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MW 3x1 / N38 - cylindrical magnet

cylindrical magnet

Catalog no 010063

GTIN/EAN: 5906301810629

5.00

Diameter Ø

3 mm [±0,1 mm]

Height

1 mm [±0,1 mm]

Weight

0.05 g

Magnetization Direction

↑ axial

Load capacity

0.21 kg / 2.10 N

Magnetic Induction

342.82 mT / 3428 Gs

Coating

[NiCuNi] Nickel

0.1353 with VAT / pcs + price for transport

0.1100 ZŁ net + 23% VAT / pcs

bulk discounts:

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Lifting power along with form of a neodymium magnet can be estimated using our magnetic mass calculator.

Orders placed before 14:00 will be shipped the same business day.

Technical details - MW 3x1 / N38 - cylindrical magnet

Specification / characteristics - MW 3x1 / N38 - cylindrical magnet

properties
properties values
Cat. no. 010063
GTIN/EAN 5906301810629
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 3 mm [±0,1 mm]
Height 1 mm [±0,1 mm]
Weight 0.05 g
Magnetization Direction ↑ axial
Load capacity ~ ? 0.21 kg / 2.10 N
Magnetic Induction ~ ? 342.82 mT / 3428 Gs
Coating [NiCuNi] Nickel
Manufacturing Tolerance ±0.1 mm

Magnetic properties of material N38

Specification / characteristics MW 3x1 / 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

Physical analysis of the assembly - technical parameters

These data are the result of a mathematical calculation. Results rely on algorithms for the material Nd2Fe14B. Operational conditions may deviate from the simulation results. Please consider these calculations as a supplementary guide for designers.

Table 1: Static pull force (force vs gap) - power drop
MW 3x1 / N38

Distance (mm) Induction (Gauss) / mT Pull Force (kg/lbs/g/N) Risk Status
0 mm 3422 Gs
342.2 mT
0.21 kg / 0.46 pounds
210.0 g / 2.1 N
low risk
1 mm 1521 Gs
152.1 mT
0.04 kg / 0.09 pounds
41.5 g / 0.4 N
low risk
2 mm 585 Gs
58.5 mT
0.01 kg / 0.01 pounds
6.1 g / 0.1 N
low risk
3 mm 260 Gs
26.0 mT
0.00 kg / 0.00 pounds
1.2 g / 0.0 N
low risk
5 mm 76 Gs
7.6 mT
0.00 kg / 0.00 pounds
0.1 g / 0.0 N
low risk
10 mm 12 Gs
1.2 mT
0.00 kg / 0.00 pounds
0.0 g / 0.0 N
low risk
15 mm 4 Gs
0.4 mT
0.00 kg / 0.00 pounds
0.0 g / 0.0 N
low risk
20 mm 2 Gs
0.2 mT
0.00 kg / 0.00 pounds
0.0 g / 0.0 N
low risk
30 mm 0 Gs
0.0 mT
0.00 kg / 0.00 pounds
0.0 g / 0.0 N
low risk
50 mm 0 Gs
0.0 mT
0.00 kg / 0.00 pounds
0.0 g / 0.0 N
low risk

Table 2: Sliding capacity (vertical surface)
MW 3x1 / N38

Distance (mm) Friction coefficient Pull Force (kg/lbs/g/N)
0 mm Stal (~0.2) 0.04 kg / 0.09 pounds
42.0 g / 0.4 N
1 mm Stal (~0.2) 0.01 kg / 0.02 pounds
8.0 g / 0.1 N
2 mm Stal (~0.2) 0.00 kg / 0.00 pounds
2.0 g / 0.0 N
3 mm Stal (~0.2) 0.00 kg / 0.00 pounds
0.0 g / 0.0 N
5 mm Stal (~0.2) 0.00 kg / 0.00 pounds
0.0 g / 0.0 N
10 mm Stal (~0.2) 0.00 kg / 0.00 pounds
0.0 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 3x1 / N38

