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MW 12x6 / N38 - cylindrical magnet

cylindrical magnet

Catalog no 010021

GTIN/EAN: 5906301810209

5.00

Diameter Ø

12 mm [±0,1 mm]

Height

6 mm [±0,1 mm]

Weight

5.09 g

Magnetization Direction

↑ axial

Load capacity

4.60 kg / 45.09 N

Magnetic Induction

437.99 mT / 4380 Gs

Coating

[NiCuNi] Nickel

1.882 with VAT / pcs + price for transport

1.530 ZŁ net + 23% VAT / pcs

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Technical details - MW 12x6 / N38 - cylindrical magnet

Specification / characteristics - MW 12x6 / N38 - cylindrical magnet

properties
properties values
Cat. no. 010021
GTIN/EAN 5906301810209
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 6 mm [±0,1 mm]
Weight 5.09 g
Magnetization Direction ↑ axial
Load capacity ~ ? 4.60 kg / 45.09 N
Magnetic Induction ~ ? 437.99 mT / 4380 Gs
Coating [NiCuNi] Nickel
Manufacturing Tolerance ±0.1 mm

Magnetic properties of material N38

Specification / characteristics MW 12x6 / 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

Technical simulation of the magnet - data

These information are the direct effect of a physical calculation. Results are based on models for the class Nd2Fe14B. Real-world conditions may deviate from the simulation results. Please consider these data as a reference point for designers.

Table 1: Static pull force (force vs gap) - interaction chart
MW 12x6 / N38

Distance (mm) Induction (Gauss) / mT Pull Force (kg/lbs/g/N) Risk Status
0 mm 4377 Gs
437.7 mT
4.60 kg / 10.14 pounds
4600.0 g / 45.1 N
warning
1 mm 3688 Gs
368.8 mT
3.27 kg / 7.20 pounds
3265.4 g / 32.0 N
warning
2 mm 2999 Gs
299.9 mT
2.16 kg / 4.76 pounds
2159.7 g / 21.2 N
warning
3 mm 2386 Gs
238.6 mT
1.37 kg / 3.01 pounds
1366.7 g / 13.4 N
low risk
5 mm 1474 Gs
147.4 mT
0.52 kg / 1.15 pounds
521.4 g / 5.1 N
low risk
10 mm 489 Gs
48.9 mT
0.06 kg / 0.13 pounds
57.4 g / 0.6 N
low risk
15 mm 205 Gs
20.5 mT
0.01 kg / 0.02 pounds
10.1 g / 0.1 N
low risk
20 mm 103 Gs
10.3 mT
0.00 kg / 0.01 pounds
2.5 g / 0.0 N
low risk
30 mm 36 Gs
3.6 mT
0.00 kg / 0.00 pounds
0.3 g / 0.0 N
low risk
50 mm 9 Gs
0.9 mT
0.00 kg / 0.00 pounds
0.0 g / 0.0 N
low risk

Table 2: Sliding hold (wall)
MW 12x6 / N38

Distance (mm) Friction coefficient Pull Force (kg/lbs/g/N)
0 mm Stal (~0.2) 0.92 kg / 2.03 pounds
920.0 g / 9.0 N
1 mm Stal (~0.2) 0.65 kg / 1.44 pounds
654.0 g / 6.4 N
2 mm Stal (~0.2) 0.43 kg / 0.95 pounds
432.0 g / 4.2 N
3 mm Stal (~0.2) 0.27 kg / 0.60 pounds
274.0 g / 2.7 N
5 mm Stal (~0.2) 0.10 kg / 0.23 pounds
104.0 g / 1.0 N
10 mm Stal (~0.2) 0.01 kg / 0.03 pounds
12.0 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 (sliding) - vertical pull
MW 12x6 / N38

Surface type Friction coefficient / % Mocy Max load (kg/lbs/g/N)
Raw steel
µ = 0.3 30% Nominalnej Siły
1.38 kg / 3.04 pounds
1380.0 g / 13.5 N
Painted steel (standard)
µ = 0.2 20% Nominalnej Siły
0.92 kg / 2.03 pounds
920.0 g / 9.0 N
Oily/slippery steel
µ = 0.1 10% Nominalnej Siły
0.46 kg / 1.01 pounds
460.0 g / 4.5 N
Magnet with anti-slip rubber
µ = 0.5 50% Nominalnej Siły
2.30 kg / 5.07 pounds
2300.0 g / 22.6 N

