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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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Detailed specification - 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 simulation of the product - data

These information constitute the outcome of a engineering analysis. Results rely on models for the class Nd2Fe14B. Operational performance might slightly differ from theoretical values. Treat these data as a preliminary roadmap when designing systems.

Table 1: Static pull force (force vs distance) - 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
weak grip
1 mm 2774 Gs
277.4 mT
1.27 kg / 2.79 pounds
1266.5 g / 12.4 N
weak grip
2 mm 2090 Gs
209.0 mT
0.72 kg / 1.59 pounds
719.2 g / 7.1 N
weak grip
3 mm 1521 Gs
152.1 mT
0.38 kg / 0.84 pounds
380.7 g / 3.7 N
weak grip
5 mm 795 Gs
79.5 mT
0.10 kg / 0.23 pounds
104.1 g / 1.0 N
weak grip
10 mm 205 Gs
20.5 mT
0.01 kg / 0.02 pounds
6.9 g / 0.1 N
weak grip
15 mm 76 Gs
7.6 mT
0.00 kg / 0.00 pounds
1.0 g / 0.0 N
weak grip
20 mm 36 Gs
3.6 mT
0.00 kg / 0.00 pounds
0.2 g / 0.0 N
weak grip
30 mm 12 Gs
1.2 mT
0.00 kg / 0.00 pounds
0.0 g / 0.0 N
weak grip
50 mm 3 Gs
0.3 mT
0.00 kg / 0.00 pounds
0.0 g / 0.0 N
weak grip

Table 2: Slippage capacity (vertical surface)
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: Vertical assembly (shearing) - 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: Steel thickness (substrate influence) - 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: Thermal stability (material behavior) - thermal limit
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: Two magnets (attraction) - field range
MW 9x3 / N38

Gap (mm) Attraction (kg/lbs) (N-S) Shear 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: Protective zones (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
Phone / Smartphone 40 Gs (4.0 mT) 2.0 cm
Car key 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 (cracking risk) - 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: 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 (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%
Warning: Standard nickel requires drying after every contact with moisture; lack of maintenance will lead to rust spots.
1. Sliding resistance

*Warning: On a vertical wall, the magnet retains just approx. 20-30% of its max power.

2. Efficiency vs thickness

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

3. Thermal stability

*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) = 0.44

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 specification and ecology
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: 010108-2025
Magnet Unit Converter
Pulling force

Magnetic Field

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The offered product is an exceptionally strong cylindrical magnet, composed of advanced NdFeB material, which, at dimensions of Ø9x3 mm, guarantees the highest energy density. The MW 9x3 / N38 component boasts high dimensional repeatability and professional build quality, making it an ideal solution for the most demanding 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 lightning-fast order fulfillment. Furthermore, its triple-layer Ni-Cu-Ni coating secures it against corrosion in typical operating conditions, guaranteeing an aesthetic appearance and durability for years.
It successfully proves itself in DIY projects, advanced robotics, and broadly understood industry, serving as a positioning 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 every gram matters.
Since our magnets have a very precise dimensions, the best method is to glue them into holes with a slightly larger diameter (e.g., 9.1 mm) using two-component epoxy glues. To ensure long-term durability in automation, 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 frequently chosen standard for industrial neodymium magnets, offering an optimal price-to-power ratio and operational stability. If you need the strongest 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 warehouse.
This model is characterized by dimensions Ø9x3 mm, which, at a weight of 1.43 g, makes it an element with impressive 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 grade 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 9 mm. Such an arrangement is most desirable when connecting magnets in stacks (e.g., in filters) or when mounting in sockets at the bottom of a hole. On request, we can also produce versions magnetized diametrically if your project requires it.

Strengths and weaknesses of neodymium magnets.

