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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

product parameters »

32.10 ZŁ with VAT / pcs + price for transport

26.10 ZŁ net + 23% VAT / pcs

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Technical specification - 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

Physical simulation of the magnet - technical parameters

These data are the result of a mathematical analysis. Results were calculated on models for the class Nd2Fe14B. Real-world conditions may deviate from the simulation results. Treat these calculations as a preliminary roadmap during assembly planning.

Table 1: Static pull force (force vs gap) - characteristics
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 pounds
32790.0 g / 321.7 N
 critical level
1 mm 3175 Gs
317.5 mT
 30.18 kg / 66.54 pounds
30182.9 g / 296.1 N
 critical level
2 mm 3029 Gs
302.9 mT
 27.46 kg / 60.55 pounds
27464.0 g / 269.4 N
 critical level
3 mm 2875 Gs
287.5 mT
 24.74 kg / 54.55 pounds
24742.8 g / 242.7 N
 critical level
5 mm 2556 Gs
255.6 mT
 19.56 kg / 43.13 pounds
19563.2 g / 191.9 N
 critical level
10 mm 1805 Gs
180.5 mT
 9.75 kg / 21.50 pounds
9750.4 g / 95.7 N
 medium risk
15 mm 1229 Gs
122.9 mT
 4.52 kg / 9.96 pounds
4519.1 g / 44.3 N
 medium risk
20 mm 836 Gs
83.6 mT
 2.09 kg / 4.61 pounds
2092.9 g / 20.5 N
 medium risk
30 mm 411 Gs
41.1 mT
 0.51 kg / 1.11 pounds
505.7 g / 5.0 N
 safe
50 mm 132 Gs
13.2 mT
 0.05 kg / 0.12 pounds
52.4 g / 0.5 N
 safe
Grip strength decreases drastically per each millimeter of spacing. Keep in mind that even the smallest gap (e.g., dirt, varnish, veneer) significantly reduces the pull force. Magnets operate strongest during direct contact; air break weakens the power. Analyze how flashily the load capacity drop, when the product does not adhere flatly to the metal substrate. When planning the assembly, avoid additional spacers.

Table 2: Shear 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 pounds
6558.0 g / 64.3 N
1 mm Stal (~0.2) 6.04 kg / 13.31 pounds
6036.0 g / 59.2 N
2 mm Stal (~0.2) 5.49 kg / 12.11 pounds
5492.0 g / 53.9 N
3 mm Stal (~0.2) 4.95 kg / 10.91 pounds
4948.0 g / 48.5 N
5 mm Stal (~0.2) 3.91 kg / 8.62 pounds
3912.0 g / 38.4 N
10 mm Stal (~0.2) 1.95 kg / 4.30 pounds
1950.0 g / 19.1 N
15 mm Stal (~0.2) 0.90 kg / 1.99 pounds
904.0 g / 8.9 N
20 mm Stal (~0.2) 0.42 kg / 0.92 pounds
418.0 g / 4.1 N
30 mm Stal (~0.2) 0.10 kg / 0.22 pounds
102.0 g / 1.0 N
50 mm Stal (~0.2) 0.01 kg / 0.02 pounds
10.0 g / 0.1 N
This section presents the estimated shear load needed to initiate the slippage of the magnet down against a upright steel plate (considering typical friction). The holding force is relative to the separation distance between the magnet and the surface.

Table 3: Vertical assembly (shearing) - behavior on slippery surfaces
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 pounds
9837.0 g / 96.5 N
Painted steel (standard)
µ = 0.2 20% Nominalnej Siły
6.56 kg / 14.46 pounds
6558.0 g / 64.3 N
Oily/slippery steel
µ = 0.1 10% Nominalnej Siły
3.28 kg / 7.23 pounds
3279.0 g / 32.2 N
Magnet with anti-slip rubber
µ = 0.5 50% Nominalnej Siły
16.40 kg / 36.14 pounds
16395.0 g / 160.8 N
When placing a magnet on a vertical wall (e.g., a car body), it you can count on only about 1/5 of its nominal power. Gravitational force and a weak degree of grip cause that holders slip faster than they pop off the substrate. Designing a wall mount? Remember that the shear force is noticeably lower than the perpendicular breakaway force. On a slippery surface, the holder will slip down under a much lighter weight. Utilizing a rubberized pad can effectively improve the result.