Surface type Friction coefficient / % Mocy Max load (kg/lbs/g/N)
Raw steel
µ = 0.3 30% Nominalnej Siły
0.06 kg / 0.14 pounds
63.0 g / 0.6 N
Painted steel (standard)
µ = 0.2 20% Nominalnej Siły
0.04 kg / 0.09 pounds
42.0 g / 0.4 N
Oily/slippery steel
µ = 0.1 10% Nominalnej Siły
0.02 kg / 0.05 pounds
21.0 g / 0.2 N
Magnet with anti-slip rubber
µ = 0.5 50% Nominalnej Siły
0.11 kg / 0.23 pounds
105.0 g / 1.0 N

Table 4: Material efficiency (saturation) - sheet metal selection
MW 3x1 / N38

Steel thickness (mm) % power Real pull force (kg/lbs/g/N)
0.5 mm
10%
0.02 kg / 0.05 pounds
21.0 g / 0.2 N
1 mm
25%
0.05 kg / 0.12 pounds
52.5 g / 0.5 N
2 mm
50%
0.11 kg / 0.23 pounds
105.0 g / 1.0 N
3 mm
75%
0.16 kg / 0.35 pounds
157.5 g / 1.5 N
5 mm
100%
0.21 kg / 0.46 pounds
210.0 g / 2.1 N
10 mm
100%
0.21 kg / 0.46 pounds
210.0 g / 2.1 N
11 mm
100%
0.21 kg / 0.46 pounds
210.0 g / 2.1 N
12 mm
100%
0.21 kg / 0.46 pounds
210.0 g / 2.1 N

Table 5: Thermal resistance (stability) - resistance threshold
MW 3x1 / N38

Ambient temp. (°C) Power loss Remaining pull (kg/lbs/g/N) Status
20 °C 0.0% 0.21 kg / 0.46 pounds
210.0 g / 2.1 N
OK
40 °C -2.2% 0.21 kg / 0.45 pounds
205.4 g / 2.0 N
OK
60 °C -4.4% 0.20 kg / 0.44 pounds
200.8 g / 2.0 N
80 °C -6.6% 0.20 kg / 0.43 pounds
196.1 g / 1.9 N
100 °C -28.8% 0.15 kg / 0.33 pounds
149.5 g / 1.5 N

Table 6: Magnet-Magnet interaction (repulsion) - forces in the system
MW 3x1 / N38

Gap (mm) Attraction (kg/lbs) (N-S) Lateral Force (kg/lbs/g/N) Repulsion (kg/lbs) (N-N)
0 mm 0.51 kg / 1.12 pounds
4 928 Gs
0.08 kg / 0.17 pounds
77 g / 0.8 N
N/A
1 mm 0.26 kg / 0.56 pounds
4 847 Gs
0.04 kg / 0.08 pounds
38 g / 0.4 N
0.23 kg / 0.51 pounds
~0 Gs
2 mm 0.10 kg / 0.22 pounds
3 042 Gs
0.02 kg / 0.03 pounds
15 g / 0.1 N
0.09 kg / 0.20 pounds
~0 Gs
3 mm 0.04 kg / 0.08 pounds
1 865 Gs
0.01 kg / 0.01 pounds
6 g / 0.1 N
0.03 kg / 0.08 pounds
~0 Gs
5 mm 0.01 kg / 0.01 pounds
764 Gs
0.00 kg / 0.00 pounds
1 g / 0.0 N
0.00 kg / 0.00 pounds
~0 Gs
10 mm 0.00 kg / 0.00 pounds
153 Gs
0.00 kg / 0.00 pounds
0 g / 0.0 N
0.00 kg / 0.00 pounds
~0 Gs
20 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
50 mm 0.00 kg / 0.00 pounds
2 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
1 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
1 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
0 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
0 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
0 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) - precautionary measures
MW 3x1 / N38

