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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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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 modeling of the magnet - technical parameters

Presented data are the direct effect of a physical simulation. Values are based on algorithms for the material Nd2Fe14B. Real-world parameters may differ. Please consider these calculations as a preliminary roadmap during assembly planning.

Table 1: Static force (force vs distance) - characteristics
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: Shear load (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 (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: Steel thickness (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: Two magnets (repulsion) - field range
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 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: Hazards (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: Dynamics (kinetic energy) - warning
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: Construction 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%
Warning: Standard nickel requires drying after every contact with moisture; lack of maintenance will lead to rust spots.
1. Vertical hold

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

2. Steel saturation

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

3. Power loss vs temp

*For standard magnets, 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

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 and environmental data
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%
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
Quick Unit Converter
Force (pull)

Magnetic Induction

Other proposals

The offered product is an incredibly powerful cylinder magnet, produced from modern NdFeB material, which, with dimensions of Ø12x50 mm, guarantees maximum efficiency. This specific item is characterized by an accuracy of ±0.1mm and industrial build quality, making it an ideal 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 warehouse in Poland, ensuring quick order fulfillment. Furthermore, its Ni-Cu-Ni coating effectively protects it against corrosion in typical operating conditions, guaranteeing an aesthetic appearance and durability for years.
This model is ideal for building electric motors, advanced sensors, and efficient filters, where maximum induction on a small surface counts. Thanks to the high power of 25.73 N with a weight of only 42.41 g, this rod is indispensable in miniature devices 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, specialized industrial adhesives are used, which do not react with the nickel coating and fill the gap, guaranteeing high repeatability of the connection.
Magnets NdFeB grade N38 are suitable for the majority of applications in automation 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 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 oxidation, giving it an aesthetic, silvery shine.
This rod magnet is magnetized axially (along the height of 50 mm), which means that the N and S poles are located on the flat, circular surfaces. 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.

Advantages and disadvantages of neodymium magnets.

Pros

Besides their durability, neodymium magnets are valued for these benefits:
  • They retain magnetic properties for nearly 10 years – the loss is just ~1% (according to analyses),
  • They have excellent resistance to magnetism drop when exposed to external magnetic sources,
  • The use of an shiny finish of noble metals (nickel, gold, silver) causes the element to present itself better,
  • They feature high magnetic induction at the operating surface, which improves attraction properties,
  • Through (adequate) combination of ingredients, they can achieve high thermal strength, allowing for action at temperatures reaching 230°C and above...
  • Possibility of detailed shaping as well as adapting to specific conditions,
  • Huge importance in high-tech industry – they serve a role in magnetic memories, brushless drives, advanced medical instruments, also multitasking production systems.
  • Relatively small size with high pulling force – neodymium magnets offer strong magnetic field in tiny dimensions, which allows their use in miniature devices

Weaknesses

Disadvantages of neodymium magnets:
  • They are prone to damage upon too strong 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
  • Neodymium magnets lose their power 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
  • When exposed to humidity, magnets usually 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.
  • Limited ability of creating threads in the magnet and complex forms - preferred is casing - magnetic holder.
  • Potential hazard to health – tiny shards of magnets can be dangerous, when accidentally swallowed, which gains importance in the context of child safety. Additionally, small elements of these magnets can complicate diagnosis medical when they are in the body.
  • Higher cost of purchase is one of the disadvantages compared to ceramic magnets, especially in budget applications

Pull force analysis

Detachment force of the magnet in optimal conditionswhat contributes to it?

The force parameter is a measurement result performed under standard conditions:
  • using a sheet made of high-permeability steel, serving as a circuit closing element
  • with a cross-section of at least 10 mm
  • with an ground touching surface
  • under conditions of no distance (surface-to-surface)
  • under vertical force vector (90-degree angle)
  • at ambient temperature approx. 20 degrees Celsius

Practical aspects of lifting capacity – factors

It is worth knowing that the working load may be lower influenced by elements below, in order of importance:
  • Clearance – existence of any layer (paint, tape, air) interrupts the magnetic circuit, which lowers capacity rapidly (even by 50% at 0.5 mm).
  • Loading method – declared lifting capacity refers to detachment vertically. When attempting to slide, the magnet exhibits significantly lower power (often approx. 20-30% of maximum force).
  • Base massiveness – too thin sheet does not close the flux, causing part of the flux to be escaped into the air.
  • Material composition – different alloys attracts identically. Alloy additives weaken the interaction with the magnet.
  • Plate texture – smooth surfaces ensure maximum contact, which improves force. Rough surfaces reduce efficiency.
  • Temperature – heating the magnet results in weakening of induction. Check the thermal limit for a given model.

Holding force was measured on a smooth steel plate of 20 mm thickness, when the force acted perpendicularly, however under attempts to slide the magnet the load capacity is reduced by as much as 75%. Additionally, even a small distance between the magnet’s surface and the plate lowers the lifting capacity.

Precautions when working with NdFeB magnets
Beware of splinters

Despite the nickel coating, neodymium is brittle and cannot withstand shocks. Do not hit, as the magnet may crumble into hazardous fragments.

Nickel coating and allergies

Some people experience a hypersensitivity to Ni, which is the typical protective layer for NdFeB magnets. Extended handling might lead to a rash. We recommend wear protective gloves.

Bodily injuries

Mind your fingers. Two powerful magnets will join immediately with a force of massive weight, crushing anything in their path. Be careful!

Thermal limits

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

Fire warning

Combustion risk: Neodymium dust is explosive. Do not process magnets without safety gear as this risks ignition.

Handling rules

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

Electronic hazard

Avoid bringing magnets close to a purse, computer, or TV. The magnetism can irreversibly ruin these devices and erase data from cards.

Impact on smartphones

Navigation devices and mobile phones are extremely sensitive to magnetic fields. Close proximity with a powerful NdFeB magnet can decalibrate the sensors in your phone.

Product not for children

Strictly store magnets away from children. Risk of swallowing is significant, and the effects of magnets clamping inside the body are very dangerous.

Warning for heart patients

For implant holders: Strong magnetic fields disrupt electronics. Keep at least 30 cm distance or request help to handle the magnets.

Danger! Learn more about risks in the article: Magnet Safety Guide.
Dhit sp. z o.o.

e-mail: bok@dhit.pl

tel: +48 888 99 98 98