Table 4: Material efficiency (saturation) - 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 pounds
1639.5 g / 16.1 N
1 mm
13%
 4.10 kg / 9.04 pounds
4098.8 g / 40.2 N
2 mm
25%
 8.20 kg / 18.07 pounds
8197.5 g / 80.4 N
3 mm
38%
 12.30 kg / 27.11 pounds
12296.3 g / 120.6 N
5 mm
63%
 20.49 kg / 45.18 pounds
20493.8 g / 201.0 N
10 mm
100%
 32.79 kg / 72.29 pounds
32790.0 g / 321.7 N
11 mm
100%
 32.79 kg / 72.29 pounds
32790.0 g / 321.7 N
12 mm
100%
 32.79 kg / 72.29 pounds
32790.0 g / 321.7 N
A thin sheet is incapable of absorb the full magnetic flux, which squanders power of the holder. If you attach a powerful product to a thin surface, the flux will penetrate right through and the attraction force will be weaker. To achieve full efficiency of this magnet's potential, you require a sufficiently solid element of steel. The material oversaturation means that on delicate walls (e.g., thin profiles), the holder works worse. We recommend selecting the steel thickness from these parameters.

Table 5: Working in heat (stability) - power drop
MW 38x12 / N38

Ambient temp. (°C) Power loss Remaining pull (kg/lbs/g/N) Status
20 °C 0.0% 32.79 kg / 72.29 pounds
32790.0 g / 321.7 N
 OK
40 °C -2.2% 32.07 kg / 70.70 pounds
32068.6 g / 314.6 N
 OK
60 °C -4.4% 31.35 kg / 69.11 pounds
31347.2 g / 307.5 N
80 °C -6.6% 30.63 kg / 67.52 pounds
30625.9 g / 300.4 N
100 °C -28.8% 23.35 kg / 51.47 pounds
23346.5 g / 229.0 N
Ordinary NdFeB products change their properties power past the thermal threshold. Protect against heat – high temperature can permanently demagnetize this product. With every degree above norm, the neodymium's capacity temporarily lowers. Do not use this product near heat sources exceeding its operating temperature limit. Too high temperature will result in permanent loss of magnetic properties.
*Important note: Temperature resistance is determined by both grade, but also on the magnet's shape. Flat magnets (low Pc) are more susceptible to demagnetization sooner than long magnets. The danger warning in the table indicates permanent field degradation for this particular item.

Table 6: Magnet-Magnet interaction (attraction) - field range
MW 38x12 / N38

Gap (mm) Attraction (kg/lbs) (N-S) Shear Strength (kg/lbs/g/N) Repulsion (kg/lbs) (N-N)
0 mm 76.58 kg / 168.83 pounds
4 859 Gs
11.49 kg / 25.32 pounds
11487 g / 112.7 N
 N/A
1 mm 73.60 kg / 162.27 pounds
6 489 Gs
11.04 kg / 24.34 pounds
11040 g / 108.3 N
 66.24 kg / 146.04 pounds
~0 Gs
2 mm 70.49 kg / 155.40 pounds
6 350 Gs
10.57 kg / 23.31 pounds
10573 g / 103.7 N
 63.44 kg / 139.86 pounds
~0 Gs
3 mm 67.33 kg / 148.43 pounds
6 206 Gs
10.10 kg / 22.26 pounds
10099 g / 99.1 N
 60.59 kg / 133.59 pounds
~0 Gs
5 mm 60.95 kg / 134.38 pounds
5 905 Gs
9.14 kg / 20.16 pounds
9143 g / 89.7 N
 54.86 kg / 120.94 pounds
~0 Gs
10 mm 45.69 kg / 100.73 pounds
5 113 Gs
6.85 kg / 15.11 pounds
6853 g / 67.2 N
 41.12 kg / 90.65 pounds
~0 Gs
20 mm 22.77 kg / 50.20 pounds
3 609 Gs
3.42 kg / 7.53 pounds
3416 g / 33.5 N
 20.49 kg / 45.18 pounds
~0 Gs
50 mm 2.34 kg / 5.17 pounds
1 158 Gs
0.35 kg / 0.78 pounds
352 g / 3.5 N
 2.11 kg / 4.65 pounds
~0 Gs
60 mm 1.18 kg / 2.60 pounds
822 Gs
0.18 kg / 0.39 pounds
177 g / 1.7 N
 1.06 kg / 2.34 pounds
~0 Gs
70 mm 0.63 kg / 1.38 pounds
598 Gs
0.09 kg / 0.21 pounds
94 g / 0.9 N
 0.56 kg / 1.24 pounds
~0 Gs
80 mm 0.35 kg / 0.77 pounds
446 Gs
0.05 kg / 0.12 pounds
52 g / 0.5 N
 0.31 kg / 0.69 pounds
~0 Gs
90 mm 0.20 kg / 0.45 pounds
340 Gs
0.03 kg / 0.07 pounds
30 g / 0.3 N
 0.18 kg / 0.40 pounds
~0 Gs
100 mm 0.12 kg / 0.27 pounds
264 Gs
0.02 kg / 0.04 pounds
18 g / 0.2 N
 0.11 kg / 0.24 pounds
~0 Gs
Two magnetic products attract each other from a much further distance than a neodymium and metal combination. The setup of two magnets creates a more powerful interaction and a wider radius of action. Want to build a solid fastener? Apply two magnets instead of one magnet and a striker plate. Remember that when attracting two neodymiums, the impact force is massive. The repulsion force is marginally weaker than the attraction, but still impressive.
*Flux density for N-N configuration is approximately ~0 Gs at the geometric center between the magnets (due to field cancellation).
* Figures demonstrate shear force of two identical neodymium magnets (friction coefficient ~0.15 for Ni-Ni coating).

