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neodymium magnets

We provide yellow color magnets Nd2Fe14B - our offer. Practically all "magnets" in our store are available for immediate purchase (see the list). See the magnet price list for more details see the magnet price list

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magnetic holders

Magnetic holders can be applied to facilitate manufacturing, underwater discoveries, or searching for meteors made of metal more information...

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MPL 50x20x5 / N38 - lamellar magnet

lamellar magnet

Catalog no 020473

GTIN: 5906301811930

5

length [±0,1 mm]

50 mm

Width [±0,1 mm]

20 mm

Height [±0,1 mm]

5 mm

Weight

37.5 g

Magnetization Direction

↑ axial

Load capacity

12.49 kg / 122.49 N

Magnetic Induction

197.73 mT

Coating

[NiCuNi] nickel

14.56 with VAT / pcs + price for transport

11.84 ZŁ net + 23% VAT / pcs

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Parameters as well as structure of a neodymium magnet can be tested using our modular calculator.

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MPL 50x20x5 / N38 - lamellar magnet
Specification/characteristics MPL 50x20x5 / N38 - lamellar magnet
properties
values
Cat. no.
020473
GTIN
5906301811930
Production/Distribution
Dhit sp. z o.o.
Country of origin
Poland / China / Germany
Customs code
85059029
length
50 mm [±0,1 mm]
Width
20 mm [±0,1 mm]
Height
5 mm [±0,1 mm]
Weight
37.5 g [±0,1 mm]
Magnetization Direction
↑ axial
Load capacity ~ ?
12.49 kg / 122.49 N
Magnetic Induction ~ ?
197.73 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 sintered neodymium magnets Nd2Fe14B at 20°C

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

Model MPL 50x20x5 / N38 features a low profile and professional pulling force, making it a perfect solution for building separators and machines. As a block magnet with high power (approx. 12.49 kg), this product is available immediately from our warehouse in Poland. Additionally, its Ni-Cu-Ni coating secures it against corrosion in standard operating conditions, giving it an aesthetic appearance.
The key to success is shifting the magnets along their largest connection plane (using e.g., the edge of a table), which is easier than trying to tear them apart directly. To separate the MPL 50x20x5 / N38 model, firmly slide one magnet over the edge of the other until the attraction force decreases. We recommend care, because after separation, the magnets may want to violently snap back together, which threatens pinching the skin. Using a screwdriver risks destroying the coating and permanently cracking the magnet.
Plate magnets MPL 50x20x5 / N38 are the foundation for many industrial devices, such as filters catching filings and linear motors. They work great as fasteners under tiles, wood, or glass. Customers often choose this model for workshop organization on strips and for advanced DIY and modeling projects, where precision and power count.
For mounting flat magnets MPL 50x20x5 / N38, we recommend utilizing strong epoxy glues (e.g., UHU Endfest, Distal), which ensure a durable bond with metal or plastic. Double-sided tape cushions vibrations, which is an advantage when mounting in moving elements. Remember to clean and degrease the magnet surface before gluing, which significantly increases the adhesion of the glue to the nickel coating.
Standardly, the MPL 50x20x5 / N38 model is magnetized through the thickness (dimension 5 mm), which means that the N and S poles are located on its largest, flat surfaces. In practice, this means that this magnet has the greatest attraction force on its main planes (50x20 mm), which is ideal for flat mounting. Such a pole arrangement ensures maximum holding capacity when pressing against the sheet, creating a closed magnetic circuit.
The presented product is a neodymium magnet with precisely defined parameters: 50 mm (length), 20 mm (width), and 5 mm (thickness). The key parameter here is the holding force amounting to approximately 12.49 kg (force ~122.49 N), which, with such a compact shape, proves the high grade of the material. The protective [NiCuNi] coating secures the magnet against corrosion.

Pros and cons of NdFeB magnets.

