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MW 12x50 / N38 - cylindrical magnet

cylindrical magnet

Catalog no 010020

GTIN/EAN: 5906301810193

5.00

Diameter Ø

12 mm [±0,1 mm]

Height

50 mm [±0,1 mm]

Weight

42.41 g

Magnetization Direction

↑ axial

Load capacity

2.62 kg / 25.73 N

Magnetic Induction

614.94 mT / 6149 Gs

Coating

[NiCuNi] Nickel

28.29 with VAT / pcs + price for transport

23.00 ZŁ net + 23% VAT / pcs

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Lifting power and structure of neodymium magnets can be analyzed on our force calculator.

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Technical parameters of the product - MW 12x50 / N38 - cylindrical magnet

Specification / characteristics - MW 12x50 / N38 - cylindrical magnet

properties
properties values
Cat. no. 010020
GTIN/EAN 5906301810193
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 12 mm [±0,1 mm]
Height 50 mm [±0,1 mm]
Weight 42.41 g
Magnetization Direction ↑ axial
Load capacity ~ ? 2.62 kg / 25.73 N
Magnetic Induction ~ ? 614.94 mT / 6149 Gs
Coating [NiCuNi] Nickel
Manufacturing Tolerance ±0.1 mm

Magnetic properties of material N38

Specification / characteristics MW 12x50 / 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 assembly - data

Presented values constitute the direct effect of a mathematical simulation. Results are based on models for the material Nd2Fe14B. Operational parameters might slightly differ from theoretical values. Treat these data as a preliminary roadmap for designers.

Table 1: Static pull force (force vs distance) - interaction chart
MW 12x50 / N38

Distance (mm) Induction (Gauss) / mT Pull Force (kg/lbs/g/N) Risk Status
0 mm 6146 Gs
614.6 mT
2.62 kg / 5.78 lbs
2620.0 g / 25.7 N
medium risk
1 mm 5138 Gs
513.8 mT
1.83 kg / 4.04 lbs
1831.5 g / 18.0 N
safe
2 mm 4199 Gs
419.9 mT
1.22 kg / 2.70 lbs
1222.9 g / 12.0 N
safe
3 mm 3388 Gs
338.8 mT
0.80 kg / 1.76 lbs
796.3 g / 7.8 N
safe
5 mm 2194 Gs
219.4 mT
0.33 kg / 0.74 lbs
334.0 g / 3.3 N
safe
10 mm 853 Gs
85.3 mT
0.05 kg / 0.11 lbs
50.4 g / 0.5 N
safe
15 mm 417 Gs
41.7 mT
0.01 kg / 0.03 lbs
12.1 g / 0.1 N
safe
20 mm 239 Gs
23.9 mT
0.00 kg / 0.01 lbs
4.0 g / 0.0 N
safe
30 mm 103 Gs
10.3 mT
0.00 kg / 0.00 lbs
0.7 g / 0.0 N
safe
50 mm 33 Gs
3.3 mT
0.00 kg / 0.00 lbs
0.1 g / 0.0 N
safe

Table 2: Sliding hold (wall)
MW 12x50 / N38

Distance (mm) Friction coefficient Pull Force (kg/lbs/g/N)
0 mm Stal (~0.2) 0.52 kg / 1.16 lbs
524.0 g / 5.1 N
1 mm Stal (~0.2) 0.37 kg / 0.81 lbs
366.0 g / 3.6 N
2 mm Stal (~0.2) 0.24 kg / 0.54 lbs
244.0 g / 2.4 N
3 mm Stal (~0.2) 0.16 kg / 0.35 lbs
160.0 g / 1.6 N
5 mm Stal (~0.2) 0.07 kg / 0.15 lbs
66.0 g / 0.6 N
10 mm Stal (~0.2) 0.01 kg / 0.02 lbs
10.0 g / 0.1 N
15 mm Stal (~0.2) 0.00 kg / 0.00 lbs
2.0 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