Benefits

Besides their stability, neodymium magnets are valued for these benefits:
  • Their strength remains stable, and after approximately 10 years it drops only by ~1% (according to research),
  • They feature excellent resistance to magnetism drop due to opposing magnetic fields,
  • The use of an refined coating of noble metals (nickel, gold, silver) causes the element to be more visually attractive,
  • The surface of neodymium magnets generates a concentrated magnetic field – this is one of their assets,
  • Thanks to resistance to high temperature, they are capable of working (depending on the shape) even at temperatures up to 230°C and higher...
  • Considering the potential of accurate forming and customization to custom requirements, magnetic components can be produced in a wide range of geometric configurations, which expands the range of possible applications,
  • Wide application in modern industrial fields – they find application in magnetic memories, motor assemblies, medical devices, also other advanced devices.
  • Thanks to efficiency per cm³, small magnets offer high operating force, in miniature format,

Cons

Cons of neodymium magnets: application proposals
  • Brittleness is one of their disadvantages. Upon intense impact they can break. We recommend keeping them in a strong case, which not only secures them against impacts but also raises their durability
  • Neodymium magnets decrease their force under the influence of heating. As soon as 80°C is exceeded, many of them start losing their force. 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 recommend using waterproof magnets made of rubber, plastic or other material resistant to moisture, in case of application outdoors
  • Due to limitations in producing nuts and complicated forms in magnets, we propose using casing - magnetic holder.
  • Possible danger related to microscopic parts of magnets are risky, if swallowed, which is particularly important in the aspect of protecting the youngest. It is also worth noting that tiny parts of these devices can complicate diagnosis medical when they are in the body.
  • High unit price – neodymium magnets cost more than other types of magnets (e.g. ferrite), which hinders application in large quantities

Lifting parameters

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

Holding force of 1.94 kg is a result of laboratory testing performed under the following configuration:
  • on a plate made of structural steel, effectively closing the magnetic flux
  • whose thickness equals approx. 10 mm
  • characterized by smoothness
  • under conditions of gap-free contact (surface-to-surface)
  • under perpendicular application of breakaway force (90-degree angle)
  • at ambient temperature room level

Key elements affecting lifting force

It is worth knowing that the magnet holding may be lower depending on the following factors, in order of importance:
  • Distance (between the magnet and the plate), as even a microscopic clearance (e.g. 0.5 mm) leads to a decrease in force by up to 50% (this also applies to paint, rust or debris).
  • Force direction – note that the magnet has greatest strength perpendicularly. Under shear forces, the holding force drops significantly, often to levels of 20-30% of the nominal value.
  • Wall thickness – the thinner the sheet, the weaker the hold. Part of the magnetic field passes through the material instead of generating force.
  • Metal type – different alloys attracts identically. High carbon content worsen the attraction effect.
  • Plate texture – smooth surfaces guarantee perfect abutment, which increases force. Rough surfaces weaken the grip.
  • Operating temperature – neodymium magnets 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 testing was performed on plates with a smooth surface of optimal thickness, under perpendicular forces, however under shearing force the holding force is lower. In addition, even a small distance between the magnet and the plate decreases the load capacity.

Safety rules for work with neodymium magnets
GPS Danger

A strong magnetic field disrupts the operation of compasses in smartphones and navigation systems. Do not bring magnets near a smartphone to prevent breaking the sensors.

Adults only

Product intended for adults. Small elements pose a choking risk, causing severe trauma. Keep away from children and animals.

Bodily injuries

Large magnets can smash fingers instantly. Under no circumstances put your hand between two attracting surfaces.

Electronic hazard

Powerful magnetic fields can erase data on credit cards, HDDs, and storage devices. Keep a distance of at least 10 cm.

Warning for heart patients

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

Combustion hazard

Drilling and cutting of NdFeB material poses a fire hazard. Magnetic powder reacts violently with oxygen and is difficult to extinguish.

Avoid contact if allergic

Nickel alert: The Ni-Cu-Ni coating consists of nickel. If an allergic reaction occurs, cease handling magnets and use protective gear.

Handling guide

Before use, check safety instructions. Sudden snapping can break the magnet or injure your hand. Think ahead.

Do not overheat magnets

Keep cool. NdFeB magnets are susceptible to temperature. If you require resistance above 80°C, inquire about HT versions (H, SH, UH).

Shattering risk

Protect your eyes. Magnets can fracture upon uncontrolled impact, launching shards into the air. We recommend safety glasses.

Important! Looking for details? Read our article: Are neodymium magnets dangerous?
Dhit sp. z o.o.

e-mail: bok@dhit.pl

tel: +48 888 99 98 98