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neodymium magnets

We provide blue color magnetic Nd2Fe14B - our proposal. Practically all "magnets" in our store are available for immediate purchase (check the list). See the magnet pricing for more details check 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

bulk discounts:

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Force as well as form of a neodymium magnet can be checked on our power calculator.

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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

This product is a very strong cylindrical magnet, manufactured from durable NdFeB material, which, with dimensions of Ø9x3 mm, guarantees the highest energy density. The MW 9x3 / N38 model features a tolerance of ±0.1mm and professional build quality, making it an ideal solution for the most demanding engineers and designers. As a magnetic rod with impressive force (approx. 1.49 kg), this product is available off-the-shelf from our warehouse in Poland, ensuring lightning-fast order fulfillment. Additionally, its triple-layer Ni-Cu-Ni coating effectively protects it against corrosion in standard operating conditions, ensuring an aesthetic appearance and durability for years.
This model is created for building generators, advanced sensors, and efficient filters, where field concentration on a small surface counts. Thanks to the high power of 14.61 N with a weight of only 1.43 g, this rod is indispensable in electronics and wherever every gram matters.
Since our magnets have a very precise dimensions, the recommended way is to glue them into holes with a slightly larger diameter (e.g., 9.1 mm) using epoxy glues. To ensure long-term durability in industry, anaerobic resins are used, which are safe for nickel and fill the gap, guaranteeing durability 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.
This rod magnet is magnetized axially (along the height of 3 mm), which means that the N and S poles are located on the flat, circular surfaces. 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 through the diameter if your project requires it.

Advantages and disadvantages of NdFeB magnets.

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

  • They virtually do not lose power, because even after 10 years the decline in efficiency is only ~1% (based on calculations),
  • Magnets very well defend themselves against loss of magnetization caused by ambient magnetic noise,
  • In other words, due to the shiny finish of gold, the element gains a professional look,
  • The surface of neodymium magnets generates a intense magnetic field – this is a distinguishing feature,
  • Through (appropriate) combination of ingredients, they can achieve high thermal strength, enabling action at temperatures approaching 230°C and above...
  • Possibility of precise machining and optimizing to individual requirements,
  • Universal use in advanced technology sectors – they are utilized in HDD drives, drive modules, medical equipment, also technologically advanced constructions.
  • Relatively small size with high pulling force – neodymium magnets offer high power in tiny dimensions, which enables their usage in small systems

Disadvantages of NdFeB magnets:

  • At strong impacts they can break, therefore we advise placing them in special holders. A metal housing provides additional protection against damage, as well as increases the magnet's durability.
  • Neodymium magnets demagnetize when exposed to high temperatures. After reaching 80°C, many of them experience permanent weakening of power (a factor is the shape and dimensions of the magnet). We offer magnets specially adapted to work at temperatures up to 230°C marked [AH], which are extremely resistant to heat
  • Due to the susceptibility of magnets to corrosion in a humid environment, we advise using waterproof magnets made of rubber, plastic or other material immune to moisture, when using outdoors
  • Limited possibility of making threads in the magnet and complicated forms - recommended is a housing - magnet mounting.
  • Possible danger to health – tiny shards of magnets are risky, if swallowed, which gains importance in the context of child safety. Additionally, tiny parts of these devices are able to be problematic in diagnostics medical after entering the body.
  • With large orders the cost of neodymium magnets is a challenge,

Maximum lifting capacity of the magnetwhat affects it?

The declared magnet strength concerns the maximum value, obtained under optimal environment, meaning:

  • using a plate made of mild steel, acting as a circuit closing element
  • possessing a thickness of min. 10 mm to ensure full flux closure
  • with an ideally smooth contact surface
  • under conditions of ideal adhesion (surface-to-surface)
  • under axial application of breakaway force (90-degree angle)
  • in neutral thermal conditions

Key elements affecting lifting force

In real-world applications, the real power is determined by several key aspects, listed from crucial:

  • Clearance – existence of foreign body (rust, tape, gap) interrupts the magnetic circuit, which lowers capacity rapidly (even by 50% at 0.5 mm).
  • Direction of force – highest force is reached only during perpendicular pulling. The force required to slide of the magnet along the plate is usually many times smaller (approx. 1/5 of the lifting capacity).
  • Wall thickness – thin material does not allow full use of the magnet. Magnetic flux passes through the material instead of generating force.
  • Material type – ideal substrate is pure iron steel. Cast iron may attract less.
  • Surface quality – the smoother and more polished the plate, the larger the contact zone and stronger the hold. Roughness acts like micro-gaps.
  • Thermal factor – high temperature weakens magnetic field. Exceeding the limit temperature can permanently damage the magnet.

* Lifting capacity was assessed by applying a smooth steel plate of suitable thickness (min. 20 mm), under perpendicular pulling force, whereas under shearing force the holding force is lower. Moreover, even a slight gap {between} the magnet and the plate lowers the lifting capacity.

Warnings

Medical implants

Life threat: Neodymium magnets can deactivate pacemakers and defibrillators. Stay away if you have electronic implants.

Compass and GPS

An intense magnetic field disrupts the operation of compasses in phones and navigation systems. Do not bring magnets close to a device to avoid breaking the sensors.

Combustion hazard

Powder generated during machining of magnets is self-igniting. Do not drill into magnets unless you are an expert.

Do not give to children

Product intended for adults. Tiny parts can be swallowed, leading to intestinal necrosis. Keep away from children and animals.

Handling rules

Use magnets with awareness. Their immense force can shock even experienced users. Be vigilant and respect their power.

Nickel coating and allergies

It is widely known that nickel (the usual finish) is a potent allergen. For allergy sufferers, avoid touching magnets with bare hands or opt for encased magnets.

Beware of splinters

Neodymium magnets are ceramic materials, which means they are very brittle. Clashing of two magnets will cause them cracking into small pieces.

Crushing force

Watch your fingers. Two powerful magnets will join immediately with a force of several hundred kilograms, destroying everything in their path. Exercise extreme caution!

Heat warning

Do not overheat. Neodymium magnets are susceptible to heat. If you need resistance above 80°C, look for special high-temperature series (H, SH, UH).

Electronic devices

Device Safety: Neodymium magnets can ruin data carriers and delicate electronics (heart implants, medical aids, timepieces).

Safety First!

Need more info? Check our post: Why are neodymium magnets dangerous?

Dhit sp. z o.o.

e-mail: bok@dhit.pl

tel: +48 888 99 98 98