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MW 5x30 / N38 - cylindrical magnet

cylindrical magnet

Catalog no 010088

GTIN/EAN: 5906301810872

5.00

Diameter Ø

5 mm [±0,1 mm]

Height

30 mm [±0,1 mm]

Weight

4.42 g

Magnetization Direction

↑ axial

Load capacity

0.45 kg / 4.40 N

Magnetic Induction

616.32 mT / 6163 Gs

Coating

[NiCuNi] Nickel

3.57 with VAT / pcs + price for transport

2.90 ZŁ net + 23% VAT / pcs

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Product card - MW 5x30 / N38 - cylindrical magnet

Specification / characteristics - MW 5x30 / N38 - cylindrical magnet

properties
properties values
Cat. no. 010088
GTIN/EAN 5906301810872
Production/Distribution Dhit sp. z o.o.
ul. Zielona 14 05-850 Ożarów Mazowiecki PL
Country of origin Poland / China / Germany
Customs code 85059029
Diameter Ø 5 mm [±0,1 mm]
Height 30 mm [±0,1 mm]
Weight 4.42 g
Magnetization Direction ↑ axial
Load capacity ~ ? 0.45 kg / 4.40 N
Magnetic Induction ~ ? 616.32 mT / 6163 Gs
Coating [NiCuNi] Nickel
Manufacturing Tolerance ±0.1 mm

Magnetic properties of material N38

Specification / characteristics MW 5x30 / N38 - cylindrical magnet
properties values units
remenance Br [min. - max.] ? 12.2-12.6 kGs
remenance Br [min. - max.] ? 1220-1260 mT
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

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 10-6 °C-1
Thermal expansion perpendicular (⊥) to orientation (M) -(1-3) x 10-6 °C-1
Young's modulus 1.7 x 104 kg/mm²

Engineering simulation of the assembly - report

These information constitute the direct effect of a physical simulation. Values rely on algorithms for the class Nd2Fe14B. Real-world performance may differ. Please consider these data as a supplementary guide when designing systems.

Table 1: Static force (force vs gap) - power drop
MW 5x30 / N38

Distance (mm) Induction (Gauss) / mT Pull Force (kg/lbs/g/N) Risk Status
0 mm 6154 Gs
615.4 mT
0.45 kg / 0.99 pounds
450.0 g / 4.4 N
weak grip
1 mm 3877 Gs
387.7 mT
0.18 kg / 0.39 pounds
178.6 g / 1.8 N
weak grip
2 mm 2308 Gs
230.8 mT
0.06 kg / 0.14 pounds
63.3 g / 0.6 N
weak grip
3 mm 1419 Gs
141.9 mT
0.02 kg / 0.05 pounds
23.9 g / 0.2 N
weak grip
5 mm 639 Gs
63.9 mT
0.00 kg / 0.01 pounds
4.8 g / 0.0 N
weak grip
10 mm 173 Gs
17.3 mT
0.00 kg / 0.00 pounds
0.4 g / 0.0 N
weak grip
15 mm 75 Gs
7.5 mT
0.00 kg / 0.00 pounds
0.1 g / 0.0 N
weak grip
20 mm 40 Gs
4.0 mT
0.00 kg / 0.00 pounds
0.0 g / 0.0 N
weak grip
30 mm 16 Gs
1.6 mT
0.00 kg / 0.00 pounds
0.0 g / 0.0 N
weak grip
50 mm 5 Gs
0.5 mT
0.00 kg / 0.00 pounds
0.0 g / 0.0 N
weak grip

Table 2: Sliding capacity (wall)
MW 5x30 / N38

Distance (mm) Friction coefficient Pull Force (kg/lbs/g/N)
0 mm Stal (~0.2) 0.09 kg / 0.20 pounds
90.0 g / 0.9 N
1 mm Stal (~0.2) 0.04 kg / 0.08 pounds
36.0 g / 0.4 N
2 mm Stal (~0.2) 0.01 kg / 0.03 pounds
12.0 g / 0.1 N
3 mm Stal (~0.2) 0.00 kg / 0.01 pounds
4.0 g / 0.0 N
5 mm Stal (~0.2) 0.00 kg / 0.00 pounds
0.0 g / 0.0 N
10 mm Stal (~0.2) 0.00 kg / 0.00 pounds
0.0 g / 0.0 N
15 mm Stal (~0.2) 0.00 kg / 0.00 pounds
0.0 g / 0.0 N
20 mm Stal (~0.2) 0.00 kg / 0.00 pounds
0.0 g / 0.0 N
30 mm Stal (~0.2) 0.00 kg / 0.00 pounds
0.0 g / 0.0 N
50 mm Stal (~0.2) 0.00 kg / 0.00 pounds
0.0 g / 0.0 N