Table 4: Steel thickness (substrate influence) - sheet metal selection
MW 12x6 / N38

Steel thickness (mm) % power Real pull force (kg/lbs/g/N)
0.5 mm
10%
0.46 kg / 1.01 pounds
460.0 g / 4.5 N
1 mm
25%
1.15 kg / 2.54 pounds
1150.0 g / 11.3 N
2 mm
50%
2.30 kg / 5.07 pounds
2300.0 g / 22.6 N
3 mm
75%
3.45 kg / 7.61 pounds
3450.0 g / 33.8 N
5 mm
100%
4.60 kg / 10.14 pounds
4600.0 g / 45.1 N
10 mm
100%
4.60 kg / 10.14 pounds
4600.0 g / 45.1 N
11 mm
100%
4.60 kg / 10.14 pounds
4600.0 g / 45.1 N
12 mm
100%
4.60 kg / 10.14 pounds
4600.0 g / 45.1 N

Table 5: Thermal stability (material behavior) - thermal limit
MW 12x6 / N38

Ambient temp. (°C) Power loss Remaining pull (kg/lbs/g/N) Status
20 °C 0.0% 4.60 kg / 10.14 pounds
4600.0 g / 45.1 N
OK
40 °C -2.2% 4.50 kg / 9.92 pounds
4498.8 g / 44.1 N
OK
60 °C -4.4% 4.40 kg / 9.70 pounds
4397.6 g / 43.1 N
80 °C -6.6% 4.30 kg / 9.47 pounds
4296.4 g / 42.1 N
100 °C -28.8% 3.28 kg / 7.22 pounds
3275.2 g / 32.1 N

Table 6: Magnet-Magnet interaction (attraction) - forces in the system
MW 12x6 / N38

Gap (mm) Attraction (kg/lbs) (N-S) Lateral Force (kg/lbs/g/N) Repulsion (kg/lbs) (N-N)
0 mm 13.36 kg / 29.45 pounds
5 536 Gs
2.00 kg / 4.42 pounds
2004 g / 19.7 N
N/A
1 mm 11.39 kg / 25.10 pounds
8 082 Gs
1.71 kg / 3.77 pounds
1708 g / 16.8 N
10.25 kg / 22.59 pounds
~0 Gs
2 mm 9.48 kg / 20.91 pounds
7 376 Gs
1.42 kg / 3.14 pounds
1423 g / 14.0 N
8.54 kg / 18.82 pounds
~0 Gs
3 mm 7.77 kg / 17.12 pounds
6 675 Gs
1.17 kg / 2.57 pounds
1165 g / 11.4 N
6.99 kg / 15.41 pounds
~0 Gs
5 mm 5.01 kg / 11.05 pounds
5 361 Gs
0.75 kg / 1.66 pounds
752 g / 7.4 N
4.51 kg / 9.94 pounds
~0 Gs
10 mm 1.51 kg / 3.34 pounds
2 948 Gs
0.23 kg / 0.50 pounds
227 g / 2.2 N
1.36 kg / 3.01 pounds
~0 Gs
20 mm 0.17 kg / 0.37 pounds
978 Gs
0.02 kg / 0.06 pounds
25 g / 0.2 N
0.15 kg / 0.33 pounds
~0 Gs
50 mm 0.00 kg / 0.01 pounds
116 Gs
0.00 kg / 0.00 pounds
0 g / 0.0 N
0.00 kg / 0.00 pounds
~0 Gs
60 mm 0.00 kg / 0.00 pounds
72 Gs
0.00 kg / 0.00 pounds
0 g / 0.0 N
0.00 kg / 0.00 pounds
~0 Gs
70 mm 0.00 kg / 0.00 pounds
48 Gs
0.00 kg / 0.00 pounds
0 g / 0.0 N
0.00 kg / 0.00 pounds
~0 Gs
80 mm 0.00 kg / 0.00 pounds
33 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
24 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
18 Gs
0.00 kg / 0.00 pounds
0 g / 0.0 N
0.00 kg / 0.00 pounds
~0 Gs

