tel: +48 888 99 98 98

neodymium magnets

We offer yellow color magnetic Nd2Fe14B - our offer. All magnesy neodymowe on our website are in stock for immediate purchase (see the list). See the magnet pricing for more details see the magnet price list

Magnet for water searching F200 GOLD

Where to buy very strong magnet? Magnetic holders in airtight, solid steel casing are excellent for use in difficult, demanding climate conditions, including in the rain and snow see...

magnetic holders

Holders with magnets can be used to improve production processes, exploring underwater areas, or locating space rocks from gold more...

We promise to ship your order if the order is placed before 2:00 PM on working days.

Dhit sp. z o.o. logo
Product available shipping tomorrow

MPL 40x18x10 SH / N38 - lamellar magnet

lamellar magnet

Catalog no 020157

GTIN: 5906301811633

5

length [±0,1 mm]

40 mm

Width [±0,1 mm]

18 mm

Height [±0,1 mm]

10 mm

Weight

54 g

Magnetization Direction

↑ axial

Magnetic Induction

366.66 mT

Coating

[NiCuNi] nickel

36.29 with VAT / pcs + price for transport

29.50 ZŁ net + 23% VAT / pcs

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

bulk discounts:

Need more?

price from 1 pcs
29.50 ZŁ
36.29 ZŁ
price from 30 pcs
27.73 ZŁ
34.11 ZŁ
price from 90 pcs
25.96 ZŁ
31.93 ZŁ

Need advice?

Call us +48 22 499 98 98 alternatively get in touch through inquiry form through our site.
Weight along with shape of magnetic components can be verified on our force calculator.

Orders submitted before 14:00 will be dispatched today!

MPL 40x18x10 SH / N38 - lamellar magnet

Specification/characteristics MPL 40x18x10 SH / N38 - lamellar magnet
properties
values
Cat. no.
020157
GTIN
5906301811633
Production/Distribution
Dhit sp. z o.o.
Country of origin
Poland / China / Germany
Customs code
85059029
length
40 mm [±0,1 mm]
Width
18 mm [±0,1 mm]
Height
10 mm [±0,1 mm]
Weight
54 g [±0,1 mm]
Magnetization Direction
↑ axial
Magnetic Induction ~ ?
366.66 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

Block magnets are distinguished by a flat shape, which provides stable fixation. Model MPL 40x18x10 SH / N38 is made of strong sintered NdFeB, which ensures high holding capacity of 0 kg while maintaining compact dimensions. Their geometric shape fits perfectly for building separators, furniture systems, and sticking to flat surfaces. Furthermore, they are secured by a durable Ni-Cu-Ni anti-corrosion coating.
Disconnecting block magnets should be done by shifting one against the other, rather than pulling them apart forcefully. Try sliding one magnet off the edge until the force decreases. Watch your fingers, because magnets can snap back together, which is dangerous. With bigger magnets, it is worth using the edge of a table for leverage. Remember: never try to pry them with metal tools, as the magnet may crack.
These versatile magnets form the base for many technical solutions. They are used to build magnetic separators, generators, and also in the furniture industry as hidden locks. Due to their shape, they are easy to glue to walls, casings, or tools using mounting adhesive. They are also popular for organizing workshops and in model making.
Of course, these magnets can be stacked. Combining two magnets with attracting poles will increase the magnetic field, although it won't double the force (depending on dimensions). This allows you to build a more powerful system without buying a new, thicker block. Just remember to exercise caution during joining, as the attraction force can be very strong.
To stick neodymium magnets, it is best to use strong epoxy glues, such as epoxy resin. They guarantee a permanent bond with metal and are safe for the coating. For smaller magnets, 3M VHB mounting tape will also work. Remember to degrease the surface with alcohol, which improves durability.
Standard block magnets are magnetized through the thickness. This means, the N and S poles are on the largest flat surfaces. This ensures maximum pull force when mounted to a metal sheet. There are unusual versions magnetized through the length or width, which we can import for motor applications.

Advantages as well as disadvantages of neodymium magnets NdFeB.

In addition to their remarkable magnetic power, neodymium magnets offer the following advantages:

  • They virtually do not lose strength, because even after 10 years, the decline in efficiency is only ~1% (based on calculations),
  • Their ability to resist magnetic interference from external fields is notable,
  • Because of the reflective layer of nickel, the component looks aesthetically refined,
  • They have exceptional magnetic induction on the surface of the magnet,
  • Thanks to their enhanced temperature resistance, they can operate (depending on the shape) even at temperatures up to 230°C or more,
  • With the option for customized forming and targeted design, these magnets can be produced in multiple shapes and sizes, greatly improving engineering flexibility,
  • Wide application in cutting-edge sectors – they are used in hard drives, rotating machines, clinical machines as well as sophisticated instruments,
  • Thanks to their concentrated strength, small magnets offer high magnetic performance, while occupying minimal space,

Disadvantages of neodymium magnets:

  • They can break when subjected to a heavy 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 cracks , and at the same time reinforces its overall robustness,
  • High temperatures may significantly reduce the strength of neodymium magnets. Typically, above 80°C, they experience permanent deterioration in performance (depending on height). 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 recommended to use sealed magnets made of protective material for outdoor use,
  • The use of a protective casing or external holder is recommended, since machining threads in neodymium magnets is difficult,
  • Health risk due to small fragments may arise, especially if swallowed, which is significant in the family environments. Moreover, tiny components from these assemblies may hinder health screening after being swallowed,
  • Due to expensive raw materials, their cost is relatively high,

Maximum lifting force for a neodymium magnet – what affects it?

The given pulling force of the magnet means the maximum force, assessed in ideal conditions, namely:

  • using a steel plate with low carbon content, serving as a magnetic circuit closure
  • with a thickness of minimum 10 mm
  • with a smooth surface
  • in conditions of no clearance
  • with vertical force applied
  • at room temperature

Lifting capacity in real conditions – factors

The lifting capacity of a magnet is influenced by in practice key elements, ordered from most important to least 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 using a steel plate with a smooth surface of optimal thickness (min. 20 mm), under perpendicular pulling force, however under parallel forces the holding force is lower. In addition, even a minimal clearance {between} the magnet and the plate lowers the load capacity.

Caution with Neodymium Magnets

Magnets made of neodymium are delicate as well as can easily break as well as get damaged.

Magnets made of neodymium are delicate as well as will break if allowed to collide with each other, even from a distance of a few centimeters. Despite being made of metal and 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.

 Keep neodymium magnets far from 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.

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.

You should keep neodymium magnets at a safe distance from the wallet, computer, and TV.

Strong magnetic fields emitted by neodymium magnets can damage magnetic storage media such as floppy disks, credit cards, magnetic ID cards, cassette tapes, video tapes, or other devices. They can also damage televisions, VCRs, computer monitors, and CRT displays. Avoid placing neodymium magnets in close proximity to electronic devices.

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

Read the information on our website on how to properly utilize neodymium magnets and avoid significant harm to your body and unintentional damage to the magnets.

Neodymium magnets can demagnetize at high temperatures.

Despite the general resilience of magnets, their ability to retain their magnetic strength can be influenced by factors like the type of material used, the magnet's shape, and the intended purpose for which it is employed.

Avoid bringing neodymium magnets close to a phone or GPS.

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

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

Neodymium magnets will jump and also clash together within a distance of several to almost 10 cm from each other.

Dust and powder from neodymium magnets are highly flammable.

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

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.

Safety rules!

Please see 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