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MW 8x1.5 / N38 - cylindrical magnet

cylindrical magnet

Catalog no 010101

GTIN/EAN: 5906301811008

5.00

Diameter Ø

8 mm [±0,1 mm]

Height

1.5 mm [±0,1 mm]

Weight

0.57 g

Magnetization Direction

↑ axial

Load capacity

0.74 kg / 7.27 N

Magnetic Induction

217.52 mT / 2175 Gs

Coating

[NiCuNi] Nickel

technical details »

0.455 ZŁ with VAT / pcs + price for transport

0.370 ZŁ net + 23% VAT / pcs

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Technical specification of the product - MW 8x1.5 / N38 - cylindrical magnet

Specification / characteristics - MW 8x1.5 / N38 - cylindrical magnet

properties
properties values
Cat. no. 010101
GTIN/EAN 5906301811008
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 1.5 mm [±0,1 mm]
Weight 0.57 g
Magnetization Direction ↑ axial
Load capacity ~ ? 0.74 kg / 7.27 N
Magnetic Induction ~ ? 217.52 mT / 2175 Gs
Coating [NiCuNi] Nickel
Manufacturing Tolerance ±0.1 mm

Magnetic properties of material N38

Specification / characteristics MW 8x1.5 / 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 analysis of the magnet - technical parameters

Presented information constitute the result of a mathematical analysis. Values were calculated on models for the material Nd2Fe14B. Real-world parameters might slightly differ from theoretical values. Please consider these calculations as a reference point when designing systems.

Table 1: Static pull force (pull vs distance) - interaction chart
MW 8x1.5 / N38

Distance (mm) Induction (Gauss) / mT Pull Force (kg/lbs/g/N) Risk Status
0 mm 2174 Gs
217.4 mT
 0.74 kg / 1.63 LBS
740.0 g / 7.3 N
 safe
1 mm 1782 Gs
178.2 mT
 0.50 kg / 1.10 LBS
497.3 g / 4.9 N
 safe
2 mm 1310 Gs
131.0 mT
 0.27 kg / 0.59 LBS
268.7 g / 2.6 N
 safe
3 mm 914 Gs
91.4 mT
 0.13 kg / 0.29 LBS
130.8 g / 1.3 N
 safe
5 mm 439 Gs
43.9 mT
 0.03 kg / 0.07 LBS
30.2 g / 0.3 N
 safe
10 mm 99 Gs
9.9 mT
 0.00 kg / 0.00 LBS
1.5 g / 0.0 N
 safe
15 mm 35 Gs
3.5 mT
 0.00 kg / 0.00 LBS
0.2 g / 0.0 N
 safe
20 mm 16 Gs
1.6 mT
 0.00 kg / 0.00 LBS
0.0 g / 0.0 N
 safe
30 mm 5 Gs
0.5 mT
 0.00 kg / 0.00 LBS
0.0 g / 0.0 N
 safe
50 mm 1 Gs
0.1 mT
 0.00 kg / 0.00 LBS
0.0 g / 0.0 N
 safe
Magnetic force decreases significantly with every mm of gap. Note that even a microscopic distance (e.g., contamination, paint, veneer) noticeably diminishes the holding power. Neodymiums hold optimally during direct contact; air break weakens the power. Analyze how quickly the pull force plummet, when the magnet does not touch tightly to the steel surface. When designing the arrangement, avoid additional spacers.

Table 2: Sliding force (wall)
MW 8x1.5 / N38

Distance (mm) Friction coefficient Pull Force (kg/lbs/g/N)
0 mm Stal (~0.2) 0.15 kg / 0.33 LBS
148.0 g / 1.5 N
1 mm Stal (~0.2) 0.10 kg / 0.22 LBS
100.0 g / 1.0 N
2 mm Stal (~0.2) 0.05 kg / 0.12 LBS
54.0 g / 0.5 N
3 mm Stal (~0.2) 0.03 kg / 0.06 LBS
26.0 g / 0.3 N
5 mm Stal (~0.2) 0.01 kg / 0.01 LBS
6.0 g / 0.1 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
The table below indicates the estimated weight limit sufficient to start the sliding of the magnet downwards along a vertical steel wall (assuming standard friction coefficient). This parameter varies with the separation distance between the magnet and the surface.