Object / Device Limit (Gauss) / mT Safe distance
Pacemaker 5 Gs (0.5 mT) 1.5 cm
Hearing aid 10 Gs (1.0 mT) 1.5 cm
Timepiece 20 Gs (2.0 mT) 1.0 cm
Mobile device 40 Gs (4.0 mT) 1.0 cm
Car key 50 Gs (5.0 mT) 1.0 cm
Payment card 400 Gs (40.0 mT) 0.5 cm
HDD hard drive 600 Gs (60.0 mT) 0.5 cm

Table 8: Impact energy (kinetic energy) - warning
MW 3x1 / N38

Start from (mm) Speed (km/h) Energy (J) Predicted outcome
10 mm 65.36 km/h
(18.16 m/s)
0.01 J
30 mm 113.21 km/h
(31.45 m/s)
0.02 J
50 mm 146.15 km/h
(40.60 m/s)
0.04 J
100 mm 206.68 km/h
(57.41 m/s)
0.08 J

Table 9: Anti-corrosion coating durability
MW 3x1 / 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 3x1 / N38

Parameter Value SI Unit / Description
Magnetic Flux 257 Mx 2.6 µWb
Pc Coefficient 0.44 Low (Flat)

Table 11: Underwater work (magnet fishing)
MW 3x1 / N38

Environment Effective steel pull Effect
Air (land) 0.21 kg Standard
Water (riverbed) 0.24 kg
(+0.03 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. Vertical hold

*Caution: On a vertical surface, the magnet retains just a fraction of its max power.

2. Steel thickness impact

*Thin steel (e.g. 0.5mm PC case) drastically 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.

Engineering data and GPSR
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: 010063-2026
Quick Unit Converter
Force (pull)

Magnetic Field

Other deals

This product is an extremely powerful rod magnet, composed of advanced NdFeB material, which, at dimensions of Ø3x1 mm, guarantees optimal power. The MW 3x1 / N38 model is characterized by an accuracy of ±0.1mm and professional build quality, making it an excellent solution for the most demanding engineers and designers. As a cylindrical magnet with significant force (approx. 0.21 kg), this product is available off-the-shelf from our European logistics center, ensuring quick order fulfillment. Additionally, its Ni-Cu-Ni coating shields it against corrosion in typical operating conditions, ensuring an aesthetic appearance and durability for years.
This model is ideal for building electric motors, advanced Hall effect sensors, and efficient magnetic separators, where maximum induction on a small surface counts. Thanks to the pull force of 2.10 N with a weight of only 0.05 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., 3.1 mm) using two-component epoxy glues. To ensure long-term durability in automation, specialized industrial adhesives are used, which do not react with the nickel coating and fill the gap, guaranteeing high repeatability of the connection.
Magnets NdFeB grade N38 are suitable for 90% of applications in modeling and machine building, where excessive miniaturization with maximum force is not required. If you need even stronger magnets in the same volume (Ø3x1), 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 Ø3x1 mm, which, at a weight of 0.05 g, makes it an element with high magnetic energy density. The value of 2.10 N means that the magnet is capable of holding a weight many times exceeding its own mass of 0.05 g. The product has a [NiCuNi] coating, which protects the surface 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 3 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.

Strengths as well as weaknesses of Nd2Fe14B magnets.

Strengths

Besides their stability, neodymium magnets are valued for these benefits:
  • They virtually do not lose power, because even after 10 years the performance loss is only ~1% (according to literature),
  • They feature excellent resistance to weakening of magnetic properties when exposed to external magnetic sources,
  • The use of an shiny coating of noble metals (nickel, gold, silver) causes the element to be more visually attractive,
  • They feature high magnetic induction at the operating surface, which affects their effectiveness,
  • 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 as well as optimizing to defined conditions,
  • Huge importance in high-tech industry – they are used in mass storage devices, electric drive systems, advanced medical instruments, and technologically advanced constructions.
  • Relatively small size with high pulling force – neodymium magnets offer impressive pulling force in small dimensions, which allows their use in miniature devices

