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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

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Physical properties - 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

Technical simulation of the product - report

The following information constitute the outcome of a mathematical simulation. Values rely on algorithms for the class Nd2Fe14B. Actual performance may differ. Please consider these calculations as a reference point during assembly planning.

Table 1: Static pull force (force vs gap) - interaction chart
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 lbs
210.0 g / 2.1 N
weak grip
1 mm 1521 Gs
152.1 mT
0.04 kg / 0.09 lbs
41.5 g / 0.4 N
weak grip
2 mm 585 Gs
58.5 mT
0.01 kg / 0.01 lbs
6.1 g / 0.1 N
weak grip
3 mm 260 Gs
26.0 mT
0.00 kg / 0.00 lbs
1.2 g / 0.0 N
weak grip
5 mm 76 Gs
7.6 mT
0.00 kg / 0.00 lbs
0.1 g / 0.0 N
weak grip
10 mm 12 Gs
1.2 mT
0.00 kg / 0.00 lbs
0.0 g / 0.0 N
weak grip
15 mm 4 Gs
0.4 mT
0.00 kg / 0.00 lbs
0.0 g / 0.0 N
weak grip
20 mm 2 Gs
0.2 mT
0.00 kg / 0.00 lbs
0.0 g / 0.0 N
weak grip
30 mm 0 Gs
0.0 mT
0.00 kg / 0.00 lbs
0.0 g / 0.0 N
weak grip
50 mm 0 Gs
0.0 mT
0.00 kg / 0.00 lbs
0.0 g / 0.0 N
weak grip

Table 2: Slippage load (wall)
MW 3x1 / N38

Distance (mm) Friction coefficient Pull Force (kg/lbs/g/N)
0 mm Stal (~0.2) 0.04 kg / 0.09 lbs
42.0 g / 0.4 N
1 mm Stal (~0.2) 0.01 kg / 0.02 lbs
8.0 g / 0.1 N
2 mm Stal (~0.2) 0.00 kg / 0.00 lbs
2.0 g / 0.0 N
3 mm Stal (~0.2) 0.00 kg / 0.00 lbs
0.0 g / 0.0 N
5 mm Stal (~0.2) 0.00 kg / 0.00 lbs
0.0 g / 0.0 N
10 mm Stal (~0.2) 0.00 kg / 0.00 lbs
0.0 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: Vertical assembly (sliding) - behavior on slippery surfaces
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 lbs
63.0 g / 0.6 N
Painted steel (standard)
µ = 0.2 20% Nominalnej Siły
0.04 kg / 0.09 lbs
42.0 g / 0.4 N
Oily/slippery steel
µ = 0.1 10% Nominalnej Siły
0.02 kg / 0.05 lbs
21.0 g / 0.2 N
Magnet with anti-slip rubber
µ = 0.5 50% Nominalnej Siły
0.11 kg / 0.23 lbs
105.0 g / 1.0 N

Table 4: Material efficiency (saturation) - power losses
MW 3x1 / N38

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

Table 5: Working in heat (material behavior) - 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 lbs
210.0 g / 2.1 N
OK
40 °C -2.2% 0.21 kg / 0.45 lbs
205.4 g / 2.0 N
OK
60 °C -4.4% 0.20 kg / 0.44 lbs
200.8 g / 2.0 N
80 °C -6.6% 0.20 kg / 0.43 lbs
196.1 g / 1.9 N
100 °C -28.8% 0.15 kg / 0.33 lbs
149.5 g / 1.5 N

Table 6: Two magnets (repulsion) - field range
MW 3x1 / N38

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

Table 7: Safety (HSE) (implants) - warnings
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
Mechanical watch 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: Collisions (cracking risk) - collision effects
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: Corrosion resistance
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: Construction data (Flux)
MW 3x1 / N38

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

Table 11: Physics of underwater searching
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%
Warning: 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 holds just a fraction of its perpendicular strength.

2. Steel saturation

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

3. Power loss vs temp

*For N38 material, 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

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.

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
Magnet Unit Converter
Magnet pull force

Field Strength

Check out more products

The presented product is an incredibly powerful rod magnet, manufactured from modern NdFeB material, which, with dimensions of Ø3x1 mm, guarantees maximum efficiency. The MW 3x1 / N38 model boasts an accuracy of ±0.1mm and professional build quality, making it an ideal solution for professional engineers and designers. As a magnetic rod with significant force (approx. 0.21 kg), this product is available off-the-shelf from our warehouse in Poland, ensuring quick order fulfillment. Additionally, its Ni-Cu-Ni coating secures it against corrosion in standard operating conditions, guaranteeing an aesthetic appearance and durability for years.
This model is ideal for building generators, advanced sensors, and efficient magnetic separators, where field concentration on a small surface counts. Thanks to the high power of 2.10 N with a weight of only 0.05 g, this rod is indispensable in electronics and wherever every gram matters.
Since our magnets have a tolerance of ±0.1mm, the best method 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, anaerobic resins are used, which do not react with the nickel coating 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 (Ø3x1), 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 3 mm and height 1 mm. The key parameter here is the holding force amounting to approximately 0.21 kg (force ~2.10 N), which, with such defined dimensions, proves the high grade of the NdFeB material. The product has a [NiCuNi] coating, which protects the surface against external factors, 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.

