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MW 8x15 / N38 - cylindrical magnet

cylindrical magnet

Catalog no 010102

GTIN/EAN: 5906301811015

5.00

Diameter Ø

8 mm [±0,1 mm]

Height

15 mm [±0,1 mm]

Weight

5.65 g

Magnetization Direction

↑ axial

Load capacity

1.47 kg / 14.45 N

Magnetic Induction

598.12 mT / 5981 Gs

Coating

[NiCuNi] Nickel

3.44 with VAT / pcs + price for transport

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Technical details - MW 8x15 / N38 - cylindrical magnet

Specification / characteristics - MW 8x15 / N38 - cylindrical magnet

properties
properties values
Cat. no. 010102
GTIN/EAN 5906301811015
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 15 mm [±0,1 mm]
Weight 5.65 g
Magnetization Direction ↑ axial
Load capacity ~ ? 1.47 kg / 14.45 N
Magnetic Induction ~ ? 598.12 mT / 5981 Gs
Coating [NiCuNi] Nickel
Manufacturing Tolerance ±0.1 mm

Magnetic properties of material N38

Specification / characteristics MW 8x15 / 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 - report

The following information are the outcome of a physical simulation. Results were calculated on algorithms for the material Nd2Fe14B. Actual parameters may differ from theoretical values. Use these data as a supplementary guide during assembly planning.

Table 1: Static pull force (force vs gap) - power drop
MW 8x15 / N38

Distance (mm) Induction (Gauss) / mT Pull Force (kg/lbs/g/N) Risk Status
0 mm 5975 Gs
597.5 mT
1.47 kg / 3.24 pounds
1470.0 g / 14.4 N
low risk
1 mm 4511 Gs
451.1 mT
0.84 kg / 1.85 pounds
837.8 g / 8.2 N
low risk
2 mm 3262 Gs
326.2 mT
0.44 kg / 0.97 pounds
438.2 g / 4.3 N
low risk
3 mm 2332 Gs
233.2 mT
0.22 kg / 0.49 pounds
224.0 g / 2.2 N
low risk
5 mm 1238 Gs
123.8 mT
0.06 kg / 0.14 pounds
63.1 g / 0.6 N
low risk
10 mm 366 Gs
36.6 mT
0.01 kg / 0.01 pounds
5.5 g / 0.1 N
low risk
15 mm 155 Gs
15.5 mT
0.00 kg / 0.00 pounds
1.0 g / 0.0 N
low risk
20 mm 80 Gs
8.0 mT
0.00 kg / 0.00 pounds
0.3 g / 0.0 N
low risk
30 mm 30 Gs
3.0 mT
0.00 kg / 0.00 pounds
0.0 g / 0.0 N
low risk
50 mm 8 Gs
0.8 mT
0.00 kg / 0.00 pounds
0.0 g / 0.0 N
low risk

Table 2: Shear force (wall)
MW 8x15 / N38

Distance (mm) Friction coefficient Pull Force (kg/lbs/g/N)
0 mm Stal (~0.2) 0.29 kg / 0.65 pounds
294.0 g / 2.9 N
1 mm Stal (~0.2) 0.17 kg / 0.37 pounds
168.0 g / 1.6 N
2 mm Stal (~0.2) 0.09 kg / 0.19 pounds
88.0 g / 0.9 N
3 mm Stal (~0.2) 0.04 kg / 0.10 pounds
44.0 g / 0.4 N
5 mm Stal (~0.2) 0.01 kg / 0.03 pounds
12.0 g / 0.1 N
10 mm Stal (~0.2) 0.00 kg / 0.00 pounds
2.0 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

Table 3: Wall mounting (sliding) - behavior on slippery surfaces
MW 8x15 / N38

Surface type Friction coefficient / % Mocy Max load (kg/lbs/g/N)
Raw steel
µ = 0.3 30% Nominalnej Siły
0.44 kg / 0.97 pounds
441.0 g / 4.3 N
Painted steel (standard)
µ = 0.2 20% Nominalnej Siły
0.29 kg / 0.65 pounds
294.0 g / 2.9 N
Oily/slippery steel
µ = 0.1 10% Nominalnej Siły
0.15 kg / 0.32 pounds
147.0 g / 1.4 N
Magnet with anti-slip rubber
µ = 0.5 50% Nominalnej Siły
0.74 kg / 1.62 pounds
735.0 g / 7.2 N