Table 3: Vertical assembly (sliding) - vertical pull
MW 8x1.5 / N38

Surface type Friction coefficient / % Mocy Max load (kg/lbs/g/N)
Raw steel
µ = 0.3 30% Nominalnej Siły
0.22 kg / 0.49 LBS
222.0 g / 2.2 N
Painted steel (standard)
µ = 0.2 20% Nominalnej Siły
0.15 kg / 0.33 LBS
148.0 g / 1.5 N
Oily/slippery steel
µ = 0.1 10% Nominalnej Siły
0.07 kg / 0.16 LBS
74.0 g / 0.7 N
Magnet with anti-slip rubber
µ = 0.5 50% Nominalnej Siły
0.37 kg / 0.82 LBS
370.0 g / 3.6 N
When placing a magnet on a vertical surface (e.g., a board), it you can count on just approx. 1/5 of nominal attraction strength. Gravity and a low friction coefficient cause that magnets slip easier than they pop off the substrate. Want to create a wall mount? Note that the sliding force is significantly lower than the perpendicular breakaway force. On a slippery surface, the holder will slide down under a significantly smaller cargo. Utilizing a rubberized pad can significantly increase the grip.

Table 4: Material efficiency (substrate influence) - sheet metal selection
MW 8x1.5 / N38

Steel thickness (mm) % power Real pull force (kg/lbs/g/N)
0.5 mm
10%
 0.07 kg / 0.16 LBS
74.0 g / 0.7 N
1 mm
25%
 0.19 kg / 0.41 LBS
185.0 g / 1.8 N
2 mm
50%
 0.37 kg / 0.82 LBS
370.0 g / 3.6 N
3 mm
75%
 0.55 kg / 1.22 LBS
555.0 g / 5.4 N
5 mm
100%
 0.74 kg / 1.63 LBS
740.0 g / 7.3 N
10 mm
100%
 0.74 kg / 1.63 LBS
740.0 g / 7.3 N
11 mm
100%
 0.74 kg / 1.63 LBS
740.0 g / 7.3 N
12 mm
100%
 0.74 kg / 1.63 LBS
740.0 g / 7.3 N
A too thin steel is not enough to focus the full magnetic flux, which weakens actual performance of the holder. If you install a neodymium to a thin surface, the flux will pass right through and the pull force will drop sharply. To achieve full efficiency of this neodymium's potential, you need a suitably thick element of steel. The material oversaturation causes that on delicate walls (e.g., thin profiles), the product works worse. We recommend selecting the steel dimension from these parameters.

Table 5: Thermal stability (stability) - power drop
MW 8x1.5 / N38

Ambient temp. (°C) Power loss Remaining pull (kg/lbs/g/N) Status
20 °C 0.0% 0.74 kg / 1.63 LBS
740.0 g / 7.3 N
 OK
40 °C -2.2% 0.72 kg / 1.60 LBS
723.7 g / 7.1 N
 OK
60 °C -4.4% 0.71 kg / 1.56 LBS
707.4 g / 6.9 N
80 °C -6.6% 0.69 kg / 1.52 LBS
691.2 g / 6.8 N
100 °C -28.8% 0.53 kg / 1.16 LBS
526.9 g / 5.2 N
Ordinary NdFeB products lose strength above the temperature limit. Protect against heat – excessive heat can permanently demagnetize this product. With increasing heat, the magnet's capacity momentarily decreases. Do not use this magnet close to heaters higher than its operating temperature limit. Ignoring the limit will result in destruction of magnetism.
*Technical advisory: Heat tolerance depends not only on the material grade, but also on the magnet's shape. Flat magnets (pancake types) are more susceptible to demagnetization at lower temperatures than taller cylinders. The danger warning in the table signals a risk of irreversible loss for this specific geometry.