Table 7: Safety (HSE) (implants) - 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
Timepiece 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 real danger to electronic devices and medical implants. These neodymiums produce a flux that prevents correct functioning of digital equipment. Remember: the invisible magnetic field penetrates the body and plastic. Special caution must be exercised by people with hearing aids and drug dispensers. The risk also applies to: mechanical watches, car keys, speakers, and displays. Avoid contact with magnetic cards, hard drives, or sensitive navigation tools.

Table 8: Dynamics (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
Neodymium magnets are prone to chipping – a violent impact against metal causes immediate chipping. Control the attraction moment – a neodymium left loose turns into a projectile. Impact energy can destroy the magnet or painful pinches to fingers. Always hold the magnet during installation so it doesn't hit with great force against the steel surface. A collision at high speed almost guarantees destruction of the neodymium. Wear eye protection when working with large magnets.

Table 9: Surface protection spec
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. Moisture resistance is crucial for installations in bathrooms or outdoors.

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

Parameter Value SI Unit / Description
Magnetic Flux 40 045 Mx 400.5 µWb
Pc Coefficient 0.42 Low (Flat)
Flux value passing through the magnet pole. Essential parameter for generator designers as well as sensors. Pc value defines the working geometry.

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%
Warning: Standard nickel requires drying after every contact with moisture; lack of maintenance will lead to rust spots.
Water displaces steel, making heavy objects slightly lighter. However, remember the water resistance when pulling the rope quickly.
1. Sliding resistance

*Note: On a vertical wall, the magnet retains only approx. 20-30% of its max power.

2. Efficiency vs thickness

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

3. Heat tolerance

*For N38 material, the critical 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.

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: 010060-2026
Magnet Unit Converter
Pulling force
Field Strength
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The presented product is an incredibly powerful cylindrical magnet, made from durable NdFeB material, which, at dimensions of Ø38x12 mm, guarantees maximum efficiency. The MW 38x12 / N38 model boasts high dimensional repeatability and professional build quality, making it an ideal solution for the most demanding engineers and designers. As a magnetic rod with impressive force (approx. 32.79 kg), this product is available off-the-shelf from our European logistics center, ensuring quick order fulfillment. Furthermore, its Ni-Cu-Ni coating secures it against corrosion in typical operating conditions, ensuring an aesthetic appearance and durability for years.
This model is ideal for building generators, advanced sensors, and efficient filters, where field concentration on a small surface counts. Thanks to the pull force 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 delicate structure of the ceramic sinter, we absolutely advise against force-fitting (so-called press-fit), as this risks chipping the coating of this precision component. 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 durability 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 (Ø38x12), contact us regarding higher grades (e.g., N50, N52), however, N38 is the standard available off-the-shelf in our warehouse.
This model is characterized by dimensions Ø38x12 mm, which, at a weight of 102.07 g, makes it an element with high magnetic energy density. The key parameter here is the lifting capacity amounting to approximately 32.79 kg (force ~321.71 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 38 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 rare earth magnets.