Table 3: Wall mounting (shearing) - behavior on slippery surfaces
MW 5x30 / N38

Surface type Friction coefficient / % Mocy Max load (kg/lbs/g/N)
Raw steel
µ = 0.3 30% Nominalnej Siły
0.14 kg / 0.30 pounds
135.0 g / 1.3 N
Painted steel (standard)
µ = 0.2 20% Nominalnej Siły
0.09 kg / 0.20 pounds
90.0 g / 0.9 N
Oily/slippery steel
µ = 0.1 10% Nominalnej Siły
0.05 kg / 0.10 pounds
45.0 g / 0.4 N
Magnet with anti-slip rubber
µ = 0.5 50% Nominalnej Siły
0.23 kg / 0.50 pounds
225.0 g / 2.2 N

Table 4: Steel thickness (substrate influence) - sheet metal selection
MW 5x30 / N38

Steel thickness (mm) % power Real pull force (kg/lbs/g/N)
0.5 mm
10%
0.05 kg / 0.10 pounds
45.0 g / 0.4 N
1 mm
25%
0.11 kg / 0.25 pounds
112.5 g / 1.1 N
2 mm
50%
0.23 kg / 0.50 pounds
225.0 g / 2.2 N
3 mm
75%
0.34 kg / 0.74 pounds
337.5 g / 3.3 N
5 mm
100%
0.45 kg / 0.99 pounds
450.0 g / 4.4 N
10 mm
100%
0.45 kg / 0.99 pounds
450.0 g / 4.4 N
11 mm
100%
0.45 kg / 0.99 pounds
450.0 g / 4.4 N
12 mm
100%
0.45 kg / 0.99 pounds
450.0 g / 4.4 N

Table 5: Thermal resistance (stability) - resistance threshold
MW 5x30 / N38

Ambient temp. (°C) Power loss Remaining pull (kg/lbs/g/N) Status
20 °C 0.0% 0.45 kg / 0.99 pounds
450.0 g / 4.4 N
OK
40 °C -2.2% 0.44 kg / 0.97 pounds
440.1 g / 4.3 N
OK
60 °C -4.4% 0.43 kg / 0.95 pounds
430.2 g / 4.2 N
OK
80 °C -6.6% 0.42 kg / 0.93 pounds
420.3 g / 4.1 N
100 °C -28.8% 0.32 kg / 0.71 pounds
320.4 g / 3.1 N

