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MW 38x12 / N38 - cylindrical magnet

cylindrical magnet

Catalog no 010060

GTIN/EAN: 5906301810599

Diameter Ø

38 mm [±0,1 mm]

Height

12 mm [±0,1 mm]

Weight

102.07 g

Magnetization Direction

↑ axial

Load capacity

32.79 kg / 321.71 N

Magnetic Induction

331.00 mT / 3310 Gs

Coating

[NiCuNi] Nickel

technical specifications »

32.10 ZŁ with VAT / pcs + price for transport

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Technical of the product - MW 38x12 / N38 - cylindrical magnet

Specification / characteristics - MW 38x12 / N38 - cylindrical magnet

properties
properties values
Cat. no. 010060
GTIN/EAN 5906301810599
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 38 mm [±0,1 mm]
Height 12 mm [±0,1 mm]
Weight 102.07 g
Magnetization Direction ↑ axial
Load capacity ~ ? 32.79 kg / 321.71 N
Magnetic Induction ~ ? 331.00 mT / 3310 Gs
Coating [NiCuNi] Nickel
Manufacturing Tolerance ±0.1 mm

Magnetic properties of material N38

Specification / characteristics MW 38x12 / 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 - technical parameters

Presented data are the result of a engineering calculation. Results were calculated on algorithms for the material Nd2Fe14B. Operational parameters might slightly differ. Use these data as a preliminary roadmap for designers.

Table 1: Static pull force (force vs distance) - power drop
MW 38x12 / N38

Distance (mm) Induction (Gauss) / mT Pull Force (kg/lbs/g/N) Risk Status
0 mm 3309 Gs
330.9 mT
 32.79 kg / 72.29 lbs
32790.0 g / 321.7 N
 crushing
1 mm 3175 Gs
317.5 mT
 30.18 kg / 66.54 lbs
30182.9 g / 296.1 N
 crushing
2 mm 3029 Gs
302.9 mT
 27.46 kg / 60.55 lbs
27464.0 g / 269.4 N
 crushing
3 mm 2875 Gs
287.5 mT
 24.74 kg / 54.55 lbs
24742.8 g / 242.7 N
 crushing
5 mm 2556 Gs
255.6 mT
 19.56 kg / 43.13 lbs
19563.2 g / 191.9 N
 crushing
10 mm 1805 Gs
180.5 mT
 9.75 kg / 21.50 lbs
9750.4 g / 95.7 N
 medium risk
15 mm 1229 Gs
122.9 mT
 4.52 kg / 9.96 lbs
4519.1 g / 44.3 N
 medium risk
20 mm 836 Gs
83.6 mT
 2.09 kg / 4.61 lbs
2092.9 g / 20.5 N
 medium risk
30 mm 411 Gs
41.1 mT
 0.51 kg / 1.11 lbs
505.7 g / 5.0 N
 weak grip
50 mm 132 Gs
13.2 mT
 0.05 kg / 0.12 lbs
52.4 g / 0.5 N
 weak grip
Pulling power decreases significantly per each millimeter of distance. Note that even the smallest gap (e.g., contamination, varnish, veneer) strongly diminishes the holding power. Magnets hold most effectively at the point of direct contact; distance drastically cuts the power. See how quickly the load capacity fall, when the magnet does not adhere tightly to the steel surface. When planning the assembly, eliminate additional spacers.

Table 2: Sliding load (wall)
MW 38x12 / N38

Distance (mm) Friction coefficient Pull Force (kg/lbs/g/N)
0 mm Stal (~0.2) 6.56 kg / 14.46 lbs
6558.0 g / 64.3 N
1 mm Stal (~0.2) 6.04 kg / 13.31 lbs
6036.0 g / 59.2 N
2 mm Stal (~0.2) 5.49 kg / 12.11 lbs
5492.0 g / 53.9 N
3 mm Stal (~0.2) 4.95 kg / 10.91 lbs
4948.0 g / 48.5 N
5 mm Stal (~0.2) 3.91 kg / 8.62 lbs
3912.0 g / 38.4 N
10 mm Stal (~0.2) 1.95 kg / 4.30 lbs
1950.0 g / 19.1 N
15 mm Stal (~0.2) 0.90 kg / 1.99 lbs
904.0 g / 8.9 N
20 mm Stal (~0.2) 0.42 kg / 0.92 lbs
418.0 g / 4.1 N
30 mm Stal (~0.2) 0.10 kg / 0.22 lbs
102.0 g / 1.0 N
50 mm Stal (~0.2) 0.01 kg / 0.02 lbs
10.0 g / 0.1 N
This section shows the estimated shear load sufficient to start the slippage of the magnet vertically on a upright steel plate (assuming typical friction). The holding force varies with the gap size between the magnet and the surface.

