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MW 16x4 / N38 - cylindrical magnet

cylindrical magnet

Catalog no 010034

GTIN: 5906301810339

Diameter Ø [±0,1 mm]

16 mm

Height [±0,1 mm]

4 mm

Weight

6.03 g

Magnetization Direction

↑ axial

Load capacity

3.54 kg / 34.72 N

Magnetic Induction

277.14 mT

Coating

[NiCuNi] nickel

3.39 ZŁ with VAT / pcs + price for transport

2.76 ZŁ net + 23% VAT / pcs

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MW 16x4 / N38 - cylindrical magnet

Specification/characteristics MW 16x4 / N38 - cylindrical magnet

properties

values

Cat. no.

010034

GTIN

5906301810339

Production/Distribution

Dhit sp. z o.o.

Country of origin

Poland / China / Germany

Customs code

85059029

Diameter Ø

16 mm [±0,1 mm]

Height

4 mm [±0,1 mm]

Weight

6.03 g [±0,1 mm]

Magnetization Direction

↑ axial

Load capacity ~ ?

3.54 kg / 34.72 N

Magnetic Induction ~ ?

277.14 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

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

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

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Cylindrical Neodymium Magnets min. MW 16x4 / N38 are magnets made of neodymium in a cylindrical shape. They are valued for their extremely powerful magnetic properties, which outperform traditional ferrite magnets. Thanks to their strength, they are frequently employed in products that need strong adhesion. The typical temperature resistance of such magnets is 80 degrees C, but for cylindrical magnets, this temperature increases with the growth of the magnet. Additionally, various special coatings, such as nickel, gold, or chrome, are often applied to the surface of neodymium magnets to increase their resistance to corrosion. The cylindrical shape is also very popular among neodymium magnets. The magnet designated MW 16x4 / N38 and a magnetic strength 3.54 kg weighs only 6.03 grams.

Cylindrical neodymium magnets, often referred to as Nd₂Fe₁₄B, represent the strongest known material for magnet production. Their production process is complicated and includes melting special neodymium alloys with other metals such as iron and boron. After appropriate processing, such as heat and mechanical treatment, the magnets become ready for use in varied applications, including electric motors, audio-video equipment, and in the automotive and aerospace industries.
Moreover, although neodymium is a component of the strongest magnets, they are susceptible to corrosion in humid environments. For this reason, they are coated with a thin layer of nickel to increase their durability. 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. Therefore, any mechanical processing should be done before they are magnetized.

In terms of safety, there are several recommendations regarding the use of these magnets. It is advisable to avoid their use in acidic, basic, organic environments or where solvents are present, and also in water or oil. Furthermore, they can damage data on magnetic cards and hard drives, although data deletion using a neodymium magnet is not always certain.

In terms of purchasing of cylindrical neodymium magnets, many companies offer such products. One of the suggested suppliers is our company Dhit, located in Ożarów Mazowiecki, the address is available directly in the contact tab. It is recommended to visit the site for the current information and offers, and before visiting, we recommend calling.

Although, cylindrical neodymium magnets are very useful in many applications, they can also constitute certain dangers. Because of their strong magnetic power, they can pull metallic objects with great force, which can lead to damaging skin and other surfaces, especially fingers. Do not use neodymium magnets near electronic devices or data storage devices, such as credit cards, as they can damage these devices in terms of magnetic recording. Furthermore, 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, they should be handled carefully.

Neodymium magnets, with the formula neodymium-iron-boron, are currently the very strong magnets on the market. They are produced through a advanced sintering process, which involves fusing special alloys of neodymium with other metals and then forming and heat treating. Their unmatched magnetic strength comes from the specific production technology and chemical composition.
In terms of properties in different environments, neodymium magnets are susceptible to corrosion, especially in conditions of high humidity. Therefore, they are often coated with thin coatings, such as silver, to shield them from external factors and prolong their durability. High temperatures exceeding 130°C can cause a reduction of their magnetic strength, although there are specific types of neodymium magnets that can withstand temperatures up to 230°C.
As for dangers, it is important to avoid using neodymium magnets in acidic conditions, basic environments, organic or solvent environments, unless they are properly protected. Additionally, their use is not recommended in wet conditions, oil, or in an environment containing hydrogen, as they may forfeit their magnetic strength.

