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neodymium magnets

We provide blue color magnets Nd2Fe14B - our store's offer. All magnesy on our website are in stock for immediate purchase (see the list). See the magnet pricing for more details see the magnet price list

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MW 9x3 / N38 - cylindrical magnet

cylindrical magnet

Catalog no 010108

GTIN: 5906301811077

5

Diameter Ø [±0,1 mm]

9 mm

Height [±0,1 mm]

3 mm

Weight

1.43 g

Magnetization Direction

↑ axial

Load capacity

1.49 kg / 14.61 N

Magnetic Induction

343.55 mT

Coating

[NiCuNi] nickel

1.132 with VAT / pcs + price for transport

0.920 ZŁ net + 23% VAT / pcs

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MW 9x3 / N38 - cylindrical magnet
Specification/characteristics MW 9x3 / N38 - cylindrical magnet
properties
values
Cat. no.
010108
GTIN
5906301811077
Production/Distribution
Dhit sp. z o.o.
Country of origin
Poland / China / Germany
Customs code
85059029
Diameter Ø
9 mm [±0,1 mm]
Height
3 mm [±0,1 mm]
Weight
1.43 g [±0,1 mm]
Magnetization Direction
↑ axial
Load capacity ~ ?
1.49 kg / 14.61 N
Magnetic Induction ~ ?
343.55 mT
Coating
[NiCuNi] nickel
Manufacturing Tolerance
± 0.1 mm

Magnetic properties of material N38

properties
values
units
remenance Br [Min. - Max.] ?
12.2-12.6
kGs
remenance Br [Min. - Max.] ?
1220-1260
T
coercivity bHc ?
10.8-11.5
kOe
coercivity bHc ?
860-915
kA/m
actual internal force iHc
≥ 12
kOe
actual internal force iHc
≥ 955
kA/m
energy density [Min. - Max.] ?
36-38
BH max MGOe
energy density [Min. - Max.] ?
287-303
BH max KJ/m
max. temperature ?
≤ 80
°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

Shopping tips

The offered product is an exceptionally strong cylinder magnet, composed of modern NdFeB material, which, with dimensions of Ø9x3 mm, guarantees maximum efficiency. The MW 9x3 / N38 model boasts a tolerance of ±0.1mm and professional build quality, making it a perfect solution for professional engineers and designers. As a magnetic rod with impressive force (approx. 1.49 kg), this product is in stock from our warehouse in Poland, ensuring lightning-fast order fulfillment. Moreover, its Ni-Cu-Ni coating secures it against corrosion in standard operating conditions, ensuring an aesthetic appearance and durability for years.
It successfully proves itself in DIY projects, advanced automation, and broadly understood industry, serving as a fastening or actuating element. Thanks to the pull force of 14.61 N with a weight of only 1.43 g, this rod is indispensable in miniature devices and wherever every gram matters.
Since our magnets have a tolerance of ±0.1mm, the recommended way is to glue them into holes with a slightly larger diameter (e.g., 9.1 mm) using two-component epoxy glues. To ensure long-term durability in industry, anaerobic resins are used, which do not react with the nickel coating and fill the gap, guaranteeing high repeatability of the connection.
Magnets NdFeB grade N38 are strong enough for 90% of applications in modeling and machine building, where excessive miniaturization with maximum force is not required. If you need even stronger magnets in the same volume (Ø9x3), contact us regarding higher grades (e.g., N50, N52), however, N38 is the standard available off-the-shelf in our warehouse.
The presented product is a neodymium magnet with precisely defined parameters: diameter 9 mm and height 3 mm. The key parameter here is the lifting capacity amounting to approximately 1.49 kg (force ~14.61 N), which, with such compact dimensions, proves the high grade of the NdFeB material. The product has a [NiCuNi] coating, which secures it against external factors, giving it an aesthetic, silvery shine.
Standardly, the magnetic axis runs through the center of the cylinder, causing the greatest attraction force to occur on the bases with a diameter of 9 mm. Such an arrangement is most desirable when connecting magnets in stacks (e.g., in filters) or when mounting in sockets at the bottom of a hole. On request, we can also produce versions magnetized diametrically if your project requires it.

Pros as well as cons of rare earth magnets.