Table 3: Wall mounting (shearing) - behavior on slippery surfaces
MW 12x50 / N38

Surface type Friction coefficient / % Mocy Max load (kg/lbs/g/N)
Raw steel
µ = 0.3 30% Nominalnej Siły
0.79 kg / 1.73 lbs
786.0 g / 7.7 N
Painted steel (standard)
µ = 0.2 20% Nominalnej Siły
0.52 kg / 1.16 lbs
524.0 g / 5.1 N
Oily/slippery steel
µ = 0.1 10% Nominalnej Siły
0.26 kg / 0.58 lbs
262.0 g / 2.6 N
Magnet with anti-slip rubber
µ = 0.5 50% Nominalnej Siły
1.31 kg / 2.89 lbs
1310.0 g / 12.9 N

Table 4: Material efficiency (saturation) - sheet metal selection
MW 12x50 / N38

Steel thickness (mm) % power Real pull force (kg/lbs/g/N)
0.5 mm
10%
0.26 kg / 0.58 lbs
262.0 g / 2.6 N
1 mm
25%
0.66 kg / 1.44 lbs
655.0 g / 6.4 N
2 mm
50%
1.31 kg / 2.89 lbs
1310.0 g / 12.9 N
3 mm
75%
1.97 kg / 4.33 lbs
1965.0 g / 19.3 N
5 mm
100%
2.62 kg / 5.78 lbs
2620.0 g / 25.7 N
10 mm
100%
2.62 kg / 5.78 lbs
2620.0 g / 25.7 N
11 mm
100%
2.62 kg / 5.78 lbs
2620.0 g / 25.7 N
12 mm
100%
2.62 kg / 5.78 lbs
2620.0 g / 25.7 N

Table 5: Thermal resistance (stability) - thermal limit
MW 12x50 / N38

Ambient temp. (°C) Power loss Remaining pull (kg/lbs/g/N) Status
20 °C 0.0% 2.62 kg / 5.78 lbs
2620.0 g / 25.7 N
OK
40 °C -2.2% 2.56 kg / 5.65 lbs
2562.4 g / 25.1 N
OK
60 °C -4.4% 2.50 kg / 5.52 lbs
2504.7 g / 24.6 N
OK
80 °C -6.6% 2.45 kg / 5.39 lbs
2447.1 g / 24.0 N
100 °C -28.8% 1.87 kg / 4.11 lbs
1865.4 g / 18.3 N

Table 6: Magnet-Magnet interaction (attraction) - forces in the system
MW 12x50 / N38

Gap (mm) Attraction (kg/lbs) (N-S) Lateral Force (kg/lbs/g/N) Repulsion (kg/lbs) (N-N)
0 mm 26.33 kg / 58.05 lbs
6 179 Gs
3.95 kg / 8.71 lbs
3950 g / 38.7 N
N/A
1 mm 22.19 kg / 48.93 lbs
11 284 Gs
3.33 kg / 7.34 lbs
3329 g / 32.7 N
19.97 kg / 44.04 lbs
~0 Gs
2 mm 18.41 kg / 40.58 lbs
10 277 Gs
2.76 kg / 6.09 lbs
2761 g / 27.1 N
16.57 kg / 36.53 lbs
~0 Gs
3 mm 15.11 kg / 33.30 lbs
9 309 Gs
2.27 kg / 5.00 lbs
2266 g / 22.2 N
13.60 kg / 29.97 lbs
~0 Gs
5 mm 9.94 kg / 21.91 lbs
7 551 Gs
1.49 kg / 3.29 lbs
1491 g / 14.6 N
8.94 kg / 19.72 lbs
~0 Gs
10 mm 3.36 kg / 7.40 lbs
4 389 Gs
0.50 kg / 1.11 lbs
504 g / 4.9 N
3.02 kg / 6.66 lbs
~0 Gs
20 mm 0.51 kg / 1.12 lbs
1 706 Gs
0.08 kg / 0.17 lbs
76 g / 0.7 N
0.46 kg / 1.01 lbs
~0 Gs
50 mm 0.02 kg / 0.04 lbs
303 Gs
0.00 kg / 0.01 lbs
2 g / 0.0 N
0.01 kg / 0.03 lbs
~0 Gs
60 mm 0.01 kg / 0.02 lbs
206 Gs
0.00 kg / 0.00 lbs
1 g / 0.0 N
0.00 kg / 0.00 lbs
~0 Gs
70 mm 0.00 kg / 0.01 lbs
148 Gs
0.00 kg / 0.00 lbs
1 g / 0.0 N
0.00 kg / 0.00 lbs
~0 Gs
80 mm 0.00 kg / 0.00 lbs
110 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
84 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
66 Gs
0.00 kg / 0.00 lbs
0 g / 0.0 N
0.00 kg / 0.00 lbs
~0 Gs