Table 4: Steel thickness (substrate influence) - sheet metal selection
MW 8x15 / N38

Steel thickness (mm) % power Real pull force (kg/lbs/g/N)
0.5 mm
10%
0.15 kg / 0.32 pounds
147.0 g / 1.4 N
1 mm
25%
0.37 kg / 0.81 pounds
367.5 g / 3.6 N
2 mm
50%
0.74 kg / 1.62 pounds
735.0 g / 7.2 N
3 mm
75%
1.10 kg / 2.43 pounds
1102.5 g / 10.8 N
5 mm
100%
1.47 kg / 3.24 pounds
1470.0 g / 14.4 N
10 mm
100%
1.47 kg / 3.24 pounds
1470.0 g / 14.4 N
11 mm
100%
1.47 kg / 3.24 pounds
1470.0 g / 14.4 N
12 mm
100%
1.47 kg / 3.24 pounds
1470.0 g / 14.4 N

Table 5: Thermal resistance (stability) - thermal limit
MW 8x15 / N38

Ambient temp. (°C) Power loss Remaining pull (kg/lbs/g/N) Status
20 °C 0.0% 1.47 kg / 3.24 pounds
1470.0 g / 14.4 N
OK
40 °C -2.2% 1.44 kg / 3.17 pounds
1437.7 g / 14.1 N
OK
60 °C -4.4% 1.41 kg / 3.10 pounds
1405.3 g / 13.8 N
OK
80 °C -6.6% 1.37 kg / 3.03 pounds
1373.0 g / 13.5 N
100 °C -28.8% 1.05 kg / 2.31 pounds
1046.6 g / 10.3 N

Table 6: Two magnets (repulsion) - field collision
MW 8x15 / N38

Gap (mm) Attraction (kg/lbs) (N-S) Lateral Force (kg/lbs/g/N) Repulsion (kg/lbs) (N-N)
0 mm 11.06 kg / 24.39 pounds
6 130 Gs
1.66 kg / 3.66 pounds
1660 g / 16.3 N
N/A
1 mm 8.49 kg / 18.72 pounds
10 469 Gs
1.27 kg / 2.81 pounds
1274 g / 12.5 N
7.64 kg / 16.85 pounds
~0 Gs
2 mm 6.31 kg / 13.90 pounds
9 022 Gs
0.95 kg / 2.09 pounds
946 g / 9.3 N
5.68 kg / 12.51 pounds
~0 Gs
3 mm 4.59 kg / 10.12 pounds
7 697 Gs
0.69 kg / 1.52 pounds
688 g / 6.8 N
4.13 kg / 9.11 pounds
~0 Gs
5 mm 2.36 kg / 5.20 pounds
5 516 Gs
0.35 kg / 0.78 pounds
354 g / 3.5 N
2.12 kg / 4.68 pounds
~0 Gs
10 mm 0.48 kg / 1.05 pounds
2 476 Gs
0.07 kg / 0.16 pounds
71 g / 0.7 N
0.43 kg / 0.94 pounds
~0 Gs
20 mm 0.04 kg / 0.09 pounds
731 Gs
0.01 kg / 0.01 pounds
6 g / 0.1 N
0.04 kg / 0.08 pounds
~0 Gs
50 mm 0.00 kg / 0.00 pounds
94 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
60 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
41 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
29 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
21 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
16 Gs
0.00 kg / 0.00 pounds
0 g / 0.0 N
0.00 kg / 0.00 pounds
~0 Gs

Table 7: Safety (HSE) (implants) - warnings
MW 8x15 / N38

Object / Device Limit (Gauss) / mT Safe distance
Pacemaker 5 Gs (0.5 mT) 6.0 cm
Hearing aid 10 Gs (1.0 mT) 5.0 cm
Timepiece 20 Gs (2.0 mT) 4.0 cm
Phone / Smartphone 40 Gs (4.0 mT) 3.0 cm
Car key 50 Gs (5.0 mT) 2.5 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 (cracking risk) - warning
MW 8x15 / N38

