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MW 70x40 / N38 - cylindrical magnet

cylindrical magnet

Catalog no 010097

GTIN: 5906301810964

5

Diameter Ø [±0,1 mm]

70 mm

Height [±0,1 mm]

40 mm

Weight

1154.54 g

Magnetization Direction

↑ axial

Load capacity

154.82 kg / 1518.27 N

Magnetic Induction

466.52 mT

Coating

[NiCuNi] nickel

420.00 with VAT / pcs + price for transport

341.46 ZŁ net + 23% VAT / pcs

bulk discounts:

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Lifting power as well as shape of a neodymium magnet can be tested on our magnetic mass calculator.

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MW 70x40 / N38 - cylindrical magnet

Specification/characteristics MW 70x40 / N38 - cylindrical magnet
properties
values
Cat. no.
010097
GTIN
5906301810964
Production/Distribution
Dhit sp. z o.o.
Country of origin
Poland / China / Germany
Customs code
85059029
Diameter Ø
70 mm [±0,1 mm]
Height
40 mm [±0,1 mm]
Weight
1154.54 g [±0,1 mm]
Magnetization Direction
↑ axial
Load capacity ~ ?
154.82 kg / 1518.27 N
Magnetic Induction ~ ?
466.52 mT
Coating
[NiCuNi] nickel
Manufacturing Tolerance
± 0.1 mm

Magnetic properties of material N38

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

Neodymium Cylindrical Magnets i.e. MW 70x40 / N38 are magnets made of neodymium in a cylindrical shape. They are known for their very strong magnetic properties, which exceed ordinary ferrite magnets. Because of their power, they are frequently used in products that require strong adhesion. The typical temperature resistance of such magnets is 80 degrees C, but for cylindrical magnets, this temperature rises with the growth of the magnet. Moreover, various special coatings, such as nickel, gold, or chrome, are often applied to the surface of neodymium magnets to enhance their resistance to corrosion. The cylindrical shape is also one of the most popular among neodymium magnets. The magnet with the designation MW 70x40 / N38 and a magnetic force 154.82 kg weighs only 1154.54 grams.
Cylindrical neodymium magnets, also known as Nd2Fe14B, represent the strongest known material for magnet production. Their production process requires a specialized approach and includes sintering special neodymium alloys along with other metals such as iron and boron. After a series of processes, such as heat and mechanical treatment, the magnets become ready for use in many applications, such as electric motors, audio-video equipment, and in the automotive and aerospace industries.
Moreover, although neodymium is part of the strongest magnets, they are susceptible to corrosion in humid environments. For this reason, they are coated with a coating of nickel to protect them from corrosion. It's worth noting that NdFeB neodymium magnets are about 13% lighter than SmCo magnets and, despite their power, easily break, which requires care during their handling. For this reason, any mechanical processing should be done before they are magnetized.

In terms of safety, there are many recommendations regarding the use of these magnets. It is advisable to avoid their use in acidic, basic, organic environments or where solvents are present, as well as in water or oil. Furthermore, they can damage data on magnetic cards and hard drives, although data deletion using a neodymium magnet is not guaranteed.
Regarding the purchase of cylindrical neodymium magnets, many companies offer such products. One of the recommended suppliers is our company Dhit, located in Ożarów Mazowiecki, the address can be found directly in the contact tab. It's always worth visit the site for the current information and promotions, and before visiting, please call.
Due to their strength, cylindrical neodymium magnets are useful in many applications, they can also constitute certain risk. Due to their significant magnetic power, they can pull metallic objects with great force, which can lead to damaging skin or other materials, especially fingers. One should not use neodymium magnets near equipment or data storage devices, such as credit cards, as they can damage these devices in terms of magnetic recording. Moreover, neodymium magnets are prone to corrosion in humid environments, thus they are coated with a thin e.g., nickel layer. Generally, although they are handy, one should handle them with due caution.
Neodymium magnets, with the formula neodymium-iron-boron, are currently the strongest available magnets on the market. They are produced through a complicated sintering process, which involves melting specific alloys of neodymium with additional metals and then shaping and heat treating. Their amazing magnetic strength comes from the specific production technology and chemical structure.
In terms of properties in different environments, neodymium magnets are sensitive to corrosion, especially in humid conditions. Therefore, they are often coated with thin coatings, such as gold, to preserve them from environmental factors and extend their lifespan. High temperatures exceeding 130°C can result in a reduction of their magnetic properties, although there are particular types of neodymium magnets that can withstand temperatures up to 230°C.
As for potential dangers, it is important to avoid using neodymium magnets in acidic environments, basic conditions, organic or solvent environments, unless they are adequately insulated. Additionally, their use is not recommended in wet conditions, oil, or in an atmosphere containing hydrogen, as they may forfeit their magnetic strength.
A cylindrical neodymium magnet in classes N52 and N50 is a strong and extremely powerful magnetic product designed as a cylinder, that offers high force and versatile application. Good price, 24h delivery, resistance and broad range of uses.

