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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

see specifications »

0.455 ZŁ with VAT / pcs + price for transport

0.370 ZŁ net + 23% VAT / pcs

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Technical specification - 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 - data

The following data constitute the result of a engineering analysis. Results are based on algorithms for the class Nd2Fe14B. Operational performance may differ from theoretical values. Use these calculations as a reference point when designing systems.

Table 1: Static pull force (pull vs gap) - characteristics
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 pounds
740.0 g / 7.3 N
 weak grip
1 mm 1782 Gs
178.2 mT
 0.50 kg / 1.10 pounds
497.3 g / 4.9 N
 weak grip
2 mm 1310 Gs
131.0 mT
 0.27 kg / 0.59 pounds
268.7 g / 2.6 N
 weak grip
3 mm 914 Gs
91.4 mT
 0.13 kg / 0.29 pounds
130.8 g / 1.3 N
 weak grip
5 mm 439 Gs
43.9 mT
 0.03 kg / 0.07 pounds
30.2 g / 0.3 N
 weak grip
10 mm 99 Gs
9.9 mT
 0.00 kg / 0.00 pounds
1.5 g / 0.0 N
 weak grip
15 mm 35 Gs
3.5 mT
 0.00 kg / 0.00 pounds
0.2 g / 0.0 N
 weak grip
20 mm 16 Gs
1.6 mT
 0.00 kg / 0.00 pounds
0.0 g / 0.0 N
 weak grip
30 mm 5 Gs
0.5 mT
 0.00 kg / 0.00 pounds
0.0 g / 0.0 N
 weak grip
50 mm 1 Gs
0.1 mT
 0.00 kg / 0.00 pounds
0.0 g / 0.0 N
 weak grip
Magnetic force weakens drastically per each millimeter of distance. Keep in mind that even a microscopic distance (e.g., dirt, varnish, rust) noticeably diminishes the holding power. Neodymiums hold strongest at the point of direct contact; air break drastically cuts the force. See how quickly the pull force fall, when the product does not adhere flatly to the metal substrate. When planning the mounting, eliminate additional spacers.

Table 2: Vertical hold (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 pounds
148.0 g / 1.5 N
1 mm Stal (~0.2) 0.10 kg / 0.22 pounds
100.0 g / 1.0 N
2 mm Stal (~0.2) 0.05 kg / 0.12 pounds
54.0 g / 0.5 N
3 mm Stal (~0.2) 0.03 kg / 0.06 pounds
26.0 g / 0.3 N
5 mm Stal (~0.2) 0.01 kg / 0.01 pounds
6.0 g / 0.1 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
The following data indicates the approximate weight limit sufficient to cause the shifting of the magnet vertically on a upright steel plate (assuming typical friction). This parameter varies with the air gap between the magnet and the surface.

Table 3: Wall mounting (sliding) - behavior on slippery surfaces
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 pounds
222.0 g / 2.2 N
Painted steel (standard)
µ = 0.2 20% Nominalnej Siły
0.15 kg / 0.33 pounds
148.0 g / 1.5 N
Oily/slippery steel
µ = 0.1 10% Nominalnej Siły
0.07 kg / 0.16 pounds
74.0 g / 0.7 N
Magnet with anti-slip rubber
µ = 0.5 50% Nominalnej Siły
0.37 kg / 0.82 pounds
370.0 g / 3.6 N
When mounting a holder on a vertical plane (e.g., a car body), it will maintain just approx. 20%-30% of its maximum pull force. Gravity and a low friction coefficient influence the fact that holders slide down easier than they pop off the substrate. Planning a wall mount? Consider that the shear force is much weaker than the maximum static pull force. On a smooth steel, the holder will slide down under a noticeably lighter weight. Using a rubber coating can effectively increase the grip.

