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Professional solutions for mounting without drilling. Threaded mounts (external or internal) provide instant organization of work on production halls. They are indispensable installing lighting, sensors and banners.

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MW 8x5 / N38 - cylindrical magnet

cylindrical magnet

Catalog no 010105

GTIN/EAN: 5906301811046

5.00

Diameter Ø

8 mm [±0,1 mm]

Height

5 mm [±0,1 mm]

Weight

1.88 g

Magnetization Direction

↑ axial

Load capacity

2.17 kg / 21.31 N

Magnetic Induction

483.41 mT / 4834 Gs

Coating

[NiCuNi] Nickel

0.836 with VAT / pcs + price for transport

0.680 ZŁ net + 23% VAT / pcs

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Technical - MW 8x5 / N38 - cylindrical magnet

Specification / characteristics - MW 8x5 / N38 - cylindrical magnet

properties
properties values
Cat. no. 010105
GTIN/EAN 5906301811046
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 8 mm [±0,1 mm]
Height 5 mm [±0,1 mm]
Weight 1.88 g
Magnetization Direction ↑ axial
Load capacity ~ ? 2.17 kg / 21.31 N
Magnetic Induction ~ ? 483.41 mT / 4834 Gs
Coating [NiCuNi] Nickel
Manufacturing Tolerance ±0.1 mm

Magnetic properties of material N38

Specification / characteristics MW 8x5 / 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 assembly - data

The following data are the outcome of a engineering analysis. Results were calculated on models for the material Nd2Fe14B. Real-world performance might slightly differ. Treat these data as a preliminary roadmap for designers.

Table 1: Static pull force (force vs gap) - interaction chart
MW 8x5 / N38

Distance (mm) Induction (Gauss) / mT Pull Force (kg/lbs/g/N) Risk Status
0 mm 4830 Gs
483.0 mT
2.17 kg / 4.78 LBS
2170.0 g / 21.3 N
medium risk
1 mm 3655 Gs
365.5 mT
1.24 kg / 2.74 LBS
1242.8 g / 12.2 N
weak grip
2 mm 2610 Gs
261.0 mT
0.63 kg / 1.40 LBS
633.9 g / 6.2 N
weak grip
3 mm 1825 Gs
182.5 mT
0.31 kg / 0.68 LBS
310.0 g / 3.0 N
weak grip
5 mm 915 Gs
91.5 mT
0.08 kg / 0.17 LBS
77.9 g / 0.8 N
weak grip
10 mm 234 Gs
23.4 mT
0.01 kg / 0.01 LBS
5.1 g / 0.1 N
weak grip
15 mm 89 Gs
8.9 mT
0.00 kg / 0.00 LBS
0.7 g / 0.0 N
weak grip
20 mm 43 Gs
4.3 mT
0.00 kg / 0.00 LBS
0.2 g / 0.0 N
weak grip
30 mm 14 Gs
1.4 mT
0.00 kg / 0.00 LBS
0.0 g / 0.0 N
weak grip
50 mm 3 Gs
0.3 mT
0.00 kg / 0.00 LBS
0.0 g / 0.0 N
weak grip

Table 2: Sliding force (vertical surface)
MW 8x5 / N38

Distance (mm) Friction coefficient Pull Force (kg/lbs/g/N)
0 mm Stal (~0.2) 0.43 kg / 0.96 LBS
434.0 g / 4.3 N
1 mm Stal (~0.2) 0.25 kg / 0.55 LBS
248.0 g / 2.4 N
2 mm Stal (~0.2) 0.13 kg / 0.28 LBS
126.0 g / 1.2 N
3 mm Stal (~0.2) 0.06 kg / 0.14 LBS
62.0 g / 0.6 N
5 mm Stal (~0.2) 0.02 kg / 0.04 LBS
16.0 g / 0.2 N
10 mm Stal (~0.2) 0.00 kg / 0.00 LBS
2.0 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 (shearing) - vertical pull
MW 8x5 / N38

