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MW 12x50 / N38 - cylindrical magnet

cylindrical magnet

Catalog no 010020

GTIN/EAN: 5906301810193

5.00
Load capacity 2.62 kg / 25.73 N Magnetic Induction 614.94 mT / 6149 Gs
Diameter Ø
12 mm [±0,1 mm]
Height
50 mm [±0,1 mm]
Weight
42.41 g
Magnetization Direction
↑ axial
Coating
[NiCuNi] Nickel

How we measure these parameters — certificates and measurements

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Frequently asked questions

What is the maximum working temperature of a disc magnet?
Standard N-series grades work up to 80 °C. Grades N50, N52 and N54 have a lower limit of 60 °C, because coercivity falls as BHmax rises. Higher temperatures require the H (120 °C), SH (150 °C), UH (180 °C), EH (200 °C) or AH (230 °C) series. Within the working range the magnet loses about 0.11% of its induction per degree, and that loss is reversible.
What is the difference between N38, N42 and N52?
The number after N is the energy product BHmax. Moving from N38 to N52 raises it by several tens of percent, but the real holding force increases by roughly 20%, because force also depends on geometry and on the magnetic circuit. N52 costs about twice as much as N42, so for most mounting work N38–N42 is the best price-to-force ratio.
What is the dimensional tolerance?
±0.1 mm as standard, ±0.05 mm to order. The tolerance is stated next to the dimensions on every product page.

Engineering report for this magnet

Full PDF analysis: pull and shear force, effect of distance, temperature and plate thickness, safety distances and the demagnetization curve.

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Call us now +48 888 99 98 98 alternatively let us know using contact form the contact section.
Specifications and structure of a neodymium magnet can be estimated using our power calculator.

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Technical - 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
Remanence Br ? 12.2-12.6 kGs
Remanence Br ? 1220-1260 mT
Coercivity bHc ? 10.8-11.5 kOe
Coercivity bHc ? 860-915 kA/m
Intrinsic coercivity iHc ≥ 12 kOe
Intrinsic coercivity iHc ≥ 955 kA/m
Energy product BHmax ? 36-38 BH max MGOe
Energy product BHmax ? 287-303 BH max KJ/m
Maximum working 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 310 °C
Curie Temperature TF 590 °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 analysis of the assembly - report

These information constitute the result of a mathematical calculation. Values rely on models for the material Nd2Fe14B. Actual conditions might slightly deviate from the simulation results. Use these data as a reference point for designers.

Table 1: Static pull force (pull vs gap) - power drop
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 pounds
2620.0 g / 25.7 N
warning
1 mm 5138 Gs
513.8 mT
1.83 kg / 4.04 pounds
1831.5 g / 18.0 N
weak grip
2 mm 4199 Gs
419.9 mT
1.22 kg / 2.70 pounds
1222.9 g / 12.0 N
weak grip
3 mm 3388 Gs
338.8 mT
0.80 kg / 1.76 pounds
796.3 g / 7.8 N
weak grip
5 mm 2194 Gs
219.4 mT
0.33 kg / 0.74 pounds
334.0 g / 3.3 N
weak grip
10 mm 853 Gs
85.3 mT
0.05 kg / 0.11 pounds
50.4 g / 0.5 N
weak grip
15 mm 417 Gs
41.7 mT
0.01 kg / 0.03 pounds
12.1 g / 0.1 N
weak grip
20 mm 239 Gs
23.9 mT
0.00 kg / 0.01 pounds
4.0 g / 0.0 N
weak grip
30 mm 103 Gs
10.3 mT
0.00 kg / 0.00 pounds
0.7 g / 0.0 N
weak grip
50 mm 33 Gs
3.3 mT
0.00 kg / 0.00 pounds
0.1 g / 0.0 N
weak grip