Table 3: Wall mounting (sliding) - vertical pull
MW 38x12 / N38

Surface type Friction coefficient / % Mocy Max load (kg/lbs/g/N)
Raw steel
µ = 0.3 30% Nominalnej Siły
9.84 kg / 21.69 lbs
9837.0 g / 96.5 N
Painted steel (standard)
µ = 0.2 20% Nominalnej Siły
6.56 kg / 14.46 lbs
6558.0 g / 64.3 N
Oily/slippery steel
µ = 0.1 10% Nominalnej Siły
3.28 kg / 7.23 lbs
3279.0 g / 32.2 N
Magnet with anti-slip rubber
µ = 0.5 50% Nominalnej Siły
16.40 kg / 36.14 lbs
16395.0 g / 160.8 N
When hanging a holder on a upright surface (e.g., a board), it will only hold barely about 20%-30% of its nominal power. Gravitational force and a low friction coefficient influence the fact that holders slide down easier than they detach. Want to create a vertical fastening? Remember that the shear force is noticeably lower than the perpendicular breakaway force. On a smooth steel, the holder will slip down under a noticeably lighter weight. Utilizing a rubberized layer can drastically increase the grip.

Table 4: Steel thickness (substrate influence) - power losses
MW 38x12 / N38

Steel thickness (mm) % power Real pull force (kg/lbs/g/N)
0.5 mm
5%
 1.64 kg / 3.61 lbs
1639.5 g / 16.1 N
1 mm
13%
 4.10 kg / 9.04 lbs
4098.8 g / 40.2 N
2 mm
25%
 8.20 kg / 18.07 lbs
8197.5 g / 80.4 N
3 mm
38%
 12.30 kg / 27.11 lbs
12296.3 g / 120.6 N
5 mm
63%
 20.49 kg / 45.18 lbs
20493.8 g / 201.0 N
10 mm
100%
 32.79 kg / 72.29 lbs
32790.0 g / 321.7 N
11 mm
100%
 32.79 kg / 72.29 lbs
32790.0 g / 321.7 N
12 mm
100%
 32.79 kg / 72.29 lbs
32790.0 g / 321.7 N
A thin metal plate cannot focus the full magnetic flux, which wastes potential of the magnet. If you attach a powerful product to a thin surface, the magnetism will pass right through and the pull force will drop sharply. To achieve the maximum of this neodymium's power, you need a suitably thick backing of steel. The saturation effect causes that on delicate walls (e.g., thin profiles), the product holds weaker. We advise picking the steel dimension from these parameters.

Table 5: Thermal resistance (stability) - thermal limit
MW 38x12 / N38

Ambient temp. (°C) Power loss Remaining pull (kg/lbs/g/N) Status
20 °C 0.0% 32.79 kg / 72.29 lbs
32790.0 g / 321.7 N
 OK
40 °C -2.2% 32.07 kg / 70.70 lbs
32068.6 g / 314.6 N
 OK
60 °C -4.4% 31.35 kg / 69.11 lbs
31347.2 g / 307.5 N
80 °C -6.6% 30.63 kg / 67.52 lbs
30625.9 g / 300.4 N
100 °C -28.8% 23.35 kg / 51.47 lbs
23346.5 g / 229.0 N
Classic neodymiums change their properties strength above the temperature limit. Avoid high temperatures – heat can permanently demagnetize this product. With increasing heat, the magnet's force momentarily drops. Avoid using this product close to ovens exceeding its operating temperature limit. Too high temperature will result in permanent loss of magnetism.
*Technical advisory: Heat tolerance is determined by both grade, and the Permeance Coefficient Pc. Flat magnets (low permeance coefficient) are more susceptible to demagnetization at lower temperatures compared to rod magnets. Red status in the table signals permanent field degradation for this particular item.

