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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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Physical properties - 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 modeling of the magnet - data

Presented information constitute the result of a engineering simulation. Values were calculated on models for the material Nd2Fe14B. Real-world performance may differ from theoretical values. Treat these calculations as a preliminary roadmap when designing systems.

Table 1: Static force (force vs distance) - 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 lbs
2620.0 g / 25.7 N
strong
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: Vertical force (vertical surface)
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 (sliding) - 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 stability (material behavior) - power drop
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: Two magnets (attraction) - field range
MW 12x50 / N38

Gap (mm) Attraction (kg/lbs) (N-S) Shear Strength (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 (electronics) - warnings
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 (cracking risk) - 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: 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: Hydrostatics and buoyancy
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: This magnet has a standard nickel coating. After use in water, it must be dried and maintained immediately, otherwise it will rust!
1. Vertical hold

*Note: On a vertical surface, the magnet holds merely a fraction of its max power.

2. Efficiency vs thickness

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

3. Thermal stability

*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) = 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
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%
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
Magnet Unit Converter
Pulling force

Magnetic Induction

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The offered product is an incredibly powerful cylindrical magnet, composed of durable NdFeB material, which, at dimensions of Ø12x50 mm, guarantees optimal power. This specific item features an accuracy of ±0.1mm and industrial build quality, making it an excellent 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 lightning-fast order fulfillment. Furthermore, its triple-layer Ni-Cu-Ni coating effectively protects it against corrosion in typical operating conditions, guaranteeing an aesthetic appearance and durability for years.
It finds application in DIY projects, advanced automation, 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 delicate structure of the ceramic sinter, you must not use force-fitting (so-called press-fit), as this risks immediate cracking of this professional component. To ensure long-term durability in industry, anaerobic resins are used, which do not react with the nickel coating and fill the gap, guaranteeing durability of the connection.
Magnets NdFeB grade N38 are strong enough for 90% of applications in modeling and machine building, where extreme miniaturization with maximum force is not required. 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 available off-the-shelf in our warehouse.
This model is characterized by dimensions Ø12x50 mm, which, at a weight of 42.41 g, makes it an element with impressive 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. 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.

Advantages and disadvantages of Nd2Fe14B magnets.

Strengths

Besides their high retention, neodymium magnets are valued for these benefits:
  • Their power remains stable, and after around 10 years it decreases only by ~1% (theoretically),
  • Neodymium magnets are characterized by extremely resistant to magnetic field loss caused by external field sources,
  • In other words, due to the aesthetic layer of gold, the element gains visual value,
  • Magnetic induction on the working part of the magnet is very high,
  • 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 machining and adjusting to precise conditions,
  • Wide application in modern industrial fields – they are used in computer drives, electromotive mechanisms, diagnostic systems, as well as other advanced devices.
  • Compactness – despite small sizes they offer powerful magnetic field, making them ideal for precision applications

Weaknesses

Problematic aspects of neodymium magnets: tips and applications.
  • At very strong impacts they can crack, therefore we advise placing them in steel cases. A metal housing provides additional protection against damage and 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 rust in a humid environment - during use outdoors we advise using waterproof magnets e.g. in rubber, plastic
  • Due to limitations in realizing threads and complicated shapes in magnets, we recommend using a housing - magnetic holder.
  • Potential hazard resulting from small fragments of magnets can be dangerous, when accidentally swallowed, which is particularly important in the context of child safety. Furthermore, tiny parts of these products are able to be problematic in diagnostics medical in case of swallowing.
  • Due to neodymium price, their price is higher than average,

Holding force characteristics

Best holding force of the magnet in ideal parameterswhat contributes to it?

Holding force of 2.62 kg is a theoretical maximum value conducted under specific, ideal conditions:
  • using a sheet made of mild steel, acting as a magnetic yoke
  • possessing a thickness of min. 10 mm to avoid saturation
  • with an ground contact surface
  • without any air gap between the magnet and steel
  • for force applied at a right angle (pull-off, not shear)
  • at ambient temperature room level

Impact of factors on magnetic holding capacity in practice

During everyday use, the actual holding force is determined by many variables, listed from the most important:
  • Gap between surfaces – every millimeter of separation (caused e.g. by varnish or dirt) significantly weakens the magnet efficiency, often by half at just 0.5 mm.
  • Pull-off angle – remember that the magnet holds strongest perpendicularly. Under sliding down, the capacity drops significantly, often to levels of 20-30% of the nominal value.
  • Wall thickness – thin material does not allow full use of the magnet. Part of the magnetic field passes through the material instead of converting into lifting capacity.
  • Metal type – different alloys reacts the same. High carbon content weaken the interaction with the magnet.
  • Surface condition – ground elements guarantee perfect abutment, which increases force. Rough surfaces reduce efficiency.
  • Thermal conditions – neodymium magnets have a negative temperature coefficient. When it is hot they lose power, and at low temperatures they can be stronger (up to a certain limit).

Lifting capacity testing was carried out on plates with a smooth surface of optimal thickness, under a perpendicular pulling force, in contrast under parallel forces the load capacity is reduced by as much as 5 times. In addition, even a slight gap between the magnet’s surface and the plate lowers the holding force.

Safe handling of NdFeB magnets
Flammability

Powder created during machining of magnets is combustible. Do not drill into magnets without proper cooling and knowledge.

Data carriers

Very strong magnetic fields can destroy records on payment cards, hard drives, and storage devices. Stay away of at least 10 cm.

Caution required

Before use, check safety instructions. Sudden snapping can break the magnet or injure your hand. Be predictive.

Danger to the youngest

Neodymium magnets are not suitable for play. Swallowing a few magnets can lead to them connecting inside the digestive tract, which poses a direct threat to life and requires urgent medical intervention.

Pinching danger

Big blocks can crush fingers in a fraction of a second. Do not place your hand between two strong magnets.

Compass and GPS

GPS units and mobile phones are highly sensitive to magnetism. Direct contact with a powerful NdFeB magnet can permanently damage the internal compass in your phone.

Heat sensitivity

Monitor thermal conditions. Heating the magnet to high heat will permanently weaken its magnetic structure and strength.

Beware of splinters

Protect your eyes. Magnets can fracture upon violent connection, launching shards into the air. We recommend safety glasses.

Health Danger

People with a heart stimulator have to keep an safe separation from magnets. The magnetism can interfere with the operation of the life-saving device.

Allergic reactions

Warning for allergy sufferers: The nickel-copper-nickel coating contains nickel. If skin irritation appears, cease working with magnets and use protective gear.

Warning! Need more info? Check our post: Are neodymium magnets dangerous?