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neodymium magnets

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MW 5x15 / N38 - cylindrical magnet

cylindrical magnet

Catalog no 010084

GTIN: 5906301810834

5

Diameter Ø

5 mm [±0,1 mm]

Height

15 mm [±0,1 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
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

The presented product is an extremely powerful cylinder magnet, composed of durable NdFeB material, which, with dimensions of Ø5x15 mm, guarantees the highest energy density. The MW 5x15 / N38 model is characterized by high dimensional repeatability and professional build quality, making it an ideal solution for professional engineers and designers. As a magnetic rod with impressive force (approx. 4.15 kg), this product is in stock from our European logistics center, ensuring quick order fulfillment. Additionally, its triple-layer Ni-Cu-Ni coating shields it against corrosion in standard operating conditions, guaranteeing an aesthetic appearance and durability for years.
It successfully proves itself in DIY projects, advanced automation, and broadly understood industry, serving as a fastening or actuating element. Thanks to the high power of 40.7 N with a weight of only 2.21 g, this cylindrical magnet is indispensable in miniature devices and wherever every gram matters.
Since our magnets have a tolerance of ±0.1mm, the best method is to glue them into holes with a slightly larger diameter (e.g., 5.1 mm) using two-component epoxy glues. To ensure stability in industry, specialized industrial adhesives 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 the majority of applications in automation and machine building, where extreme miniaturization with maximum force is not required. If you need the strongest 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 value of 40.7 N means that the magnet is capable of holding a weight many times exceeding its own mass of 2.21 g. The product has a [NiCuNi] coating, which secures it against external factors, giving it an aesthetic, silvery shine.
This cylinder is magnetized axially (along the height of 15 mm), which means that the N and S poles are located on the flat, circular surfaces. Such an arrangement is standard 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 through the diameter if your project requires it.

Advantages and disadvantages of NdFeB magnets.

Besides their remarkable strength, neodymium magnets offer the following advantages:

  • They have unchanged lifting capacity, and over nearly 10 years their attraction force decreases symbolically – ~1% (according to theory),
  • They possess excellent resistance to magnetism drop when exposed to opposing magnetic fields,
  • In other words, due to the smooth surface of nickel, the element is aesthetically pleasing,
  • Magnets have exceptionally strong magnetic induction on the surface,
  • Due to their durability and thermal resistance, neodymium magnets are capable of operate (depending on the shape) even at high temperatures reaching 230°C or more...
  • Considering the possibility of accurate molding and adaptation to individualized solutions, NdFeB magnets can be created in a variety of forms and dimensions, which expands the range of possible applications,
  • Universal use in modern industrial fields – they are used in computer drives, brushless drives, medical equipment, as well as technologically advanced constructions.
  • Thanks to efficiency per cm³, small magnets offer high operating force, in miniature format,

Characteristics of disadvantages of neodymium magnets and ways of using them

  • They are fragile upon too strong impacts. To avoid cracks, it is worth protecting magnets using a steel holder. Such protection not only protects the magnet but also increases its resistance to damage
  • Neodymium magnets lose strength when exposed to high temperatures. After reaching 80°C, many of them experience permanent drop of strength (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 advise using waterproof magnets made of rubber, plastic or other material immune to moisture, when using outdoors
  • Due to limitations in producing nuts and complex forms in magnets, we recommend using a housing - magnetic holder.
  • Possible danger resulting from small fragments of magnets can be dangerous, if swallowed, which is particularly important in the context of child safety. Furthermore, small elements of these products are able to be problematic in diagnostics medical when they are in 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

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

The specified lifting capacity refers to the maximum value, recorded under laboratory conditions, meaning:

  • with the contact of a sheet made of low-carbon steel, guaranteeing maximum field concentration
  • whose transverse dimension equals approx. 10 mm
  • characterized by smoothness
  • with direct contact (without paint)
  • for force applied at a right angle (pull-off, not shear)
  • at ambient temperature room level

Lifting capacity in real conditions – factors

Bear in mind that the magnet holding will differ depending on the following factors, starting with the most relevant:

  • Gap (between the magnet and the metal), as even a tiny clearance (e.g. 0.5 mm) leads to a drastic drop in force by up to 50% (this also applies to varnish, rust or dirt).
  • Force direction – remember that the magnet holds strongest perpendicularly. Under shear forces, the holding force drops drastically, often to levels of 20-30% of the maximum value.
  • Base massiveness – too thin sheet causes magnetic saturation, causing part of the power to be escaped to the other side.
  • Steel grade – ideal substrate is high-permeability steel. Hardened steels may generate lower lifting capacity.
  • Surface condition – ground elements ensure maximum contact, which improves force. Rough surfaces weaken the grip.
  • Temperature – temperature increase results in weakening of induction. Check the maximum operating temperature for a given model.

* Holding force was checked on the plate surface of 20 mm thickness, when the force acted perpendicularly, however under attempts to slide the magnet the lifting capacity is smaller. In addition, even a small distance {between} the magnet’s surface and the plate decreases the holding force.

Warnings

Product not for children

Absolutely keep magnets out of reach of children. Ingestion danger is significant, and the effects of magnets connecting inside the body are very dangerous.

Maximum temperature

Regular neodymium magnets (N-type) undergo demagnetization when the temperature goes above 80°C. The loss of strength is permanent.

Implant safety

Medical warning: Strong magnets can turn off pacemakers and defibrillators. Stay away if you have medical devices.

Precision electronics

A strong magnetic field interferes with the operation of compasses in smartphones and GPS navigation. Keep magnets near a smartphone to avoid damaging the sensors.

Magnetic media

Very strong magnetic fields can corrupt files on credit cards, hard drives, and other magnetic media. Maintain a gap of at least 10 cm.

Serious injuries

Watch your fingers. Two powerful magnets will snap together immediately with a force of massive weight, destroying anything in their path. Be careful!

Respect the power

Use magnets consciously. Their powerful strength can surprise even experienced users. Stay alert and respect their force.

Machining danger

Dust produced during machining of magnets is combustible. Do not drill into magnets unless you are an expert.

Beware of splinters

Despite metallic appearance, the material is brittle and not impact-resistant. Avoid impacts, as the magnet may crumble into hazardous fragments.

Metal Allergy

Studies show that nickel (the usual finish) is a common allergen. If you have an allergy, avoid touching magnets with bare hands and choose coated magnets.

Safety First!

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