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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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Physical properties - 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

Physical modeling of the product - technical parameters

Presented values are the direct effect of a engineering simulation. Values rely on models for the material Nd2Fe14B. Operational performance may differ from theoretical values. Treat these calculations as a supplementary guide for designers.

Table 1: Static pull force (force vs gap) - characteristics
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 LBS
450.0 g / 4.4 N
weak grip
1 mm 3877 Gs
387.7 mT
0.18 kg / 0.39 LBS
178.6 g / 1.8 N
weak grip
2 mm 2308 Gs
230.8 mT
0.06 kg / 0.14 LBS
63.3 g / 0.6 N
weak grip
3 mm 1419 Gs
141.9 mT
0.02 kg / 0.05 LBS
23.9 g / 0.2 N
weak grip
5 mm 639 Gs
63.9 mT
0.00 kg / 0.01 LBS
4.8 g / 0.0 N
weak grip
10 mm 173 Gs
17.3 mT
0.00 kg / 0.00 LBS
0.4 g / 0.0 N
weak grip
15 mm 75 Gs
7.5 mT
0.00 kg / 0.00 LBS
0.1 g / 0.0 N
weak grip
20 mm 40 Gs
4.0 mT
0.00 kg / 0.00 LBS
0.0 g / 0.0 N
weak grip
30 mm 16 Gs
1.6 mT
0.00 kg / 0.00 LBS
0.0 g / 0.0 N
weak grip
50 mm 5 Gs
0.5 mT
0.00 kg / 0.00 LBS
0.0 g / 0.0 N
weak grip

Table 2: Slippage force (vertical surface)
MW 5x30 / N38

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

Table 3: Wall mounting (sliding) - 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 LBS
135.0 g / 1.3 N
Painted steel (standard)
µ = 0.2 20% Nominalnej Siły
0.09 kg / 0.20 LBS
90.0 g / 0.9 N
Oily/slippery steel
µ = 0.1 10% Nominalnej Siły
0.05 kg / 0.10 LBS
45.0 g / 0.4 N
Magnet with anti-slip rubber
µ = 0.5 50% Nominalnej Siły
0.23 kg / 0.50 LBS
225.0 g / 2.2 N

Table 4: Material efficiency (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 LBS
45.0 g / 0.4 N
1 mm
25%
0.11 kg / 0.25 LBS
112.5 g / 1.1 N
2 mm
50%
0.23 kg / 0.50 LBS
225.0 g / 2.2 N
3 mm
75%
0.34 kg / 0.74 LBS
337.5 g / 3.3 N
5 mm
100%
0.45 kg / 0.99 LBS
450.0 g / 4.4 N
10 mm
100%
0.45 kg / 0.99 LBS
450.0 g / 4.4 N
11 mm
100%
0.45 kg / 0.99 LBS
450.0 g / 4.4 N
12 mm
100%
0.45 kg / 0.99 LBS
450.0 g / 4.4 N

Table 5: Working in heat (stability) - power drop
MW 5x30 / N38

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

Table 6: Two magnets (attraction) - forces in the system
MW 5x30 / N38

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

Table 7: Safety (HSE) (electronics) - 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
Phone / Smartphone 40 Gs (4.0 mT) 2.5 cm
Car key 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: Impact energy (kinetic energy) - collision effects
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: Construction 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%
Corrosion warning: This magnet has a standard nickel coating. After use in water, it must be dried and maintained immediately, otherwise it will rust!
1. Shear force

*Note: On a vertical surface, the magnet holds just a fraction of its nominal pull.

2. Steel saturation

*Thin metal sheet (e.g. 0.5mm PC case) drastically limits the holding force.

3. Thermal stability

*For N38 material, the max working temp 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 and environmental data
Chemical composition
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%
Environmental data
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
Magnet Unit Converter
Pulling force

Magnetic Induction

Other products

The presented product is an extremely powerful cylindrical magnet, made from advanced NdFeB material, which, at dimensions of Ø5x30 mm, guarantees maximum efficiency. The MW 5x30 / N38 component boasts high dimensional repeatability and professional build quality, making it an ideal solution for the most demanding engineers and designers. As a magnetic rod with impressive force (approx. 0.45 kg), this product is in stock from our European logistics center, ensuring quick order fulfillment. Moreover, its triple-layer Ni-Cu-Ni coating effectively protects it against corrosion in typical operating conditions, ensuring an aesthetic appearance and durability for years.
This model is ideal for building generators, advanced sensors, and efficient filters, where maximum induction on a small surface counts. Thanks to the high power of 4.40 N with a weight of only 4.42 g, this rod is indispensable in miniature devices and wherever every gram matters.
Due to the delicate structure of the ceramic sinter, you must not use force-fitting (so-called press-fit), as this risks immediate cracking of this precision component. To ensure stability in automation, anaerobic resins are used, which do not react with the nickel coating and fill the gap, guaranteeing durability of the connection.
Magnets N38 are strong enough for 90% of applications in automation and machine building, where excessive miniaturization with maximum force is not required. 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 available off-the-shelf in our store.
The presented product is a neodymium magnet with precisely defined parameters: diameter 5 mm and height 30 mm. The key parameter here is the lifting capacity amounting to approximately 0.45 kg (force ~4.40 N), which, with such defined dimensions, proves the high grade 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 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 through the diameter if your project requires it.

