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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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Physical properties - 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

Presented values represent the direct effect of a engineering analysis. Values rely on algorithms for the material Nd2Fe14B. Actual conditions may differ. Please consider these calculations as a supplementary guide during assembly planning.

Table 1: Static pull force (pull vs gap) - interaction chart
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 hold (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) - behavior on slippery surfaces
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: Steel thickness (saturation) - power losses
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: Working in heat (stability) - resistance threshold
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 (attraction) - forces in the system
MW 9x3 / N38

Gap (mm) Attraction (kg/lbs) (N-S) Shear Strength (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) - precautionary measures
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
Mobile device 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: Collisions (kinetic energy) - warning
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: Anti-corrosion coating durability
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: Construction data (Flux)
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%
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. Shear force

*Warning: On a vertical surface, the magnet holds only approx. 20-30% of its nominal pull.

2. Plate thickness effect

*Thin metal sheet (e.g. 0.5mm PC case) severely reduces 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) = 0.44

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.

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%
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: 010108-2026
Quick Unit Converter
Pulling force

Magnetic Field

View also proposals

The presented product is an extremely powerful cylindrical magnet, composed of advanced NdFeB material, which, with dimensions of Ø9x3 mm, guarantees the highest energy density. This specific item boasts a tolerance of ±0.1mm and industrial build quality, making it an ideal solution for professional engineers and designers. As a magnetic rod with significant force (approx. 1.94 kg), this product is in stock from our warehouse in Poland, ensuring rapid order fulfillment. Additionally, its triple-layer Ni-Cu-Ni coating shields it against corrosion in typical operating conditions, ensuring an aesthetic appearance and durability for years.
It finds application in modeling, advanced robotics, and broadly understood industry, serving as a fastening or actuating element. 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 low weight is crucial.
Since our magnets have a tolerance of ±0.1mm, the recommended way is to glue them into holes with a slightly larger diameter (e.g., 9.1 mm) using two-component epoxy glues. To ensure stability in automation, anaerobic resins are used, which are safe for nickel and fill the gap, guaranteeing high repeatability of the connection.
Grade N38 is the most frequently chosen standard for industrial neodymium magnets, offering a great economic balance and operational stability. 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 available off-the-shelf in our warehouse.
This model is characterized by dimensions Ø9x3 mm, which, at a weight of 1.43 g, makes it an element with high magnetic energy density. The key parameter here is the holding force amounting to approximately 1.94 kg (force ~18.99 N), which, with such defined dimensions, proves the high power of the NdFeB material. The product has a [NiCuNi] coating, which protects the surface against external factors, giving it an aesthetic, silvery shine.
This rod magnet 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 and weaknesses of neodymium magnets.

Advantages

In addition to their long-term stability, neodymium magnets provide the following advantages:
  • They retain full power for nearly ten years – the drop is just ~1% (based on simulations),
  • They are resistant to demagnetization induced by external disturbances,
  • A magnet with a shiny gold surface has better aesthetics,
  • Neodymium magnets achieve maximum magnetic induction on a small area, which increases force concentration,
  • Due to their durability and thermal resistance, neodymium magnets can operate (depending on the form) even at high temperatures reaching 230°C or more...
  • Possibility of custom forming and optimizing to individual conditions,
  • Significant place in electronics industry – they serve a role in data components, electric motors, medical equipment, as well as modern systems.
  • Thanks to concentrated force, small magnets offer high operating force, in miniature format,

Cons

Drawbacks and weaknesses of neodymium magnets and ways of using them
  • To avoid cracks upon strong impacts, we recommend using special steel holders. Such a solution protects the magnet and simultaneously increases its durability.
  • We warn that neodymium magnets can reduce their power at high temperatures. To prevent this, we suggest our specialized [AH] magnets, which work effectively even at 230°C.
  • They rust in a humid environment. For use outdoors we advise using waterproof magnets e.g. in rubber, plastic
  • Due to limitations in creating threads and complicated shapes in magnets, we propose using casing - magnetic mount.
  • Potential hazard to health – tiny shards of magnets pose a threat, if swallowed, which is particularly important in the context of child health protection. Furthermore, tiny parts of these devices are able to disrupt the diagnostic process medical in case of swallowing.
  • High unit price – neodymium magnets cost more than other types of magnets (e.g. ferrite), which increases costs of application in large quantities

Pull force analysis

Highest magnetic holding forcewhat affects it?

Information about lifting capacity was determined for optimal configuration, taking into account:
  • on a base made of structural steel, effectively closing the magnetic field
  • whose transverse dimension reaches at least 10 mm
  • with an polished touching surface
  • under conditions of ideal adhesion (surface-to-surface)
  • during detachment in a direction perpendicular to the plane
  • at temperature approx. 20 degrees Celsius

Lifting capacity in practice – influencing factors

Please note that the application force will differ subject to elements below, starting with the most relevant:
  • Distance (between the magnet and the metal), since even a very small distance (e.g. 0.5 mm) results in a reduction in lifting capacity by up to 50% (this also applies to paint, rust or dirt).
  • Load vector – highest force is available only during pulling at a 90° angle. The resistance to sliding of the magnet along the surface is usually several times smaller (approx. 1/5 of the lifting capacity).
  • Substrate thickness – to utilize 100% power, the steel must be adequately massive. Thin sheet limits the lifting capacity (the magnet "punches through" it).
  • Material type – ideal substrate is pure iron steel. Cast iron may have worse magnetic properties.
  • Surface condition – ground elements ensure maximum contact, which improves field saturation. Rough surfaces weaken the grip.
  • Temperature influence – hot environment reduces magnetic field. Too high temperature can permanently damage the magnet.

Lifting capacity testing was performed on a smooth plate of optimal thickness, under a perpendicular pulling force, whereas under parallel forces the load capacity is reduced by as much as fivefold. Additionally, even a small distance between the magnet and the plate decreases the lifting capacity.

Warnings
Health Danger

Life threat: Strong magnets can deactivate heart devices and defibrillators. Stay away if you have medical devices.

Combustion hazard

Mechanical processing of neodymium magnets poses a fire hazard. Neodymium dust reacts violently with oxygen and is hard to extinguish.

Demagnetization risk

Control the heat. Exposing the magnet above 80 degrees Celsius will destroy its magnetic structure and pulling force.

Phone sensors

A powerful magnetic field negatively affects the functioning of compasses in smartphones and GPS navigation. Keep magnets close to a device to prevent breaking the sensors.

Electronic hazard

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

Skin irritation risks

Certain individuals suffer from a hypersensitivity to Ni, which is the standard coating for neodymium magnets. Prolonged contact can result in dermatitis. We strongly advise use safety gloves.

Adults only

Only for adults. Small elements can be swallowed, leading to intestinal necrosis. Store away from children and animals.

Fragile material

Neodymium magnets are ceramic materials, which means they are prone to chipping. Collision of two magnets leads to them breaking into small pieces.

Crushing risk

Pinching hazard: The pulling power is so immense that it can result in blood blisters, pinching, and broken bones. Protective gloves are recommended.

Safe operation

Use magnets consciously. Their huge power can shock even experienced users. Plan your moves and respect their force.

Warning! Need more info? Check our post: Why are neodymium magnets dangerous?
Dhit sp. z o.o.

e-mail: bok@dhit.pl

tel: +48 888 99 98 98