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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

see properties »

32.10 ZŁ with VAT / pcs + price for transport

26.10 ZŁ net + 23% VAT / pcs

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Technical parameters - 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 assembly - technical parameters

The following values constitute the result of a physical analysis. Values were calculated on models for the class Nd2Fe14B. Operational conditions might slightly differ. Use these data as a supplementary guide when designing systems.

Table 1: Static pull force (pull vs gap) - interaction chart
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
 weak grip
50 mm 132 Gs
13.2 mT
 0.05 kg / 0.12 pounds
52.4 g / 0.5 N
 weak grip
Magnetic force decreases drastically per each millimeter of spacing. Remember that even the smallest gap (e.g., contamination, paint, dust) strongly weakens the grip. Magnets operate most effectively in perfect adhesion; gap kills the force. Notice how flashily the load capacity plummet, when the product does not adhere directly to the metal substrate. When designing the assembly, avoid unnecessary gaps.

Table 2: Vertical hold (vertical surface)
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
The table below presents the estimated force needed to start the sliding of the magnet down on a upright metal surface (considering typical friction coefficient). The holding force varies with the distance between the magnet and the metal.

Table 3: Wall mounting (shearing) - 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 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 holder on a vertical wall (e.g., a board), it you can count on only approx. 1/5 of its nominal power. Gravitational force and a low friction coefficient cause that holders slide down easier than they pull off. Want to create a hanger? Remember that the sliding force is noticeably lower than the maximum static pull force. On a painted metal, the holder will slide down under a much lighter weight. Using a rubber layer can drastically increase the grip.

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 not enough to take in the full magnetic flux, which wastes potential of the magnet. If you attach a powerful product to a thin surface, the magnetism will penetrate right through and the pull force will drop sharply. To utilize the maximum of this neodymium's power, you require a sufficiently solid backing of metal. The saturation effect causes that on delicate walls (e.g., thin profiles), the magnet holds weaker. We recommend selecting the steel dimension from these parameters.

Table 5: Thermal resistance (material behavior) - 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 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
Classic neodymiums change their properties parameters past the thermal threshold. Avoid high temperatures – high temperature can permanently demagnetize this magnet. As the temperature rises, the magnet's capacity briefly drops. Do not use this product close to heaters exceeding its safe range. Exceeding the critical threshold will result in destruction of magnetism.
*Important note: Heat tolerance depends not only on the material grade, and the Permeance Coefficient Pc. Thin magnets (low Pc) may lose charge permanently at lower temperatures compared to rod magnets. The danger warning in the table signals a risk of irreversible loss for this specific geometry.

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

Gap (mm) Attraction (kg/lbs) (N-S) Lateral Force (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 magnets attract each other from a significantly greater distance than a magnet and steel combination. Such a system of two magnets produces a massive flux and a further horizon of action. Planning to create a powerful holder? Apply two magnets instead of one magnet and a steel. Be careful that when connecting a pair of magnets, the collision energy is extreme. The levitation is slightly lower than the attraction, but still large.
*Flux density between like poles drops to ~0 Gs in the exact middle between the magnets (due to field cancellation).
Important: Estimates demonstrate friction force of dual identical neodymium magnets (friction coefficient ~0.15 for Ni-Ni layer).

Table 7: Protective zones (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
Mechanical watch 20 Gs (2.0 mT) 10.5 cm
Phone / Smartphone 40 Gs (4.0 mT) 8.0 cm
Remote 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 IT equipment and pacemakers. These NdFeB products generate a field that destroys function of digital equipment. Notice: the unseen radiation acts through matter and plastic. Exceptional care must be taken by people with hearing aids and insulin pumps. Influence will be felt by: automatic timepieces, remotes, membranes, and screens. Avoid contact with magnetic cards, HDD media, 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
NdFeB products are prone to chipping – a collision with steel risks their cracking. Pay attention to connection velocity – a neodymium left loose turns into a projectile. Impact energy can trigger coating fragments or painful pinches to fingers. Always hold the magnet during installation so it doesn't hit violently against the steel surface. A contact at a velocity of dozens of km/h means shattering of the magnet. Use safety goggles when handling with large magnets.

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)
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: Electrical data (Flux)
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 magnet's operating point.

Table 11: Physics of underwater searching
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%
Corrosion 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. Buoyancy helps in lifting finds.
1. Wall mount (shear)

*Caution: On a vertical surface, the magnet retains just ~20% of its perpendicular strength.

2. Steel thickness impact

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

3. Power loss vs temp

*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) = 0.42

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 specification and ecology
Material specification
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: 010060-2026
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The offered product is an incredibly powerful cylindrical magnet, composed of advanced NdFeB material, which, at dimensions of Ø38x12 mm, guarantees the highest energy density. This specific item is characterized by high dimensional repeatability and professional build quality, making it an excellent 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 warehouse in Poland, ensuring quick order fulfillment. Additionally, its triple-layer Ni-Cu-Ni coating secures it against corrosion in typical operating conditions, guaranteeing an aesthetic appearance and durability for years.
This model is perfect for building generators, advanced sensors, and efficient magnetic separators, where maximum induction 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 low weight is crucial.
Since our magnets have a very precise dimensions, the recommended way is to glue them into holes with a slightly larger diameter (e.g., 38.1 mm) using two-component epoxy glues. To ensure stability in industry, specialized industrial adhesives are used, which do not react with the nickel coating and fill the gap, guaranteeing durability of the connection.
Magnets N38 are strong enough for 90% of applications in modeling and machine building, where excessive miniaturization with maximum force is not required. If you need the strongest 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.
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 oxidation, 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. Such an arrangement is most desirable when connecting magnets in stacks (e.g., in filters) or when mounting in sockets at the bottom of a hole. On request, we can also produce versions magnetized through the diameter if your project requires it.

