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MW 8x1.5 / N38 - cylindrical magnet

cylindrical magnet

Catalog no 010101

GTIN/EAN: 5906301811008

5.00
Load capacity 0.74 kg / 7.27 N Magnetic Induction 217.52 mT / 2175 Gs
Diameter Ø
8 mm [±0,1 mm]
Height
1.5 mm [±0,1 mm]
Weight
0.57 g
Magnetization Direction
↑ axial
Coating
[NiCuNi] Nickel
product specifications »

0.455 zł with VAT / pcs + price for transport

0.370 zł net + 23% VAT / pcs

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Engineering report for this magnet

Full PDF analysis: pull and shear force, effect of distance, temperature and plate thickness, safety distances and the demagnetization curve.

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Physical properties - 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 modeling of the product - report

Presented data are the outcome of a mathematical calculation. Results are based on algorithms for the class Nd2Fe14B. Actual conditions may differ. Use these data as a supplementary guide during assembly planning.

Table 1: Static force (force vs distance) - 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 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
Grip strength weakens drastically with every mm of gap. Note that even a microscopic distance (e.g., contamination, varnish, veneer) noticeably reduces the pull force. Magnetic products hold strongest in perfect adhesion; distance kills the power. Observe how quickly the pull force plummet, when the magnet does not touch flatly to the steel surface. When calculating the arrangement, eliminate redundant distances.

Table 2: Slippage hold (vertical surface)
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
This section shows the approximate holding capacity necessary to cause the slippage of the magnet down on a vertical steel wall (considering typical friction coefficient). This parameter is relative to the distance between the magnet and the metal.

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 hanging a element on a upright surface (e.g., a fridge), it you can count on barely approx. 1/5 of its nominal power. Gravitational force as well as a weak degree of grip mean that magnets slide down faster than they pop off the substrate. Want to create a vertical fastening? Consider that the shear force is noticeably lower than the maximum static pull force. On a smooth steel, the holder will slip down under a significantly smaller weight. Using a rubber layer can drastically 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 thin metal plate cannot absorb the full magnetic flux, which squanders power of the magnet. Should you mount a strong magnet to a thin surface, the magnetism will penetrate right through and the pull force will drop sharply. To achieve the maximum of this neodymium's potential, you need a suitably thick element of metal. The material oversaturation causes that on sheet metal structures (e.g., thin profiles), the holder holds weaker. We recommend selecting the steel dimension from these parameters.

Table 5: Working in heat (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 change their properties parameters past the thermal threshold. Watch out for overheating – excessive heat can permanently destroy this product. With every degree above norm, the magnet's force momentarily decreases. Do not use this product close to heaters exceeding its operating temperature limit. Too high temperature will result in irreversible degradation of magnetic properties.
*Engineering note: Temperature resistance depends not only on the material grade, but also on the magnet's shape. Thin magnets (low permeance coefficient) are more susceptible to demagnetization under lower heat stress compared to rod magnets. Red status in the table indicates permanent field degradation for this specific geometry.

Table 6: Two magnets (repulsion) - field collision
MW 8x1.5 / N38

Gap (mm) Attraction (kg/lbs) (N-S) Shear 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 magnetic products interact from a wider radius than a neodymium and metal setup. Such a system of two magnets generates a stronger field and a wider radius of performance. Planning to create a solid fastener? Apply two magnets instead of a neodymium and a striker plate. Exercise caution that when connecting a pair of magnets, the pinch force is extreme. The levitation is marginally weaker than the connection force, but still significant.
*The magnetic induction in repulsion mode reaches ~0 Gs at the midpoint between the magnets (due to field cancellation).
* Results show shear force of dual matching neodymium magnets (friction ~0.15 for Ni-Ni coating).

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 electronics and pacemakers. These neodymiums produce a field that prevents correct functioning of sensitive medical devices. Be aware: the unseen radiation acts through matter and plastic. Increased vigilance must be exercised by people with cochlear implants and drug dispensers. The risk also applies to: automatic timepieces, remotes, speakers, and screens. Avoid contact with magnetic cards, hard drives, or precise measuring instruments.