Table 6: Magnet-Magnet interaction (repulsion) - forces in the system
MW 38x12 / N38

Gap (mm) Attraction (kg/lbs) (N-S) Shear Force (kg/lbs/g/N) Repulsion (kg/lbs) (N-N)
0 mm 76.58 kg / 168.83 lbs
4 859 Gs
11.49 kg / 25.32 lbs
11487 g / 112.7 N
 N/A
1 mm 73.60 kg / 162.27 lbs
6 489 Gs
11.04 kg / 24.34 lbs
11040 g / 108.3 N
 66.24 kg / 146.04 lbs
~0 Gs
2 mm 70.49 kg / 155.40 lbs
6 350 Gs
10.57 kg / 23.31 lbs
10573 g / 103.7 N
 63.44 kg / 139.86 lbs
~0 Gs
3 mm 67.33 kg / 148.43 lbs
6 206 Gs
10.10 kg / 22.26 lbs
10099 g / 99.1 N
 60.59 kg / 133.59 lbs
~0 Gs
5 mm 60.95 kg / 134.38 lbs
5 905 Gs
9.14 kg / 20.16 lbs
9143 g / 89.7 N
 54.86 kg / 120.94 lbs
~0 Gs
10 mm 45.69 kg / 100.73 lbs
5 113 Gs
6.85 kg / 15.11 lbs
6853 g / 67.2 N
 41.12 kg / 90.65 lbs
~0 Gs
20 mm 22.77 kg / 50.20 lbs
3 609 Gs
3.42 kg / 7.53 lbs
3416 g / 33.5 N
 20.49 kg / 45.18 lbs
~0 Gs
50 mm 2.34 kg / 5.17 lbs
1 158 Gs
0.35 kg / 0.78 lbs
352 g / 3.5 N
 2.11 kg / 4.65 lbs
~0 Gs
60 mm 1.18 kg / 2.60 lbs
822 Gs
0.18 kg / 0.39 lbs
177 g / 1.7 N
 1.06 kg / 2.34 lbs
~0 Gs
70 mm 0.63 kg / 1.38 lbs
598 Gs
0.09 kg / 0.21 lbs
94 g / 0.9 N
 0.56 kg / 1.24 lbs
~0 Gs
80 mm 0.35 kg / 0.77 lbs
446 Gs
0.05 kg / 0.12 lbs
52 g / 0.5 N
 0.31 kg / 0.69 lbs
~0 Gs
90 mm 0.20 kg / 0.45 lbs
340 Gs
0.03 kg / 0.07 lbs
30 g / 0.3 N
 0.18 kg / 0.40 lbs
~0 Gs
100 mm 0.12 kg / 0.27 lbs
264 Gs
0.02 kg / 0.04 lbs
18 g / 0.2 N
 0.11 kg / 0.24 lbs
~0 Gs
Two magnets interact from a significantly greater distance than a magnet and steel setup. Such a system of two magnets creates a more powerful interaction and a wider radius of operation. Want to build a powerful holder? Use a pair of magnets instead of a neodymium and a striker plate. Be careful that when bringing together two magnets, the impact force is massive. The repulsion force is a bit weaker than the attraction, but still impressive.
*Field value between like poles is approximately ~0 Gs in the exact middle between the magnets (caused by magnetic field nullification).
* Results apply to sliding force of two same neodymium magnets (friction ~0.15 for Ni-Ni layer).

Table 7: Protective zones (electronics) - precautionary measures
MW 38x12 / N38

Object / Device Limit (Gauss) / mT Safe distance
Pacemaker 5 Gs (0.5 mT) 17.0 cm
Hearing aid 10 Gs (1.0 mT) 13.5 cm
Mechanical watch 20 Gs (2.0 mT) 10.5 cm
Mobile device 40 Gs (4.0 mT) 8.0 cm
Car key 50 Gs (5.0 mT) 7.5 cm
Payment card 400 Gs (40.0 mT) 3.5 cm
HDD hard drive 600 Gs (60.0 mT) 2.5 cm
Extremely neodym field poses a large risk to electronic devices and medical implants. These magnets produce a flux that prevents correct functioning of digital equipment. Remember: the unseen radiation acts through matter and plastic. Increased vigilance must be taken by people with cochlear implants and drug dispensers. Also at risk are: mechanical watches, car keys, speakers, and screens. Do not bring the product near payment cards, hard drives, or sensitive navigation tools.

