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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

product specifications »

0.1353 ZŁ with VAT / pcs + price for transport

0.1100 ZŁ net + 23% VAT / pcs

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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

Engineering modeling of the product - technical parameters

The following values constitute the direct effect of a physical analysis. Values were calculated on algorithms for the class Nd2Fe14B. Actual performance may deviate from the simulation results. Use these calculations as a supplementary guide during assembly planning.

Table 1: Static pull force (pull vs distance) - 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 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
Pulling power decreases drastically with every subsequent millimeter of distance. Note that even the smallest gap (e.g., dirt, varnish, dust) significantly reduces the pull force. Neodymiums work most effectively in perfect adhesion; air break drastically cuts the power. Observe how flashily the load capacity drop, when the product does not touch flatly to the steel surface. When designing the mounting, eliminate additional spacers.

Table 2: Sliding 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
This section shows the theoretical shear load necessary to initiate the shifting of the magnet downwards along a vertical steel wall (considering typical friction). The holding force is relative to the gap size between the magnet and the metal.

Table 3: Vertical assembly (shearing) - 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 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 mounting a holder on a vertical plane (e.g., a fridge), it will only hold barely about 20%-30% of its maximum pull force. Gravity as well as a low friction coefficient mean that holders move down faster than they detach. Planning a vertical fastening? Consider that the sliding force is significantly lower than the perpendicular breakaway force. On a smooth steel, the element will give way down under a significantly smaller cargo. Using a rubber layer can significantly increase the grip.

Table 4: Steel thickness (substrate influence) - 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 sheet is incapable of absorb the entire magnetic field, which wastes potential of the holder. If you install a neodymium to a too thin substrate, the flux will penetrate right through and the attraction force will be weaker. To achieve 100% of this neodymium's potential, you need a suitably thick element of steel. The saturation phenomenon causes that on thin elements (e.g., thin profiles), the magnet holds weaker. We suggest choosing the steel cross-section from these parameters.

Table 5: Thermal resistance (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
Ordinary NdFeB products irreversibly lose power after exceeding the maximum temperature. Watch out for overheating – excessive heat can irreversibly destroy this product. With every degree above norm, the neodymium's capacity briefly lowers. Avoid using this product in hot environments higher than its safe range. Exceeding the critical threshold will result in irreversible degradation of magnetic properties.
*Important note: Heat tolerance depends not only on the material grade, as well as the dimension ratios. Flat magnets (low permeance coefficient) may lose charge permanently at lower temperatures than taller cylinders. Warning indicator in the table points to permanent field degradation for this particular item.

Table 6: Magnet-Magnet interaction (attraction) - 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
Two strong neodymiums interact from a significantly greater distance than a magnet and sheet setup. Such a system of two magnets produces a massive flux and a further horizon of operation. Designing a powerful holder? Use a pair of magnets instead of one magnet and a striker plate. Remember that when connecting a pair of magnets, the collision energy is huge. The repulsion force is slightly lower than the connection force, but still significant.
*Flux density between like poles is approximately ~0 Gs at the midpoint between the magnets (due to field cancellation).
Note: Results refer to friction force of dual same neodymium magnets (friction ~0.15 for Ni-Ni plating).

Table 7: Protective zones (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
Mechanical watch 20 Gs (2.0 mT) 1.0 cm
Mobile device 40 Gs (4.0 mT) 1.0 cm
Remote 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 real danger to electronics as well as medical implants. These magnets generate a flux that prevents correct functioning of sensitive medical devices. Remember: the unseen radiation acts through matter and plastic. Increased vigilance must be exercised by people with hearing aids and insulin pumps. Also at risk are: automatic timepieces, car keys, speakers, and screens. 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
Neodymium magnets are delicate – a strong collision with metal risks their cracking. Watch the impact speed – a magnet released freely speeds with massive force. Kinetic force can cause material chips or dangerous crushing to fingers. Always hold the magnet during mounting so it doesn't hit with great force against the metal. A contact at a velocity of dozens of km/h ends with a crack of the magnet. Wear safety glasses when handling with large magnets.

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)
The following table defines the conditions under which this product can be safely used. Moisture resistance is crucial for installations in bathrooms or outdoors.

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 pole surface. Key data when building generators and motors. Pc value determines the magnet's operating point.

Table 11: Submerged application
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%
Corrosion 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. Wall mount (shear)

*Warning: On a vertical wall, the magnet retains only ~20% of its max power.

2. Steel saturation

*Thin steel (e.g. computer case) drastically limits the holding force.

3. Heat tolerance

*For standard magnets, 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.

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%
Ecology and recycling (GPSR)
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
Measurement Calculator
Pulling force
Field Strength
Input a figure in just one field to get results for the other fields at once.

