e-mail: bok@dhit.pl

neodymium magnets

We provide red color magnetic Nd2Fe14B - our proposal. All magnesy on our website are available for immediate delivery (see the list). See the magnet price list for more details check the magnet price list

Magnets for water searching F300 GOLD

Where to buy powerful neodymium magnet? Magnetic holders in airtight and durable enclosure are excellent for use in variable and difficult weather conditions, including during rain and snow more

magnetic holders

Magnetic holders can be applied to improve production, underwater discoveries, or finding meteors from gold check...

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MW 5x15 / N38 - cylindrical magnet

cylindrical magnet

Catalog no 010084

GTIN: 5906301810834

5

Diameter Ø [±0,1 mm]

5 mm

Height [±0,1 mm]

15 mm

Weight

2.21 g

Magnetization Direction

↑ axial

Load capacity

4.15 kg / 40.7 N

Magnetic Induction

610.03 mT

Coating

[NiCuNi] nickel

1.107 with VAT / pcs + price for transport

0.900 ZŁ net + 23% VAT / pcs

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MW 5x15 / N38 - cylindrical magnet
Specification/characteristics MW 5x15 / N38 - cylindrical magnet
properties
values
Cat. no.
010084
GTIN
5906301810834
Production/Distribution
Dhit sp. z o.o.
Country of origin
Poland / China / Germany
Customs code
85059029
Diameter Ø
5 mm [±0,1 mm]
Height
15 mm [±0,1 mm]
Weight
2.21 g [±0,1 mm]
Magnetization Direction
↑ axial
Load capacity ~ ?
4.15 kg / 40.7 N
Magnetic Induction ~ ?
610.03 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 powerful rod magnet, produced from modern NdFeB material, which, with dimensions of Ø5x15 mm, guarantees the highest energy density. This specific item boasts high dimensional repeatability and industrial build quality, making it a perfect solution for the most demanding engineers and designers. As a cylindrical magnet with significant force (approx. 4.15 kg), this product is in stock from our warehouse in Poland, ensuring lightning-fast order fulfillment. Moreover, its Ni-Cu-Ni coating secures it against corrosion in standard operating conditions, guaranteeing an aesthetic appearance and durability for years.
This model is created for building electric motors, advanced Hall effect sensors, and efficient filters, where maximum induction on a small surface counts. Thanks to the pull force of 40.7 N with a weight of only 2.21 g, this cylindrical magnet is indispensable in miniature devices and wherever low weight is crucial.
Since our magnets have a tolerance of ±0.1mm, the recommended way is to glue them into holes with a slightly larger diameter (e.g., 5.1 mm) using two-component epoxy glues. To ensure long-term durability in automation, anaerobic resins are used, which are safe for nickel and fill the gap, guaranteeing high repeatability of the connection.
Magnets NdFeB grade N38 are strong enough for 90% of applications in modeling and machine building, where excessive miniaturization with maximum force is not required. If you need even stronger magnets in the same volume (Ø5x15), contact us regarding higher grades (e.g., N50, N52), however, N38 is the standard in continuous sale in our store.
The presented product is a neodymium magnet with precisely defined parameters: diameter 5 mm and height 15 mm. The key parameter here is the holding force amounting to approximately 4.15 kg (force ~40.7 N), which, with such compact dimensions, proves the high power of the NdFeB material. The product has a [NiCuNi] coating, which secures it against oxidation, giving it an aesthetic, silvery shine.
This rod magnet is magnetized axially (along the height of 15 mm), which means that the N and S poles are located on the flat, circular surfaces. Thanks to this, the magnet can be easily glued into a hole and achieve a strong field on the front surface. On request, we can also produce versions magnetized through the diameter if your project requires it.

Strengths as well as weaknesses of NdFeB magnets.