Table 6: Magnet-Magnet interaction (attraction) - field collision
MW 5x30 / N38

Gap (mm) Attraction (kg/lbs) (N-S) Shear Force (kg/lbs/g/N) Repulsion (kg/lbs) (N-N)
0 mm 4.58 kg / 10.11 pounds
6 170 Gs
0.69 kg / 1.52 pounds
688 g / 6.7 N
N/A
1 mm 2.98 kg / 6.57 pounds
9 927 Gs
0.45 kg / 0.99 pounds
447 g / 4.4 N
2.68 kg / 5.92 pounds
~0 Gs
2 mm 1.82 kg / 4.01 pounds
7 755 Gs
0.27 kg / 0.60 pounds
273 g / 2.7 N
1.64 kg / 3.61 pounds
~0 Gs
3 mm 1.08 kg / 2.39 pounds
5 981 Gs
0.16 kg / 0.36 pounds
162 g / 1.6 N
0.97 kg / 2.15 pounds
~0 Gs
5 mm 0.39 kg / 0.86 pounds
3 595 Gs
0.06 kg / 0.13 pounds
59 g / 0.6 N
0.35 kg / 0.78 pounds
~0 Gs
10 mm 0.05 kg / 0.11 pounds
1 278 Gs
0.01 kg / 0.02 pounds
7 g / 0.1 N
0.04 kg / 0.10 pounds
~0 Gs
20 mm 0.00 kg / 0.01 pounds
346 Gs
0.00 kg / 0.00 pounds
1 g / 0.0 N
0.00 kg / 0.00 pounds
~0 Gs
50 mm 0.00 kg / 0.00 pounds
49 Gs
0.00 kg / 0.00 pounds
0 g / 0.0 N
0.00 kg / 0.00 pounds
~0 Gs
60 mm 0.00 kg / 0.00 pounds
32 Gs
0.00 kg / 0.00 pounds
0 g / 0.0 N
0.00 kg / 0.00 pounds
~0 Gs
70 mm 0.00 kg / 0.00 pounds
22 Gs
0.00 kg / 0.00 pounds
0 g / 0.0 N
0.00 kg / 0.00 pounds
~0 Gs
80 mm 0.00 kg / 0.00 pounds
16 Gs
0.00 kg / 0.00 pounds
0 g / 0.0 N
0.00 kg / 0.00 pounds
~0 Gs
90 mm 0.00 kg / 0.00 pounds
12 Gs
0.00 kg / 0.00 pounds
0 g / 0.0 N
0.00 kg / 0.00 pounds
~0 Gs
100 mm 0.00 kg / 0.00 pounds
9 Gs
0.00 kg / 0.00 pounds
0 g / 0.0 N
0.00 kg / 0.00 pounds
~0 Gs

Table 7: Safety (HSE) (implants) - precautionary measures
MW 5x30 / N38

Object / Device Limit (Gauss) / mT Safe distance
Pacemaker 5 Gs (0.5 mT) 5.0 cm
Hearing aid 10 Gs (1.0 mT) 4.0 cm
Timepiece 20 Gs (2.0 mT) 3.0 cm
Mobile device 40 Gs (4.0 mT) 2.5 cm
Remote 50 Gs (5.0 mT) 2.0 cm
Payment card 400 Gs (40.0 mT) 1.0 cm
HDD hard drive 600 Gs (60.0 mT) 1.0 cm

Table 8: Collisions (kinetic energy) - warning
MW 5x30 / N38

Start from (mm) Speed (km/h) Energy (J) Predicted outcome
10 mm 10.18 km/h
(2.83 m/s)
0.02 J
30 mm 17.63 km/h
(4.90 m/s)
0.05 J
50 mm 22.75 km/h
(6.32 m/s)
0.09 J
100 mm 32.18 km/h
(8.94 m/s)
0.18 J

Table 9: Anti-corrosion coating durability
MW 5x30 / N38

Technical parameter Value / Description
Coating type [NiCuNi] Nickel
Layer structure Nickel - Copper - Nickel
Layer thickness 10-20 µm
Salt spray test (SST) ? 24 h
Recommended environment Indoors only (dry)

Table 10: Electrical data (Pc)
MW 5x30 / N38

Parameter Value SI Unit / Description
Magnetic Flux 1 468 Mx 14.7 µWb
Pc Coefficient 1.59 High (Stable)

Table 11: Hydrostatics and buoyancy
MW 5x30 / N38

Environment Effective steel pull Effect
Air (land) 0.45 kg Standard
Water (riverbed) 0.52 kg
(+0.07 kg buoyancy gain)
+14.5%
Rust risk: This magnet has a standard nickel coating. After use in water, it must be dried and maintained immediately, otherwise it will rust!
1. Sliding resistance

*Caution: On a vertical surface, the magnet holds merely a fraction of its perpendicular strength.

2. Steel saturation

*Thin metal sheet (e.g. computer case) significantly limits the holding force.

3. Power loss vs temp

*For standard magnets, the safety limit is 80°C.