Pros as well as cons of Nd2Fe14B magnets.

Advantages

Apart from their notable power, neodymium magnets have these key benefits:
  • They retain magnetic properties for almost ten years – the drop is just ~1% (based on simulations),
  • They possess excellent resistance to magnetism drop due to external magnetic sources,
  • In other words, due to the glossy layer of silver, the element gains a professional look,
  • Neodymium magnets deliver maximum magnetic induction on a their surface, which ensures high operational effectiveness,
  • Due to their durability and thermal resistance, neodymium magnets are capable of operate (depending on the form) even at high temperatures reaching 230°C or more...
  • In view of the possibility of free forming and adaptation to custom needs, NdFeB magnets can be created in a broad palette of geometric configurations, which increases their versatility,
  • Key role in advanced technology sectors – they are commonly used in magnetic memories, electromotive mechanisms, diagnostic systems, as well as multitasking production systems.
  • Thanks to efficiency per cm³, small magnets offer high operating force, occupying minimum space,

Weaknesses

Drawbacks and weaknesses of neodymium magnets and proposals for their use:
  • They are prone to damage upon heavy impacts. To avoid cracks, it is worth securing magnets in a protective case. Such protection not only shields the magnet but also increases its resistance to damage
  • NdFeB magnets lose strength when exposed to high temperatures. After reaching 80°C, many of them experience permanent weakening of power (a factor is the shape as well as dimensions of the magnet). We offer magnets specially adapted to work at temperatures up to 230°C marked [AH], which are extremely resistant to heat
  • 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 creating threads in the magnet and complex forms - recommended is cover - magnet mounting.
  • Potential hazard resulting from small fragments of magnets are risky, if swallowed, which becomes key in the context of child health protection. It is also worth noting that tiny parts of these devices are able to disrupt the diagnostic process medical after entering the body.
  • With mass production the cost of neodymium magnets is a challenge,

Holding force characteristics

Maximum magnetic pulling forcewhat it depends on?

The declared magnet strength refers to the peak performance, obtained under laboratory conditions, specifically:
  • on a block made of structural steel, perfectly concentrating the magnetic flux
  • whose thickness is min. 10 mm
  • characterized by even structure
  • with direct contact (without impurities)
  • for force acting at a right angle (pull-off, not shear)
  • at standard ambient temperature

Impact of factors on magnetic holding capacity in practice

Holding efficiency impacted by specific conditions, including (from most important):
  • Clearance – the presence of foreign body (paint, tape, gap) interrupts the magnetic circuit, which lowers capacity rapidly (even by 50% at 0.5 mm).
  • Loading method – catalog parameter refers to pulling vertically. When applying parallel force, the magnet exhibits much less (often approx. 20-30% of maximum force).
  • Steel thickness – too thin plate causes magnetic saturation, causing part of the flux to be lost to the other side.
  • Steel grade – the best choice is pure iron steel. Cast iron may attract less.
  • Plate texture – smooth surfaces guarantee perfect abutment, which increases force. Rough surfaces reduce efficiency.
  • Thermal environment – heating the magnet results in weakening of induction. Check the maximum operating temperature for a given model.

Lifting capacity testing was conducted on plates with a smooth surface of optimal thickness, under perpendicular forces, however under attempts to slide the magnet the load capacity is reduced by as much as 5 times. Moreover, even a minimal clearance between the magnet’s surface and the plate reduces the lifting capacity.

Precautions when working with neodymium magnets
Handling guide

Handle with care. Neodymium magnets attract from a distance and snap with huge force, often quicker than you can react.

Danger to the youngest

NdFeB magnets are not suitable for play. Swallowing a few magnets can lead to them attracting across intestines, which poses a direct threat to life and requires urgent medical intervention.

GPS Danger

A powerful magnetic field negatively affects the functioning of compasses in smartphones and GPS navigation. Do not bring magnets close to a device to prevent breaking the sensors.

Cards and drives

Intense magnetic fields can destroy records on credit cards, hard drives, and storage devices. Maintain a gap of at least 10 cm.

Health Danger

For implant holders: Strong magnetic fields affect medical devices. Maintain at least 30 cm distance or ask another person to handle the magnets.

Finger safety

Protect your hands. Two large magnets will join instantly with a force of massive weight, destroying everything in their path. Exercise extreme caution!

Demagnetization risk

Regular neodymium magnets (grade N) lose magnetization when the temperature surpasses 80°C. This process is irreversible.

Fragile material

Despite the nickel coating, neodymium is brittle and not impact-resistant. Avoid impacts, as the magnet may crumble into sharp, dangerous pieces.

Dust explosion hazard

Drilling and cutting of neodymium magnets poses a fire hazard. Magnetic powder oxidizes rapidly with oxygen and is difficult to extinguish.

Avoid contact if allergic

It is widely known that the nickel plating (standard magnet coating) is a strong allergen. If your skin reacts to metals, prevent direct skin contact and select encased magnets.

Danger! Want to know more? Check our post: Are neodymium magnets dangerous?