Surface type Friction coefficient / % Mocy Max load (kg/lbs/g/N)
Raw steel
µ = 0.3 30% Nominalnej Siły
0.65 kg / 1.44 LBS
651.0 g / 6.4 N
Painted steel (standard)
µ = 0.2 20% Nominalnej Siły
0.43 kg / 0.96 LBS
434.0 g / 4.3 N
Oily/slippery steel
µ = 0.1 10% Nominalnej Siły
0.22 kg / 0.48 LBS
217.0 g / 2.1 N
Magnet with anti-slip rubber
µ = 0.5 50% Nominalnej Siły
1.09 kg / 2.39 LBS
1085.0 g / 10.6 N

Table 4: Steel thickness (substrate influence) - sheet metal selection
MW 8x5 / N38

Steel thickness (mm) % power Real pull force (kg/lbs/g/N)
0.5 mm
10%
0.22 kg / 0.48 LBS
217.0 g / 2.1 N
1 mm
25%
0.54 kg / 1.20 LBS
542.5 g / 5.3 N
2 mm
50%
1.09 kg / 2.39 LBS
1085.0 g / 10.6 N
3 mm
75%
1.63 kg / 3.59 LBS
1627.5 g / 16.0 N
5 mm
100%
2.17 kg / 4.78 LBS
2170.0 g / 21.3 N
10 mm
100%
2.17 kg / 4.78 LBS
2170.0 g / 21.3 N
11 mm
100%
2.17 kg / 4.78 LBS
2170.0 g / 21.3 N
12 mm
100%
2.17 kg / 4.78 LBS
2170.0 g / 21.3 N

Table 5: Thermal resistance (stability) - power drop
MW 8x5 / N38

Ambient temp. (°C) Power loss Remaining pull (kg/lbs/g/N) Status
20 °C 0.0% 2.17 kg / 4.78 LBS
2170.0 g / 21.3 N
OK
40 °C -2.2% 2.12 kg / 4.68 LBS
2122.3 g / 20.8 N
OK
60 °C -4.4% 2.07 kg / 4.57 LBS
2074.5 g / 20.4 N
OK
80 °C -6.6% 2.03 kg / 4.47 LBS
2026.8 g / 19.9 N
100 °C -28.8% 1.55 kg / 3.41 LBS
1545.0 g / 15.2 N

Table 6: Magnet-Magnet interaction (attraction) - forces in the system
MW 8x5 / N38

Gap (mm) Attraction (kg/lbs) (N-S) Shear Strength (kg/lbs/g/N) Repulsion (kg/lbs) (N-N)
0 mm 7.23 kg / 15.94 LBS
5 742 Gs
1.08 kg / 2.39 LBS
1084 g / 10.6 N
N/A
1 mm 5.58 kg / 12.31 LBS
8 490 Gs
0.84 kg / 1.85 LBS
838 g / 8.2 N
5.03 kg / 11.08 LBS
~0 Gs
2 mm 4.14 kg / 9.13 LBS
7 310 Gs
0.62 kg / 1.37 LBS
621 g / 6.1 N
3.73 kg / 8.21 LBS
~0 Gs
3 mm 2.98 kg / 6.58 LBS
6 207 Gs
0.45 kg / 0.99 LBS
448 g / 4.4 N
2.69 kg / 5.92 LBS
~0 Gs
5 mm 1.48 kg / 3.26 LBS
4 369 Gs
0.22 kg / 0.49 LBS
222 g / 2.2 N
1.33 kg / 2.93 LBS
~0 Gs
10 mm 0.26 kg / 0.57 LBS
1 830 Gs
0.04 kg / 0.09 LBS
39 g / 0.4 N
0.23 kg / 0.51 LBS
~0 Gs
20 mm 0.02 kg / 0.04 LBS
468 Gs
0.00 kg / 0.01 LBS
3 g / 0.0 N
0.02 kg / 0.03 LBS
~0 Gs
50 mm 0.00 kg / 0.00 LBS
47 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
29 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
19 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
13 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
9 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
7 Gs
0.00 kg / 0.00 LBS
0 g / 0.0 N
0.00 kg / 0.00 LBS
~0 Gs