Table 7: Protective zones (electronics) - precautionary measures
MW 12x6 / N38

Object / Device Limit (Gauss) / mT Safe distance
Pacemaker 5 Gs (0.5 mT) 6.5 cm
Hearing aid 10 Gs (1.0 mT) 5.0 cm
Mechanical watch 20 Gs (2.0 mT) 4.0 cm
Mobile device 40 Gs (4.0 mT) 3.0 cm
Remote 50 Gs (5.0 mT) 3.0 cm
Payment card 400 Gs (40.0 mT) 1.5 cm
HDD hard drive 600 Gs (60.0 mT) 1.0 cm

Table 8: Dynamics (cracking risk) - collision effects
MW 12x6 / N38

Start from (mm) Speed (km/h) Energy (J) Predicted outcome
10 mm 30.55 km/h
(8.49 m/s)
0.18 J
30 mm 52.51 km/h
(14.59 m/s)
0.54 J
50 mm 67.79 km/h
(18.83 m/s)
0.90 J
100 mm 95.87 km/h
(26.63 m/s)
1.81 J

Table 9: Anti-corrosion coating durability
MW 12x6 / 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 12x6 / N38

Parameter Value SI Unit / Description
Magnetic Flux 5 024 Mx 50.2 µWb
Pc Coefficient 0.59 Low (Flat)

Table 11: Physics of underwater searching
MW 12x6 / N38

Environment Effective steel pull Effect
Air (land) 4.60 kg Standard
Water (riverbed) 5.27 kg
(+0.67 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. Vertical hold

*Note: On a vertical wall, the magnet retains just a fraction of its nominal pull.

2. Steel thickness impact

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

3. Power loss vs temp

*For N38 grade, the critical limit is 80°C.

4. Demagnetization curve and operating point (B-H)

chart generated for the permeance coefficient Pc (Permeance Coefficient) = 0.59

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
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: 010021-2026
Quick Unit Converter
Magnet pull force

Field Strength

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The offered product is a very strong cylindrical magnet, composed of durable NdFeB material, which, at dimensions of Ø12x6 mm, guarantees maximum efficiency. The MW 12x6 / N38 model boasts high dimensional repeatability and professional build quality, making it an excellent solution for professional engineers and designers. As a magnetic rod with impressive force (approx. 4.60 kg), this product is in stock from our warehouse in Poland, ensuring rapid order fulfillment. Moreover, its Ni-Cu-Ni coating secures it against corrosion in standard operating conditions, ensuring an aesthetic appearance and durability for years.
This model is created for building generators, advanced Hall effect sensors, and efficient filters, where maximum induction on a small surface counts. Thanks to the pull force of 45.09 N with a weight of only 5.09 g, this rod is indispensable in electronics and wherever every gram matters.
Due to the brittleness of the NdFeB material, you must not use force-fitting (so-called press-fit), as this risks immediate cracking of this professional 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.
Grade N38 is the most popular standard for industrial neodymium magnets, offering an optimal price-to-power ratio and high resistance to demagnetization. If you need the strongest magnets in the same volume (Ø12x6), 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 Ø12x6 mm, which, at a weight of 5.09 g, makes it an element with impressive magnetic energy density. The key parameter here is the lifting capacity amounting to approximately 4.60 kg (force ~45.09 N), which, with such compact dimensions, proves the high power of the NdFeB material. The product has a [NiCuNi] coating, which protects the surface against external factors, giving it an aesthetic, silvery shine.
This rod magnet is magnetized axially (along the height of 6 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 Nd2Fe14B magnets.

Strengths

In addition to their pulling strength, neodymium magnets provide the following advantages:
  • They do not lose strength, even over nearly 10 years – the drop in lifting capacity is only ~1% (theoretically),
  • They show high resistance to demagnetization induced by external field influence,
  • The use of an refined layer of noble metals (nickel, gold, silver) causes the element to have aesthetics,
  • Neodymium magnets achieve maximum magnetic induction on a small area, which ensures high operational effectiveness,
  • Thanks to resistance to high temperature, they are capable of working (depending on the form) even at temperatures up to 230°C and higher...
  • In view of the ability of accurate molding and customization to custom projects, NdFeB magnets can be modeled in a variety of geometric configurations, which makes them more universal,
  • Significant place in advanced technology sectors – they are commonly used in data components, electromotive mechanisms, medical equipment, also modern systems.
  • Thanks to concentrated force, small magnets offer high operating force, in miniature format,