Table 4: Steel thickness (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 pounds
74.0 g / 0.7 N
1 mm
25%
 0.19 kg / 0.41 pounds
185.0 g / 1.8 N
2 mm
50%
 0.37 kg / 0.82 pounds
370.0 g / 3.6 N
3 mm
75%
 0.55 kg / 1.22 pounds
555.0 g / 5.4 N
5 mm
100%
 0.74 kg / 1.63 pounds
740.0 g / 7.3 N
10 mm
100%
 0.74 kg / 1.63 pounds
740.0 g / 7.3 N
11 mm
100%
 0.74 kg / 1.63 pounds
740.0 g / 7.3 N
12 mm
100%
 0.74 kg / 1.63 pounds
740.0 g / 7.3 N
A too thin steel is not enough to conduct the full magnetic flux, which weakens actual performance of the holder. Should you install a neodymium to a weak sheet, the flux will pass right through and the attraction force will be weaker. To achieve the maximum of this neodymium's power, you need a suitably thick piece of metal. The saturation effect means that on sheet metal structures (e.g., appliance housings), the product works worse. We suggest choosing the steel dimension based on the following data.

Table 5: Working in heat (stability) - resistance threshold
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 pounds
740.0 g / 7.3 N
 OK
40 °C -2.2% 0.72 kg / 1.60 pounds
723.7 g / 7.1 N
 OK
60 °C -4.4% 0.71 kg / 1.56 pounds
707.4 g / 6.9 N
80 °C -6.6% 0.69 kg / 1.52 pounds
691.2 g / 6.8 N
100 °C -28.8% 0.53 kg / 1.16 pounds
526.9 g / 5.2 N
Ordinary NdFeB products irreversibly lose power after exceeding the maximum temperature. Protect against heat – excessive heat can irreversibly destroy this magnet. With increasing heat, the magnet's capacity momentarily decreases. Avoid using this product in hot environments exceeding its operating temperature limit. Ignoring the limit will lead to permanent loss of magnetic properties.
*Important note: Thermal stability depends not only on the material grade, but also on the magnet's shape. Flat magnets (pancake types) risk losing magnetic properties under lower heat stress than taller cylinders. Warning indicator in the table points to a risk of irreversible loss for this particular item.

Table 6: Two magnets (attraction) - field collision
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 pounds
3 712 Gs
0.22 kg / 0.48 pounds
220 g / 2.2 N
 N/A
1 mm 1.24 kg / 2.74 pounds
4 007 Gs
0.19 kg / 0.41 pounds
187 g / 1.8 N
 1.12 kg / 2.47 pounds
~0 Gs
2 mm 0.98 kg / 2.17 pounds
3 565 Gs
0.15 kg / 0.33 pounds
148 g / 1.4 N
 0.89 kg / 1.95 pounds
~0 Gs
3 mm 0.74 kg / 1.63 pounds
3 086 Gs
0.11 kg / 0.24 pounds
111 g / 1.1 N
 0.66 kg / 1.46 pounds
~0 Gs
5 mm 0.37 kg / 0.82 pounds
2 196 Gs
0.06 kg / 0.12 pounds
56 g / 0.5 N
 0.34 kg / 0.74 pounds
~0 Gs
10 mm 0.06 kg / 0.13 pounds
878 Gs
0.01 kg / 0.02 pounds
9 g / 0.1 N
 0.05 kg / 0.12 pounds
~0 Gs
20 mm 0.00 kg / 0.01 pounds
199 Gs
0.00 kg / 0.00 pounds
0 g / 0.0 N
 0.00 kg / 0.00 pounds
~0 Gs
50 mm 0.00 kg / 0.00 pounds
17 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
10 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
6 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
4 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
3 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
2 Gs
0.00 kg / 0.00 pounds
0 g / 0.0 N
 0.00 kg / 0.00 pounds
~0 Gs
Two magnets interact from a significantly greater distance than a magnet and sheet combination. Such a system of two magnets produces a massive flux and a larger range of operation. Designing a powerful holder? Apply two magnets instead of a neodymium and a steel. Exercise caution that when attracting two neodymiums, the collision energy is extreme. The repulsion force is marginally weaker than the connection force, but still impressive.
*The magnetic induction for N-N configuration reaches ~0 Gs at the midpoint between the magnets (resulting from vector opposition).
Attention: Figures demonstrate shear force of two matching neodymium magnets (friction coefficient ~0.15 for Ni-Ni plating).