Advantages and disadvantages of neodymium magnets NdFeB.

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

  • Their strength is durable, and after around ten years, it drops only by ~1% (according to research),
  • They remain magnetized despite exposure to magnetic surroundings,
  • Because of the lustrous layer of silver, the component looks high-end,
  • They have exceptional magnetic induction on the surface of the magnet,
  • Thanks to their exceptional temperature resistance, they can operate (depending on the form) even at temperatures up to 230°C or more,
  • Thanks to the flexibility in shaping and the capability to adapt to specific requirements, neodymium magnets can be created in diverse shapes and sizes, which expands their application range,
  • Key role in advanced technical fields – they are used in computer drives, electric drives, medical equipment or even sophisticated instruments,
  • Thanks to their power density, small magnets offer high magnetic performance, with minimal size,

Disadvantages of neodymium magnets:

  • They are prone to breaking when subjected to a strong impact. If the magnets are exposed to mechanical hits, we recommend in a metal holder. The steel housing, in the form of a holder, protects the magnet from breakage while also enhances its overall durability,
  • They lose strength at increased temperatures. Most neodymium magnets experience permanent reduction in strength when heated above 80°C (depending on the shape and height). However, we offer special variants with high temperature resistance that can operate up to 230°C or higher,
  • Due to corrosion risk in humid conditions, it is recommended to use sealed magnets made of protective material for outdoor use,
  • Limited ability to create internal holes in the magnet – the use of a external casing is recommended,
  • Possible threat related to magnet particles may arise, especially if swallowed, which is notable in the protection of children. It should also be noted that tiny components from these products may complicate medical imaging when ingested,
  • High unit cost – neodymium magnets are costlier than other types of magnets (e.g., ferrite), which increases the cost of large-scale applications

Handle Neodymium Magnets Carefully

Neodymium magnets are not recommended for people with pacemakers.

Neodymium magnets generate strong magnetic fields. As a result, they interfere with the operation of a pacemaker. This is because many of these devices are equipped with a function that deactivates the device in a magnetic field.

Avoid contact with neodymium magnets if you have a nickel allergy.

Studies clearly indicate a small percentage of people who suffer from metal allergies such as 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.

Magnets made of neodymium are fragile and can easily crack and shatter.

In the event of a collision between two neodymium magnets, it can result in them getting chipped. They are coated with a shiny nickel plating similar to steel, but they are not as hard. At the moment of connection between the magnets, tiny sharp metal pieces can be propelled in various directions at high speed. Eye protection is recommended.

Dust and powder from neodymium magnets are flammable.

Do not attempt to drill into neodymium magnets. Mechanical processing is also not recommended. If the magnet is crushed into fine powder or dust, it becomes highly flammable.

Neodymium magnets are the most powerful, most remarkable magnets on the planet, and the surprising force between them can shock you at first.

To handle 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.

Under no circumstances should neodymium magnets be brought close to GPS and smartphones.

Neodymium magnets are a source of intense magnetic fields that cause interference with magnetometers and compasses used in navigation, as well as internal compasses of smartphones and GPS devices.

Magnets will attract to each other, so remember not to allow them to pinch together without control or place your fingers in their path.

If joining of neodymium magnets is not under control, then they may crumble and also crack. Remember not to move them to each other or have them firmly in hands at a distance less than 10 cm.

Neodymium magnets can demagnetize at high temperatures.

Although magnets have demonstrated their effectiveness up to 80°C or 175°F, the temperature can vary depending on the type, shape, and intended use of the specific magnet.

 Keep neodymium magnets away from youngest children.

Neodymium magnets are not toys. Do not allow children to play with them. In the case of swallowing multiple magnets simultaneously, they can attract to each other through the intestinal walls. In the worst case scenario, this can lead to death.

Do not place neodymium magnets 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 destroy videos, televisions, CRT computer monitors. Remember not to place neodymium magnets close to these electronic devices.

Safety rules!

In order for you to know how powerful neodymium magnets are and why they are so dangerous, see the article - Dangerous very powerful neodymium magnets.

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tel: +48 888 99 98 98