Table 7: Protective zones (implants) - precautionary measures
MW 12x50 / N38

Object / Device Limit (Gauss) / mT Safe distance
Pacemaker 5 Gs (0.5 mT) 11.0 cm
Hearing aid 10 Gs (1.0 mT) 8.5 cm
Mechanical watch 20 Gs (2.0 mT) 6.5 cm
Phone / Smartphone 40 Gs (4.0 mT) 5.0 cm
Car key 50 Gs (5.0 mT) 4.5 cm
Payment card 400 Gs (40.0 mT) 2.0 cm
HDD hard drive 600 Gs (60.0 mT) 1.5 cm

Table 8: Collisions (kinetic energy) - collision effects
MW 12x50 / N38

Start from (mm) Speed (km/h) Energy (J) Predicted outcome
10 mm 8.02 km/h
(2.23 m/s)
0.11 J
30 mm 13.73 km/h
(3.81 m/s)
0.31 J
50 mm 17.73 km/h
(4.92 m/s)
0.51 J
100 mm 25.07 km/h
(6.96 m/s)
1.03 J

Table 9: Corrosion resistance
MW 12x50 / 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)

Table 10: Electrical data (Pc)
MW 12x50 / N38

Parameter Value SI Unit / Description
Magnetic Flux 8 230 Mx 82.3 µWb
Pc Coefficient 1.49 High (Stable)

Table 11: Physics of underwater searching
MW 12x50 / N38

Environment Effective steel pull Effect
Air (land) 2.62 kg Standard
Water (riverbed) 3.00 kg
(+0.38 kg buoyancy gain)
+14.5%
Corrosion warning: Standard nickel requires drying after every contact with moisture; lack of maintenance will lead to rust spots.
1. Sliding resistance

*Note: On a vertical wall, the magnet retains just approx. 20-30% of its perpendicular strength.

2. Steel saturation

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

3. Power loss vs temp

*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) = 1.49

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
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: 010020-2026
Measurement Calculator
Pulling force

Field Strength

Other proposals

The presented product is a very strong cylinder magnet, produced from advanced NdFeB material, which, at dimensions of Ø12x50 mm, guarantees maximum efficiency. This specific item is characterized by an accuracy of ±0.1mm and professional build quality, making it a perfect solution for the most demanding engineers and designers. As a magnetic rod with impressive force (approx. 2.62 kg), this product is in stock from our European logistics center, ensuring quick order fulfillment. Furthermore, its triple-layer Ni-Cu-Ni coating secures it against corrosion in typical operating conditions, guaranteeing an aesthetic appearance and durability for years.
It finds application in DIY projects, advanced robotics, and broadly understood industry, serving as a positioning or actuating element. Thanks to the high power of 25.73 N with a weight of only 42.41 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 precision component. To ensure stability 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 industrial neodymium magnets, offering a great economic balance and high resistance to demagnetization. If you need the strongest magnets in the same volume (Ø12x50), contact us regarding higher grades (e.g., N50, N52), however, N38 is the standard in continuous sale in our warehouse.
This model is characterized by dimensions Ø12x50 mm, which, at a weight of 42.41 g, makes it an element with high magnetic energy density. The value of 25.73 N means that the magnet is capable of holding a weight many times exceeding its own mass of 42.41 g. The product has a [NiCuNi] coating, which protects the surface against oxidation, 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 12 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.

Pros as well as cons of neodymium magnets.