Table 8: Collisions (kinetic energy) - collision effects
MW 8x1.5 / N38

Start from (mm) Speed (km/h) Energy (J) Predicted outcome
10 mm 24.77 km/h
(6.88 m/s)
 0.01 J
30 mm 24.80 km/h
(6.89 m/s)
 0.01 J
50 mm 24.80 km/h
(6.89 m/s)
 0.01 J
100 mm 24.80 km/h
(6.89 m/s)
 0.01 J
Neodymium magnets are prone to chipping – a collision with steel can result in shattering. Pay attention to connection velocity – a magnet released freely becomes dangerous. Kinetic force can destroy the magnet or painful pinches to skin. Hold the magnet firmly during installation so it doesn't hit with great force against the metal. A contact at a velocity of dozens of km/h almost guarantees destruction of the neodymium. Use safety goggles when playing with powerful specimens.

Table 9: Surface protection spec
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)
For outdoor applications, an epoxy coating is required; standard nickel is intended for indoor use. The silver nickel coating also serves an aesthetic function but is not fully waterproof.

Table 10: Construction data (Flux)
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 pole surface. Essential parameter in coil applications and motors. The Pc coefficient determines the working geometry.

Table 11: Physics of underwater searching
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: This magnet has a standard nickel coating. After use in water, it must be dried and maintained immediately, otherwise it will rust!
The magnetic field penetrates through water without any losses. However, remember the water resistance when pulling the rope quickly.

1. Shear force

*Caution: On a vertical surface, the magnet holds just ~20% of its max power.

2. Steel thickness impact

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

3. Temperature resistance

*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) = 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.

Technical and environmental data

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
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The offered product is an extremely powerful cylinder magnet, manufactured from durable NdFeB material, which, with dimensions of Ø8x1.5 mm, guarantees the highest energy density. This specific item is characterized by high dimensional repeatability and professional build quality, making it an ideal solution for professional engineers and designers. As a magnetic rod with impressive force (approx. 0.74 kg), this product is in stock from our warehouse in Poland, ensuring lightning-fast order fulfillment. Additionally, its Ni-Cu-Ni coating shields it against corrosion in typical operating conditions, guaranteeing an aesthetic appearance and durability for years.
It successfully proves itself in modeling, advanced automation, and broadly understood industry, serving as a positioning or actuating element. Thanks to the pull force of 7.27 N with a weight of only 0.57 g, this rod is indispensable in miniature devices and wherever every gram matters.
Due to the brittleness of the NdFeB material, we absolutely advise against force-fitting (so-called press-fit), as this risks immediate cracking of this precision component. To ensure stability in industry, anaerobic resins are used, which do not react with the nickel coating and fill the gap, guaranteeing durability of the connection.
Grade N38 is the most popular standard for industrial neodymium magnets, offering an optimal price-to-power ratio and high resistance to demagnetization. If you need the strongest magnets in the same volume (Ø8x1.5), contact us regarding higher grades (e.g., N50, N52), however, N38 is the standard in continuous sale 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 key parameter here is the lifting capacity amounting to approximately 0.74 kg (force ~7.27 N), which, with such defined dimensions, proves the high power 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 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 and cons of neodymium magnets.

Advantages

Apart from their notable magnetism, neodymium magnets have these key benefits:
  • They retain magnetic properties for nearly ten years – the drop is just ~1% (in theory),
  • They have excellent resistance to magnetic field loss due to external fields,
  • A magnet with a metallic silver surface has better aesthetics,
  • They are known for high magnetic induction at the operating surface, which affects their effectiveness,
  • 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...
  • Due to the option of precise forming and customization to custom needs, magnetic components can be produced in a wide range of shapes and sizes, which increases their versatility,
  • Significant place in future technologies – they are used in mass storage devices, brushless drives, diagnostic systems, also industrial machines.
  • Relatively small size with high pulling force – neodymium magnets offer high power in small dimensions, which enables their usage in compact constructions