Table 2: Slippage 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 pounds
524.0 g / 5.1 N
1 mm Stal (~0.2) 0.37 kg / 0.81 pounds
366.0 g / 3.6 N
2 mm Stal (~0.2) 0.24 kg / 0.54 pounds
244.0 g / 2.4 N
3 mm Stal (~0.2) 0.16 kg / 0.35 pounds
160.0 g / 1.6 N
5 mm Stal (~0.2) 0.07 kg / 0.15 pounds
66.0 g / 0.6 N
10 mm Stal (~0.2) 0.01 kg / 0.02 pounds
10.0 g / 0.1 N
15 mm Stal (~0.2) 0.00 kg / 0.00 pounds
2.0 g / 0.0 N
20 mm Stal (~0.2) 0.00 kg / 0.00 pounds
0.0 g / 0.0 N
30 mm Stal (~0.2) 0.00 kg / 0.00 pounds
0.0 g / 0.0 N
50 mm Stal (~0.2) 0.00 kg / 0.00 pounds
0.0 g / 0.0 N

Table 3: Wall mounting (shearing) - vertical pull
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 pounds
786.0 g / 7.7 N
Painted steel (standard)
µ = 0.2 20% Nominalnej Siły
0.52 kg / 1.16 pounds
524.0 g / 5.1 N
Oily/slippery steel
µ = 0.1 10% Nominalnej Siły
0.26 kg / 0.58 pounds
262.0 g / 2.6 N
Magnet with anti-slip rubber
µ = 0.5 50% Nominalnej Siły
1.31 kg / 2.89 pounds
1310.0 g / 12.9 N

Table 4: Material efficiency (saturation) - power losses
MW 12x50 / N38

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

Table 5: Thermal stability (material behavior) - 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 pounds
2620.0 g / 25.7 N
OK
40 °C -2.2% 2.56 kg / 5.65 pounds
2562.4 g / 25.1 N
OK
60 °C -4.4% 2.50 kg / 5.52 pounds
2504.7 g / 24.6 N
OK
80 °C -6.6% 2.45 kg / 5.39 pounds
2447.1 g / 24.0 N
100 °C -28.8% 1.87 kg / 4.11 pounds
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) Shear Force (kg/lbs/g/N) Repulsion (kg/lbs) (N-N)
0 mm 26.33 kg / 58.05 pounds
6 179 Gs
3.95 kg / 8.71 pounds
3950 g / 38.7 N
N/A
1 mm 22.19 kg / 48.93 pounds
11 284 Gs
3.33 kg / 7.34 pounds
3329 g / 32.7 N
19.97 kg / 44.04 pounds
~0 Gs
2 mm 18.41 kg / 40.58 pounds
10 277 Gs
2.76 kg / 6.09 pounds
2761 g / 27.1 N
16.57 kg / 36.53 pounds
~0 Gs
3 mm 15.11 kg / 33.30 pounds
9 309 Gs
2.27 kg / 5.00 pounds
2266 g / 22.2 N
13.60 kg / 29.97 pounds
~0 Gs
5 mm 9.94 kg / 21.91 pounds
7 551 Gs
1.49 kg / 3.29 pounds
1491 g / 14.6 N
8.94 kg / 19.72 pounds
~0 Gs
10 mm 3.36 kg / 7.40 pounds
4 389 Gs
0.50 kg / 1.11 pounds
504 g / 4.9 N
3.02 kg / 6.66 pounds
~0 Gs
20 mm 0.51 kg / 1.12 pounds
1 706 Gs
0.08 kg / 0.17 pounds
76 g / 0.7 N
0.46 kg / 1.01 pounds
~0 Gs
50 mm 0.02 kg / 0.04 pounds
303 Gs
0.00 kg / 0.01 pounds
2 g / 0.0 N
0.01 kg / 0.03 pounds
~0 Gs
60 mm 0.01 kg / 0.02 pounds
206 Gs
0.00 kg / 0.00 pounds
1 g / 0.0 N
0.00 kg / 0.00 pounds
~0 Gs
70 mm 0.00 kg / 0.01 pounds
148 Gs
0.00 kg / 0.00 pounds
1 g / 0.0 N
0.00 kg / 0.00 pounds
~0 Gs
80 mm 0.00 kg / 0.00 pounds
110 Gs
0.00 kg / 0.00 pounds
0 g / 0.0 N
0.00 kg / 0.00 pounds
~0 Gs
90 mm 0.00 kg / 0.00 pounds
84 Gs
0.00 kg / 0.00 pounds
0 g / 0.0 N
0.00 kg / 0.00 pounds
~0 Gs
100 mm 0.00 kg / 0.00 pounds
66 Gs
0.00 kg / 0.00 pounds
0 g / 0.0 N
0.00 kg / 0.00 pounds
~0 Gs