Table 7: Protective zones (implants) - precautionary measures
MW 8x5 / N38

Object / Device Limit (Gauss) / mT Safe distance
Pacemaker 5 Gs (0.5 mT) 4.5 cm
Hearing aid 10 Gs (1.0 mT) 3.5 cm
Mechanical watch 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: Dynamics (kinetic energy) - warning
MW 8x5 / N38

Start from (mm) Speed (km/h) Energy (J) Predicted outcome
10 mm 34.31 km/h
(9.53 m/s)
0.09 J
30 mm 59.35 km/h
(16.49 m/s)
0.26 J
50 mm 76.62 km/h
(21.28 m/s)
0.43 J
100 mm 108.35 km/h
(30.10 m/s)
0.85 J

Table 9: Anti-corrosion coating durability
MW 8x5 / 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 (Flux)
MW 8x5 / N38

Parameter Value SI Unit / Description
Magnetic Flux 2 450 Mx 24.5 µWb
Pc Coefficient 0.68 High (Stable)

Table 11: Physics of underwater searching
MW 8x5 / N38

Environment Effective steel pull Effect
Air (land) 2.17 kg Standard
Water (riverbed) 2.48 kg
(+0.31 kg buoyancy gain)
+14.5%
Rust risk: Remember to wipe the magnet thoroughly after removing it from water and apply a protective layer (e.g., oil) to avoid corrosion.
1. Shear force

*Warning: On a vertical surface, the magnet retains just approx. 20-30% of its perpendicular strength.

2. Steel saturation

*Thin metal sheet (e.g. computer case) severely reduces the holding force.

3. Power loss vs temp

*For N38 grade, the max working temp is 80°C.

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

chart generated for the permeance coefficient Pc (Permeance Coefficient) = 0.68

The chart above illustrates the magnetic characteristics of the material within the second quadrant of the hysteresis loop. 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.

Engineering data and GPSR
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%
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: 010105-2025
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Force (pull)

Magnetic Induction

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The presented product is an exceptionally strong cylinder magnet, manufactured from advanced NdFeB material, which, at dimensions of Ø8x5 mm, guarantees maximum efficiency. This specific item boasts 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. 2.17 kg), this product is available off-the-shelf from our warehouse in Poland, ensuring lightning-fast order fulfillment. Moreover, its triple-layer Ni-Cu-Ni coating shields it against corrosion in standard operating conditions, ensuring 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 high power of 21.31 N with a weight of only 1.88 g, this rod is indispensable in miniature devices and wherever every gram matters.
Due to the brittleness of the NdFeB material, you must not use force-fitting (so-called press-fit), as this risks immediate cracking of this precision component. To ensure stability in automation, specialized industrial adhesives are used, which do not react with the nickel coating and fill the gap, guaranteeing durability of the connection.
Magnets N38 are suitable for the majority 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 (Ø8x5), contact us regarding higher grades (e.g., N50, N52), however, N38 is the standard in continuous sale in our warehouse.
This model is characterized by dimensions Ø8x5 mm, which, at a weight of 1.88 g, makes it an element with high magnetic energy density. The value of 21.31 N means that the magnet is capable of holding a weight many times exceeding its own mass of 1.88 g. The product has a [NiCuNi] coating, which protects the surface against oxidation, 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 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 diametrically if your project requires it.

Pros and cons of rare earth magnets.

Pros

Besides their exceptional field intensity, neodymium magnets offer the following advantages:
  • They retain attractive force for almost ten years – the loss is just ~1% (according to analyses),
  • Neodymium magnets are extremely resistant to demagnetization caused by external magnetic fields,
  • A magnet with a smooth gold surface is more attractive,
  • Magnetic induction on the working part of the magnet remains exceptional,
  • Thanks to resistance to high temperature, they are capable of working (depending on the shape) even at temperatures up to 230°C and higher...
  • Thanks to flexibility in constructing and the ability to customize to specific needs,
  • Universal use in advanced technology sectors – they are utilized in computer drives, brushless drives, precision medical tools, and multitasking production systems.
  • Thanks to concentrated force, small magnets offer high operating force, with minimal size,