Start from (mm) Speed (km/h) Energy (J) Predicted outcome
10 mm 16.31 km/h
(4.53 m/s)
0.06 J
30 mm 28.18 km/h
(7.83 m/s)
0.17 J
50 mm 36.37 km/h
(10.10 m/s)
0.29 J
100 mm 51.44 km/h
(14.29 m/s)
0.58 J

Table 9: Anti-corrosion coating durability
MW 8x15 / 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 8x15 / N38

Parameter Value SI Unit / Description
Magnetic Flux 3 306 Mx 33.1 µWb
Pc Coefficient 1.19 High (Stable)

Table 11: Physics of underwater searching
MW 8x15 / N38

Environment Effective steel pull Effect
Air (land) 1.47 kg Standard
Water (riverbed) 1.68 kg
(+0.21 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.
1. Vertical hold

*Warning: On a vertical surface, the magnet holds only ~20% of its nominal pull.

2. Plate thickness effect

*Thin metal sheet (e.g. computer case) drastically weakens the holding force.

3. Heat tolerance

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

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

chart generated for the permeance coefficient Pc (Permeance Coefficient) = 1.19

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.

Engineering data and GPSR
Material specification
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: 010102-2026
Magnet Unit Converter
Magnet pull force

Field Strength

Other products

This product is a very strong cylindrical magnet, composed of modern NdFeB material, which, with dimensions of Ø8x15 mm, guarantees maximum efficiency. The MW 8x15 / N38 model boasts high dimensional repeatability and industrial build quality, making it an ideal solution for professional engineers and designers. As a magnetic rod with significant force (approx. 1.47 kg), this product is available off-the-shelf from our European logistics center, ensuring rapid order fulfillment. Furthermore, its triple-layer Ni-Cu-Ni coating secures it against corrosion in typical operating conditions, ensuring an aesthetic appearance and durability for years.
It successfully proves itself in modeling, advanced automation, and broadly understood industry, serving as a fastening or actuating element. Thanks to the high power of 14.45 N with a weight of only 5.65 g, this cylindrical magnet is indispensable in electronics and wherever every gram matters.
Since our magnets have a tolerance of ±0.1mm, the best method is to glue them into holes with a slightly larger diameter (e.g., 8.1 mm) using epoxy glues. To ensure stability in automation, specialized industrial adhesives are used, which are safe for nickel and fill the gap, guaranteeing durability of the connection.
Grade N38 is the most frequently chosen standard for professional neodymium magnets, offering a great economic balance and high resistance to demagnetization. If you need the strongest magnets in the same volume (Ø8x15), 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 Ø8x15 mm, which, at a weight of 5.65 g, makes it an element with high magnetic energy density. The key parameter here is the lifting capacity amounting to approximately 1.47 kg (force ~14.45 N), which, with such defined dimensions, proves the high power of the NdFeB material. The product has a [NiCuNi] coating, which secures it against external factors, 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 and cons of Nd2Fe14B magnets.

Advantages

In addition to their magnetic efficiency, neodymium magnets provide the following advantages:
  • They have unchanged lifting capacity, and over more than 10 years their performance decreases symbolically – ~1% (in testing),
  • Neodymium magnets remain remarkably resistant to demagnetization caused by external field sources,
  • By covering with a reflective layer of nickel, the element acquires an modern look,
  • The surface of neodymium magnets generates a maximum magnetic field – this is one of their assets,
  • Made from properly selected components, these magnets show impressive resistance to high heat, enabling them to function (depending on their form) at temperatures up to 230°C and above...
  • Possibility of accurate modeling as well as adapting to precise needs,
  • Huge importance in modern industrial fields – they are commonly used in computer drives, brushless drives, medical equipment, as well as complex engineering applications.
  • Compactness – despite small sizes they offer powerful magnetic field, making them ideal for precision applications

