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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

2.80 ZŁ net + 23% VAT / pcs

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Technical of the product - 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

Technical analysis of the product - report

The following values constitute the outcome of a physical simulation. Results are based on algorithms for the class Nd2Fe14B. Real-world performance might slightly differ. Use these data as a preliminary roadmap during assembly planning.

Table 1: Static 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 LBS
1470.0 g / 14.4 N
weak grip
1 mm 4511 Gs
451.1 mT
0.84 kg / 1.85 LBS
837.8 g / 8.2 N
weak grip
2 mm 3262 Gs
326.2 mT
0.44 kg / 0.97 LBS
438.2 g / 4.3 N
weak grip
3 mm 2332 Gs
233.2 mT
0.22 kg / 0.49 LBS
224.0 g / 2.2 N
weak grip
5 mm 1238 Gs
123.8 mT
0.06 kg / 0.14 LBS
63.1 g / 0.6 N
weak grip
10 mm 366 Gs
36.6 mT
0.01 kg / 0.01 LBS
5.5 g / 0.1 N
weak grip
15 mm 155 Gs
15.5 mT
0.00 kg / 0.00 LBS
1.0 g / 0.0 N
weak grip
20 mm 80 Gs
8.0 mT
0.00 kg / 0.00 LBS
0.3 g / 0.0 N
weak grip
30 mm 30 Gs
3.0 mT
0.00 kg / 0.00 LBS
0.0 g / 0.0 N
weak grip
50 mm 8 Gs
0.8 mT
0.00 kg / 0.00 LBS
0.0 g / 0.0 N
weak grip

Table 2: Slippage force (vertical surface)
MW 8x15 / N38

Distance (mm) Friction coefficient Pull Force (kg/lbs/g/N)
0 mm Stal (~0.2) 0.29 kg / 0.65 LBS
294.0 g / 2.9 N
1 mm Stal (~0.2) 0.17 kg / 0.37 LBS
168.0 g / 1.6 N
2 mm Stal (~0.2) 0.09 kg / 0.19 LBS
88.0 g / 0.9 N
3 mm Stal (~0.2) 0.04 kg / 0.10 LBS
44.0 g / 0.4 N
5 mm Stal (~0.2) 0.01 kg / 0.03 LBS
12.0 g / 0.1 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 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 LBS
441.0 g / 4.3 N
Painted steel (standard)
µ = 0.2 20% Nominalnej Siły
0.29 kg / 0.65 LBS
294.0 g / 2.9 N
Oily/slippery steel
µ = 0.1 10% Nominalnej Siły
0.15 kg / 0.32 LBS
147.0 g / 1.4 N
Magnet with anti-slip rubber
µ = 0.5 50% Nominalnej Siły
0.74 kg / 1.62 LBS
735.0 g / 7.2 N

Table 4: Material efficiency (saturation) - power losses
MW 8x15 / N38

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

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

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

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

Table 7: Protective zones (electronics) - precautionary measures
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
Mechanical watch 20 Gs (2.0 mT) 4.0 cm
Phone / Smartphone 40 Gs (4.0 mT) 3.0 cm
Remote 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: Surface protection spec
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: Electrical data (Flux)
MW 8x15 / N38

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

Table 11: Submerged application
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%
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. Wall mount (shear)

*Note: On a vertical wall, the magnet holds just a fraction of its max power.

2. Steel thickness impact

*Thin steel (e.g. 0.5mm PC case) drastically weakens the holding force.

3. Thermal stability

*For standard magnets, the max working temp 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.

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%
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
Pulling force

Field Strength

Other offers

The offered product is an incredibly powerful rod magnet, composed of advanced NdFeB material, which, with dimensions of Ø8x15 mm, guarantees maximum efficiency. The MW 8x15 / N38 model boasts a tolerance of ±0.1mm and professional build quality, making it an excellent solution for professional engineers and designers. As a magnetic rod with impressive 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 effectively protects it against corrosion in typical 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 positioning or actuating element. Thanks to the high power of 14.45 N with a weight of only 5.65 g, this rod is indispensable in miniature devices and wherever every gram matters.
Since our magnets have a very precise dimensions, the recommended way is to glue them into holes with a slightly larger diameter (e.g., 8.1 mm) using epoxy glues. To ensure stability in automation, anaerobic resins are used, which do not react with the nickel coating and fill the gap, guaranteeing high repeatability of the connection.
Magnets 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 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 warehouse.
This model is characterized by dimensions Ø8x15 mm, which, at a weight of 5.65 g, makes it an element with impressive 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 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 diametrically if your project requires it.

Pros as well as cons of Nd2Fe14B magnets.