Table 7: Safety (HSE) (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
Remote 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: Dynamics (kinetic energy) - collision effects
MW 12x50 / N38

Start from (mm) Speed (km/h) Energy (J) Predicted outcome
10 mm 6.25 km/h
(1.73 m/s)
0.06 J
30 mm 6.33 km/h
(1.76 m/s)
0.07 J
50 mm 6.34 km/h
(1.76 m/s)
0.07 J
100 mm 6.34 km/h
(1.76 m/s)
0.07 J

Table 9: Surface protection spec
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 (Flux)
MW 12x50 / N38

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

Table 11: Submerged application
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%
Rust risk: Standard nickel requires drying after every contact with moisture; lack of maintenance will lead to rust spots.

1. Wall mount (shear)

*Caution: On a vertical surface, the magnet retains just approx. 20-30% of its max power.

2. Plate thickness effect

*Thin metal sheet (e.g. computer case) severely weakens 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) = 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 specification and ecology

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%

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: 010020-2026
Quick Unit Converter

Pulling force


Magnetic Induction

Other offers

The presented product is an incredibly powerful rod magnet, produced from modern NdFeB material, which, with dimensions of Ø12x50 mm, guarantees optimal power. This specific item features high dimensional repeatability and professional build quality, making it an excellent solution for the most demanding engineers and designers. As a cylindrical magnet with significant force (approx. 2.62 kg), this product is available off-the-shelf from our warehouse in Poland, ensuring quick order fulfillment. Furthermore, its Ni-Cu-Ni coating shields it against corrosion in standard operating conditions, ensuring an aesthetic appearance and durability for years.
This model is created for building electric motors, advanced sensors, and efficient magnetic separators, where field concentration on a small surface counts. Thanks to the high power of 25.73 N with a weight of only 42.41 g, this cylindrical magnet is indispensable in miniature devices and wherever low weight is crucial.
Since our magnets have a tolerance of ±0.1mm, the best method is to glue them into holes with a slightly larger diameter (e.g., 12.1 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.
Grade N38 is the most popular standard for professional neodymium magnets, offering an optimal price-to-power ratio and high resistance to demagnetization. If you need even stronger 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 store.
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 secures it 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 12 mm. 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 as well as weaknesses of neodymium magnets.

Pros

Besides their high retention, neodymium magnets are valued for these benefits:
  • They do not lose power, even during around 10 years – the decrease in power is only ~1% (based on measurements),
  • They are noted for resistance to demagnetization induced by presence of other magnetic fields,
  • By covering with a decorative coating of nickel, the element presents an aesthetic look,
  • Neodymium magnets create maximum magnetic induction on a small surface, which allows for strong attraction,
  • Due to their durability and thermal resistance, neodymium magnets are capable of operate (depending on the form) even at high temperatures reaching 230°C or more...
  • Due to the possibility of precise shaping and adaptation to individualized needs, neodymium magnets can be manufactured in a broad palette of forms and dimensions, which increases their versatility,
  • Huge importance in modern technologies – they are commonly used in computer drives, electric drive systems, diagnostic systems, also multitasking production systems.
  • Compactness – despite small sizes they provide effective action, making them ideal for precision applications