Cons

What to avoid - cons of neodymium magnets and ways of using them
  • At very strong impacts they can crack, therefore we recommend placing them in strong housings. A metal housing provides additional protection against damage and increases the magnet's durability.
  • When exposed to high temperature, neodymium magnets suffer a drop in strength. Often, when the temperature exceeds 80°C, their power decreases (depending on the size and shape of the magnet). For those who need magnets for extreme conditions, we offer [AH] versions withstanding up to 230°C
  • Due to the susceptibility of magnets to corrosion in a humid environment, we advise using waterproof magnets made of rubber, plastic or other material resistant to moisture, in case of application outdoors
  • Limited ability of creating nuts in the magnet and complicated shapes - preferred is a housing - mounting mechanism.
  • Possible danger related to microscopic parts of magnets can be dangerous, when accidentally swallowed, which becomes key in the context of child health protection. Furthermore, tiny parts of these products can be problematic in diagnostics medical in case of swallowing.
  • Due to expensive raw materials, their price is higher than average,

Holding force characteristics

Optimal lifting capacity of a neodymium magnetwhat it depends on?

Holding force of 4.60 kg is a result of laboratory testing executed under standard conditions:
  • using a plate made of low-carbon steel, acting as a circuit closing element
  • with a cross-section no less than 10 mm
  • with a plane perfectly flat
  • with direct contact (no paint)
  • during detachment in a direction vertical to the plane
  • in stable room temperature

Practical aspects of lifting capacity – factors

During everyday use, the actual holding force is determined by many variables, listed from the most important:
  • Clearance – existence of foreign body (paint, tape, gap) acts as an insulator, which lowers power rapidly (even by 50% at 0.5 mm).
  • Direction of force – highest force is reached only during pulling at a 90° angle. The resistance to sliding of the magnet along the surface is typically many times lower (approx. 1/5 of the lifting capacity).
  • Substrate thickness – to utilize 100% power, the steel must be sufficiently thick. Paper-thin metal restricts the attraction force (the magnet "punches through" it).
  • Material composition – not every steel reacts the same. High carbon content weaken the interaction with the magnet.
  • Smoothness – full contact is obtained only on polished steel. Any scratches and bumps create air cushions, weakening the magnet.
  • Temperature influence – hot environment weakens magnetic field. Too high temperature can permanently damage the magnet.

Lifting capacity was assessed using a smooth steel plate of optimal thickness (min. 20 mm), under perpendicular pulling force, however under shearing force the lifting capacity is smaller. In addition, even a small distance between the magnet’s surface and the plate decreases the holding force.

H&S for magnets
Fragile material

Beware of splinters. Magnets can explode upon uncontrolled impact, ejecting sharp fragments into the air. Wear goggles.

GPS and phone interference

A powerful magnetic field negatively affects the functioning of compasses in phones and GPS navigation. Keep magnets near a smartphone to avoid damaging the sensors.

Dust is flammable

Dust created during cutting of magnets is flammable. Do not drill into magnets without proper cooling and knowledge.

Demagnetization risk

Regular neodymium magnets (N-type) undergo demagnetization when the temperature exceeds 80°C. Damage is permanent.

Handling rules

Use magnets consciously. Their powerful strength can surprise even professionals. Plan your moves and do not underestimate their power.

Electronic devices

Do not bring magnets close to a wallet, computer, or TV. The magnetic field can irreversibly ruin these devices and erase data from cards.

Bone fractures

Risk of injury: The pulling power is so great that it can cause blood blisters, pinching, and even bone fractures. Use thick gloves.

Warning for allergy sufferers

Nickel alert: The nickel-copper-nickel coating consists of nickel. If redness happens, cease handling magnets and use protective gear.

Do not give to children

Always keep magnets out of reach of children. Choking hazard is high, and the effects of magnets clamping inside the body are tragic.

Life threat

People with a heart stimulator must keep an safe separation from magnets. The magnetic field can disrupt the operation of the implant.

Important! Details about hazards in the article: Magnet Safety Guide.
Dhit sp. z o.o.

e-mail: bok@dhit.pl

tel: +48 888 99 98 98