Limitations

Cons of neodymium magnets: tips and applications.
  • At strong impacts they can crack, therefore we advise placing them in special holders. A metal housing provides additional protection against damage and increases the magnet's durability.
  • Neodymium magnets decrease their power under the influence of heating. As soon as 80°C is exceeded, many of them start losing their force. 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 when using outdoors, we advise using water-impermeable magnets made of rubber, plastic or other material resistant to moisture
  • Limited ability of making nuts in the magnet and complicated forms - recommended is cover - magnetic holder.
  • Possible danger related to microscopic parts of magnets pose a threat, when accidentally swallowed, which becomes key in the context of child safety. Furthermore, small elements of these products are able to complicate diagnosis medical when they are in the body.
  • High unit price – neodymium magnets are more expensive than other types of magnets (e.g. ferrite), which can limit application in large quantities

Holding force characteristics

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

The declared magnet strength represents the limit force, measured under ideal test conditions, meaning:
  • with the contact of a yoke made of low-carbon steel, ensuring maximum field concentration
  • whose transverse dimension reaches at least 10 mm
  • with an ideally smooth touching surface
  • with total lack of distance (no paint)
  • under vertical force direction (90-degree angle)
  • at ambient temperature room level

Determinants of practical lifting force of a magnet

It is worth knowing that the magnet holding may be lower depending on the following factors, starting with the most relevant:
  • Distance (between the magnet and the metal), since even a microscopic distance (e.g. 0.5 mm) leads to a decrease in lifting capacity by up to 50% (this also applies to varnish, rust or debris).
  • Load vector – highest force is reached only during perpendicular pulling. The resistance to sliding of the magnet along the plate is usually several times smaller (approx. 1/5 of the lifting capacity).
  • Substrate thickness – for full efficiency, the steel must be adequately massive. Thin sheet limits the lifting capacity (the magnet "punches through" it).
  • Material composition – different alloys reacts the same. Alloy additives worsen the attraction effect.
  • Surface condition – smooth surfaces guarantee perfect abutment, which increases field saturation. Rough surfaces reduce efficiency.
  • Operating temperature – NdFeB sinters have a sensitivity to temperature. When it is hot they lose power, and in frost gain strength (up to a certain limit).

Lifting capacity was determined using a smooth steel plate of suitable thickness (min. 20 mm), under vertically applied force, in contrast under attempts to slide the magnet the holding force is lower. Additionally, even a minimal clearance between the magnet’s surface and the plate decreases the holding force.

Warnings
Safe distance

Avoid bringing magnets near a purse, computer, or screen. The magnetism can permanently damage these devices and wipe information from cards.

Caution required

Before use, check safety instructions. Sudden snapping can break the magnet or injure your hand. Think ahead.

Avoid contact if allergic

Studies show that nickel (the usual finish) is a potent allergen. For allergy sufferers, avoid touching magnets with bare hands and choose versions in plastic housing.

Power loss in heat

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

Compass and GPS

Navigation devices and mobile phones are highly sensitive to magnetic fields. Direct contact with a powerful NdFeB magnet can decalibrate the internal compass in your phone.

Bodily injuries

Large magnets can crush fingers in a fraction of a second. Under no circumstances place your hand betwixt two strong magnets.

Swallowing risk

Absolutely keep magnets away from children. Ingestion danger is high, and the consequences of magnets connecting inside the body are tragic.

Dust is flammable

Powder generated during grinding of magnets is self-igniting. Avoid drilling into magnets without proper cooling and knowledge.

Shattering risk

Despite metallic appearance, neodymium is delicate and cannot withstand shocks. Do not hit, as the magnet may crumble into hazardous fragments.

ICD Warning

For implant holders: Strong magnetic fields affect electronics. Keep at least 30 cm distance or ask another person to handle the magnets.

Safety First! Want to know more? Read our article: Why are neodymium magnets dangerous?
Dhit sp. z o.o.

e-mail: bok@dhit.pl

tel: +48 888 99 98 98