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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

check technical specifications »

0.1353 ZŁ with VAT / pcs + price for transport

0.1100 ZŁ net + 23% VAT / pcs

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Detailed specification - 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

Engineering simulation of the magnet - report

These data constitute the result of a mathematical simulation. Results were calculated on models for the class Nd2Fe14B. Actual conditions might slightly differ from theoretical values. Use these data as a preliminary roadmap during assembly planning.

Table 1: Static pull force (pull vs gap) - characteristics
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
 safe
1 mm 1521 Gs
152.1 mT
 0.04 kg / 0.09 LBS
41.5 g / 0.4 N
 safe
2 mm 585 Gs
58.5 mT
 0.01 kg / 0.01 LBS
6.1 g / 0.1 N
 safe
3 mm 260 Gs
26.0 mT
 0.00 kg / 0.00 LBS
1.2 g / 0.0 N
 safe
5 mm 76 Gs
7.6 mT
 0.00 kg / 0.00 LBS
0.1 g / 0.0 N
 safe
10 mm 12 Gs
1.2 mT
 0.00 kg / 0.00 LBS
0.0 g / 0.0 N
 safe
15 mm 4 Gs
0.4 mT
 0.00 kg / 0.00 LBS
0.0 g / 0.0 N
 safe
20 mm 2 Gs
0.2 mT
 0.00 kg / 0.00 LBS
0.0 g / 0.0 N
 safe
30 mm 0 Gs
0.0 mT
 0.00 kg / 0.00 LBS
0.0 g / 0.0 N
 safe
50 mm 0 Gs
0.0 mT
 0.00 kg / 0.00 LBS
0.0 g / 0.0 N
 safe
Magnetic force decreases significantly with every mm of distance. Keep in mind that even a microscopic distance (e.g., dirt, varnish, veneer) strongly weakens the grip. Magnets operate optimally at the point of direct contact; distance nullifies the power. Analyze how quickly the parameters plummet, when the product does not adhere flatly to the metal substrate. When calculating the assembly, avoid unnecessary gaps.

Table 2: Vertical load (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 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
The following data defines the theoretical force required to cause the downward movement of the magnet vertically against a vertical metal surface (assuming typical friction coefficient). This value is relative to the air gap between the magnet and the surface.

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
When hanging a magnet on a upright wall (e.g., a car body), it you can count on only approx. 1/5 of its nominal power. Gravity as well as a weak degree of grip cause that holders move down faster than they detach. Planning a hanger? Remember that the shear force is significantly lower than the perpendicular breakaway force. On a slippery surface, the holder will slide down under a noticeably lighter weight. Utilizing a rubberized pad can significantly improve the result.

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 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
A thin metal plate is incapable of focus the full magnetic flux, which weakens actual performance of the magnet. If you install a neodymium to a thin surface, the flux will pass right through and the attraction force will be weaker. To achieve 100% of this neodymium's power, you require a sufficiently solid element of metal. The saturation phenomenon means that on delicate walls (e.g., car bodies), the magnet works worse. We advise picking the steel thickness based on the following data.

Table 5: Working in heat (material behavior) - power drop
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
Standard neodymium magnets irreversibly lose strength above the temperature limit. Protect against heat – high temperature can irreversibly damage this magnet. With increasing heat, the magnet's power momentarily drops. Do not use this product close to heaters higher than its working range. Too high temperature will lead to irreversible degradation of magnetic properties.
*Engineering note: Thermal stability is determined by both grade, but also on the magnet's shape. Thin magnets (low permeance coefficient) are more susceptible to demagnetization at lower temperatures than taller cylinders. The danger warning in the table points to permanent field degradation for this specific geometry.