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
A strong magnetic field poses a serious hazard to IT equipment as well as pacemakers. These NdFeB products produce a flux that destroys function of digital equipment. Remember: the invisible magnetic field passes through tissues and plastic. Special caution must be taken by people with cochlear implants and insulin pumps. The risk also applies to: mechanical watches, remotes, membranes, and displays. Do not place the magnet near cards, hard drives, or sensitive navigation tools.

Table 8: Collisions (kinetic energy) - 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 prone to chipping – a collision with steel risks their cracking. Pay attention to connection velocity – a neodymium left loose turns into a projectile. Impact energy can cause material chips or dangerous crushing to fingers. Always hold the magnet during mounting so it doesn't slam with momentum against the metal. A collision at high speed almost guarantees destruction of the neodymium. Wear eye protection when working with powerful specimens.

Table 9: Coating parameters (durability)
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)
The following table defines the conditions under which this product can be safely used. The silver nickel coating also serves an aesthetic function but is not fully waterproof.

Table 10: Construction 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)
Total magnetic flux passing through the magnet pole. Key data when building generators 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%
Corrosion warning: Remember to wipe the magnet thoroughly after removing it from water and apply a protective layer (e.g., oil) to avoid corrosion.
In water, the magnet feels stronger thanks to Archimedes' principle. As a result, your magnet will pull a heavier object from the bottom than if you lifted it in the air.
1. Vertical hold

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

2. Steel saturation

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

3. Thermal stability

*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

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
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%
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: 010101-2026
Measurement Calculator
Pulling force
Magnetic Induction
Input a number in any box, and the rest convert on the fly.

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This product is an extremely powerful rod magnet, manufactured from durable NdFeB material, which, at dimensions of Ø8x1.5 mm, guarantees maximum efficiency. The MW 8x1.5 / N38 component is characterized by a tolerance of ±0.1mm and professional build quality, making it an excellent solution for professional engineers and designers. As a magnetic rod with significant force (approx. 0.74 kg), this product is available off-the-shelf from our European logistics center, ensuring quick order fulfillment. Moreover, its 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 field concentration on a small surface counts. Thanks to the pull force of 7.27 N with a weight of only 0.57 g, this rod is indispensable in electronics and wherever every gram matters.
Since our magnets have a very precise dimensions, the best method is to glue them into holes with a slightly larger diameter (e.g., 8.1 mm) using two-component epoxy glues. To ensure stability in industry, specialized industrial adhesives 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 suitable for the majority of applications in automation and machine building, where extreme 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.
The presented product is a neodymium magnet with precisely defined parameters: diameter 8 mm and height 1.5 mm. 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 secures it against oxidation, giving it an aesthetic, silvery shine.
Standardly, the magnetic axis runs through the center of the cylinder, causing the greatest attraction force to occur on the bases with a diameter of 8 mm. 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 neodymium magnets.

Strengths

Besides their immense magnetic power, neodymium magnets offer the following advantages:
  • They retain attractive force for almost ten years – the drop is just ~1% (based on simulations),
  • Neodymium magnets are distinguished by extremely resistant to magnetic field loss caused by magnetic disturbances,
  • Thanks to the smooth finish, the layer of Ni-Cu-Ni, gold-plated, or silver-plated gives an professional appearance,
  • Magnets possess huge magnetic induction on the outer layer,
  • 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...
  • Possibility of precise shaping and adapting to specific requirements,
  • Fundamental importance in modern technologies – they are used in mass storage devices, brushless drives, advanced medical instruments, and industrial machines.
  • Compactness – despite small sizes they generate large force, making them ideal for precision applications