Pros

Apart from their consistent magnetic energy, neodymium magnets have these key benefits:
  • They have stable power, and over more than 10 years their performance decreases symbolically – ~1% (in testing),
  • Neodymium magnets are exceptionally resistant to magnetic field loss caused by magnetic disturbances,
  • Thanks to the metallic finish, the layer of Ni-Cu-Ni, gold, or silver-plated gives an modern appearance,
  • 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 form) at temperatures up to 230°C and above...
  • Thanks to the option of accurate molding and adaptation to unique projects, NdFeB magnets can be created in a variety of forms and dimensions, which amplifies use scope,
  • Significant place in electronics industry – they are utilized in magnetic memories, brushless drives, advanced medical instruments, as well as technologically advanced constructions.
  • Thanks to their power density, small magnets offer high operating force, in miniature format,

Disadvantages

What to avoid - cons of neodymium magnets and proposals for their use:
  • At strong impacts they can break, therefore we recommend placing them in strong housings. A metal housing provides additional protection against damage, as well as increases the magnet's durability.
  • Neodymium magnets decrease their force 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 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
  • Limited ability of creating nuts in the magnet and complex shapes - preferred is a housing - magnet mounting.
  • Possible danger to health – tiny shards of magnets can be dangerous, if swallowed, which gains importance in the aspect of protecting the youngest. It is also worth noting that small elements of these devices are able to disrupt the diagnostic process medical in case of swallowing.
  • With budget limitations the cost of neodymium magnets is a challenge,

Pull force analysis

Maximum magnetic pulling forcewhat affects it?

The force parameter is a theoretical maximum value conducted under specific, ideal conditions:
  • on a plate made of mild steel, effectively closing the magnetic field
  • with a cross-section minimum 10 mm
  • characterized by lack of roughness
  • under conditions of gap-free contact (metal-to-metal)
  • for force applied at a right angle (in the magnet axis)
  • at room temperature

Magnet lifting force in use – key factors

Holding efficiency impacted by working environment parameters, including (from priority):
  • Space between magnet and steel – even a fraction of a millimeter of separation (caused e.g. by varnish or dirt) diminishes the magnet efficiency, often by half at just 0.5 mm.
  • Pull-off angle – note that the magnet has greatest strength perpendicularly. Under shear forces, the holding force drops significantly, often to levels of 20-30% of the maximum value.
  • Element thickness – for full efficiency, the steel must be adequately massive. Paper-thin metal restricts the attraction force (the magnet "punches through" it).
  • Metal type – not every steel attracts identically. High carbon content weaken the interaction with the magnet.
  • Base smoothness – the smoother and more polished the surface, the better the adhesion and stronger the hold. Unevenness creates an air distance.
  • Temperature influence – high temperature reduces pulling force. Too high temperature can permanently damage the magnet.

Lifting capacity testing was conducted on a smooth plate of suitable thickness, under a perpendicular pulling force, whereas under shearing force the lifting capacity is smaller. In addition, even a minimal clearance between the magnet and the plate decreases the lifting capacity.

Safety rules for work with neodymium magnets
Do not overheat magnets

Do not overheat. NdFeB magnets are susceptible to heat. If you need resistance above 80°C, look for HT versions (H, SH, UH).

Safe distance

Intense magnetic fields can corrupt files on payment cards, hard drives, and other magnetic media. Keep a distance of at least 10 cm.

Choking Hazard

Always keep magnets out of reach of children. Ingestion danger is high, and the consequences of magnets clamping inside the body are very dangerous.

Nickel coating and allergies

Certain individuals have a contact allergy to Ni, which is the common plating for NdFeB magnets. Extended handling may cause a rash. We recommend use safety gloves.

Serious injuries

Danger of trauma: The attraction force is so immense that it can cause hematomas, pinching, and broken bones. Protective gloves are recommended.

Protective goggles

Despite metallic appearance, neodymium is brittle and cannot withstand shocks. Avoid impacts, as the magnet may crumble into hazardous fragments.

Handling rules

Handle with care. Rare earth magnets act from a distance and snap with massive power, often quicker than you can move away.

Medical implants

Health Alert: Strong magnets can deactivate pacemakers and defibrillators. Do not approach if you have electronic implants.

Impact on smartphones

Navigation devices and smartphones are extremely sensitive to magnetism. Direct contact with a powerful NdFeB magnet can ruin the sensors in your phone.

Machining danger

Powder generated during machining of magnets is self-igniting. Do not drill into magnets without proper cooling and knowledge.

Security! More info about hazards in the article: Magnet Safety Guide.