← previous

Product available shipping tomorrow

MW 7x2 / N38 - cylindrical magnet

cylindrical magnet

Catalog no 010099

GTIN: 5906301810988

Diameter Ø [±0,1 mm]

7 mm

Height [±0,1 mm]

2 mm

Weight

0.58 g

Magnetization Direction

↑ axial

Load capacity

0.77 kg / 7.55 N

Magnetic Induction

307.23 mT

Coating

[NiCuNi] nickel

0.381 ZŁ with VAT / pcs + price for transport

0.310 ZŁ net + 23% VAT / pcs

bulk discounts:

Need more?

price from 1 pcs

0.310 ZŁ

0.381 ZŁ

price from 2100 pcs

0.279 ZŁ

0.343 ZŁ

price from 3000 pcs

0.273 ZŁ

0.336 ZŁ

Carbon Footprint – environmental impact GPSR Regulation – product safety

Not sure which magnet to buy?

Pick up the phone and ask +48 22 499 98 98 alternatively drop us a message via our online form the contact form page.
Specifications and appearance of a neodymium magnet can be calculated using our modular calculator.

Order by 14:00 and we’ll ship today!

MW 7x2 / N38 - cylindrical magnet

Specification/characteristics MW 7x2 / N38 - cylindrical magnet

properties

values

Cat. no.

010099

GTIN

5906301810988

Production/Distribution

Dhit sp. z o.o.

Country of origin

Poland / China / Germany

Customs code

85059029

Diameter Ø

7 mm [±0,1 mm]

Height

2 mm [±0,1 mm]

Weight

0.58 g [±0,1 mm]

Magnetization Direction

↑ axial

Load capacity ~ ?

0.77 kg / 7.55 N

Magnetic Induction ~ ?

307.23 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

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

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

Product available wysyłka jutro!

SM 25x325 [2xM8] / N42 - magnetic separator

910.20 ZŁ / pcs

Product available wysyłka jutro!

MP 20x8x5 / N38 - ring magnet

3.44 ZŁ / pcs

Product available wysyłka jutro!

MPL 5x5x1.5 / N38 - lamellar magnet

0.1845 ZŁ / pcs

Product available wysyłka jutro!

MW 80x30 / N38 - cylindrical magnet

415.00 ZŁ / pcs

Neodymium Cylindrical Magnets min. MW 7x2 / N38 are magnets created of neodymium in a cylinder form. They are valued for their very strong magnetic properties, which exceed ordinary iron magnets. Thanks to their power, they are often used in devices that need strong adhesion. The typical temperature resistance of such magnets is 80°C, but for cylindrical magnets, this temperature increases with their height. Additionally, various special coatings, such as nickel, gold, or chrome, are often applied to the surface of neodymium magnets to enhance their durability to corrosion. The cylindrical shape is as well one of the most popular among neodymium magnets. The magnet named MW 7x2 / N38 with a magnetic strength 0.77 kg weighs only 0.58 grams.

Cylindrical neodymium magnets, often referred to as Nd₂Fe₁₄B, represent the strongest known material for magnet production. The technology of their production requires a specialized approach and includes melting special neodymium alloys along with other metals such as iron and boron. After appropriate processing, such as heat and mechanical treatment, the magnets are made available for use in many applications, including electric motors, audio-video equipment, and in the automotive and aerospace industries.
Moreover, even though neodymium is a component of the strongest magnets, they are susceptible to corrosion in humid environments. Therefore, they are coated with a coating of gold-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. They should not be used in acidic, basic, organic environments or where solvents are present, as well as in water or oil. Furthermore, they can distort 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 check the website for the current information as well as offers, and before visiting, we recommend calling.

Although, cylindrical neodymium magnets are practical in various applications, they can also constitute certain dangers. Due to their significant magnetic power, they can attract metallic objects with great force, which can lead to damaging skin or other materials, especially fingers. Do not use neodymium magnets near electronic devices or data storage devices, such as credit cards, as they can destroy these devices in terms of magnetic recording. Furthermore, neodymium magnets are susceptible to corrosion in humid environments, therefore they are coated with a thin e.g., nickel layer. Generally, although they are handy, one should handle them carefully.

Neodymium magnets, with the formula Nd₂Fe₁₄B, are currently the strong magnets on the market. They are produced through a complicated sintering process, which involves fusing specific alloys of neodymium with additional metals and then forming and heat treating. Their powerful 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 humid conditions. Therefore, they are often covered with coatings, such as gold, to protect them from environmental factors and prolong their durability. Temperatures exceeding 130°C can result in a loss of their magnetic properties, although there are specific types of neodymium magnets that can tolerate temperatures up to 230°C.
As for potential dangers, it is important to avoid using neodymium magnets in acidic conditions, basic environments, 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 N50 and N52 is a strong and powerful metallic component in the form of a cylinder, providing high force and universal applicability. Competitive price, 24h delivery, ruggedness and broad range of uses.