Benefits

Besides their magnetic performance, neodymium magnets are valued for these benefits:
  • They virtually do not lose strength, because even after 10 years the decline in efficiency is only ~1% (in laboratory conditions),
  • They have excellent resistance to magnetic field loss when exposed to external magnetic sources,
  • A magnet with a shiny nickel surface has an effective appearance,
  • Magnets are characterized by maximum magnetic induction on the surface,
  • Neodymium magnets are characterized by very high magnetic induction on the magnet surface and can function (depending on the shape) even at a temperature of 230°C or more...
  • Thanks to the ability of accurate molding and adaptation to custom requirements, neodymium magnets can be created in a variety of geometric configurations, which makes them more universal,
  • Key role in innovative solutions – they are commonly used in mass storage devices, drive modules, medical equipment, and technologically advanced constructions.
  • Thanks to efficiency per cm³, small magnets offer high operating force, in miniature format,

Weaknesses

Drawbacks and weaknesses of neodymium magnets and proposals for their use:
  • Brittleness is one of their disadvantages. Upon strong impact they can break. We recommend keeping them in a strong case, which not only protects them against impacts but also raises their durability
  • We warn that neodymium magnets can reduce their strength at high temperatures. To prevent this, we recommend our specialized [AH] magnets, which work effectively even at 230°C.
  • Magnets exposed to a humid environment can corrode. Therefore when using outdoors, we advise using water-impermeable magnets made of rubber, plastic or other material protecting against moisture
  • Limited ability of creating nuts in the magnet and complex shapes - preferred is a housing - magnetic holder.
  • Potential hazard to health – tiny shards of magnets can be dangerous, in case of ingestion, which gains importance in the context of child health protection. It is also worth noting that small elements of these devices can disrupt the diagnostic process medical after entering the body.
  • High unit price – neodymium magnets have a higher price than other types of magnets (e.g. ferrite), which hinders application in large quantities

Pull force analysis

Highest magnetic holding forcewhat contributes to it?

Information about lifting capacity was defined for ideal contact conditions, taking into account:
  • with the contact of a yoke made of low-carbon steel, ensuring maximum field concentration
  • possessing a massiveness of min. 10 mm to ensure full flux closure
  • characterized by even structure
  • without the slightest insulating layer between the magnet and steel
  • for force acting at a right angle (pull-off, not shear)
  • at temperature approx. 20 degrees Celsius

Lifting capacity in practice – influencing factors

It is worth knowing that the working load may be lower influenced by the following factors, in order of importance:
  • Gap (betwixt the magnet and the plate), because even a very small distance (e.g. 0.5 mm) leads to a decrease in force by up to 50% (this also applies to paint, corrosion or debris).
  • Force direction – note that the magnet has greatest strength perpendicularly. Under shear forces, the capacity drops drastically, often to levels of 20-30% of the nominal value.
  • Element thickness – to utilize 100% power, the steel must be adequately massive. Paper-thin metal limits the lifting capacity (the magnet "punches through" it).
  • Plate material – mild steel gives the best results. Alloy admixtures lower magnetic permeability and holding force.
  • Smoothness – full contact is possible only on smooth steel. Rough texture reduce the real contact area, weakening the magnet.
  • Heat – neodymium magnets have a sensitivity to temperature. When it is hot they are weaker, and at low temperatures gain strength (up to a certain limit).

Holding force was checked on the plate surface of 20 mm thickness, when the force acted perpendicularly, in contrast under attempts to slide the magnet the holding force is lower. Moreover, even a small distance between the magnet’s surface and the plate lowers the lifting capacity.

Warnings
Sensitization to coating

Allergy Notice: The Ni-Cu-Ni coating contains nickel. If an allergic reaction appears, immediately stop handling magnets and wear gloves.

Electronic devices

Do not bring magnets close to a wallet, computer, or TV. The magnetic field can irreversibly ruin these devices and wipe information from cards.

Bone fractures

Large magnets can smash fingers in a fraction of a second. Never put your hand between two strong magnets.

Adults only

These products are not suitable for play. Swallowing several magnets may result in them pinching intestinal walls, which poses a severe health hazard and necessitates immediate surgery.

Protective goggles

Despite the nickel coating, the material is brittle and cannot withstand shocks. Do not hit, as the magnet may crumble into sharp, dangerous pieces.

Compass and GPS

An intense magnetic field interferes with the functioning of compasses in phones and navigation systems. Do not bring magnets close to a device to prevent breaking the sensors.

Conscious usage

Before starting, check safety instructions. Uncontrolled attraction can destroy the magnet or injure your hand. Think ahead.

Medical interference

Medical warning: Strong magnets can turn off heart devices and defibrillators. Do not approach if you have medical devices.

Heat sensitivity

Standard neodymium magnets (grade N) lose power when the temperature surpasses 80°C. Damage is permanent.

Combustion hazard

Combustion risk: Neodymium dust is explosive. Do not process magnets without safety gear as this risks ignition.

Safety First! Details about risks in the article: Magnet Safety Guide.