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neodymium magnets

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MW 10x10 / N38 - cylindrical magnet

cylindrical magnet

Catalog no 010004

GTIN: 5906301810032

5

Diameter Ø [±0,1 mm]

10 mm

Height [±0,1 mm]

10 mm

Weight

5.89 g

Magnetization Direction

↑ axial

Load capacity

5.53 kg / 54.23 N

Magnetic Induction

553.84 mT

Coating

[NiCuNi] nickel

4.31 with VAT / pcs + price for transport

3.50 ZŁ net + 23% VAT / pcs

2.57 ZŁ net was the lowest price in the last 30 days

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MW 10x10 / N38 - cylindrical magnet

Specification/characteristics MW 10x10 / N38 - cylindrical magnet
properties
values
Cat. no.
010004
GTIN
5906301810032
Production/Distribution
Dhit sp. z o.o.
Country of origin
Poland / China / Germany
Customs code
85059029
Diameter Ø
10 mm [±0,1 mm]
Height
10 mm [±0,1 mm]
Weight
5.89 g [±0,1 mm]
Magnetization Direction
↑ axial
Load capacity ~ ?
5.53 kg / 54.23 N
Magnetic Induction ~ ?
553.84 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 NdFeB

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

Cylindrical magnets from this series are made of the strongest magnetic material in the world. This guarantees huge pull force while maintaining a small size. Model MW 10x10 / N38 has a pull force of approx. 5.53 kg. Their symmetrical shape makes them ideal for mounting in drilled holes, electric motors and filters. The surface is protected by a Ni-Cu-Ni (Nickel-Copper-Nickel) coating.
We recommend installation by gluing into a hole with a slightly larger diameter (e.g. +0.1 mm clearance). Professional industrial adhesives are best, which do not react with the nickel coating. Never hammer the magnets, as neodymium is a brittle material and can easily crack upon impact.
The 'N' number indicates the maximum strength of the material. A higher value means more power for the same size. The universal option is N38, which provides an optimal price-to-power ratio. For projects requiring extreme strength, we recommend grade N52, which is the most powerful option on the market.
We use a protective plating of Ni-Cu-Ni (Nickel-Copper-Nickel), which protects against air humidity. Please note they are not water-resistant. During underwater use, the coating may be damaged, leading to corrosion and loss of power. For such tasks, we suggest enclosing them in a sealed housing or ordering a special version.
These products are the heart of many industrial devices. They are used in generators and wind turbines and in magnetic separators for cleaning bulk products. Additionally, due to their precise dimensions, they are indispensable in Hall effect sensors.
These magnets retain their properties up to 80 degrees Celsius. Exceeding this limit risks permanent loss of power. For work in hot environments (e.g. 120°C, 150°C, 200°C), ask about high-temperature versions (H, SH, UH). It is worth knowing that neodymium magnets do not tolerate thermal shock well.

Advantages as well as disadvantages of neodymium magnets NdFeB.

In addition to their tremendous strength, neodymium magnets offer the following advantages:

  • They have unchanged lifting capacity, and over more than 10 years their attraction force decreases symbolically – ~1% (in testing),
  • Their ability to resist magnetic interference from external fields is impressive,
  • By applying a bright layer of gold, the element gains a clean look,
  • They possess significant magnetic force measurable at the magnet’s surface,
  • With the right combination of magnetic alloys, they reach increased thermal stability, enabling operation at or above 230°C (depending on the design),
  • The ability for accurate shaping and adjustment to individual needs – neodymium magnets can be manufactured in many forms and dimensions, which amplifies their functionality across industries,
  • Important function in cutting-edge sectors – they find application in computer drives, electric drives, medical equipment along with technologically developed systems,
  • Relatively small size with high magnetic force – neodymium magnets offer intense magnetic field in small dimensions, which makes them useful in small systems

Disadvantages of NdFeB magnets:

  • They are fragile when subjected to a powerful impact. If the magnets are exposed to external force, they should be placed in a protective enclosure. The steel housing, in the form of a holder, protects the magnet from breakage and enhances its overall resistance,
  • Magnets lose power when exposed to temperatures exceeding 80°C. In most cases, this leads to irreversible magnetic decay (influenced by the magnet’s structure). To address this, we provide [AH] models with superior thermal resistance, able to operate even at 230°C or more,
  • Magnets exposed to damp air can rust. Therefore, for outdoor applications, we suggest waterproof types made of non-metallic composites,
  • Using a cover – such as a magnetic holder – is advised due to the difficulty in manufacturing fine shapes directly in the magnet,
  • Potential hazard due to small fragments may arise, when consumed by mistake, which is crucial in the health of young users. Furthermore, tiny components from these products may hinder health screening when ingested,
  • Due to expensive raw materials, their cost is above average,

Maximum holding power of the magnet – what it depends on?

