attractive,
  • They are known for high magnetic induction at the operating surface, which affects their effectiveness,
  • Neodymium magnets are characterized by very high magnetic induction on the magnet surface and can function (depending on the form) even at a temperature of 230°C or more...
  • Possibility of accurate forming as well as modifying to atypical conditions,
  • Significant place in future technologies – they are commonly used in mass storage devices, drive modules, advanced medical instruments, as well as other advanced devices.
  • Compactness – despite small sizes they offer powerful magnetic field, making them ideal for precision applications

Problematic aspects of neodymium magnets: weaknesses and usage proposals

  • To avoid cracks upon strong impacts, we suggest using special steel holders. Such a solution secures the magnet and simultaneously improves its durability.
  • When exposed to high temperature, neodymium magnets experience a drop in power. Often, when the temperature exceeds 80°C, their power decreases (depending on the size, as well as shape of the magnet). For those who need magnets for extreme conditions, we offer [AH] versions withstanding up to 230°C
  • 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 protecting against moisture
  • Due to limitations in creating threads and complicated forms in magnets, we propose using cover - magnetic holder.
  • Health risk related to microscopic parts of magnets pose a threat, when accidentally swallowed, which becomes key in the aspect of protecting the youngest. It is also worth noting that small elements of these products are able to be problematic in diagnostics medical in case of swallowing.
  • High unit price – neodymium magnets are more expensive than other types of magnets (e.g. ferrite), which can limit application in large quantities

Best holding force of the magnet in ideal parameterswhat it depends on?

The declared magnet strength concerns the limit force, obtained under ideal test conditions, namely:

  • using a base made of low-carbon steel, acting as a ideal flux conductor
  • with a cross-section no less than 10 mm
  • with a plane perfectly flat
  • without any air gap between the magnet and steel
  • during detachment in a direction vertical to the plane
  • in neutral thermal conditions

Determinants of practical lifting force of a magnet

Holding efficiency is affected by working environment parameters, mainly (from most important):

  • Distance – existence of any layer (paint, tape, gap) interrupts the magnetic circuit, which lowers power steeply (even by 50% at 0.5 mm).
  • Force direction – declared lifting capacity refers to detachment vertically. When applying parallel force, the magnet holds significantly lower power (typically approx. 20-30% of maximum force).
  • Plate thickness – insufficiently thick steel causes magnetic saturation, causing part of the flux to be lost into the air.
  • Material composition – not every steel reacts the same. High carbon content worsen the interaction with the magnet.
  • Surface structure – the smoother and more polished the surface, the larger the contact zone and higher the lifting capacity. Roughness acts like micro-gaps.
  • Temperature – heating the magnet causes a temporary drop of force. It is worth remembering the maximum operating temperature for a given model.

* Holding force was tested on the plate surface of 20 mm thickness, when the force acted perpendicularly, however under attempts to slide the magnet the holding force is lower. Additionally, even a minimal clearance {between} the magnet and the plate lowers the lifting capacity.

Safety rules for work with NdFeB magnets

Warning for heart patients

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

Do not give to children

Always keep magnets away from children. Choking hazard is significant, and the consequences of magnets clamping inside the body are life-threatening.

Crushing risk

Mind your fingers. Two large magnets will join immediately with a force of massive weight, crushing everything in their path. Exercise extreme caution!

Sensitization to coating

Nickel alert: The nickel-copper-nickel coating contains nickel. If an allergic reaction appears, immediately stop working with magnets and use protective gear.

Flammability

Combustion risk: Rare earth powder is highly flammable. Avoid machining magnets without safety gear as this may cause fire.

Conscious usage

Before use, read the rules. Sudden snapping can break the magnet or hurt your hand. Think ahead.

Magnetic media

Avoid bringing magnets near a purse, laptop, or TV. The magnetic field can irreversibly ruin these devices and wipe information from cards.

Do not overheat magnets

Standard neodymium magnets (N-type) undergo demagnetization when the temperature surpasses 80°C. The loss of strength is permanent.

Keep away from electronics

GPS units and mobile phones are highly susceptible to magnetic fields. Direct contact with a powerful NdFeB magnet can permanently damage the internal compass in your phone.

Eye protection

Despite the nickel coating, neodymium is delicate and cannot withstand shocks. Avoid impacts, as the magnet may shatter into sharp, dangerous pieces.

Caution!

Details about hazards in the article: Magnet Safety Guide.

Dhit sp. z o.o.

e-mail: bok@dhit.pl

tel: +48 888 99 98 98