e-mail: bok@dhit.pl

neodymium magnets

We offer blue color magnetic Nd2Fe14B - our store's offer. All "magnets" on our website are available for immediate purchase (see the list). See the magnet price list for more details check the magnet price list

Magnet for treasure hunters F300 GOLD

Where to purchase very strong neodymium magnet? Magnet holders in airtight and durable steel enclosure are ideally suited for use in difficult, demanding weather conditions, including during snow and rain check

magnetic holders

Magnetic holders can be applied to facilitate production, underwater discoveries, or locating meteorites from gold read...

We promise to ship your order on the day of purchase before 2:00 PM on weekdays.

Dhit sp. z o.o.
Product available Ships in 3 days

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

bulk discounts:

Need more?

price from 1 pcs
11.84 ZŁ
14.56 ZŁ
price from 60 pcs
11.13 ZŁ
13.69 ZŁ
price from 220 pcs
10.42 ZŁ
12.82 ZŁ

Need help making a decision?

Call us now +48 888 99 98 98 otherwise contact us by means of inquiry form the contact section.
Specifications as well as structure of a magnet can be analyzed using our modular calculator.

Orders submitted before 14:00 will be dispatched today!

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

This product is an extremely strong plate magnet made of NdFeB material, which, with dimensions of 50x20x5 mm and a weight of 37.5 g, guarantees premium class connection. As a magnetic bar with high power (approx. 12.49 kg), this product is available off-the-shelf from our warehouse in Poland. Additionally, its Ni-Cu-Ni coating secures it against corrosion in standard operating conditions, giving it an aesthetic appearance.
Separating block magnets requires a technique based on sliding (moving one relative to the other), rather than forceful pulling apart. 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 magnetic separators and linear motors. Thanks to the flat surface and high force (approx. 12.49 kg), they are ideal as hidden locks in furniture making and mounting elements in automation. Their rectangular shape facilitates precise gluing into milled sockets in wood or plastic.
For mounting flat magnets MPL 50x20x5 / N38, it is best to use strong epoxy glues (e.g., UHU Endfest, Distal), which ensure a durable bond with metal or plastic. For lighter applications or mounting on smooth surfaces, branded foam tape (e.g., 3M VHB) will work, provided the surface is perfectly degreased. 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.
This model is characterized by dimensions 50x20x5 mm, which, at a weight of 37.5 g, makes it an element with impressive energy density. The key parameter here is the holding force amounting to approximately 12.49 kg (force ~122.49 N), which, with such a flat shape, proves the high grade of the material. The protective [NiCuNi] coating secures the magnet against corrosion.

Strengths as well as weaknesses of neodymium magnets.

In addition to their magnetic efficiency, neodymium magnets provide the following advantages:

  • They retain attractive force for almost ten years – the drop is just ~1% (according to analyses),
  • Neodymium magnets prove to be highly resistant to demagnetization caused by external field sources,
  • By applying a smooth coating of nickel, the element has an proper look,
  • Magnetic induction on the working part of the magnet turns out to be very high,
  • Neodymium magnets are characterized by very high magnetic induction on the magnet surface and are able to act (depending on the shape) even at a temperature of 230°C or more...
  • Possibility of detailed forming and adapting to atypical applications,
  • Key role in modern technologies – they are commonly used in hard drives, electric drive systems, advanced medical instruments, as well as other advanced devices.
  • Thanks to efficiency per cm³, small magnets offer high operating force, occupying minimum space,

Disadvantages of NdFeB magnets:

  • At strong impacts they can break, therefore we advise placing them in steel cases. A metal housing provides additional protection against damage and increases the magnet's durability.
  • We warn that neodymium magnets can lose their strength at high temperatures. To prevent this, we suggest our specialized [AH] magnets, which work effectively even at 230°C.
  • Magnets exposed to a humid environment can rust. Therefore during using outdoors, we recommend using water-impermeable magnets made of rubber, plastic or other material resistant to moisture
  • Due to limitations in realizing nuts and complex shapes in magnets, we recommend using cover - magnetic mechanism.
  • Health risk related to microscopic parts of magnets are risky, when accidentally swallowed, which is particularly important in the context of child safety. It is also worth noting that tiny parts of these devices are able to disrupt the diagnostic process medical in case of swallowing.
  • With large orders the cost of neodymium magnets is economically unviable,

Breakaway strength of the magnet in ideal conditionswhat it depends on?

Magnet power is the result of a measurement for optimal configuration, taking into account:

  • with the use of a yoke made of low-carbon steel, ensuring maximum field concentration
  • with a cross-section no less than 10 mm
  • with an ideally smooth contact surface
  • with direct contact (no impurities)
  • under perpendicular application of breakaway force (90-degree angle)
  • at temperature room level

Lifting capacity in real conditions – factors

Holding efficiency impacted by working environment parameters, mainly (from most important):

  • Gap between magnet and steel – every millimeter of separation (caused e.g. by veneer or dirt) significantly weakens the pulling force, often by half at just 0.5 mm.
  • Loading method – catalog parameter refers to pulling vertically. When attempting to slide, the magnet exhibits much less (typically approx. 20-30% of maximum force).
  • Metal thickness – the thinner the sheet, the weaker the hold. Part of the magnetic field passes through the material instead of generating force.
  • Material composition – different alloys attracts identically. Alloy additives worsen the attraction effect.
  • Base smoothness – the more even the plate, the larger the contact zone and stronger the hold. Roughness creates an air distance.
  • Temperature – temperature increase causes a temporary drop of force. It is worth remembering the maximum operating temperature for a given model.

* Lifting capacity was measured using a smooth steel plate of optimal thickness (min. 20 mm), under vertically applied force, whereas under attempts to slide the magnet the lifting capacity is smaller. Moreover, even a small distance {between} the magnet and the plate lowers the load capacity.

Warnings

Swallowing risk

Neodymium magnets are not suitable for play. Accidental ingestion of several magnets may result in them connecting inside the digestive tract, which constitutes a critical condition and requires immediate surgery.

Cards and drives

Equipment safety: Strong magnets can damage data carriers and delicate electronics (heart implants, medical aids, timepieces).

Impact on smartphones

GPS units and mobile phones are extremely sensitive to magnetism. Direct contact with a strong magnet can ruin the sensors in your phone.

Do not overheat magnets

Monitor thermal conditions. Exposing the magnet above 80 degrees Celsius will ruin its magnetic structure and strength.

Handling guide

Before use, check safety instructions. Sudden snapping can break the magnet or injure your hand. Be predictive.

Machining danger

Drilling and cutting of NdFeB material carries a risk of fire hazard. Magnetic powder oxidizes rapidly with oxygen and is difficult to extinguish.

Material brittleness

Protect your eyes. Magnets can fracture upon violent connection, launching shards into the air. We recommend safety glasses.

Allergy Warning

Allergy Notice: The nickel-copper-nickel coating consists of nickel. If redness appears, cease working with magnets and wear gloves.

Life threat

For implant holders: Powerful magnets disrupt medical devices. Maintain minimum 30 cm distance or request help to handle the magnets.

Pinching danger

Big blocks can break fingers instantly. Under no circumstances place your hand betwixt two strong magnets.

Important!

Details about hazards in the article: Safety of working with magnets.

Dhit sp. z o.o.

e-mail: bok@dhit.pl

tel: +48 888 99 98 98