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MW 9x3 / N38 - cylindrical magnet

cylindrical magnet

Catalog no 010108

GTIN/EAN: 5906301811077

5.00

Diameter Ø

9 mm [±0,1 mm]

Height

3 mm [±0,1 mm]

Weight

1.43 g

Magnetization Direction

↑ axial

Load capacity

1.94 kg / 18.99 N

Magnetic Induction

343.55 mT / 3436 Gs

Coating

[NiCuNi] Nickel

1.132 with VAT / pcs + price for transport

0.920 ZŁ net + 23% VAT / pcs

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Product card - MW 9x3 / N38 - cylindrical magnet

Specification / characteristics - MW 9x3 / N38 - cylindrical magnet

properties
properties values
Cat. no. 010108
GTIN/EAN 5906301811077
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 9 mm [±0,1 mm]
Height 3 mm [±0,1 mm]
Weight 1.43 g
Magnetization Direction ↑ axial
Load capacity ~ ? 1.94 kg / 18.99 N
Magnetic Induction ~ ? 343.55 mT / 3436 Gs
Coating [NiCuNi] Nickel
Manufacturing Tolerance ±0.1 mm

Magnetic properties of material N38

Specification / characteristics MW 9x3 / 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 - technical parameters

The following data constitute the result of a physical analysis. Results are based on models for the material Nd2Fe14B. Operational parameters might slightly deviate from the simulation results. Treat these data as a reference point during assembly planning.

Table 1: Static pull force (force vs gap) - power drop
MW 9x3 / N38

Distance (mm) Induction (Gauss) / mT Pull Force (kg/lbs/g/N) Risk Status
0 mm 3433 Gs
343.3 mT
1.94 kg / 4.28 pounds
1940.0 g / 19.0 N
low risk
1 mm 2774 Gs
277.4 mT
1.27 kg / 2.79 pounds
1266.5 g / 12.4 N
low risk
2 mm 2090 Gs
209.0 mT
0.72 kg / 1.59 pounds
719.2 g / 7.1 N
low risk
3 mm 1521 Gs
152.1 mT
0.38 kg / 0.84 pounds
380.7 g / 3.7 N
low risk
5 mm 795 Gs
79.5 mT
0.10 kg / 0.23 pounds
104.1 g / 1.0 N
low risk
10 mm 205 Gs
20.5 mT
0.01 kg / 0.02 pounds
6.9 g / 0.1 N
low risk
15 mm 76 Gs
7.6 mT
0.00 kg / 0.00 pounds
1.0 g / 0.0 N
low risk
20 mm 36 Gs
3.6 mT
0.00 kg / 0.00 pounds
0.2 g / 0.0 N
low risk
30 mm 12 Gs
1.2 mT
0.00 kg / 0.00 pounds
0.0 g / 0.0 N
low risk
50 mm 3 Gs
0.3 mT
0.00 kg / 0.00 pounds
0.0 g / 0.0 N
low risk

Table 2: Shear capacity (wall)
MW 9x3 / N38

Distance (mm) Friction coefficient Pull Force (kg/lbs/g/N)
0 mm Stal (~0.2) 0.39 kg / 0.86 pounds
388.0 g / 3.8 N
1 mm Stal (~0.2) 0.25 kg / 0.56 pounds
254.0 g / 2.5 N
2 mm Stal (~0.2) 0.14 kg / 0.32 pounds
144.0 g / 1.4 N
3 mm Stal (~0.2) 0.08 kg / 0.17 pounds
76.0 g / 0.7 N
5 mm Stal (~0.2) 0.02 kg / 0.04 pounds
20.0 g / 0.2 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) - vertical pull
MW 9x3 / N38