Table 6: Two magnets (attraction) - forces in the system
MW 8x1.5 / N38

Gap (mm) Attraction (kg/lbs) (N-S) Sliding Force (kg/lbs/g/N) Repulsion (kg/lbs) (N-N)
0 mm 1.46 kg / 3.23 LBS
3 712 Gs
0.22 kg / 0.48 LBS
220 g / 2.2 N
 N/A
1 mm 1.24 kg / 2.74 LBS
4 007 Gs
0.19 kg / 0.41 LBS
187 g / 1.8 N
 1.12 kg / 2.47 LBS
~0 Gs
2 mm 0.98 kg / 2.17 LBS
3 565 Gs
0.15 kg / 0.33 LBS
148 g / 1.4 N
 0.89 kg / 1.95 LBS
~0 Gs
3 mm 0.74 kg / 1.63 LBS
3 086 Gs
0.11 kg / 0.24 LBS
111 g / 1.1 N
 0.66 kg / 1.46 LBS
~0 Gs
5 mm 0.37 kg / 0.82 LBS
2 196 Gs
0.06 kg / 0.12 LBS
56 g / 0.5 N
 0.34 kg / 0.74 LBS
~0 Gs
10 mm 0.06 kg / 0.13 LBS
878 Gs
0.01 kg / 0.02 LBS
9 g / 0.1 N
 0.05 kg / 0.12 LBS
~0 Gs
20 mm 0.00 kg / 0.01 LBS
199 Gs
0.00 kg / 0.00 LBS
0 g / 0.0 N
 0.00 kg / 0.00 LBS
~0 Gs
50 mm 0.00 kg / 0.00 LBS
17 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
10 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
6 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
4 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
3 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
2 Gs
0.00 kg / 0.00 LBS
0 g / 0.0 N
 0.00 kg / 0.00 LBS
~0 Gs
Two strong neodymiums attract each other from a significantly greater distance than a magnet and sheet combination. Such a system of magnet-to-magnet generates a stronger field and a wider radius of operation. Planning to create a solid fastener? Utilize two neodymiums instead of one magnet and a striker plate. Exercise caution that when bringing together two magnets, the collision energy is extreme. The repulsion force is slightly lower than the connection force, but still large.
*Flux density between like poles reaches ~0 Gs at the geometric center between the magnets (due to field cancellation).
* Estimates show shear force of dual same magnets (friction coefficient ~0.15 for Ni-Ni layer).

Table 7: Hazards (electronics) - precautionary measures
MW 8x1.5 / N38

Object / Device Limit (Gauss) / mT Safe distance
Pacemaker 5 Gs (0.5 mT) 3.0 cm
Hearing aid 10 Gs (1.0 mT) 2.5 cm
Timepiece 20 Gs (2.0 mT) 2.0 cm
Phone / Smartphone 40 Gs (4.0 mT) 1.5 cm
Remote 50 Gs (5.0 mT) 1.5 cm
Payment card 400 Gs (40.0 mT) 1.0 cm
HDD hard drive 600 Gs (60.0 mT) 0.5 cm
Powerful magnet radiation poses a serious hazard to IT equipment and pacemakers. These NdFeB products generate a flux that destroys function of sensitive medical devices. Be aware: the invisible magnetic field acts through matter and housings. Special caution must be exercised by people with cochlear implants and insulin pumps. Also at risk are: mechanical watches, car keys, speakers, and screens. Do not bring the product near payment cards, HDD media, or precise measuring instruments.

Table 8: Dynamics (cracking risk) - collision effects
MW 8x1.5 / N38

Start from (mm) Speed (km/h) Energy (J) Predicted outcome
10 mm 36.39 km/h
(10.11 m/s)
 0.03 J
30 mm 62.94 km/h
(17.48 m/s)
 0.09 J
50 mm 81.25 km/h
(22.57 m/s)
 0.15 J
100 mm 114.91 km/h
(31.92 m/s)
 0.29 J
Magnetic elements are very brittle – a violent impact against metal can result in shattering. Pay attention to connection velocity – a neodymium left loose becomes dangerous. Impact energy can destroy the magnet or painful pinches to skin. Always hold the magnet during mounting so it doesn't hit violently against the steel surface. A collision at high speed almost guarantees destruction of the magnet. Wear safety glasses when handling with powerful specimens.