Table 6: Magnet-Magnet interaction (attraction) - field collision
MW 3x1 / N38

Gap (mm) Attraction (kg/lbs) (N-S) Shear 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
Two magnetic products attract each other from a wider radius than a magnet and sheet combination. The connection of magnet-to-magnet creates a more powerful interaction and a wider radius of action. Designing a solid fastener? Apply two magnets instead of one magnet and a striker plate. Remember that when attracting two neodymiums, the impact force is extreme. The levitation is slightly lower than the connection force, but still impressive.
*Field value for N-N configuration is approximately ~0 Gs at the midpoint of the gap (caused by magnetic field nullification).
* Estimates refer to friction force of dual identical magnets (friction ~0.15 for Ni-Ni coating).

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
Powerful magnet radiation poses a serious hazard to electronic devices as well as pacemakers. These NdFeB products produce a field that destroys function of sensitive medical devices. Notice: the invisible magnetic field passes through tissues and glass. Increased vigilance must be exercised by people with cochlear implants and insulin pumps. The risk also applies to: mechanical watches, remotes, speakers, and displays. Do not bring the product near payment cards, hard drives, or sensitive navigation tools.

Table 8: Impact energy (cracking risk) - 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
NdFeB products are prone to chipping – a violent impact against metal risks their cracking. Watch the impact speed – a neodymium left loose becomes dangerous. Striking energy can trigger coating fragments or painful pinches to skin. Always hold the magnet during installation so it doesn't hit with great force against the metal. A collision at high speed almost guarantees destruction of the magnet. Wear safety glasses when working with powerful specimens.

Table 9: Surface protection spec
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)
Neodymium magnets are highly susceptible to corrosion without proper protection. The silver nickel coating also serves an aesthetic function but is not fully waterproof.

Table 10: Construction data (Pc)
MW 3x1 / N38

Parameter Value SI Unit / Description
Magnetic Flux 257 Mx 2.6 µWb
Pc Coefficient 0.44 Low (Flat)
Flux value passing through the magnet pole. Key data in coil applications as well as sensors. Pc value defines the working geometry.

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: This magnet has a standard nickel coating. After use in water, it must be dried and maintained immediately, otherwise it will rust!
Contrary to myths, water does not block the magnetic field. However, remember the water resistance when pulling the rope quickly.
1. Vertical hold

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

2. Steel thickness impact

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

3. Thermal stability

*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%
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: 010063-2026
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This product is a very strong cylinder magnet, manufactured from advanced NdFeB material, which, with dimensions of Ø3x1 mm, guarantees maximum efficiency. This specific item boasts an accuracy of ±0.1mm and industrial build quality, making it a perfect solution for the most demanding engineers and designers. As a magnetic rod with impressive force (approx. 0.21 kg), this product is in stock from our warehouse in Poland, ensuring lightning-fast order fulfillment. Moreover, its Ni-Cu-Ni coating secures it against corrosion in typical operating conditions, guaranteeing an aesthetic appearance and durability for years.
It finds application in modeling, advanced automation, and broadly understood industry, serving as a positioning or actuating element. Thanks to the pull force of 2.10 N with a weight of only 0.05 g, this rod is indispensable in miniature devices and wherever every gram matters.
Due to the delicate structure of the ceramic sinter, you must not use 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 are safe for nickel and fill the gap, guaranteeing high repeatability of the connection.
Grade N38 is the most frequently chosen standard for professional neodymium magnets, offering an optimal price-to-power ratio 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 warehouse.
The presented product is a neodymium magnet with precisely defined parameters: diameter 3 mm and height 1 mm. The key parameter here is the lifting capacity amounting to approximately 0.21 kg (force ~2.10 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.
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 diametrically if your project requires it.

Advantages as well as disadvantages of neodymium magnets.