A cylindrical neodymium magnet of class N52 and N50 is a strong and powerful magnetic product in the form of a cylinder, that provides high force and universal application. Competitive price, 24h delivery, durability and versatility.

Advantages as well as disadvantages of neodymium magnets NdFeB.

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

Their magnetic field is durable, and after around ten years, it drops only by ~1% (according to research),
They remain magnetized despite exposure to strong external fields,
Thanks to the shiny finish and gold coating, they have an aesthetic appearance,
They exhibit elevated levels of magnetic induction near the outer area of the magnet,
Neodymium magnets are known for strong magnetic induction and the ability to work at temperatures up to 230°C or higher (depending on the shape),
With the option for customized forming and personalized design, these magnets can be produced in various shapes and sizes, greatly improving application potential,
Key role in cutting-edge sectors – they are utilized in data storage devices, electric drives, diagnostic apparatus as well as sophisticated instruments,
Relatively small size with high magnetic force – neodymium magnets offer impressive pulling strength in compact dimensions, which makes them ideal in compact constructions

Disadvantages of magnetic elements:

They can break when subjected to a strong impact. If the magnets are exposed to shocks, it is advisable to use in a steel housing. The steel housing, in the form of a holder, protects the magnet from fracture , and at the same time strengthens its overall strength,
High temperatures may significantly reduce the field efficiency of neodymium magnets. Typically, above 80°C, they experience permanent loss in performance (depending on shape). To prevent this, we offer heat-resistant magnets marked [AH], capable of working up to 230°C, which makes them perfect for high-temperature use,
Due to corrosion risk in humid conditions, it is common to use sealed magnets made of plastic for outdoor use,
Limited ability to create threads in the magnet – the use of a housing is recommended,
Safety concern linked to microscopic shards may arise, especially if swallowed, which is notable in the family environments. Furthermore, small elements from these devices have the potential to disrupt scanning after being swallowed,
High unit cost – neodymium magnets are costlier than other types of magnets (e.g., ferrite), which increases the cost of large-scale applications

Highest magnetic holding force – what it depends on?

The given strength of the magnet means the optimal strength, calculated under optimal conditions, namely:

with mild steel, used as a magnetic flux conductor
having a thickness of no less than 10 millimeters
with a refined outer layer
in conditions of no clearance
under perpendicular detachment force
in normal thermal conditions

Lifting capacity in real conditions – factors

Practical lifting force is determined by factors, by priority:

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.

* Holding force was measured on a smooth steel plate of 20 mm thickness, when the force acted perpendicularly, whereas under attempts to slide the magnet the load capacity is reduced by as much as fivefold. Additionally, even a minimal clearance {between} the magnet and the plate decreases the lifting capacity.

Precautions

Neodymium magnetic are known for being fragile, which can cause them to become damaged.

In the event of a collision between two neodymium magnets, it can result in them getting chipped. Despite being made of metal as well as coated with a shiny nickel plating, they are not as hard as steel. In the case of a collision between two magnets, there can be a scattering of small sharp metal fragments in different directions. Protecting your eyes is essential.

Neodymium magnets can become demagnetized at high temperatures.

Whilst Neodymium magnets can lose their magnetic properties at high temperatures, it's important to note that the extent of this effect can vary based on factors such as the magnet's material, shape, and intended application.

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.

Dust and powder from neodymium magnets are flammable.

Avoid drilling or mechanical processing of neodymium magnets. If the magnet is crushed into fine powder or dust, it becomes highly flammable.

Neodymium magnets are not recommended for people with pacemakers.

Neodymium magnets generate very strong magnetic fields that can interfere with the operation of a pacemaker. This happens because such devices have a function to deactivate them in a magnetic field.

Neodymium magnets should not be in the vicinity children.

Remember that neodymium magnets are not toys. Be cautious and make sure no child plays with them. They can be a significant choking hazard. If multiple magnets are swallowed, they can attract to each other through the intestinal walls, causing significant injuries, and even death.

Make sure not to bring neodymium magnets close to the TV, wallet, and computer HDD.

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 devices like video players, televisions, CRT computer monitors. Do not forget to keep neodymium magnets at a safe distance from these electronic devices.

The magnet coating contains nickel, so be cautious 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.

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.

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

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

Magnetic fields interfere with compasses and magnetometers used in navigation for air and sea transport, as well as internal compasses of smartphones and GPS devices.

Be careful!

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