Table 9: Corrosion resistance
MW 8x1.5 / 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)
Neodymium magnets are highly susceptible to corrosion without proper protection. Note the thickness of the protective layer.

Table 10: Electrical data (Pc)
MW 8x1.5 / N38

Parameter Value SI Unit / Description
Magnetic Flux 1 285 Mx 12.9 µWb
Pc Coefficient 0.27 Low (Flat)
Flux value emitted by the pole surface. Essential parameter in coil applications as well as sensors. Pc value determines the working geometry.

Table 11: Underwater work (magnet fishing)
MW 8x1.5 / N38

Environment Effective steel pull Effect
Air (land) 0.74 kg Standard
Water (riverbed) 0.85 kg
(+0.11 kg buoyancy gain)
+14.5%
Warning: Standard nickel requires drying after every contact with moisture; lack of maintenance will lead to rust spots.
In water, the magnet feels stronger thanks to Archimedes' principle. Note: for permanent underwater work, we recommend magnets with an anti-corrosive (epoxy) coating.
1. Wall mount (shear)

*Warning: On a vertical wall, the magnet retains merely ~20% of its perpendicular strength.

2. Plate thickness effect

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

3. Temperature resistance

*For N38 grade, the safety limit is 80°C.

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

chart generated for the permeance coefficient Pc (Permeance Coefficient) = 0.27

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
Elemental analysis
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%
Ecology and recycling (GPSR)
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: 010101-2026
Measurement Calculator
Magnet pull force
Magnetic Field
Input your figure in one of the inputs, and the remaining units convert in real-time.

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This product is an exceptionally strong cylinder magnet, produced from modern NdFeB material, which, at dimensions of Ø8x1.5 mm, guarantees maximum efficiency. This specific item features an accuracy of ±0.1mm and professional build quality, making it an excellent solution for the most demanding engineers and designers. As a magnetic rod with significant force (approx. 0.74 kg), this product is in stock from our warehouse in Poland, ensuring rapid order fulfillment. Moreover, its triple-layer Ni-Cu-Ni coating effectively protects it against corrosion in standard operating conditions, ensuring an aesthetic appearance and durability for years.
This model is perfect for building electric motors, advanced sensors, and efficient magnetic separators, where maximum induction on a small surface counts. Thanks to the high power of 7.27 N with a weight of only 0.57 g, this cylindrical magnet is indispensable in miniature devices and wherever low weight is crucial.
Due to the brittleness of the NdFeB material, you must not use force-fitting (so-called press-fit), as this risks chipping the coating of this professional component. To ensure long-term durability in industry, anaerobic resins are used, which do not react with the nickel coating 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 excessive miniaturization with maximum force is not required. If you need even stronger magnets in the same volume (Ø8x1.5), contact us regarding higher grades (e.g., N50, N52), however, N38 is the standard available off-the-shelf in our store.
This model is characterized by dimensions Ø8x1.5 mm, which, at a weight of 0.57 g, makes it an element with impressive magnetic energy density. The value of 7.27 N means that the magnet is capable of holding a weight many times exceeding its own mass of 0.57 g. The product has a [NiCuNi] coating, which protects the surface against external factors, giving it an aesthetic, silvery shine.
This rod magnet is magnetized axially (along the height of 1.5 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.

Pros as well as cons of Nd2Fe14B magnets.