The given strength of the magnet means the optimal strength, determined in the best circumstances, specifically:

  • with the use of low-carbon steel plate acting as a magnetic yoke
  • having a thickness of no less than 10 millimeters
  • with a refined outer layer
  • in conditions of no clearance
  • under perpendicular detachment force
  • under standard ambient temperature

Determinants of practical lifting force of a magnet

Practical lifting force is dependent on elements, listed from the most critical to the less significant:

  • Air gap between the magnet and the plate, since even a very small distance (e.g. 0.5 mm) can cause a drop in lifting force of up to 50%.
  • Direction of applied force, because the maximum lifting capacity is achieved under perpendicular application. The force required to slide the magnet along the plate is usually several times lower.
  • Thickness of the plate, as a plate that is too thin causes part of the magnetic flux not to be used and to remain wasted in the air.
  • Material of the plate, because higher carbon content lowers holding force, while higher iron content increases it. The best choice is steel with high magnetic permeability and high saturation induction.
  • Surface of the plate, because the more smooth and polished it is, the better the contact and consequently the greater the magnetic saturation.
  • Operating temperature, since all permanent magnets have a negative temperature coefficient. This means that at high temperatures they are weaker, while at sub-zero temperatures they become slightly stronger.

* Lifting capacity was determined with the use of a smooth steel plate of optimal thickness (min. 20 mm), under perpendicular pulling force, in contrast under shearing force the holding force is lower. Moreover, even a minimal clearance {between} the magnet and the plate decreases the lifting capacity.

Handle with Care: Neodymium Magnets

Neodymium magnets are over 10 times stronger than ferrite magnets (the ones in speakers), and their power can shock you.

To use magnets properly, it is best to familiarize yourself with our information beforehand. This will help you avoid significant harm to your body and the magnets themselves.

Neodymium magnets can demagnetize at high temperatures.

Even though magnets have been found to maintain their efficacy up to temperatures of 80°C or 175°F, it's essential to consider that this threshold may fluctuate depending on the magnet's type, configuration, and intended usage.

The magnet is coated with nickel. Therefore, exercise caution if you have an allergy.

Studies show a small percentage of people have allergies to certain metals, including nickel. An allergic reaction often manifests as skin redness and rash. If you have a nickel allergy, try wearing gloves or avoid direct contact with nickel-plated neodymium magnets.

 Maintain neodymium magnets away from children.

Neodymium magnets are not toys. You cannot allow them to become toys for children. In the case of small magnets, they can be swallowed and cause choking. In such cases, the only solution is to undergo surgery to remove the magnets, and otherwise, it can even lead to death.

Neodymium magnets are not recommended for people with pacemakers.

Neodymium magnets produce strong magnetic fields that can interfere with the operation of a heart pacemaker. Even if the magnetic field does not affect the device, it can damage its components or deactivate the entire device.

Dust and powder from neodymium magnets are highly flammable.

Avoid drilling or mechanical processing of neodymium magnets. Once crushed into fine powder or dust, this material becomes highly flammable.

Under no circumstances should neodymium magnets be placed near a computer HDD, TV, and wallet.

The strong magnetic field generated by neodymium magnets can damage magnetic media such as floppy disks, video tapes, HDDs, credit cards, magnetic ID cards, cassette tapes, etc. devices. They can also damage videos, televisions, CRT computer monitors. Do not forget to keep neodymium magnets away from these electronic devices.

Magnets made of neodymium are especially delicate, which leads to their breakage.

Neodymium magnetic are fragile as well as will crack if allowed to collide with each other, even from a distance of a few centimeters. They are coated with a shiny nickel plating similar to steel, but they are not as hard. At the moment of collision between the magnets, small sharp metal pieces can be propelled in various directions at high speed. Eye protection is recommended.

Neodymium magnets are primarily characterized by their significant internal force. They attract to each other, and any object that comes in their way will be affected.

Magnets attract each other within a distance of several to about 10 cm from each other. Remember not to put fingers between magnets or alternatively in their path when they attract. Magnets, depending on their size, are able even cut off a finger or there can be a severe pressure or a fracture.

Keep neodymium magnets as far away as possible from GPS and smartphones.

Intense magnetic fields generated by neodymium magnets interfere with compasses and magnetometers used in navigation, as well as internal compasses of smartphones and GPS devices.

Be careful!

Please see the article - What danger lies in neodymium magnets? You will learn how to handle them properly.

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e-mail: bok@dhit.pl

tel: +48 888 99 98 98