Advantages and disadvantages of Nd2Fe14B magnets.

Pros

Besides their durability, neodymium magnets are valued for these benefits:
  • They retain full power for around ten years – the drop is just ~1% (according to analyses),
  • They are resistant to demagnetization induced by external disturbances,
  • Thanks to the shiny finish, the layer of nickel, gold-plated, or silver gives an elegant appearance,
  • The surface of neodymium magnets generates a unique magnetic field – this is one of their assets,
  • 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...
  • Thanks to the possibility of accurate forming and adaptation to unique projects, neodymium magnets can be modeled in a variety of geometric configurations, which makes them more universal,
  • Versatile presence in advanced technology sectors – they find application in mass storage devices, brushless drives, precision medical tools, as well as industrial machines.
  • Thanks to their power density, small magnets offer high operating force, in miniature format,

Cons

What to avoid - cons of neodymium magnets: application proposals
  • Brittleness is one of their disadvantages. Upon strong impact they can fracture. We advise keeping them in a strong case, which not only secures them against impacts but also increases their durability
  • When exposed to high temperature, neodymium magnets suffer a drop in power. Often, when the temperature exceeds 80°C, their power decreases (depending on the size, as well as shape of the magnet). For those who need magnets for extreme conditions, we offer [AH] versions withstanding up to 230°C
  • They oxidize in a humid environment - during use outdoors we advise using waterproof magnets e.g. in rubber, plastic
  • Due to limitations in realizing threads and complicated shapes in magnets, we propose using a housing - magnetic holder.
  • Health risk to health – tiny shards of magnets can be dangerous, when accidentally swallowed, which becomes key in the context of child safety. It is also worth noting that small elements of these magnets are able to disrupt the diagnostic process medical when they are in the body.
  • With mass production the cost of neodymium magnets can be a barrier,

Lifting parameters

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

The specified lifting capacity represents the maximum value, obtained under laboratory conditions, specifically:
  • with the contact of a yoke made of low-carbon steel, ensuring maximum field concentration
  • whose transverse dimension is min. 10 mm
  • with an polished contact surface
  • under conditions of no distance (surface-to-surface)
  • under perpendicular application of breakaway force (90-degree angle)
  • at room temperature

Lifting capacity in real conditions – factors

Real force is affected by working environment parameters, such as (from priority):
  • Space between magnet and steel – even a fraction of a millimeter of distance (caused e.g. by veneer or dirt) significantly weakens the magnet efficiency, often by half at just 0.5 mm.
  • Loading method – declared lifting capacity refers to detachment vertically. When slipping, the magnet exhibits much less (typically approx. 20-30% of maximum force).
  • Substrate thickness – for full efficiency, the steel must be sufficiently thick. Paper-thin metal restricts the attraction force (the magnet "punches through" it).
  • Material type – ideal substrate is pure iron steel. Cast iron may attract less.
  • Surface finish – full contact is possible only on polished steel. Any scratches and bumps reduce the real contact area, reducing force.
  • Temperature – heating the magnet causes a temporary drop of force. Check the maximum operating temperature for a given model.

Lifting capacity testing was carried out on a smooth plate of suitable thickness, under perpendicular forces, in contrast under attempts to slide the magnet the lifting capacity is smaller. Moreover, even a minimal clearance between the magnet and the plate lowers the lifting capacity.

Precautions when working with NdFeB magnets
Permanent damage

Regular neodymium magnets (grade N) lose power when the temperature surpasses 80°C. Damage is permanent.

Flammability

Combustion risk: Neodymium dust is highly flammable. Avoid machining magnets without safety gear as this risks ignition.

Threat to navigation

A powerful magnetic field interferes with the operation of magnetometers in smartphones and GPS navigation. Maintain magnets near a smartphone to avoid breaking the sensors.

Data carriers

Intense magnetic fields can corrupt files on credit cards, HDDs, and other magnetic media. Maintain a gap of min. 10 cm.

Magnet fragility

Despite metallic appearance, neodymium is brittle and not impact-resistant. Do not hit, as the magnet may crumble into sharp, dangerous pieces.

Handling guide

Handle with care. Rare earth magnets attract from a long distance and snap with huge force, often quicker than you can move away.

Health Danger

Individuals with a ICD should maintain an absolute distance from magnets. The magnetic field can disrupt the functioning of the implant.

Crushing force

Danger of trauma: The pulling power is so great that it can result in blood blisters, pinching, and broken bones. Use thick gloves.

Allergy Warning

Warning for allergy sufferers: The nickel-copper-nickel coating consists of nickel. If redness happens, immediately stop working with magnets and use protective gear.

This is not a toy

NdFeB magnets are not suitable for play. Swallowing multiple magnets may result in them attracting across intestines, which constitutes a critical condition and requires immediate surgery.

Danger! Details about risks in the article: Safety of working with magnets.