Apart from their consistent magnetism, neodymium magnets have these key benefits:

  • They retain attractive force for almost 10 years – the drop is just ~1% (according to analyses),
  • They are noted for resistance to demagnetization induced by external field influence,
  • In other words, due to the metallic surface of gold, the element becomes visually attractive,
  • Magnetic induction on the working layer of the magnet is strong,
  • Thanks to resistance to high temperature, they are able to function (depending on the shape) even at temperatures up to 230°C and higher...
  • Thanks to modularity in forming and the ability to modify to unusual requirements,
  • Wide application in electronics industry – they are used in computer drives, electromotive mechanisms, precision medical tools, also complex engineering applications.
  • Compactness – despite small sizes they provide effective action, making them ideal for precision applications

Problematic aspects of neodymium magnets: tips and applications.

  • They are fragile upon too strong impacts. To avoid cracks, it is worth protecting magnets in a protective case. Such protection not only shields the magnet but also improves its resistance to damage
  • Neodymium magnets lose their power 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
  • They rust in a humid environment. For use outdoors we suggest using waterproof magnets e.g. in rubber, plastic
  • Limited possibility of producing nuts in the magnet and complex forms - recommended is cover - mounting mechanism.
  • Potential hazard resulting from small fragments of magnets can be dangerous, when accidentally swallowed, which gains importance in the aspect of protecting the youngest. Furthermore, small components of these products can disrupt the diagnostic process medical in case of swallowing.
  • With large orders the cost of neodymium magnets is economically unviable,

Optimal lifting capacity of a neodymium magnetwhat affects it?

Information about lifting capacity was defined for the most favorable conditions, including:

  • using a base made of mild steel, functioning as a ideal flux conductor
  • whose thickness reaches at least 10 mm
  • with a plane perfectly flat
  • with total lack of distance (without coatings)
  • for force applied at a right angle (in the magnet axis)
  • at standard ambient temperature

What influences lifting capacity in practice

In real-world applications, the actual lifting capacity is determined by many variables, listed from the most important:

  • Distance – existence of any layer (paint, tape, gap) interrupts the magnetic circuit, which lowers capacity steeply (even by 50% at 0.5 mm).
  • Force direction – note that the magnet has greatest strength perpendicularly. Under shear forces, the capacity drops drastically, often to levels of 20-30% of the maximum value.
  • Wall thickness – the thinner the sheet, the weaker the hold. Magnetic flux passes through the material instead of generating force.
  • Material type – ideal substrate is pure iron steel. Hardened steels may have worse magnetic properties.
  • Surface condition – smooth surfaces ensure maximum contact, which improves field saturation. Rough surfaces weaken the grip.
  • Thermal environment – heating the magnet causes a temporary drop of induction. It is worth remembering the maximum operating temperature for a given model.

* Holding force was measured on the plate surface of 20 mm thickness, when the force acted perpendicularly, however under attempts to slide the magnet the lifting capacity is smaller. Additionally, even a slight gap {between} the magnet and the plate decreases the lifting capacity.

Warnings

Compass and GPS

Navigation devices and mobile phones are highly susceptible to magnetic fields. Direct contact with a strong magnet can decalibrate the internal compass in your phone.

Electronic devices

Data protection: Neodymium magnets can ruin data carriers and sensitive devices (heart implants, hearing aids, timepieces).

Sensitization to coating

Allergy Notice: The nickel-copper-nickel coating contains nickel. If redness occurs, immediately stop handling magnets and use protective gear.

Do not drill into magnets

Powder created during cutting of magnets is combustible. Do not drill into magnets without proper cooling and knowledge.

Danger to the youngest

Always keep magnets out of reach of children. Choking hazard is high, and the effects of magnets clamping inside the body are tragic.

Implant safety

For implant holders: Strong magnetic fields disrupt electronics. Maintain at least 30 cm distance or request help to work with the magnets.

Handling rules

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

Magnet fragility

Despite metallic appearance, neodymium is brittle and not impact-resistant. Do not hit, as the magnet may shatter into sharp, dangerous pieces.

Crushing force

Mind your fingers. Two large magnets will snap together instantly with a force of several hundred kilograms, destroying anything in their path. Be careful!

Power loss in heat

Keep cool. NdFeB magnets are sensitive to heat. If you need resistance above 80°C, look for HT versions (H, SH, UH).

Security!

More info about risks in the article: Magnet Safety Guide.

Dhit sp. z o.o.

e-mail: bok@dhit.pl

tel: +48 888 99 98 98