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neodymium magnets

We provide blue color magnets Nd2Fe14B - our proposal. All "neodymium magnets" in our store are in stock for immediate delivery (check the list). See the magnet price list for more details check the magnet price list

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MPL 50x20x5 / N38 - lamellar magnet

lamellar magnet

Catalog no 020473

GTIN: 5906301811930

5

length

50 mm [±0,1 mm]

Width

20 mm [±0,1 mm]

Height

5 mm [±0,1 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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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
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 an ideal solution for building separators and machines. As a magnetic bar with high power (approx. 12.49 kg), this product is available immediately from our warehouse in Poland. Additionally, its Ni-Cu-Ni coating protects 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 extreme caution, because after separation, the magnets may want to violently snap back together, which threatens pinching the skin. Never use metal tools for prying, as the brittle NdFeB material may chip and damage your eyes.
They constitute a key element in the production of wind generators and material handling systems. They work great as fasteners under tiles, wood, or glass. Their rectangular shape facilitates precise gluing into milled sockets in wood or plastic.
Cyanoacrylate glues (super glue type) are good only for small magnets; for larger plates, we recommend resins. Double-sided tape cushions vibrations, which is an advantage when mounting in moving elements. Avoid chemically aggressive glues or hot glue, which can demagnetize neodymium (above 80°C).
The magnetic axis runs through the shortest dimension, which is typical for gripper magnets. 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 rare earth magnets.

In addition to their long-term stability, neodymium magnets provide the following advantages:

  • They do not lose strength, even over around ten years – the decrease in power is only ~1% (theoretically),
  • Magnets very well defend themselves against loss of magnetization caused by ambient magnetic noise,
  • In other words, due to the aesthetic layer of gold, the element is aesthetically pleasing,
  • The surface of neodymium magnets generates a concentrated magnetic field – this is a distinguishing feature,
  • Through (appropriate) combination of ingredients, they can achieve high thermal resistance, allowing for functioning at temperatures approaching 230°C and above...
  • Thanks to flexibility in forming and the ability to customize to specific needs,
  • Universal use in advanced technology sectors – they are used in HDD drives, drive modules, medical equipment, also technologically advanced constructions.
  • Thanks to efficiency per cm³, small magnets offer high operating force, occupying minimum space,

Disadvantages of neodymium magnets:

  • At strong impacts they can crack, therefore we advise placing them in special holders. A metal housing provides additional protection against damage and increases the magnet's durability.
  • When exposed to high temperature, neodymium magnets experience a drop in force. Often, when the temperature exceeds 80°C, their power decreases (depending on the size and shape of the magnet). For those who need magnets for extreme conditions, we offer [AH] versions withstanding up to 230°C
  • They oxidize in a humid environment. For use outdoors we suggest using waterproof magnets e.g. in rubber, plastic
  • Due to limitations in realizing nuts and complex shapes in magnets, we propose using cover - magnetic holder.
  • Health risk related to microscopic parts of magnets pose a threat, if swallowed, which becomes key in the context of child health protection. Additionally, tiny parts of these magnets can be problematic in diagnostics medical when they are in the body.
  • Due to expensive raw materials, their price exceeds standard values,

Maximum holding power of the magnet – what contributes to it?

The lifting capacity listed is a measurement result performed under the following configuration:

  • with the contact of a sheet made of low-carbon steel, ensuring maximum field concentration
  • possessing a massiveness of at least 10 mm to avoid saturation
  • with a surface cleaned and smooth
  • with zero gap (no paint)
  • under perpendicular force vector (90-degree angle)
  • at room temperature

Determinants of lifting force in real conditions

In real-world applications, the real power is determined by several key aspects, presented from crucial:

  • Space between magnet and steel – every millimeter of separation (caused e.g. by veneer or dirt) drastically reduces the pulling force, often by half at just 0.5 mm.
  • Force direction – declared lifting capacity refers to detachment vertically. When attempting to slide, the magnet holds significantly lower power (typically approx. 20-30% of maximum force).
  • Base massiveness – too thin sheet does not accept the full field, causing part of the power to be wasted into the air.
  • Material type – ideal substrate is pure iron steel. Hardened steels may attract less.
  • Surface finish – full contact is possible only on polished steel. Rough texture create air cushions, reducing force.
  • Thermal factor – hot environment weakens pulling force. Too high temperature can permanently demagnetize the magnet.

* Lifting capacity testing was performed on a smooth plate of optimal thickness, under a perpendicular pulling force, in contrast under attempts to slide the magnet the load capacity is reduced by as much as 5 times. In addition, even a slight gap {between} the magnet’s surface and the plate decreases the holding force.

Precautions when working with NdFeB magnets

Heat sensitivity

Standard neodymium magnets (N-type) lose power when the temperature goes above 80°C. The loss of strength is permanent.

Pinching danger

Pinching hazard: The pulling power is so immense that it can result in blood blisters, pinching, and even bone fractures. Use thick gloves.

Allergy Warning

Medical facts indicate that the nickel plating (the usual finish) is a common allergen. If you have an allergy, refrain from direct skin contact and choose encased magnets.

Safe operation

Exercise caution. Neodymium magnets attract from a distance and snap with massive power, often quicker than you can react.

Fire risk

Fire hazard: Rare earth powder is explosive. Avoid machining magnets without safety gear as this may cause fire.

Shattering risk

NdFeB magnets are sintered ceramics, meaning they are prone to chipping. Clashing of two magnets leads to them breaking into shards.

Product not for children

Adult use only. Tiny parts pose a choking risk, causing serious injuries. Keep out of reach of kids and pets.

Phone sensors

GPS units and smartphones are extremely sensitive to magnetism. Direct contact with a powerful NdFeB magnet can permanently damage the internal compass in your phone.

Danger to pacemakers

People with a heart stimulator should keep an absolute distance from magnets. The magnetic field can interfere with the functioning of the life-saving device.

Electronic hazard

Avoid bringing magnets near a purse, computer, or TV. The magnetic field can permanently damage these devices and wipe information from cards.

Caution!

Learn more about hazards in the article: Magnet Safety Guide.

Dhit sp. z o.o.

e-mail: bok@dhit.pl

tel: +48 888 99 98 98