Pros

In addition to their long-term stability, neodymium magnets provide the following advantages:
  • They virtually do not lose strength, because even after ten years the decline in efficiency is only ~1% (according to literature),
  • They are resistant to demagnetization induced by external field influence,
  • In other words, due to the metallic layer of silver, the element becomes visually attractive,
  • Neodymium magnets achieve maximum magnetic induction on a contact point, which increases force concentration,
  • 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...
  • Possibility of accurate shaping as well as adjusting to concrete needs,
  • Huge importance in modern industrial fields – they find application in HDD drives, motor assemblies, medical equipment, as well as modern systems.
  • Compactness – despite small sizes they offer powerful magnetic field, making them ideal for precision applications

Limitations

Disadvantages of neodymium magnets:
  • They are prone to damage upon heavy impacts. To avoid cracks, it is worth securing magnets using a steel holder. Such protection not only protects the magnet but also increases its resistance to damage
  • NdFeB magnets demagnetize when exposed to high temperatures. After reaching 80°C, many of them experience permanent weakening of strength (a factor is the shape and dimensions of the magnet). We offer magnets specially adapted to work at temperatures up to 230°C marked [AH], which are very resistant to heat
  • Magnets exposed to a humid environment can rust. Therefore during using outdoors, we recommend using waterproof magnets made of rubber, plastic or other material protecting against moisture
  • We recommend a housing - magnetic mount, due to difficulties in producing nuts inside the magnet and complicated shapes.
  • Health risk related to microscopic parts of magnets pose a threat, if swallowed, which is particularly important in the context of child health protection. Furthermore, small components of these magnets are able to complicate diagnosis medical in case of swallowing.
  • Due to complex production process, their price is higher than average,

Lifting parameters

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

The specified lifting capacity represents the maximum value, measured under laboratory conditions, meaning:
  • with the application of a sheet made of special test steel, ensuring full magnetic saturation
  • whose transverse dimension reaches at least 10 mm
  • characterized by even structure
  • with zero gap (no coatings)
  • during detachment in a direction vertical to the mounting surface
  • at room temperature

Practical aspects of lifting capacity – factors

Holding efficiency is affected by specific conditions, mainly (from most important):
  • Space between surfaces – every millimeter of distance (caused e.g. by varnish or unevenness) significantly weakens the pulling force, often by half at just 0.5 mm.
  • Loading method – declared lifting capacity refers to pulling vertically. When applying parallel force, the magnet exhibits much less (often approx. 20-30% of nominal force).
  • Wall thickness – the thinner the sheet, the weaker the hold. Magnetic flux passes through the material instead of generating force.
  • Material type – the best choice is high-permeability steel. Hardened steels may attract less.
  • Plate texture – smooth surfaces guarantee perfect abutment, which increases field saturation. Uneven metal weaken the grip.
  • Thermal factor – high temperature reduces pulling force. Too high temperature can permanently demagnetize the magnet.

Lifting capacity was assessed by applying a smooth steel plate of optimal thickness (min. 20 mm), under perpendicular detachment force, whereas under attempts to slide the magnet the load capacity is reduced by as much as 5 times. Additionally, even a minimal clearance between the magnet and the plate decreases the holding force.

Safety rules for work with NdFeB magnets
Thermal limits

Keep cool. Neodymium magnets are sensitive to temperature. If you require operation above 80°C, inquire about special high-temperature series (H, SH, UH).

Combustion hazard

Drilling and cutting of NdFeB material poses a fire risk. Neodymium dust oxidizes rapidly with oxygen and is difficult to extinguish.

GPS and phone interference

A powerful magnetic field interferes with the functioning of magnetometers in phones and GPS navigation. Keep magnets near a device to prevent breaking the sensors.

Allergic reactions

Some people experience a hypersensitivity to Ni, which is the typical protective layer for NdFeB magnets. Extended handling may cause skin redness. It is best to wear protective gloves.

Conscious usage

Handle with care. Neodymium magnets act from a long distance and connect with huge force, often faster than you can move away.

Danger to the youngest

Always keep magnets away from children. Ingestion danger is significant, and the effects of magnets connecting inside the body are very dangerous.

Crushing force

Big blocks can break fingers in a fraction of a second. Do not put your hand betwixt two attracting surfaces.

Cards and drives

Equipment safety: Strong magnets can damage data carriers and sensitive devices (heart implants, hearing aids, timepieces).

Health Danger

Individuals with a pacemaker should maintain an absolute distance from magnets. The magnetism can interfere with the functioning of the life-saving device.

Risk of cracking

Watch out for shards. Magnets can fracture upon uncontrolled impact, ejecting sharp fragments into the air. Eye protection is mandatory.

Important! Details about hazards in the article: Safety of working with magnets.