Table 8: Collisions (cracking risk) - collision effects
MW 38x12 / N38

Start from (mm) Speed (km/h) Energy (J) Predicted outcome
10 mm 21.17 km/h
(5.88 m/s)
 1.76 J
30 mm 31.61 km/h
(8.78 m/s)
 3.93 J
50 mm 40.46 km/h
(11.24 m/s)
 6.45 J
100 mm 57.16 km/h
(15.88 m/s)
 12.87 J
Magnetic elements are prone to chipping – a strong collision with metal causes immediate chipping. Pay attention to connection velocity – a neodymium left loose becomes dangerous. Striking energy can destroy the magnet or dangerous crushing to fingers. Be sure to control the product during installation so it doesn't hit violently against the steel surface. A contact at a velocity of dozens of km/h almost guarantees destruction of the neodymium. Wear safety glasses when working with powerful specimens.

Table 9: Anti-corrosion coating durability
MW 38x12 / 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. Improper coating selection is the most common cause of magnet failure over time.

Table 10: Construction data (Flux)
MW 38x12 / N38

Parameter Value SI Unit / Description
Magnetic Flux 40 045 Mx 400.5 µWb
Pc Coefficient 0.42 Low (Flat)
Total magnetic flux emitted by the pole surface. Key data in coil applications and motors. The Pc coefficient defines the magnet's operating point.

Table 11: Hydrostatics and buoyancy
MW 38x12 / N38

Environment Effective steel pull Effect
Air (land) 32.79 kg Standard
Water (riverbed) 37.54 kg
(+4.75 kg buoyancy gain)
+14.5%
Rust risk: Standard nickel requires drying after every contact with moisture; lack of maintenance will lead to rust spots.
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 merely approx. 20-30% of its perpendicular strength.

2. Plate thickness effect

*Thin metal sheet (e.g. computer case) significantly limits 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) = 0.42

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.

Technical and environmental data
Chemical composition
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: 010060-2026
Magnet Unit Converter
Force (pull)
Magnetic Induction
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The offered product is an extremely powerful cylinder magnet, composed of durable NdFeB material, which, at dimensions of Ø38x12 mm, guarantees the highest energy density. The MW 38x12 / N38 component 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. 32.79 kg), this product is in stock from our warehouse in Poland, ensuring quick order fulfillment. Additionally, its Ni-Cu-Ni coating effectively protects it against corrosion in standard operating conditions, ensuring an aesthetic appearance and durability for years.
It successfully proves itself in modeling, advanced robotics, and broadly understood industry, serving as a positioning or actuating element. Thanks to the high power of 321.71 N with a weight of only 102.07 g, this rod is indispensable in electronics and wherever every gram matters.
Due to the brittleness of the NdFeB material, we absolutely advise against force-fitting (so-called press-fit), as this risks chipping the coating of this professional component. 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 popular 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 (Ø38x12), 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 38 mm and height 12 mm. The value of 321.71 N means that the magnet is capable of holding a weight many times exceeding its own mass of 102.07 g. The product has a [NiCuNi] coating, which secures it against external factors, giving it an aesthetic, silvery shine.
This cylinder is magnetized axially (along the height of 12 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 through the diameter if your project requires it.

Pros and cons of rare earth magnets.