Weaknesses

Disadvantages of NdFeB magnets:
  • To avoid cracks upon strong impacts, we recommend using special steel holders. Such a solution protects the magnet and simultaneously increases its durability.
  • We warn that neodymium magnets can reduce their power at high temperatures. To prevent this, we suggest our specialized [AH] magnets, which work effectively even at 230°C.
  • When exposed to humidity, magnets start to rust. For applications outside, it is recommended to use protective magnets, such as magnets in rubber or plastics, which secure oxidation as well as corrosion.
  • We suggest casing - magnetic holder, due to difficulties in producing nuts inside the magnet and complicated forms.
  • Possible danger related to microscopic parts of magnets are risky, when accidentally swallowed, which is particularly important in the context of child health protection. It is also worth noting that small components of these products are able to be problematic in diagnostics medical after entering the body.
  • Higher cost of purchase is one of the disadvantages compared to ceramic magnets, especially in budget applications

Pull force analysis

Best holding force of the magnet in ideal parameterswhat it depends on?

Information about lifting capacity is the result of a measurement for the most favorable conditions, assuming:
  • using a sheet made of high-permeability steel, acting as a magnetic yoke
  • whose transverse dimension is min. 10 mm
  • with an ideally smooth contact surface
  • with total lack of distance (no coatings)
  • under axial force vector (90-degree angle)
  • at room temperature

Lifting capacity in practice – influencing factors

Effective lifting capacity impacted by working environment parameters, mainly (from most important):
  • Air gap (between the magnet and the plate), since even a very small clearance (e.g. 0.5 mm) results in a reduction in lifting capacity by up to 50% (this also applies to varnish, rust or dirt).
  • Loading method – declared lifting capacity refers to detachment vertically. When slipping, the magnet holds much less (often approx. 20-30% of nominal force).
  • Substrate thickness – to utilize 100% power, the steel must be sufficiently thick. Thin sheet restricts the attraction force (the magnet "punches through" it).
  • Chemical composition of the base – low-carbon steel gives the best results. Higher carbon content reduce magnetic permeability and lifting capacity.
  • Surface condition – ground elements ensure maximum contact, which increases field saturation. Rough surfaces reduce efficiency.
  • Heat – neodymium magnets have a negative temperature coefficient. When it is hot they lose power, and in frost gain strength (up to a certain limit).

Lifting capacity was measured by applying a smooth steel plate of suitable thickness (min. 20 mm), under perpendicular pulling force, however under attempts to slide the magnet the holding force is lower. Additionally, even a small distance between the magnet and the plate lowers the lifting capacity.

Safety rules for work with NdFeB magnets
Impact on smartphones

GPS units and smartphones are extremely sensitive to magnetism. Direct contact with a strong magnet can permanently damage the sensors in your phone.

Protect data

Equipment safety: Neodymium magnets can damage data carriers and delicate electronics (heart implants, hearing aids, mechanical watches).

Avoid contact if allergic

Warning for allergy sufferers: The Ni-Cu-Ni coating consists of nickel. If an allergic reaction appears, immediately stop handling magnets and wear gloves.

Respect the power

Handle magnets with awareness. Their immense force can shock even professionals. Be vigilant and do not underestimate their force.

Crushing force

Watch your fingers. Two powerful magnets will snap together instantly with a force of several hundred kilograms, crushing anything in their path. Exercise extreme caution!

Heat warning

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

Protective goggles

Beware of splinters. Magnets can fracture upon violent connection, launching sharp fragments into the air. We recommend safety glasses.

Danger to pacemakers

People with a ICD should maintain an large gap from magnets. The magnetic field can stop the operation of the life-saving device.

Combustion hazard

Fire warning: Rare earth powder is explosive. Do not process magnets in home conditions as this may cause fire.

Danger to the youngest

NdFeB magnets are not suitable for play. Swallowing multiple magnets can lead to them connecting inside the digestive tract, which constitutes a severe health hazard and necessitates immediate surgery.

Warning! More info about risks in the article: Safety of working with magnets.