Disadvantages

Disadvantages of NdFeB magnets:
  • To avoid cracks upon strong impacts, we suggest using special steel housings. Such a solution secures the magnet and simultaneously increases its durability.
  • When exposed to high temperature, neodymium magnets suffer a drop in force. Often, when the temperature exceeds 80°C, their power decreases (depending on the size and 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. For use outdoors we advise using waterproof magnets e.g. in rubber, plastic
  • Due to limitations in realizing threads and complex shapes in magnets, we propose using cover - magnetic mount.
  • Possible danger to health – tiny shards of magnets can be dangerous, if swallowed, which gains importance in the context of child health protection. It is also worth noting that tiny parts of these devices are able to disrupt the diagnostic process medical when they are in the body.
  • Higher cost of purchase is a significant factor to consider compared to ceramic magnets, especially in budget applications

Pull force analysis

Highest magnetic holding force – what it depends on?

Breakaway force was defined for optimal configuration, assuming:
  • using a sheet made of high-permeability steel, acting as a circuit closing element
  • with a cross-section of at least 10 mm
  • characterized by smoothness
  • without the slightest clearance between the magnet and steel
  • for force acting at a right angle (pull-off, not shear)
  • in neutral thermal conditions

Impact of factors on magnetic holding capacity in practice

In practice, the actual lifting capacity results from a number of factors, ranked from the most important:
  • Air gap (betwixt the magnet and the plate), since even a very small distance (e.g. 0.5 mm) leads to a reduction in force by up to 50% (this also applies to varnish, rust or debris).
  • Force direction – declared lifting capacity refers to detachment vertically. When applying parallel force, the magnet holds significantly lower power (typically approx. 20-30% of maximum force).
  • Metal thickness – thin material does not allow full use of the magnet. Magnetic flux passes through the material instead of generating force.
  • Material type – the best choice is pure iron steel. Stainless steels may generate lower lifting capacity.
  • Base smoothness – the smoother and more polished the plate, the better the adhesion and stronger the hold. Roughness creates an air distance.
  • Temperature influence – hot environment reduces pulling force. Too high temperature can permanently demagnetize the magnet.

Holding force was checked on a smooth steel plate 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 minimal clearance between the magnet’s surface and the plate reduces the load capacity.

Warnings
Keep away from electronics

GPS units and mobile phones are highly susceptible to magnetism. Direct contact with a powerful NdFeB magnet can permanently damage the sensors in your phone.

Caution required

Handle with care. Neodymium magnets act from a distance and connect with massive power, often quicker than you can move away.

Swallowing risk

Strictly store magnets out of reach of children. Ingestion danger is high, and the consequences of magnets connecting inside the body are very dangerous.

Pinching danger

Protect your hands. Two powerful magnets will join instantly with a force of massive weight, destroying anything in their path. Exercise extreme caution!

Thermal limits

Avoid heat. NdFeB magnets are sensitive to heat. If you require resistance above 80°C, look for special high-temperature series (H, SH, UH).

Cards and drives

Do not bring magnets close to a wallet, computer, or TV. The magnetism can irreversibly ruin these devices and erase data from cards.

Health Danger

Patients with a ICD must maintain an safe separation from magnets. The magnetic field can stop the operation of the life-saving device.

Metal Allergy

Studies show that nickel (standard magnet coating) is a strong allergen. If your skin reacts to metals, prevent direct skin contact and opt for encased magnets.

Protective goggles

Despite the nickel coating, neodymium is delicate and not impact-resistant. Avoid impacts, as the magnet may shatter into sharp, dangerous pieces.

Fire warning

Fire hazard: Rare earth powder is highly flammable. Do not process magnets without safety gear as this may cause fire.

Caution! Looking for details? Check our post: Are neodymium magnets dangerous?