Limitations

Disadvantages of NdFeB magnets:
  • At strong impacts they can crack, therefore we recommend placing them in special holders. A metal housing provides additional protection against damage and increases the magnet's durability.
  • NdFeB magnets lose force when exposed to high temperatures. After reaching 80°C, many of them experience permanent drop of power (a factor is the shape and dimensions of the magnet). We offer magnets specially adapted to work at temperatures up to 230°C marked [AH], which are very resistant to heat
  • Due to the susceptibility of magnets to corrosion in a humid environment, we advise using waterproof magnets made of rubber, plastic or other material stable to moisture, in case of application outdoors
  • We suggest cover - magnetic mechanism, due to difficulties in creating threads inside the magnet and complex shapes.
  • Potential hazard related to microscopic parts of magnets can be dangerous, if swallowed, which becomes key in the context of child safety. Furthermore, small elements of these devices are able to be problematic in diagnostics medical when they are in the body.
  • Higher cost of purchase is one of the disadvantages compared to ceramic magnets, especially in budget applications

Pull force analysis

Highest magnetic holding force – what it depends on?

The force parameter is a result of laboratory testing performed under specific, ideal conditions:
  • using a plate made of low-carbon steel, functioning as a ideal flux conductor
  • with a cross-section of at least 10 mm
  • characterized by smoothness
  • with total lack of distance (without coatings)
  • during pulling in a direction perpendicular to the plane
  • at room temperature

Magnet lifting force in use – key factors

Holding efficiency is influenced by specific conditions, including (from most important):
  • Air gap (between the magnet and the metal), as even a very small distance (e.g. 0.5 mm) leads to a decrease in lifting capacity by up to 50% (this also applies to paint, rust or dirt).
  • Load vector – highest force is obtained only during pulling at a 90° angle. The shear force of the magnet along the surface is standardly several times lower (approx. 1/5 of the lifting capacity).
  • Metal thickness – the thinner the sheet, the weaker the hold. Part of the magnetic field passes through the material instead of converting into lifting capacity.
  • Chemical composition of the base – mild steel attracts best. Higher carbon content reduce magnetic permeability and holding force.
  • Smoothness – full contact is obtained only on polished steel. Any scratches and bumps create air cushions, reducing force.
  • Heat – NdFeB sinters have a negative temperature coefficient. When it is hot they lose power, and at low temperatures gain strength (up to a certain limit).

Lifting capacity was measured using a steel plate with a smooth surface of optimal thickness (min. 20 mm), under perpendicular pulling force, however under attempts to slide the magnet the load capacity is reduced by as much as 75%. In addition, even a slight gap between the magnet’s surface and the plate decreases the holding force.

Warnings
Dust explosion hazard

Powder generated during machining of magnets is flammable. Do not drill into magnets unless you are an expert.

Do not give to children

Product intended for adults. Tiny parts pose a choking risk, leading to serious injuries. Keep away from kids and pets.

Power loss in heat

Keep cool. Neodymium magnets are sensitive to heat. If you need resistance above 80°C, ask us about special high-temperature series (H, SH, UH).

GPS Danger

GPS units and smartphones are extremely susceptible to magnetism. Close proximity with a powerful NdFeB magnet can decalibrate the sensors in your phone.

Handling guide

Use magnets with awareness. Their huge power can shock even experienced users. Stay alert and do not underestimate their force.

Implant safety

People with a ICD have to maintain an large gap from magnets. The magnetism can interfere with the functioning of the life-saving device.

Avoid contact if allergic

Certain individuals suffer from a sensitization to nickel, which is the common plating for neodymium magnets. Prolonged contact can result in a rash. It is best to use protective gloves.

Serious injuries

Large magnets can break fingers in a fraction of a second. Do not place your hand between two strong magnets.

Electronic devices

Do not bring magnets close to a purse, laptop, or screen. The magnetism can irreversibly ruin these devices and erase data from cards.

Material brittleness

Protect your eyes. Magnets can explode upon violent connection, ejecting sharp fragments into the air. Eye protection is mandatory.

Security! Looking for details? Read our article: Why are neodymium magnets dangerous?