Advantages and disadvantages of neodymium magnets NdFeB.

Apart from their strong magnetic energy, neodymium magnets have these key benefits:

They do not lose their power approximately 10 years – the reduction of power is only ~1% (theoretically),
Their ability to resist magnetic interference from external fields is impressive,
In other words, due to the glossy silver coating, the magnet obtains an professional appearance,
They have very high magnetic induction on the surface of the magnet,
These magnets tolerate high temperatures, often exceeding 230°C, when properly designed (in relation to form),
With the option for customized forming and targeted design, these magnets can be produced in various shapes and sizes, greatly improving application potential,
Wide application in modern technologies – they find application in HDDs, electromechanical systems, medical equipment or even technologically developed systems,
Thanks to their concentrated strength, small magnets offer high magnetic performance, while occupying minimal space,

Disadvantages of neodymium magnets:

They are fragile when subjected to a powerful impact. If the magnets are exposed to shocks, it is advisable to use in a protective enclosure. The steel housing, in the form of a holder, protects the magnet from fracture and reinforces its overall robustness,
They lose magnetic force 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,
Magnets exposed to moisture can rust. Therefore, for outdoor applications, we recommend waterproof types made of non-metallic composites,
Limited ability to create complex details in the magnet – the use of a mechanical support is recommended,
Potential hazard from tiny pieces may arise, when consumed by mistake, which is notable in the health of young users. Additionally, small elements from these magnets can disrupt scanning when ingested,
Higher purchase price is an important factor to consider compared to ceramic magnets, especially in budget-sensitive applications

Maximum lifting capacity of the magnet – what it depends on?

The given lifting capacity of the magnet corresponds to the maximum lifting force, assessed in the best circumstances, namely:

with mild steel, used as a magnetic flux conductor
of a thickness of at least 10 mm
with a smooth surface
in conditions of no clearance
under perpendicular detachment force
under standard ambient temperature

Determinants of practical lifting force of a magnet

In practice, the holding capacity of a magnet is conditioned by the following aspects, arranged from the most important to the least relevant:

Air gap between the magnet and the plate, because even a very small distance (e.g. 0.5 mm) causes 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 checked on the plate surface of 20 mm thickness, when a perpendicular force was applied, whereas under parallel forces the load capacity is reduced by as much as 75%. Additionally, even a slight gap {between} the magnet and the plate decreases the lifting capacity.

Handle Neodymium Magnets Carefully

Keep neodymium magnets away from the wallet, computer, and TV.

Magnetic fields generated by neodymium magnets can damage magnetic storage media such as floppy disks, credit cards, magnetic ID cards, cassette tapes, video tapes, or other similar devices. In addition, they can damage televisions, VCRs, computer monitors, and CRT displays. You should especially avoid placing neodymium magnets near electronic devices.

Neodymium magnets are among the strongest magnets on Earth. The surprising force they generate between each other can shock you.

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.

Keep neodymium magnets away from GPS and smartphones.

Neodymium magnets generate strong magnetic fields that interfere with magnetometers and compasses used in navigation, as well as internal compasses of smartphones and GPS devices.

Neodymium magnets are fragile and can easily crack and shatter.

Neodymium magnetic are extremely fragile, and by joining them in an uncontrolled manner, they will break. Neodymium magnets are made of metal and coated with a shiny nickel, but they are not as durable as steel. In the event of a collision between two magnets, there may be a scattering of fragments in different directions. Protecting your eyes is crucial in such a situation.

Neodymium magnets can attract to each other, pinch the skin, and cause significant swellings.

If the joining of neodymium magnets is not controlled, then they may crumble and also crack. You can't move them to each other. At a distance less than 10 cm you should hold them extremely strongly.

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.

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 happens because such devices have a function to deactivate them in a magnetic field.

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.

Magnets are not toys, children should not play with them.

Neodymium magnets are not toys. Be cautious and make sure no child plays with them. Small magnets can pose a serious choking hazard. If multiple magnets are swallowed, they can attract to each other through the intestinal walls, causing severe injuries, and even death.

If you have a nickel allergy, avoid contact with neodymium magnets.

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.

Safety rules!

So you are aware of why neodymium magnets are so dangerous, see the article titled How dangerous are very powerful neodymium magnets?.