Benefits

Besides their tremendous strength, neodymium magnets offer the following advantages:
  • They retain attractive force for almost ten years – the drop is just ~1% (based on simulations),
  • They are extremely resistant to demagnetization induced by presence of other magnetic fields,
  • By using a decorative layer of nickel, the element acquires an nice look,
  • They are known for high magnetic induction at the operating surface, which increases their power,
  • Made from properly selected components, these magnets show impressive resistance to high heat, enabling them to function (depending on their form) at temperatures up to 230°C and above...
  • Thanks to freedom in shaping and the ability to customize to complex applications,
  • Wide application in modern industrial fields – they serve a role in HDD drives, electromotive mechanisms, precision medical tools, also multitasking production systems.
  • Compactness – despite small sizes they provide effective action, making them ideal for precision applications

Disadvantages

What to avoid - cons of neodymium magnets and ways of using them
  • At very strong impacts they can break, therefore we recommend placing them in steel cases. A metal housing provides additional protection against damage, as well as increases the magnet's durability.
  • When exposed to high temperature, neodymium magnets experience a drop in strength. Often, when the temperature exceeds 80°C, their power decreases (depending on the size and 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 suggest using waterproof magnets made of rubber, plastic or other material stable to moisture, when using outdoors
  • Due to limitations in realizing threads and complicated forms in magnets, we propose using casing - magnetic holder.
  • Possible danger to health – tiny shards of magnets can be dangerous, if swallowed, which is particularly important in the aspect of protecting the youngest. Furthermore, small components of these magnets can complicate diagnosis medical in case of swallowing.
  • With budget limitations the cost of neodymium magnets can be a barrier,

Pull force analysis

Detachment force of the magnet in optimal conditions – what contributes to it?

Information about lifting capacity is the result of a measurement for ideal contact conditions, taking into account:
  • with the application of a sheet made of low-carbon steel, guaranteeing full magnetic saturation
  • whose thickness reaches at least 10 mm
  • characterized by lack of roughness
  • with direct contact (without coatings)
  • under vertical application of breakaway force (90-degree angle)
  • at temperature approx. 20 degrees Celsius

Practical aspects of lifting capacity – factors

In real-world applications, the actual lifting capacity depends on several key aspects, presented from the most important:
  • Clearance – existence of any layer (rust, dirt, gap) acts as an insulator, which reduces capacity steeply (even by 50% at 0.5 mm).
  • Angle of force application – maximum parameter is obtained only during perpendicular pulling. The shear force of the magnet along the plate is standardly many times lower (approx. 1/5 of the lifting capacity).
  • Element thickness – to utilize 100% power, the steel must be adequately massive. Paper-thin metal restricts the lifting capacity (the magnet "punches through" it).
  • Metal type – different alloys reacts the same. Alloy additives weaken the attraction effect.
  • Surface condition – smooth surfaces ensure maximum contact, which improves field saturation. Uneven metal reduce efficiency.
  • Thermal environment – temperature increase results in weakening of induction. Check the maximum operating temperature for a given model.

Lifting capacity was assessed by applying a smooth steel plate of suitable thickness (min. 20 mm), under vertically applied force, in contrast under shearing force the lifting capacity is smaller. Additionally, even a slight gap between the magnet and the plate reduces the lifting capacity.

Precautions when working with neodymium magnets
Conscious usage

Exercise caution. Rare earth magnets attract from a distance and snap with huge force, often faster than you can move away.

Pinching danger

Danger of trauma: The attraction force is so great that it can cause blood blisters, pinching, and even bone fractures. Protective gloves are recommended.

Eye protection

Beware of splinters. Magnets can explode upon violent connection, launching shards into the air. We recommend safety glasses.

ICD Warning

Patients with a pacemaker should keep an absolute distance from magnets. The magnetic field can disrupt the operation of the life-saving device.

Precision electronics

Remember: neodymium magnets generate a field that interferes with precision electronics. Keep a safe distance from your mobile, tablet, and navigation systems.

Mechanical processing

Fire hazard: Neodymium dust is highly flammable. Do not process magnets without safety gear as this risks ignition.

Avoid contact if allergic

Some people experience a sensitization to Ni, which is the common plating for NdFeB magnets. Prolonged contact may cause dermatitis. We strongly advise wear safety gloves.

No play value

Absolutely keep magnets away from children. Choking hazard is significant, and the consequences of magnets clamping inside the body are very dangerous.

Demagnetization risk

Do not overheat. Neodymium magnets are susceptible to temperature. If you require operation above 80°C, inquire about HT versions (H, SH, UH).

Keep away from computers

Intense magnetic fields can destroy records on payment cards, hard drives, and other magnetic media. Maintain a gap of at least 10 cm.

Caution! Learn more about risks in the article: Magnet Safety Guide.