Surface type Friction coefficient / % Mocy Max load (kg/lbs/g/N)
Raw steel
µ = 0.3 30% Nominalnej Siły
0.58 kg / 1.28 pounds
582.0 g / 5.7 N
Painted steel (standard)
µ = 0.2 20% Nominalnej Siły
0.39 kg / 0.86 pounds
388.0 g / 3.8 N
Oily/slippery steel
µ = 0.1 10% Nominalnej Siły
0.19 kg / 0.43 pounds
194.0 g / 1.9 N
Magnet with anti-slip rubber
µ = 0.5 50% Nominalnej Siły
0.97 kg / 2.14 pounds
970.0 g / 9.5 N

Table 4: Material efficiency (saturation) - sheet metal selection
MW 9x3 / N38

Steel thickness (mm) % power Real pull force (kg/lbs/g/N)
0.5 mm
10%
0.19 kg / 0.43 pounds
194.0 g / 1.9 N
1 mm
25%
0.49 kg / 1.07 pounds
485.0 g / 4.8 N
2 mm
50%
0.97 kg / 2.14 pounds
970.0 g / 9.5 N
3 mm
75%
1.46 kg / 3.21 pounds
1455.0 g / 14.3 N
5 mm
100%
1.94 kg / 4.28 pounds
1940.0 g / 19.0 N
10 mm
100%
1.94 kg / 4.28 pounds
1940.0 g / 19.0 N
11 mm
100%
1.94 kg / 4.28 pounds
1940.0 g / 19.0 N
12 mm
100%
1.94 kg / 4.28 pounds
1940.0 g / 19.0 N

Table 5: Thermal resistance (material behavior) - power drop
MW 9x3 / N38

Ambient temp. (°C) Power loss Remaining pull (kg/lbs/g/N) Status
20 °C 0.0% 1.94 kg / 4.28 pounds
1940.0 g / 19.0 N
OK
40 °C -2.2% 1.90 kg / 4.18 pounds
1897.3 g / 18.6 N
OK
60 °C -4.4% 1.85 kg / 4.09 pounds
1854.6 g / 18.2 N
80 °C -6.6% 1.81 kg / 3.99 pounds
1812.0 g / 17.8 N
100 °C -28.8% 1.38 kg / 3.05 pounds
1381.3 g / 13.6 N

Table 6: Magnet-Magnet interaction (repulsion) - field range
MW 9x3 / N38

Gap (mm) Attraction (kg/lbs) (N-S) Lateral Force (kg/lbs/g/N) Repulsion (kg/lbs) (N-N)
0 mm 4.62 kg / 10.19 pounds
4 949 Gs
0.69 kg / 1.53 pounds
693 g / 6.8 N
N/A
1 mm 3.82 kg / 8.43 pounds
6 244 Gs
0.57 kg / 1.26 pounds
573 g / 5.6 N
3.44 kg / 7.58 pounds
~0 Gs
2 mm 3.02 kg / 6.65 pounds
5 548 Gs
0.45 kg / 1.00 pounds
453 g / 4.4 N
2.72 kg / 5.99 pounds
~0 Gs
3 mm 2.30 kg / 5.08 pounds
4 847 Gs
0.35 kg / 0.76 pounds
346 g / 3.4 N
2.07 kg / 4.57 pounds
~0 Gs
5 mm 1.25 kg / 2.76 pounds
3 575 Gs
0.19 kg / 0.41 pounds
188 g / 1.8 N
1.13 kg / 2.49 pounds
~0 Gs
10 mm 0.25 kg / 0.55 pounds
1 591 Gs
0.04 kg / 0.08 pounds
37 g / 0.4 N
0.22 kg / 0.49 pounds
~0 Gs
20 mm 0.02 kg / 0.04 pounds
410 Gs
0.00 kg / 0.01 pounds
2 g / 0.0 N
0.01 kg / 0.03 pounds
~0 Gs
50 mm 0.00 kg / 0.00 pounds
39 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
23 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
15 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
10 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
7 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
5 Gs
0.00 kg / 0.00 pounds
0 g / 0.0 N
0.00 kg / 0.00 pounds
~0 Gs