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

  • They have unchanged lifting capacity, and over nearly 10 years their performance decreases symbolically – ~1% (according to theory),
  • They maintain their magnetic properties even under external field action,
  • A magnet with a metallic nickel surface has an effective appearance,
  • Magnets possess huge magnetic induction on the active area,
  • Made from properly selected components, these magnets show impressive resistance to high heat, enabling them to function (depending on their shape) at temperatures up to 230°C and above...
  • Due to the potential of flexible forming and customization to specialized needs, neodymium magnets can be produced in a variety of forms and dimensions, which increases their versatility,
  • Universal use in high-tech industry – they are utilized in computer drives, electric drive systems, diagnostic systems, also multitasking production systems.
  • Compactness – despite small sizes they offer powerful magnetic field, making them ideal for precision applications

Disadvantages of NdFeB magnets:

  • At very strong impacts they can crack, therefore we recommend placing them in steel cases. A metal housing provides additional protection against damage and increases the magnet's durability.
  • Neodymium magnets demagnetize when exposed to high temperatures. After reaching 80°C, many of them experience permanent weakening of strength (a factor is the shape as well as dimensions of the magnet). We offer magnets specially adapted to work at temperatures up to 230°C marked [AH], which are extremely resistant to heat
  • Magnets exposed to a humid environment can rust. Therefore when using outdoors, we suggest using waterproof magnets made of rubber, plastic or other material resistant to moisture
  • Due to limitations in creating nuts and complicated shapes in magnets, we propose using casing - magnetic mount.
  • Possible danger related to microscopic parts of magnets pose a threat, if swallowed, which is particularly important in the aspect of protecting the youngest. It is also worth noting that small elements of these products are able to be problematic in diagnostics medical in case of swallowing.
  • Higher cost of purchase is one of the disadvantages compared to ceramic magnets, especially in budget applications

Best holding force of the magnet in ideal parameterswhat it depends on?

Holding force of 12.49 kg is a theoretical maximum value performed under standard conditions:

  • on a base made of structural steel, perfectly concentrating the magnetic field
  • with a cross-section no less than 10 mm
  • with a surface perfectly flat
  • with zero gap (without paint)
  • during detachment in a direction vertical to the plane
  • at conditions approx. 20°C

Key elements affecting lifting force

Effective lifting capacity is influenced by specific conditions, such as (from priority):

  • Space between surfaces – every millimeter of distance (caused e.g. by varnish or dirt) significantly weakens the pulling force, often by half at just 0.5 mm.
  • Pull-off angle – remember that the magnet has greatest strength perpendicularly. Under shear forces, the capacity drops drastically, often to levels of 20-30% of the nominal value.
  • Wall thickness – the thinner the sheet, the weaker the hold. Magnetic flux penetrates through instead of generating force.
  • Steel type – low-carbon steel attracts best. Higher carbon content lower magnetic properties and lifting capacity.
  • Surface quality – the more even the surface, the better the adhesion and higher the lifting capacity. Unevenness acts like micro-gaps.
  • Thermal factor – hot environment reduces magnetic field. Too high temperature can permanently demagnetize the magnet.

* Holding force was checked on the plate surface of 20 mm thickness, when a perpendicular force was applied, however under attempts to slide the magnet the load capacity is reduced by as much as fivefold. Additionally, even a slight gap {between} the magnet and the plate decreases the lifting capacity.

Precautions when working with neodymium magnets

Allergy Warning

Studies show that the nickel plating (standard magnet coating) is a common allergen. If your skin reacts to metals, refrain from touching magnets with bare hands and choose versions in plastic housing.

Electronic hazard

Avoid bringing magnets close to a purse, laptop, or TV. The magnetism can irreversibly ruin these devices and erase data from cards.

Conscious usage

Handle with care. Neodymium magnets attract from a long distance and connect with huge force, often faster than you can react.

Threat to navigation

An intense magnetic field disrupts the operation of magnetometers in smartphones and GPS navigation. Maintain magnets close to a device to avoid damaging the sensors.

Warning for heart patients

Patients with a pacemaker have to maintain an safe separation from magnets. The magnetism can disrupt the operation of the implant.

Operating temperature

Monitor thermal conditions. Heating the magnet to high heat will permanently weaken its magnetic structure and pulling force.

Risk of cracking

Despite the nickel coating, the material is delicate and cannot withstand shocks. Do not hit, as the magnet may shatter into sharp, dangerous pieces.

No play value

Neodymium magnets are not intended for children. Swallowing several magnets may result in them connecting inside the digestive tract, which constitutes a severe health hazard and requires urgent medical intervention.

Crushing risk

Protect your hands. Two large magnets will join instantly with a force of massive weight, destroying anything in their path. Be careful!

Mechanical processing

Mechanical processing of neodymium magnets carries a risk of fire risk. Magnetic powder oxidizes rapidly with oxygen and is hard to extinguish.

Safety First!

Details about risks in the article: Magnet Safety Guide.

Dhit sp. z o.o.

e-mail: bok@dhit.pl

tel: +48 888 99 98 98