tel: +48 22 499 98 98

neodymium magnets

We provide red color magnetic Nd2Fe14B - our store's offer. Practically all magnesy neodymowe on our website are in stock for immediate delivery (check the list). See the magnet pricing for more details check the magnet price list

Magnet for water searching F300 GOLD

Where to purchase powerful magnet? Magnetic holders in solid and airtight steel casing are perfect for use in difficult weather conditions, including during rain and snow check

magnetic holders

Magnetic holders can be used to enhance production, underwater discoveries, or searching for meteors from gold see more...

Shipping is shipped on the day of purchase by 2:00 PM on business days.

Dhit sp. z o.o.
Product available Ships tomorrow

MW 20x5 / N38 - cylindrical magnet

cylindrical magnet

Catalog no 010044

GTIN: 5906301810438

5

Diameter Ø [±0,1 mm]

20 mm

Height [±0,1 mm]

5 mm

Weight

11.78 g

Magnetization Direction

↑ axial

Load capacity

5.53 kg / 54.23 N

Magnetic Induction

277.16 mT

Coating

[NiCuNi] nickel

5.56 with VAT / pcs + price for transport

4.52 ZŁ net + 23% VAT / pcs

bulk discounts:

Need more?

price from 1 pcs
4.52 ZŁ
5.56 ZŁ
price from 150 pcs
4.25 ZŁ
5.23 ZŁ
price from 600 pcs
3.98 ZŁ
4.89 ZŁ

Do you have problems deciding?

Call us +48 888 99 98 98 alternatively drop us a message via our online form through our site.
Parameters along with shape of a neodymium magnet can be reviewed using our our magnetic calculator.

Orders submitted before 14:00 will be dispatched today!

MW 20x5 / N38 - cylindrical magnet
Specification/characteristics MW 20x5 / N38 - cylindrical magnet
properties
values
Cat. no.
010044
GTIN
5906301810438
Production/Distribution
Dhit sp. z o.o.
Country of origin
Poland / China / Germany
Customs code
85059029
Diameter Ø
20 mm [±0,1 mm]
Height
5 mm [±0,1 mm]
Weight
11.78 g [±0,1 mm]
Magnetization Direction
↑ axial
Load capacity ~ ?
5.53 kg / 54.23 N
Magnetic Induction ~ ?
277.16 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 incredibly powerful rod magnet, produced from durable NdFeB material, which, at dimensions of Ø20x5 mm, guarantees maximum efficiency. The MW 20x5 / N38 component is characterized by high dimensional repeatability and industrial build quality, making it an ideal solution for professional engineers and designers. As a cylindrical magnet with significant force (approx. 5.53 kg), this product is available off-the-shelf from our warehouse in Poland, ensuring rapid order fulfillment. Moreover, its triple-layer Ni-Cu-Ni coating effectively protects it against corrosion in standard operating conditions, ensuring an aesthetic appearance and durability for years.
It finds application in DIY projects, advanced automation, and broadly understood industry, serving as a fastening or actuating element. Thanks to the pull force of 54.23 N with a weight of only 11.78 g, this rod is indispensable in miniature devices and wherever low weight is crucial.
Due to the brittleness of the NdFeB material, you must not use force-fitting (so-called press-fit), as this risks chipping the coating of this precision component. To ensure stability in industry, specialized industrial adhesives are used, which do not react with the nickel coating and fill the gap, guaranteeing durability of the connection.
Grade N38 is the most frequently chosen standard for professional neodymium magnets, offering an optimal price-to-power ratio and operational stability. If you need the strongest magnets in the same volume (Ø20x5), contact us regarding higher grades (e.g., N50, N52), however, N38 is the standard available off-the-shelf in our warehouse.
This model is characterized by dimensions Ø20x5 mm, which, at a weight of 11.78 g, makes it an element with impressive magnetic energy density. The key parameter here is the holding force amounting to approximately 5.53 kg (force ~54.23 N), which, with such defined dimensions, proves the high power of the NdFeB material. The product has a [NiCuNi] coating, which secures it against external factors, giving it an aesthetic, silvery shine.
This rod magnet is magnetized axially (along the height of 5 mm), which means that the N and S poles are located on the flat, circular surfaces. Such an arrangement is most desirable when connecting magnets in stacks (e.g., in filters) or when mounting in sockets at the bottom of a hole. On request, we can also produce versions magnetized diametrically if your project requires it.

Advantages and disadvantages of rare earth magnets.