Weaknesses

Disadvantages of NdFeB magnets:
  • They are prone to damage upon heavy impacts. To avoid cracks, it is worth securing magnets using a steel holder. Such protection not only protects the magnet but also increases its resistance to damage
  • NdFeB magnets demagnetize when exposed to high temperatures. After reaching 80°C, many of them experience permanent drop of strength (a factor is the shape as well as dimensions of the magnet). We offer magnets specially adapted to work at temperatures up to 230°C marked [AH], which are extremely resistant to heat
  • When exposed to humidity, magnets usually rust. To use them in conditions outside, it is recommended to use protective magnets, such as magnets in rubber or plastics, which secure oxidation as well as corrosion.
  • We suggest cover - magnetic mount, due to difficulties in creating threads inside the magnet and complicated shapes.
  • Possible danger related to microscopic parts of magnets can be dangerous, when accidentally swallowed, which is particularly important in the context of child safety. Furthermore, tiny parts of these devices are able to be problematic in diagnostics medical after entering the body.
  • Due to expensive raw materials, their price is higher than average,

Pull force analysis

Maximum lifting force for a neodymium magnet – what affects it?

The declared magnet strength represents the peak performance, measured under optimal environment, specifically:
  • with the use of a yoke made of special test steel, ensuring maximum field concentration
  • with a cross-section of at least 10 mm
  • characterized by lack of roughness
  • under conditions of ideal adhesion (surface-to-surface)
  • under vertical force vector (90-degree angle)
  • at ambient temperature room level

Practical aspects of lifting capacity – factors

In practice, the actual holding force depends on a number of factors, listed from crucial:
  • Space between magnet and steel – every millimeter of separation (caused e.g. by veneer or dirt) drastically reduces the magnet efficiency, often by half at just 0.5 mm.
  • Pull-off angle – note that the magnet holds strongest perpendicularly. Under sliding down, the holding force drops significantly, often to levels of 20-30% of the nominal value.
  • Steel thickness – insufficiently thick plate does not close the flux, causing part of the flux to be escaped to the other side.
  • Metal type – different alloys attracts identically. High carbon content weaken the interaction with the magnet.
  • Surface finish – ideal contact is possible only on polished steel. Any scratches and bumps create air cushions, weakening the magnet.
  • Temperature – temperature increase causes a temporary drop of induction. Check the thermal limit for a given model.

Lifting capacity testing was conducted on a smooth plate of suitable thickness, under perpendicular forces, in contrast under shearing force the load capacity is reduced by as much as fivefold. Moreover, even a minimal clearance between the magnet and the plate reduces the load capacity.

Precautions when working with NdFeB magnets
This is not a toy

These products are not toys. Eating multiple magnets can lead to them attracting across intestines, which constitutes a direct threat to life and necessitates urgent medical intervention.

Risk of cracking

Watch out for shards. Magnets can explode upon uncontrolled impact, ejecting shards into the air. Wear goggles.

Warning for allergy sufferers

Studies show that the nickel plating (the usual finish) is a common allergen. If you have an allergy, refrain from direct skin contact and select versions in plastic housing.

Powerful field

Be careful. Neodymium magnets act from a distance and snap with huge force, often faster than you can react.

Safe distance

Device Safety: Neodymium magnets can ruin payment cards and delicate electronics (pacemakers, hearing aids, timepieces).

Life threat

Medical warning: Neodymium magnets can turn off pacemakers and defibrillators. Stay away if you have electronic implants.

Combustion hazard

Mechanical processing of NdFeB material poses a fire hazard. Neodymium dust reacts violently with oxygen and is difficult to extinguish.

Bone fractures

Danger of trauma: The attraction force is so great that it can cause hematomas, crushing, and even bone fractures. Protective gloves are recommended.

Keep away from electronics

GPS units and smartphones are extremely susceptible to magnetic fields. Direct contact with a strong magnet can ruin the internal compass in your phone.

Operating temperature

Regular neodymium magnets (grade N) undergo demagnetization when the temperature goes above 80°C. This process is irreversible.

Attention! More info about risks in the article: Magnet Safety Guide.