FAQ
Order Status

tel: +48 888 99 98 98

neodymium magnets

We offer red color magnets Nd2Fe14B - our store's offer. Practically all "magnets" on our website are available for immediate purchase (see the list). Check out the magnet price list for more details see the magnet price list

Magnets for fishing F300 GOLD

Where to buy strong neodymium magnet? Magnetic holders in airtight and durable steel enclosure are perfect for use in difficult, demanding climate conditions, including during rain and snow read...

magnetic holders

Holders with magnets can be applied to facilitate production processes, underwater exploration, or finding meteors from gold see...

Enjoy shipping of your order on the day of purchase before 2:00 PM on business days.

Dhit sp. z o.o. logo
0
0.00 PLN
  1. home
  2. lamellar neodymium magnets
  3. flat magnet mpl 40x20x4x2[7/3.5] / n38
← previous
next →
Product available shipping tomorrow!

MPL 40x20x4x2[7/3.5] / N38 - neodymium magnet

lamellar magnet

catalog number 020159

GTIN: 5906301811657

5.0

length

40 mm [±0,1 mm]

width

20 mm [±0,1 mm]

height

4 mm [±0,1 mm]

magnetizing direction

↑ axial

capacity ~

8.93 kg / 87.57 N

magnetic induction ~

168.28 mT / 1,683 Gs

max. temperature

≤ 80 °C

17.96 PLN gross price (including VAT) / pcs +

14.60 PLN net price + 23% VAT / pcs

bulk discounts:

need more quantity?
price from 1 pcs
14.60 PLN
17.96 PLN
price from 42 pcs
13.72 PLN
16.88 PLN
price from 151 pcs
12.85 PLN
15.81 PLN

Do you have difficulties in choosing?

Call us tel: +48 22 499 98 98 or write via form on our website. You can check the strength as well as the shape of neodymium magnets in our force calculator magnetic mass calculator

Orders placed by 2:00 PM will be shipped on the same business day.

Specification: lamellar magnet 40x20x4x2[7/3.5] / N38 ↑ axial

Characteristics: lamellar magnet 40x20x4x2[7/3.5] / N38 ↑ axial
Properties
Values
catalog number
020159
GTIN
5906301811657
production / distribution
Dhit sp. z o.o.
country of origin
Poland / China / Germany
customs code
85059029
length
40 mm [±0,1 mm]
width
20 mm [±0,1 mm]
height
4 mm [±0,1 mm]
magnetizing direction ?
↑ axial
capacity ~ ?
8.93 kg / 87.57 N
magnetic induction ~ ?
168.28 mT / 1,683 Gs
max. temperature ?
≤ 80 °C
coating type ?
[NiCuNi] nickel
weight
24.00 g
execution tolerance
± 0.1 mm

Magnetic properties of the material N38

material characteristics 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

Physical properties of sintered neodymium magnets Nd2Fe14B
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
Neodymium disc magnets present a range of advantages compared to other magnet shapes, which cause them to be the ideal choice for many applications:
Contact Surface: Due to their flat shape, disc magnets provide a larger contact surface with other elements, which is beneficial in applications requiring a stronger magnetic connection.
Applications in Technology: They are often utilized in various devices, such as sensors, stepper motors, or speakers, where a thin and wide shape is essential for their operation.
Mounting: This form's flat shape facilitates mounting, particularly when you need to adhere the magnet to a surface.
Design Flexibility: The flat shape of the magnets gives designers with greater flexibility in placing them in constructions, which can sometimes be more difficult with magnets of more complex shapes.
Stability: In certain applications, the flat base of a disc magnet may provide better stability, minimizing the risk of sliding or rotating. Nevertheless, one should bear in mind that the optimal shape of a magnet depends on the specific application and requirements. In certain cases, other shapes, like cylindrical or spherical, may be more suitable.

Find suggested articles

magnetic separator with handle 25x100 / N52
Product available shipping tomorrow!

magnetic separator with handle 25x100 / N52

307.50 PLN / pcs
search holder 75x25 [M10x3] GW F200 GOLD DUAL Lina / N42
Product available shipping tomorrow! Bestseller

search holder 75x25 [M10x3] GW F200 GOLD DUAL Lina / N42

300.00 PLN / pcs
badge holder 17.5x5 [C310] / N38
Product available shipping tomorrow!

badge holder 17.5x5 [C310] / N38

1.32 PLN / pcs
magnetic separator with handle 32x150 / N52
Product available shipping tomorrow!

magnetic separator with handle 32x150 / N52

492.00 PLN / pcs

Advantages and disadvantages of neodymium magnets NdFeB.

In addition to immense power, neodymium magnets have the following advantages:

  • They do not lose strength over time. After about 10 years, their power decreases by only ~1% (theoretically),
  • They are highly resistant to demagnetization by external magnetic sources,
  • By applying a shiny coating of nickel, gold, or silver, the element gains an aesthetic appearance,
  • They exhibit very high magnetic induction on the surface of the magnet,
  • Magnetic neodymium magnets are characterized by hugely high magnetic induction on the surface of the magnet and can operate (depending on the form) even at temperatures of 230°C or higher...
  • The ability for precise shaping or customization to specific needs – neodymium magnets can be produced in many variants of shapes and sizes, which enhances their versatility in applications.
  • Significant importance in advanced technologically fields – are utilized in HDD drives, electric drive mechanisms, medical apparatus and other highly developed apparatuses.

Disadvantages of neodymium magnets:

  • They can break as they are fragile when subjected to a strong impact. If the magnets are exposed to impacts, we recommend using magnets in a metal holder. The steel housing in the form of a holder protects the magnet from impacts and simultaneously increases its overall strength,
  • They lose power at high temperatures. Most neodymium magnets experience permanent loss of strength when heated above 80°C (depending on the form and height). However, we also offer special magnets with high temperature resistance, up to 230°C,
  • Magnets exposed to a humid environment can corrode. Therefore, when using them outdoors, we recommend using waterproof magnets made of rubber, plastic, or other moisture-resistant materials,
  • The use of a cover - a magnetic holder is recommended due to the limited production capabilities of creating threads or complex shapes in the magnet
  • Potential hazard to health from tiny fragments of magnets are risky, if swallowed, which is particularly important in the context of children's health. It's also worth noting that miniscule components of these devices have the potential to complicate diagnosis after entering the body.

Caution with Neodymium Magnets

Magnets made of neodymium are extremely fragile, resulting in breaking.

Magnets made of neodymium are fragile and will break 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. 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.

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 magnets ever invented. Their power can surprise 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.

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, or other devices. They can also destroy devices like video players, televisions, CRT computer monitors. Do not forget to keep neodymium magnets away from these electronic devices.

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 can attract to each other due to their immense internal force, causing the skin and other body parts to get pinched and resulting in significant swellings.

Neodymium magnets bounce and also touch each other mutually within a distance of several to around 10 cm from each other.

  Do not give neodymium magnets to children.

Neodymium magnets are not toys. You cannot allow them to become toys for children. In such a situation, surgery is necessary to remove them. In the worst case scenario, it can result in death.

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

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

People with pacemakers are advised to avoid neodymium magnets.

Neodymium magnets generate very strong magnetic fields that can 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.

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.

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

e-mail: bok@dhit.pl

tel: +48 888 99 98 98