Table 7: Hazards (implants) - warnings
MW 9x3 / N38

Object / Device Limit (Gauss) / mT Safe distance
Pacemaker 5 Gs (0.5 mT) 4.5 cm
Hearing aid 10 Gs (1.0 mT) 3.5 cm
Timepiece 20 Gs (2.0 mT) 2.5 cm
Phone / Smartphone 40 Gs (4.0 mT) 2.0 cm
Remote 50 Gs (5.0 mT) 2.0 cm
Payment card 400 Gs (40.0 mT) 1.0 cm
HDD hard drive 600 Gs (60.0 mT) 1.0 cm

Table 8: Dynamics (cracking risk) - collision effects
MW 9x3 / N38

Start from (mm) Speed (km/h) Energy (J) Predicted outcome
10 mm 37.23 km/h
(10.34 m/s)
0.08 J
30 mm 64.34 km/h
(17.87 m/s)
0.23 J
50 mm 83.06 km/h
(23.07 m/s)
0.38 J
100 mm 117.47 km/h
(32.63 m/s)
0.76 J

Table 9: Corrosion resistance
MW 9x3 / 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 (Pc)
MW 9x3 / N38

Parameter Value SI Unit / Description
Magnetic Flux 2 314 Mx 23.1 µWb
Pc Coefficient 0.44 Low (Flat)

Table 11: Submerged application
MW 9x3 / N38

Environment Effective steel pull Effect
Air (land) 1.94 kg Standard
Water (riverbed) 2.22 kg
(+0.28 kg buoyancy gain)
+14.5%
Rust risk: This magnet has a standard nickel coating. After use in water, it must be dried and maintained immediately, otherwise it will rust!
1. Wall mount (shear)

*Caution: On a vertical wall, the magnet holds just approx. 20-30% of its nominal pull.

2. Steel thickness impact

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

3. Thermal stability

*For standard magnets, the safety limit is 80°C.

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

chart generated for the permeance coefficient Pc (Permeance Coefficient) = 0.44

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
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: 010108-2026
Quick Unit Converter
Pulling force

Magnetic Field

Other deals

The presented product is an extremely powerful rod magnet, produced from durable NdFeB material, which, at dimensions of Ø9x3 mm, guarantees the highest energy density. The MW 9x3 / N38 model features a tolerance of ±0.1mm and industrial build quality, making it an ideal solution for the most demanding engineers and designers. As a magnetic rod with impressive force (approx. 1.94 kg), this product is in stock from our European logistics center, ensuring rapid order fulfillment. Additionally, its Ni-Cu-Ni coating shields it against corrosion in typical operating conditions, guaranteeing an aesthetic appearance and durability for years.
This model is perfect for building electric motors, advanced Hall effect sensors, and efficient magnetic separators, where field concentration on a small surface counts. Thanks to the high power of 18.99 N with a weight of only 1.43 g, this rod is indispensable in electronics and wherever every gram matters.
Due to the delicate structure of the ceramic sinter, we absolutely advise against force-fitting (so-called press-fit), as this risks chipping the coating 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 professional neodymium magnets, offering a great economic balance and high resistance to demagnetization. If you need even stronger magnets in the same volume (Ø9x3), contact us regarding higher grades (e.g., N50, N52), however, N38 is the standard in continuous sale in our store.
The presented product is a neodymium magnet with precisely defined parameters: diameter 9 mm and height 3 mm. The key parameter here is the holding force amounting to approximately 1.94 kg (force ~18.99 N), which, with such compact 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.
This cylinder is magnetized axially (along the height of 3 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 diametrically if your project requires it.

Strengths as well as weaknesses of Nd2Fe14B magnets.