Strengths and weaknesses of rare earth magnets.

Pros

Besides their exceptional pulling force, neodymium magnets offer the following advantages:
  • They retain attractive force for nearly ten years – the drop is just ~1% (according to analyses),
  • They retain their magnetic properties even under close interference source,
  • A magnet with a metallic silver surface is more attractive,
  • Magnetic induction on the surface of the magnet remains exceptional,
  • Through (adequate) combination of ingredients, they can achieve high thermal strength, enabling action at temperatures approaching 230°C and above...
  • Thanks to modularity in forming and the capacity to adapt to individual projects,
  • Huge importance in modern technologies – they are commonly used in hard drives, electric drive systems, medical equipment, as well as technologically advanced constructions.
  • Thanks to concentrated force, small magnets offer high operating force, occupying minimum space,

Cons

Drawbacks and weaknesses of neodymium magnets and ways of using them
  • To avoid cracks under impact, we recommend using special steel holders. Such a solution protects the magnet and simultaneously improves its durability.
  • Neodymium magnets decrease their strength under the influence of heating. As soon as 80°C is exceeded, many of them start losing their power. Therefore, we recommend our special magnets marked [AH], which maintain stability even at temperatures up to 230°C
  • They oxidize in a humid environment - during use outdoors we advise using waterproof magnets e.g. in rubber, plastic
  • We suggest a housing - magnetic holder, due to difficulties in realizing nuts inside the magnet and complex forms.
  • Possible danger to health – tiny shards of magnets can be dangerous, when accidentally swallowed, which is particularly important in the context of child safety. Additionally, small elements of these magnets are able to disrupt the diagnostic process medical after entering the body.
  • High unit price – neodymium magnets are more expensive than other types of magnets (e.g. ferrite), which can limit application in large quantities

Lifting parameters

Maximum lifting capacity of the magnet – what contributes to it?

The lifting capacity listed is a theoretical maximum value executed under specific, ideal conditions:
  • using a plate made of high-permeability steel, acting as a circuit closing element
  • with a cross-section of at least 10 mm
  • with a surface free of scratches
  • without any clearance between the magnet and steel
  • during detachment in a direction vertical to the plane
  • at temperature approx. 20 degrees Celsius

Key elements affecting lifting force

Real force is affected by specific conditions, such as (from most important):
  • Distance – existence of foreign body (paint, tape, air) interrupts the magnetic circuit, which reduces capacity steeply (even by 50% at 0.5 mm).
  • Pull-off angle – note that the magnet holds strongest perpendicularly. Under sliding down, the capacity drops significantly, often to levels of 20-30% of the nominal value.
  • Plate thickness – too thin sheet causes magnetic saturation, causing part of the flux to be wasted into the air.
  • Material type – the best choice is pure iron steel. Hardened steels may have worse magnetic properties.
  • Smoothness – ideal contact is obtained only on polished steel. Any scratches and bumps create air cushions, reducing force.
  • Temperature – temperature increase causes a temporary drop of force. Check the thermal limit for a given model.

Lifting capacity was measured by applying a polished steel plate of suitable thickness (min. 20 mm), under vertically applied force, however under parallel forces the load capacity is reduced by as much as 75%. Moreover, even a slight gap between the magnet’s surface and the plate decreases the load capacity.

Safe handling of neodymium magnets
Mechanical processing

Drilling and cutting of NdFeB material poses a fire risk. Magnetic powder reacts violently with oxygen and is hard to extinguish.

Material brittleness

NdFeB magnets are sintered ceramics, which means they are fragile like glass. Impact of two magnets will cause them breaking into shards.

Do not overheat magnets

Regular neodymium magnets (grade N) lose power when the temperature goes above 80°C. The loss of strength is permanent.

Powerful field

Before starting, read the rules. Sudden snapping can break the magnet or hurt your hand. Think ahead.

Warning for heart patients

Warning for patients: Strong magnetic fields disrupt electronics. Maintain minimum 30 cm distance or request help to handle the magnets.

Magnetic interference

A strong magnetic field disrupts the functioning of compasses in phones and navigation systems. Maintain magnets close to a smartphone to avoid damaging the sensors.

Crushing risk

Pinching hazard: The pulling power is so great that it can cause blood blisters, crushing, and broken bones. Protective gloves are recommended.

Swallowing risk

Product intended for adults. Tiny parts pose a choking risk, leading to severe trauma. Keep away from children and animals.

Cards and drives

Very strong magnetic fields can corrupt files on payment cards, hard drives, and other magnetic media. Stay away of at least 10 cm.

Nickel coating and allergies

It is widely known that the nickel plating (standard magnet coating) is a common allergen. If you have an allergy, refrain from touching magnets with bare hands or select coated magnets.

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