4. Demagnetization curve and operating point (B-H)

chart generated for the permeance coefficient Pc (Permeance Coefficient) = 1.59

This simulation demonstrates the magnetic stability of the selected magnet under specific geometric conditions. The solid red line represents the demagnetization curve (material potential), while the dashed blue line is the load line based on the magnet's geometry. The Pc (Permeance Coefficient), also known as the load line slope, is a dimensionless value that describes the relationship between the magnet's shape and its magnetic stability. The intersection of these two lines (the black dot) is the operating point — it determines the actual magnetic flux density generated by the magnet in this specific configuration. A higher Pc value means the magnet is more 'slender' (tall relative to its area), resulting in a higher operating point and better resistance to irreversible demagnetization caused by external fields or temperature. A value of 0.42 is relatively low (typical for flat magnets), meaning the operating point is closer to the 'knee' of the curve — caution is advised when operating at temperatures near the maximum limit to avoid strength loss.

Technical specification and ecology
Material specification
iron (Fe) 64% – 68%
neodymium (Nd) 29% – 32%
boron (B) 1.1% – 1.2%
dysprosium (Dy) 0.5% – 2.0%
coating (Ni-Cu-Ni) < 0.05%
Sustainability
recyclability (EoL) 100%
recycled raw materials ~10% (pre-cons)
carbon footprint low / zredukowany
waste code (EWC) 16 02 16
Safety card (GPSR)
responsible entity
Dhit sp. z o.o.
ul. Kościuszki 6A, 05-850 Ożarów Mazowiecki
tel: +48 22 499 98 98 | e-mail: bok@dhit.pl
batch number/type
id: 010088-2026
Quick Unit Converter
Pulling force

Magnetic Field

Other offers

This product is an exceptionally strong rod magnet, made from modern NdFeB material, which, at dimensions of Ø5x30 mm, guarantees optimal power. The MW 5x30 / N38 model is characterized by an accuracy of ±0.1mm and industrial build quality, making it a perfect solution for professional engineers and designers. As a cylindrical magnet with significant force (approx. 0.45 kg), this product is available off-the-shelf from our European logistics center, ensuring lightning-fast order fulfillment. Furthermore, its triple-layer Ni-Cu-Ni coating effectively protects it against corrosion in typical operating conditions, guaranteeing an aesthetic appearance and durability for years.
It finds application in DIY projects, advanced robotics, and broadly understood industry, serving as a fastening or actuating element. Thanks to the pull force of 4.40 N with a weight of only 4.42 g, this rod is indispensable in electronics and wherever low weight is crucial.
Due to the delicate structure of the ceramic sinter, you must not use force-fitting (so-called press-fit), as this risks chipping the coating of this precision component. To ensure long-term durability in industry, anaerobic resins are used, which are safe for nickel and fill the gap, guaranteeing high repeatability of the connection.
Grade N38 is the most frequently chosen standard for professional neodymium magnets, offering an optimal price-to-power ratio and high resistance to demagnetization. If you need even stronger magnets in the same volume (Ø5x30), contact us regarding higher grades (e.g., N50, N52), however, N38 is the standard in continuous sale in our warehouse.
The presented product is a neodymium magnet with precisely defined parameters: diameter 5 mm and height 30 mm. The value of 4.40 N means that the magnet is capable of holding a weight many times exceeding its own mass of 4.42 g. The product has a [NiCuNi] coating, which protects the surface against oxidation, giving it an aesthetic, silvery shine.
This cylinder is magnetized axially (along the height of 30 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 diametrically if your project requires it.

Advantages and disadvantages of neodymium magnets.

Advantages

Besides their stability, neodymium magnets are valued for these benefits:
  • They virtually do not lose strength, because even after 10 years the performance loss is only ~1% (according to literature),
  • Neodymium magnets prove to be highly resistant to loss of magnetic properties caused by magnetic disturbances,
  • Thanks to the shimmering finish, the layer of Ni-Cu-Ni, gold-plated, or silver-plated gives an clean appearance,
  • The surface of neodymium magnets generates a strong magnetic field – this is a distinguishing feature,
  • Neodymium magnets are characterized by very high magnetic induction on the magnet surface and can function (depending on the shape) even at a temperature of 230°C or more...
  • Thanks to versatility in constructing and the ability to customize to complex applications,
  • Universal use in high-tech industry – they serve a role in hard drives, electric motors, diagnostic systems, and multitasking production systems.
  • Relatively small size with high pulling force – neodymium magnets offer impressive pulling force in tiny dimensions, which allows their use in miniature devices