Strengths

Besides their magnetic performance, neodymium magnets are valued for these benefits:
  • They do not lose strength, even after nearly 10 years – the reduction in power is only ~1% (theoretically),
  • They show high resistance to demagnetization induced by external disturbances,
  • The use of an aesthetic coating of noble metals (nickel, gold, silver) causes the element to look better,
  • The surface of neodymium magnets generates a intense magnetic field – this is a key feature,
  • Thanks to resistance to high temperature, they can operate (depending on the form) even at temperatures up to 230°C and higher...
  • Thanks to versatility in shaping and the capacity to modify to client solutions,
  • Key role in innovative solutions – they find application in magnetic memories, electric motors, medical equipment, as well as modern systems.
  • Thanks to concentrated force, small magnets offer high operating force, in miniature format,

Weaknesses

Disadvantages of NdFeB magnets:
  • Susceptibility to cracking is one of their disadvantages. Upon strong impact they can break. We advise keeping them in a special holder, which not only secures them against impacts but also increases their durability
  • Neodymium magnets decrease their strength under the influence of heating. As soon as 80°C is exceeded, many of them start losing their power. 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 suggest using waterproof magnets made of rubber, plastic or other material resistant to moisture, when using outdoors
  • Limited possibility of producing threads in the magnet and complex forms - recommended is cover - magnetic holder.
  • Health risk resulting from small fragments of magnets can be dangerous, if swallowed, which becomes key in the aspect of protecting the youngest. Additionally, tiny parts of these products can be problematic in diagnostics medical in case of swallowing.
  • Higher cost of purchase is one of the disadvantages compared to ceramic magnets, especially in budget applications

Pull force analysis

Maximum lifting capacity of the magnetwhat affects it?

The load parameter shown concerns the limit force, obtained under laboratory conditions, specifically:
  • with the contact of a yoke made of special test steel, guaranteeing full magnetic saturation
  • whose thickness reaches at least 10 mm
  • characterized by lack of roughness
  • under conditions of no distance (metal-to-metal)
  • during pulling in a direction vertical to the mounting surface
  • at room temperature

Determinants of lifting force in real conditions

In real-world applications, the real power depends on many variables, ranked from most significant:
  • Gap between surfaces – even a fraction of a millimeter of distance (caused e.g. by varnish or unevenness) diminishes the pulling force, often by half at just 0.5 mm.
  • Force direction – note that the magnet holds strongest perpendicularly. Under sliding down, the holding force drops drastically, often to levels of 20-30% of the nominal value.
  • 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.
  • Material type – ideal substrate is pure iron steel. Hardened steels may attract less.
  • Base smoothness – the more even the plate, the larger the contact zone and higher the lifting capacity. Roughness creates an air distance.
  • Thermal environment – temperature increase results in weakening of induction. It is worth remembering the maximum operating temperature for a given model.

Lifting capacity testing was conducted on a smooth plate of suitable thickness, under a perpendicular pulling force, in contrast under parallel forces the holding force is lower. Moreover, even a slight gap between the magnet and the plate lowers the lifting capacity.

Safe handling of neodymium magnets
Fire warning

Dust generated during machining of magnets is combustible. Avoid drilling into magnets without proper cooling and knowledge.

Finger safety

Danger of trauma: The attraction force is so great that it can cause hematomas, crushing, and broken bones. Use thick gloves.

GPS and phone interference

Note: rare earth magnets produce a field that disrupts sensitive sensors. Maintain a separation from your phone, tablet, and navigation systems.

Nickel allergy

A percentage of the population experience a hypersensitivity to nickel, which is the typical protective layer for neodymium magnets. Extended handling can result in dermatitis. It is best to use protective gloves.

Life threat

Individuals with a pacemaker have to keep an absolute distance from magnets. The magnetism can disrupt the functioning of the life-saving device.

Do not underestimate power

Use magnets with awareness. Their immense force can shock even experienced users. Plan your moves and do not underestimate their power.

Permanent damage

Standard neodymium magnets (N-type) lose magnetization when the temperature goes above 80°C. The loss of strength is permanent.

Cards and drives

Do not bring magnets near a wallet, computer, or screen. The magnetic field can permanently damage these devices and wipe information from cards.

Eye protection

NdFeB magnets are ceramic materials, which means they are very brittle. Clashing of two magnets leads to them shattering into small pieces.

Do not give to children

Only for adults. Small elements pose a choking risk, leading to intestinal necrosis. Store out of reach of children and animals.

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