Pros

Besides their stability, neodymium magnets are valued for these benefits:
  • They have unchanged lifting capacity, and over around 10 years their performance decreases symbolically – ~1% (according to theory),
  • They retain their magnetic properties even under close interference source,
  • In other words, due to the aesthetic surface of nickel, the element looks attractive,
  • Neodymium magnets generate maximum magnetic induction on a small area, which allows for strong attraction,
  • Due to their durability and thermal resistance, neodymium magnets are capable of operate (depending on the form) even at high temperatures reaching 230°C or more...
  • Thanks to versatility in shaping and the capacity to modify to client solutions,
  • Universal use in innovative solutions – they find application in magnetic memories, electromotive mechanisms, advanced medical instruments, also industrial machines.
  • Compactness – despite small sizes they generate large force, making them ideal for precision applications

Weaknesses

What to avoid - cons of neodymium magnets: application proposals
  • At very strong impacts they can crack, therefore we recommend placing them in strong housings. A metal housing provides additional protection against damage and increases the magnet's durability.
  • Neodymium magnets decrease their force 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 stability even at temperatures up to 230°C
  • 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, in case of application outdoors
  • Limited ability of creating threads in the magnet and complex shapes - recommended is cover - mounting mechanism.
  • Possible danger to health – tiny shards of magnets pose a threat, when accidentally swallowed, which is particularly important in the context of child safety. It is also worth noting that small components of these magnets can complicate diagnosis medical when they are in the body.
  • With large orders the cost of neodymium magnets can be a barrier,

Pull force analysis

Maximum magnetic pulling force – what contributes to it?

Holding force of 0.74 kg is a theoretical maximum value performed under the following configuration:
  • on a block made of mild steel, effectively closing the magnetic flux
  • with a cross-section of at least 10 mm
  • characterized by lack of roughness
  • under conditions of gap-free contact (metal-to-metal)
  • for force acting at a right angle (in the magnet axis)
  • in stable room temperature

Lifting capacity in practice – influencing factors

It is worth knowing that the working load will differ depending on elements below, in order of importance:
  • Gap (betwixt the magnet and the metal), because even a tiny clearance (e.g. 0.5 mm) leads to a reduction in force by up to 50% (this also applies to varnish, rust or dirt).
  • Load vector – maximum parameter is obtained only during pulling at a 90° angle. The resistance to sliding of the magnet along the surface is usually several times smaller (approx. 1/5 of the lifting capacity).
  • Wall thickness – thin material does not allow full use of the magnet. Magnetic flux penetrates through instead of generating force.
  • Metal type – different alloys reacts the same. Alloy additives worsen the attraction effect.
  • Surface quality – the more even the plate, the larger the contact zone and stronger the hold. Roughness creates an air distance.
  • Operating temperature – neodymium magnets have a negative temperature coefficient. At higher temperatures they are weaker, and in frost gain strength (up to a certain limit).

Lifting capacity testing was performed on plates with a smooth surface of optimal thickness, under perpendicular forces, in contrast under attempts to slide the magnet the load capacity is reduced by as much as fivefold. Additionally, even a small distance between the magnet’s surface and the plate reduces the lifting capacity.

H&S for magnets
Demagnetization risk

Monitor thermal conditions. Exposing the magnet to high heat will destroy its magnetic structure and strength.

Do not drill into magnets

Fire warning: Neodymium dust is explosive. Do not process magnets in home conditions as this risks ignition.

Swallowing risk

Strictly store magnets out of reach of children. Choking hazard is significant, and the effects of magnets connecting inside the body are fatal.

Precision electronics

GPS units and mobile phones are extremely sensitive to magnetic fields. Direct contact with a powerful NdFeB magnet can permanently damage the sensors in your phone.

Safe operation

Before starting, read the rules. Uncontrolled attraction can break the magnet or hurt your hand. Be predictive.

Crushing risk

Big blocks can break fingers instantly. Never place your hand betwixt two attracting surfaces.

Pacemakers

For implant holders: Powerful magnets affect medical devices. Keep minimum 30 cm distance or ask another person to handle the magnets.

Protective goggles

Despite the nickel coating, the material is delicate and not impact-resistant. Do not hit, as the magnet may shatter into hazardous fragments.

Safe distance

Powerful magnetic fields can corrupt files on payment cards, HDDs, and other magnetic media. Keep a distance of at least 10 cm.

Nickel allergy

It is widely known that the nickel plating (standard magnet coating) is a strong allergen. For allergy sufferers, refrain from touching magnets with bare hands or choose coated magnets.

Warning! Need more info? Read our article: Are neodymium magnets dangerous?