Cons

Disadvantages of NdFeB magnets:
  • At strong impacts they can break, therefore we recommend placing them in steel cases. A metal housing provides additional protection against damage and increases the magnet's durability.
  • Neodymium magnets lose their force under the influence of heating. As soon as 80°C is exceeded, many of them start losing their power. Therefore, we recommend our special magnets marked [AH], which maintain durability even at temperatures up to 230°C
  • Magnets exposed to a humid environment can rust. Therefore while using outdoors, we advise using waterproof magnets made of rubber, plastic or other material resistant to moisture
  • We recommend a housing - magnetic mount, due to difficulties in realizing nuts inside the magnet and complicated shapes.
  • Possible danger resulting from small fragments of magnets can be dangerous, when accidentally swallowed, which is particularly important in the aspect of protecting the youngest. Additionally, small elements of these magnets are able to disrupt the diagnostic process medical after entering the body.
  • With large orders the cost of neodymium magnets is economically unviable,

Lifting parameters

Maximum magnetic pulling forcewhat contributes to it?

Magnet power is the result of a measurement for the most favorable conditions, including:
  • using a base made of high-permeability steel, functioning as a magnetic yoke
  • with a thickness of at least 10 mm
  • characterized by even structure
  • without any insulating layer between the magnet and steel
  • under perpendicular force direction (90-degree angle)
  • at standard ambient temperature

Lifting capacity in real conditions – factors

It is worth knowing that the magnet holding will differ depending on elements below, in order of importance:
  • Air gap (between the magnet and the plate), as even a tiny distance (e.g. 0.5 mm) can cause a reduction in lifting capacity by up to 50% (this also applies to paint, rust or dirt).
  • Force direction – declared lifting capacity refers to detachment vertically. When attempting to slide, the magnet exhibits significantly lower power (often approx. 20-30% of nominal force).
  • Wall thickness – the thinner the sheet, the weaker the hold. Magnetic flux penetrates through instead of converting into lifting capacity.
  • Material type – the best choice is high-permeability steel. Cast iron may generate lower lifting capacity.
  • Base smoothness – the smoother and more polished the surface, the larger the contact zone and stronger the hold. Unevenness creates an air distance.
  • Thermal factor – high temperature weakens magnetic field. Too high temperature can permanently demagnetize the magnet.

Holding force was measured on the plate surface of 20 mm thickness, when the force acted perpendicularly, whereas under shearing force the load capacity is reduced by as much as 5 times. Moreover, even a minimal clearance between the magnet’s surface and the plate lowers the load capacity.

Warnings
Precision electronics

A powerful magnetic field disrupts the functioning of magnetometers in phones and GPS navigation. Keep magnets near a device to avoid damaging the sensors.

Medical interference

For implant holders: Powerful magnets affect electronics. Maintain minimum 30 cm distance or request help to work with the magnets.

Protective goggles

Watch out for shards. Magnets can explode upon violent connection, launching sharp fragments into the air. We recommend safety glasses.

Electronic devices

Do not bring magnets near a purse, computer, or TV. The magnetism can destroy these devices and wipe information from cards.

Adults only

Always keep magnets out of reach of children. Choking hazard is significant, and the effects of magnets connecting inside the body are very dangerous.

Metal Allergy

Allergy Notice: The nickel-copper-nickel coating consists of nickel. If an allergic reaction happens, cease handling magnets and wear gloves.

Permanent damage

Watch the temperature. Heating the magnet above 80 degrees Celsius will destroy its properties and pulling force.

Fire warning

Mechanical processing of NdFeB material poses a fire risk. Magnetic powder oxidizes rapidly with oxygen and is difficult to extinguish.

Respect the power

Use magnets consciously. Their huge power can shock even experienced users. Be vigilant and respect their force.

Pinching danger

Big blocks can crush fingers in a fraction of a second. Under no circumstances put your hand betwixt two strong magnets.

Important! Details about hazards in the article: Magnet Safety Guide.
Dhit sp. z o.o.

e-mail: bok@dhit.pl

tel: +48 888 99 98 98