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neodymium magnets

We offer yellow color magnets Nd2Fe14B - our store's offer. All "magnets" in our store are in stock for immediate delivery (see the list). Check out the magnet price list 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

9 mm [±0,1 mm]

Height

3 mm [±0,1 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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Lifting power as well as structure of a neodymium magnet can be calculated with our modular 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
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 presented product is a very strong cylinder magnet, composed of modern NdFeB material, which, with dimensions of Ø9x3 mm, guarantees optimal power. This specific item features an accuracy of ±0.1mm and industrial build quality, making it a perfect solution for the most demanding engineers and designers. As a cylindrical magnet with significant force (approx. 1.49 kg), this product is in stock from our warehouse in Poland, ensuring quick order fulfillment. Furthermore, its triple-layer Ni-Cu-Ni coating shields it against corrosion in typical operating conditions, guaranteeing an aesthetic appearance and durability for years.
This model is perfect for building electric motors, advanced sensors, and efficient magnetic separators, 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 cylindrical magnet is indispensable in miniature devices and wherever low weight is crucial.
Due to the delicate structure of the ceramic sinter, we absolutely advise against force-fitting (so-called press-fit), as this risks immediate cracking of this professional component. To ensure long-term durability in industry, specialized industrial adhesives are used, which do not react with the nickel coating and fill the gap, guaranteeing durability of the connection.
Grade N38 is the most frequently chosen standard for professional neodymium magnets, offering an optimal price-to-power ratio and high resistance to demagnetization. If you need the strongest magnets in the same volume (Ø9x3), contact us regarding higher grades (e.g., N50, N52), however, N38 is the standard in continuous sale in our warehouse.
This model is characterized by dimensions Ø9x3 mm, which, at a weight of 1.43 g, makes it an element with impressive magnetic energy density. The value of 14.61 N means that the magnet is capable of holding a weight many times exceeding its own mass of 1.43 g. The product has a [NiCuNi] coating, which protects the surface against oxidation, 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. Thanks to this, the magnet can be easily glued into a hole and achieve a strong field on the front surface. On request, we can also produce versions magnetized through the diameter if your project requires it.

Advantages and disadvantages of neodymium magnets.

Besides their magnetic performance, neodymium magnets are valued for these benefits:

  • They virtually do not lose strength, because even after ten years the decline in efficiency is only ~1% (according to literature),
  • They show high resistance to demagnetization induced by presence of other magnetic fields,
  • The use of an refined coating of noble metals (nickel, gold, silver) causes the element to have aesthetics,
  • Magnetic induction on the working part of the magnet is extremely intense,
  • Due to their durability and thermal resistance, neodymium magnets are capable of operate (depending on the form) even at high temperatures reaching 230°C or more...
  • Thanks to modularity in shaping and the ability to customize to unusual requirements,
  • Fundamental importance in high-tech industry – they are used in hard drives, drive modules, medical equipment, as well as industrial machines.
  • Thanks to their power density, small magnets offer high operating force, with minimal size,

Disadvantages of NdFeB magnets:

  • At strong impacts they can break, 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 power under the influence of heating. As soon as 80°C is exceeded, many of them start losing their power. Therefore, we recommend our special magnets marked [AH], which maintain stability even at temperatures up to 230°C
  • Magnets exposed to a humid environment can corrode. Therefore during using outdoors, we recommend using waterproof magnets made of rubber, plastic or other material resistant to moisture
  • Limited ability of producing threads in the magnet and complicated shapes - preferred is casing - magnet mounting.
  • Health risk resulting from small fragments of magnets pose a threat, if swallowed, which is particularly important in the context of child health protection. Furthermore, small components of these magnets are able to disrupt the diagnostic process medical in case of swallowing.
  • Higher cost of purchase is one of the disadvantages compared to ceramic magnets, especially in budget applications

Breakaway strength of the magnet in ideal conditionswhat contributes to it?

Magnet power was defined for optimal configuration, assuming:

  • on a block made of mild steel, perfectly concentrating the magnetic flux
  • possessing a massiveness of minimum 10 mm to avoid saturation
  • characterized by smoothness
  • with direct contact (no paint)
  • under axial force direction (90-degree angle)
  • at temperature room level

Magnet lifting force in use – key factors

Holding efficiency is affected by specific conditions, such as (from most important):

  • Distance – existence of foreign body (rust, dirt, air) acts as an insulator, which reduces capacity rapidly (even by 50% at 0.5 mm).
  • Force direction – declared lifting capacity refers to detachment vertically. When attempting to slide, the magnet holds much less (typically approx. 20-30% of maximum force).
  • Element thickness – to utilize 100% power, the steel must be adequately massive. Thin sheet restricts the attraction force (the magnet "punches through" it).
  • Material composition – different alloys attracts identically. High carbon content worsen the attraction effect.
  • Plate texture – ground elements guarantee perfect abutment, which improves force. Rough surfaces weaken the grip.
  • Thermal factor – hot environment reduces pulling force. Exceeding the limit temperature can permanently demagnetize the magnet.

* Holding force was measured on a smooth steel plate of 20 mm thickness, when the force acted perpendicularly, in contrast under attempts to slide the magnet the holding force is lower. Moreover, even a small distance {between} the magnet’s surface and the plate lowers the holding force.

Safe handling of neodymium magnets

Phone sensors

GPS units and smartphones are extremely sensitive to magnetic fields. Direct contact with a strong magnet can permanently damage the sensors in your phone.

Warning for heart patients

Warning for patients: Powerful magnets disrupt electronics. Maintain minimum 30 cm distance or request help to handle the magnets.

Shattering risk

Watch out for shards. Magnets can explode upon violent connection, ejecting shards into the air. Wear goggles.

Nickel allergy

A percentage of the population have a hypersensitivity to Ni, which is the typical protective layer for NdFeB magnets. Frequent touching may cause skin redness. We strongly advise wear safety gloves.

Bodily injuries

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

Threat to electronics

Intense magnetic fields can destroy records on credit cards, hard drives, and storage devices. Keep a distance of at least 10 cm.

Power loss in heat

Keep cool. Neodymium magnets are susceptible to heat. If you require operation above 80°C, ask us about HT versions (H, SH, UH).

Danger to the youngest

Adult use only. Small elements pose a choking risk, causing intestinal necrosis. Keep away from children and animals.

Do not underestimate power

Handle magnets with awareness. Their immense force can shock even experienced users. Stay alert and respect their force.

Fire risk

Combustion risk: Rare earth powder is highly flammable. Do not process magnets in home conditions as this risks ignition.

Warning!

Need more info? Read our article: Why are neodymium magnets dangerous?

Dhit sp. z o.o.

e-mail: bok@dhit.pl

tel: +48 888 99 98 98