Strengths

Apart from their superior magnetism, neodymium magnets have these key benefits:
  • They retain full power for almost 10 years – the loss is just ~1% (based on simulations),
  • They have excellent resistance to weakening of magnetic properties as a result of external fields,
  • A magnet with a shiny gold surface is more attractive,
  • They show high magnetic induction at the operating surface, which improves attraction properties,
  • Due to their durability and thermal resistance, neodymium magnets can operate (depending on the shape) even at high temperatures reaching 230°C or more...
  • Thanks to the ability of precise shaping and customization to unique needs, neodymium magnets can be manufactured in a wide range of forms and dimensions, which amplifies use scope,
  • Fundamental importance in future technologies – they are commonly used in mass storage devices, brushless drives, precision medical tools, as well as modern systems.
  • Thanks to concentrated force, small magnets offer high operating force, in miniature format,

Disadvantages

Characteristics of disadvantages of neodymium magnets: application proposals
  • To avoid cracks under impact, we recommend using special steel holders. Such a solution protects the magnet and simultaneously improves its durability.
  • Neodymium magnets lose their strength 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 durability even at temperatures up to 230°C
  • They oxidize in a humid environment - during use outdoors we recommend using waterproof magnets e.g. in rubber, plastic
  • We recommend casing - magnetic mechanism, due to difficulties in realizing nuts inside the magnet and complex forms.
  • Possible danger related to microscopic parts of magnets are risky, if swallowed, which becomes key in the context of child health protection. Furthermore, tiny parts of these devices are able to complicate diagnosis medical in case of swallowing.
  • With mass production the cost of neodymium magnets is a challenge,

Lifting parameters

Maximum magnetic pulling force – what affects it?

The force parameter is a measurement result conducted under standard conditions:
  • with the application of a sheet made of special test steel, guaranteeing maximum field concentration
  • whose thickness equals approx. 10 mm
  • with a plane perfectly flat
  • with direct contact (without paint)
  • under perpendicular force direction (90-degree angle)
  • at standard ambient temperature

Determinants of practical lifting force of a magnet

Holding efficiency impacted by specific conditions, including (from priority):
  • Distance – the presence of foreign body (rust, tape, gap) interrupts the magnetic circuit, which reduces capacity rapidly (even by 50% at 0.5 mm).
  • Direction of force – maximum parameter is reached only during perpendicular pulling. The shear force of the magnet along the surface is standardly many times smaller (approx. 1/5 of the lifting capacity).
  • Steel thickness – insufficiently thick plate does not accept the full field, causing part of the power to be escaped to the other side.
  • Steel grade – the best choice is high-permeability steel. Stainless steels may have worse magnetic properties.
  • Base smoothness – the smoother and more polished the plate, the better the adhesion and higher the lifting capacity. Unevenness acts like micro-gaps.
  • Thermal environment – heating the magnet causes a temporary drop of induction. Check the thermal limit for a given model.

Holding force was tested on the plate surface of 20 mm thickness, when a perpendicular force was applied, in contrast under shearing force the holding force is lower. Additionally, even a slight gap between the magnet’s surface and the plate lowers the holding force.

Precautions when working with neodymium magnets
Threat to navigation

Remember: neodymium magnets produce a field that interferes with sensitive sensors. Keep a separation from your mobile, tablet, and navigation systems.

Nickel coating and allergies

A percentage of the population suffer from a sensitization to Ni, which is the typical protective layer for NdFeB magnets. Prolonged contact might lead to dermatitis. We strongly advise wear safety gloves.

Data carriers

Data protection: Strong magnets can damage payment cards and delicate electronics (heart implants, hearing aids, mechanical watches).

Keep away from children

Strictly keep magnets away from children. Choking hazard is significant, and the effects of magnets clamping inside the body are fatal.

Finger safety

Mind your fingers. Two powerful magnets will snap together instantly with a force of massive weight, crushing anything in their path. Exercise extreme caution!

Protective goggles

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

Immense force

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

Demagnetization risk

Keep cool. NdFeB magnets are sensitive to heat. If you need operation above 80°C, ask us about special high-temperature series (H, SH, UH).

Implant safety

For implant holders: Powerful magnets disrupt medical devices. Maintain at least 30 cm distance or ask another person to work with the magnets.

Combustion hazard

Dust produced during grinding of magnets is combustible. Avoid drilling into magnets unless you are an expert.

Important! Need more info? Check our post: Why are neodymium magnets dangerous?