Apart from their superior magnetism, neodymium magnets have these key benefits:

  • They do not lose power, even over nearly ten years – the reduction in power is only ~1% (based on measurements),
  • They show high resistance to demagnetization induced by external magnetic fields,
  • A magnet with a smooth nickel surface looks better,
  • Magnetic induction on the working part of the magnet remains strong,
  • Thanks to resistance to high temperature, they are able to function (depending on the shape) even at temperatures up to 230°C and higher...
  • Thanks to the potential of free molding and customization to individualized requirements, NdFeB magnets can be created in a broad palette of forms and dimensions, which increases their versatility,
  • Universal use in future technologies – they are commonly used in magnetic memories, electromotive mechanisms, advanced medical instruments, and other advanced devices.
  • Thanks to their power density, small magnets offer high operating force, with minimal size,

Characteristics of disadvantages of neodymium magnets: application proposals

  • Brittleness is one of their disadvantages. Upon intense impact they can fracture. We recommend keeping them in a steel housing, which not only protects them against impacts but also increases their durability
  • When exposed to high temperature, neodymium magnets suffer a drop in strength. Often, when the temperature exceeds 80°C, their strength 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
  • Magnets exposed to a humid environment can corrode. Therefore during using outdoors, we recommend using waterproof magnets made of rubber, plastic or other material protecting against moisture
  • Due to limitations in producing nuts and complicated forms in magnets, we recommend using a housing - magnetic mount.
  • Health risk resulting from small fragments of magnets pose a threat, when accidentally swallowed, which becomes key in the context of child safety. It is also worth noting that small components of these magnets can be problematic in diagnostics medical after entering the body.
  • High unit price – neodymium magnets have a higher price than other types of magnets (e.g. ferrite), which can limit application in large quantities

Detachment force of the magnet in optimal conditionswhat contributes to it?

The specified lifting capacity refers to the limit force, measured under ideal test conditions, meaning:

  • using a plate made of high-permeability steel, functioning as a circuit closing element
  • possessing a massiveness of at least 10 mm to avoid saturation
  • with an ideally smooth contact surface
  • under conditions of ideal adhesion (metal-to-metal)
  • during detachment in a direction vertical to the mounting surface
  • in temp. approx. 20°C

Determinants of practical lifting force of a magnet

In practice, the actual holding force depends on a number of factors, ranked from most significant:

  • Gap (betwixt the magnet and the plate), because even a tiny clearance (e.g. 0.5 mm) leads to a decrease in lifting capacity by up to 50% (this also applies to paint, rust or dirt).
  • Force direction – catalog parameter refers to pulling vertically. When attempting to slide, the magnet exhibits much less (often approx. 20-30% of nominal force).
  • Base massiveness – too thin sheet causes magnetic saturation, causing part of the flux to be lost to the other side.
  • Metal type – different alloys reacts the same. Alloy additives worsen the attraction effect.
  • Surface finish – ideal contact is obtained only on polished steel. Any scratches and bumps reduce the real contact area, weakening the magnet.
  • Temperature influence – hot environment weakens pulling force. Exceeding the limit temperature can permanently demagnetize the magnet.

* Lifting capacity testing was carried out on a smooth plate of suitable thickness, under perpendicular forces, whereas under attempts to slide the magnet the lifting capacity is smaller. Moreover, even a small distance {between} the magnet’s surface and the plate lowers the lifting capacity.

H&S for magnets

Eye protection

Protect your eyes. Magnets can explode upon violent connection, ejecting sharp fragments into the air. We recommend safety glasses.

Bone fractures

Mind your fingers. Two powerful magnets will snap together instantly with a force of massive weight, crushing everything in their path. Exercise extreme caution!

Combustion hazard

Machining of NdFeB material carries a risk of fire hazard. Neodymium dust oxidizes rapidly with oxygen and is hard to extinguish.

Avoid contact if allergic

Studies show that nickel (standard magnet coating) is a potent allergen. If you have an allergy, avoid direct skin contact and select versions in plastic housing.

Do not underestimate power

Before use, read the rules. Sudden snapping can destroy the magnet or injure your hand. Be predictive.

Operating temperature

Watch the temperature. Heating the magnet to high heat will permanently weaken its magnetic structure and pulling force.

Safe distance

Intense magnetic fields can erase data on payment cards, hard drives, and storage devices. Keep a distance of min. 10 cm.

Danger to pacemakers

People with a ICD should maintain an safe separation from magnets. The magnetic field can disrupt the operation of the life-saving device.

Keep away from electronics

A powerful magnetic field disrupts the operation of compasses in smartphones and GPS navigation. Do not bring magnets close to a smartphone to prevent damaging the sensors.

Choking Hazard

Strictly store magnets away from children. Risk of swallowing is significant, and the consequences of magnets connecting inside the body are tragic.

Attention!

Want to know more? Check our post: Why are neodymium magnets dangerous?

Dhit sp. z o.o.

e-mail: bok@dhit.pl

tel: +48 888 99 98 98