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

  • They retain attractive force for nearly ten years – the loss is just ~1% (in theory),
  • Magnets effectively protect themselves against demagnetization caused by external fields,
  • Thanks to the elegant finish, the coating of nickel, gold-plated, or silver-plated gives an professional appearance,
  • Neodymium magnets generate maximum magnetic induction on a their surface, which ensures high operational effectiveness,
  • Thanks to resistance to high temperature, they can operate (depending on the form) even at temperatures up to 230°C and higher...
  • Thanks to freedom in forming and the capacity to adapt to specific needs,
  • Fundamental importance in electronics industry – they find application in computer drives, electric drive systems, diagnostic systems, also other advanced devices.
  • Compactness – despite small sizes they generate large force, making them ideal for precision applications

Cons of neodymium magnets: weaknesses and usage proposals

  • At strong impacts they can break, therefore we advise placing them in special holders. A metal housing provides additional protection against damage, as well as increases the magnet's durability.
  • Neodymium magnets demagnetize when exposed to high temperatures. After reaching 80°C, many of them experience permanent weakening of power (a factor is the shape and 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
  • Due to the susceptibility of magnets to corrosion in a humid environment, we recommend using waterproof magnets made of rubber, plastic or other material resistant to moisture, when using outdoors
  • Due to limitations in creating threads and complex shapes in magnets, we recommend using cover - magnetic holder.
  • Potential hazard to health – tiny shards of magnets pose a threat, when accidentally swallowed, which becomes key in the context of child safety. Furthermore, tiny parts of these magnets can complicate diagnosis medical when they are in the body.
  • Higher cost of purchase is a significant factor to consider compared to ceramic magnets, especially in budget applications

Maximum holding power of the magnet – what affects it?

Breakaway force was determined for ideal contact conditions, including:

  • on a base made of mild steel, optimally conducting the magnetic field
  • with a cross-section of at least 10 mm
  • characterized by smoothness
  • with direct contact (without coatings)
  • under axial force direction (90-degree angle)
  • in stable room temperature

Practical aspects of lifting capacity – factors

During everyday use, the actual holding force results from a number of factors, presented from the most important:

  • Clearance – the presence of any layer (rust, tape, air) acts as an insulator, which lowers power steeply (even by 50% at 0.5 mm).
  • Loading method – catalog parameter refers to pulling vertically. When attempting to slide, the magnet exhibits much less (often approx. 20-30% of nominal force).
  • Metal thickness – the thinner the sheet, the weaker the hold. Magnetic flux penetrates through instead of generating force.
  • Metal type – not every steel reacts the same. Alloy additives worsen the attraction effect.
  • Smoothness – ideal contact is possible only on smooth steel. Rough texture create air cushions, weakening the magnet.
  • Temperature – heating the magnet results in weakening of induction. It is worth remembering the maximum operating temperature for a given model.

* Holding force was tested on the plate surface of 20 mm thickness, when a perpendicular force was applied, whereas under parallel forces the lifting capacity is smaller. In addition, even a small distance {between} the magnet and the plate reduces the lifting capacity.

Safe handling of NdFeB magnets

Keep away from computers

Powerful magnetic fields can corrupt files on payment cards, HDDs, and storage devices. Keep a distance of min. 10 cm.

This is not a toy

These products are not intended for children. Accidental ingestion of several magnets may result in them connecting inside the digestive tract, which poses a critical condition and necessitates urgent medical intervention.

Do not overheat magnets

Control the heat. Exposing the magnet to high heat will permanently weaken its magnetic structure and strength.

Compass and GPS

A strong magnetic field interferes with the operation of compasses in phones and navigation systems. Keep magnets near a device to prevent damaging the sensors.

Sensitization to coating

Some people suffer from a hypersensitivity to nickel, which is the standard coating for NdFeB magnets. Prolonged contact can result in dermatitis. We suggest use protective gloves.

Serious injuries

Large magnets can break fingers instantly. Under no circumstances put your hand between two strong magnets.

Shattering risk

NdFeB magnets are sintered ceramics, meaning they are prone to chipping. Collision of two magnets will cause them cracking into small pieces.

Handling guide

Exercise caution. Rare earth magnets attract from a distance and connect with huge force, often quicker than you can move away.

Do not drill into magnets

Powder generated during machining of magnets is flammable. Do not drill into magnets unless you are an expert.

ICD Warning

For implant holders: Powerful magnets disrupt electronics. Keep at least 30 cm distance or ask another person to work with the magnets.

Caution!

Need more info? Check our post: Are neodymium magnets dangerous?

Dhit sp. z o.o.

e-mail: bok@dhit.pl

tel: +48 888 99 98 98