Weaknesses

Drawbacks and weaknesses of neodymium magnets: weaknesses and usage proposals
  • Brittleness is one of their disadvantages. Upon strong impact they can break. We advise keeping them in a strong case, which not only secures them against impacts but also increases their durability
  • When exposed to high temperature, neodymium magnets suffer a drop in power. Often, when the temperature exceeds 80°C, their power decreases (depending on the size, as well as shape of the magnet). For those who need magnets for extreme conditions, we offer [AH] versions withstanding up to 230°C
  • Due to the susceptibility of magnets to corrosion in a humid environment, we advise using waterproof magnets made of rubber, plastic or other material immune to moisture, in case of application outdoors
  • We recommend a housing - magnetic holder, due to difficulties in producing threads inside the magnet and complicated shapes.
  • Possible danger resulting from small fragments of magnets are risky, in case of ingestion, which gains importance in the context of child safety. It is also worth noting that small elements of these devices can be problematic in diagnostics medical when they are in the body.
  • Due to expensive raw materials, their price is relatively high,

Pull force analysis

Breakaway strength of the magnet in ideal conditionswhat affects it?

Magnet power was determined for optimal configuration, assuming:
  • on a plate made of structural steel, effectively closing the magnetic flux
  • whose thickness equals approx. 10 mm
  • with an polished contact surface
  • under conditions of no distance (metal-to-metal)
  • for force acting at a right angle (in the magnet axis)
  • at ambient temperature room level

Impact of factors on magnetic holding capacity in practice

Bear in mind that the application force may be lower subject to the following factors, starting with the most relevant:
  • Space 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.
  • Direction of force – maximum parameter is available only during perpendicular pulling. The resistance to sliding of the magnet along the plate is standardly several times lower (approx. 1/5 of the lifting capacity).
  • Substrate thickness – to utilize 100% power, the steel must be adequately massive. Paper-thin metal restricts the attraction force (the magnet "punches through" it).
  • Plate material – mild steel gives the best results. Alloy admixtures reduce magnetic properties and holding force.
  • Smoothness – ideal contact is obtained only on polished steel. Any scratches and bumps reduce the real contact area, reducing force.
  • Operating temperature – NdFeB sinters have a sensitivity to temperature. At higher temperatures they are weaker, and at low temperatures they can be stronger (up to a certain limit).

Lifting capacity testing was carried out on a smooth plate of optimal thickness, under perpendicular forces, whereas under parallel forces the lifting capacity is smaller. Moreover, even a small distance between the magnet and the plate reduces the load capacity.

H&S for magnets
Phone sensors

Navigation devices and mobile phones are extremely susceptible to magnetic fields. Direct contact with a strong magnet can decalibrate the sensors in your phone.

Metal Allergy

It is widely known that the nickel plating (the usual finish) is a strong allergen. If your skin reacts to metals, refrain from direct skin contact and select versions in plastic housing.

Maximum temperature

Avoid heat. Neodymium magnets are sensitive to temperature. If you need operation above 80°C, inquire about HT versions (H, SH, UH).

Health Danger

For implant holders: Strong magnetic fields affect electronics. Keep at least 30 cm distance or request help to work with the magnets.

Protect data

Do not bring magnets close to a purse, computer, or TV. The magnetism can destroy these devices and wipe information from cards.

No play value

Neodymium magnets are not toys. Accidental ingestion of multiple magnets may result in them pinching intestinal walls, which poses a severe health hazard and necessitates immediate surgery.

Bone fractures

Big blocks can crush fingers instantly. Under no circumstances put your hand betwixt two attracting surfaces.

Magnet fragility

Despite metallic appearance, the material is delicate and cannot withstand shocks. Avoid impacts, as the magnet may crumble into sharp, dangerous pieces.

Do not underestimate power

Use magnets consciously. Their huge power can surprise even professionals. Plan your moves and respect their power.

Mechanical processing

Powder produced during grinding of magnets is self-igniting. Do not drill into magnets without proper cooling and knowledge.

Security! Want to know more? Read our article: Are neodymium magnets dangerous?
Dhit sp. z o.o.

e-mail: bok@dhit.pl

tel: +48 888 99 98 98