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The presented product is an incredibly powerful rod magnet, composed of advanced NdFeB material, which, at dimensions of Ø3x1 mm, guarantees maximum efficiency. This specific item boasts a tolerance of ±0.1mm and industrial build quality, making it an excellent solution for professional engineers and designers. As a cylindrical magnet with impressive force (approx. 0.21 kg), this product is available off-the-shelf from our European logistics center, ensuring lightning-fast order fulfillment. Moreover, its Ni-Cu-Ni coating shields it against corrosion in standard operating conditions, ensuring an aesthetic appearance and durability for years.
It successfully proves itself in modeling, advanced automation, and broadly understood industry, serving as a fastening 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 electronics and wherever low weight is crucial.
Due to the delicate structure of the ceramic sinter, you must not use force-fitting (so-called press-fit), as this risks immediate cracking of this precision component. To ensure long-term durability in industry, 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 professional 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.
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 external factors, giving it an aesthetic, silvery shine.
This cylinder is magnetized axially (along the height of 1 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.

Pros and cons of neodymium magnets.

Advantages

Apart from their superior magnetism, neodymium magnets have these key benefits:
  • They retain attractive force for almost 10 years – the loss is just ~1% (in theory),
  • They are noted for resistance to demagnetization induced by external magnetic fields,
  • The use of an metallic layer of noble metals (nickel, gold, silver) causes the element to present itself better,
  • They feature high magnetic induction at the operating surface, which improves attraction properties,
  • Made from properly selected components, these magnets show impressive resistance to high heat, enabling them to function (depending on their shape) at temperatures up to 230°C and above...
  • Possibility of precise forming as well as optimizing to defined requirements,
  • Wide application in high-tech industry – they serve a role in hard drives, electric drive systems, precision medical tools, as well as multitasking production systems.
  • Compactness – despite small sizes they offer powerful magnetic field, making them ideal for precision applications

Cons

What to avoid - cons of neodymium magnets and proposals for their use:
  • To avoid cracks under impact, we suggest using special steel housings. Such a solution secures the magnet and simultaneously improves its durability.
  • Neodymium magnets lose their power 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
  • When exposed to humidity, magnets start to rust. To use them in conditions outside, it is recommended to use protective magnets, such as magnets in rubber or plastics, which prevent oxidation and corrosion.
  • Due to limitations in creating threads and complicated shapes in magnets, we propose using casing - magnetic mechanism.
  • Potential hazard resulting from small fragments of magnets are risky, in case of ingestion, which becomes key in the context of child safety. Additionally, tiny parts of these products are able to be problematic in diagnostics medical when they are in the body.
  • With mass production the cost of neodymium magnets is a challenge,

Holding force characteristics

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

Magnet power was defined for optimal configuration, assuming:
  • using a base made of mild steel, serving as a ideal flux conductor
  • possessing a massiveness of minimum 10 mm to ensure full flux closure
  • with an polished touching surface
  • with direct contact (no coatings)
  • during pulling in a direction perpendicular to the plane
  • in stable room temperature

Lifting capacity in real conditions – factors

During everyday use, the real power depends on a number of factors, listed from most significant:
  • Gap (betwixt the magnet and the metal), as even a microscopic distance (e.g. 0.5 mm) can cause a decrease in force by up to 50% (this also applies to paint, rust or dirt).
  • Pull-off angle – remember that the magnet holds strongest perpendicularly. Under sliding down, the holding force drops drastically, often to levels of 20-30% of the maximum value.
  • Plate thickness – too thin steel causes magnetic saturation, causing part of the flux to be lost to the other side.
  • Material composition – different alloys reacts the same. Alloy additives weaken the interaction with the magnet.
  • Surface condition – ground elements ensure maximum contact, which increases field saturation. Uneven metal weaken the grip.
  • Temperature – heating the magnet causes a temporary drop of force. Check the thermal limit for a given model.

Lifting capacity testing was conducted on a smooth plate of optimal thickness, under perpendicular forces, whereas under attempts to slide the magnet the holding force is lower. In addition, even a small distance between the magnet’s surface and the plate lowers the holding force.

Safety rules for work with NdFeB magnets
Crushing force

Protect your hands. Two large magnets will snap together immediately with a force of massive weight, crushing anything in their path. Exercise extreme caution!

Danger to pacemakers

Individuals with a ICD must maintain an absolute distance from magnets. The magnetic field can interfere with the operation of the implant.

Handling rules

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

Skin irritation risks

Warning for allergy sufferers: The nickel-copper-nickel coating contains nickel. If skin irritation happens, immediately stop working with magnets and wear gloves.

Electronic hazard

Very strong magnetic fields can erase data on payment cards, hard drives, and storage devices. Keep a distance of at least 10 cm.

Product not for children

Strictly keep magnets out of reach of children. Choking hazard is high, and the consequences of magnets clamping inside the body are tragic.

Heat warning

Monitor thermal conditions. Exposing the magnet above 80 degrees Celsius will ruin its magnetic structure and strength.

Dust explosion hazard

Combustion risk: Neodymium dust is highly flammable. Avoid machining magnets in home conditions as this risks ignition.

Protective goggles

NdFeB magnets are sintered ceramics, which means they are very brittle. Collision of two magnets will cause them breaking into small pieces.

Magnetic interference

Be aware: rare earth magnets produce a field that disrupts sensitive sensors. Maintain a safe distance from your phone, device, and navigation systems.

Warning! Looking for details? Check our post: Are neodymium magnets dangerous?
Dhit sp. z o.o.

e-mail: bok@dhit.pl

tel: +48 888 99 98 98