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MW 12x10 / N38 - cylindrical magnet

cylindrical magnet

Catalog no 010016

GTIN/EAN: 5906301810155

5.00

Diameter Ø

12 mm [±0,1 mm]

Height

10 mm [±0,1 mm]

Weight

8.48 g

Magnetization Direction

↑ axial

Load capacity

4.83 kg / 47.41 N

Magnetic Induction

531.09 mT / 5311 Gs

Coating

[NiCuNi] Nickel

3.03 with VAT / pcs + price for transport

2.46 ZŁ net + 23% VAT / pcs

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Technical of the product - MW 12x10 / N38 - cylindrical magnet

Specification / characteristics - MW 12x10 / N38 - cylindrical magnet

properties
properties values
Cat. no. 010016
GTIN/EAN 5906301810155
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 10 mm [±0,1 mm]
Weight 8.48 g
Magnetization Direction ↑ axial
Load capacity ~ ? 4.83 kg / 47.41 N
Magnetic Induction ~ ? 531.09 mT / 5311 Gs
Coating [NiCuNi] Nickel
Manufacturing Tolerance ±0.1 mm

Magnetic properties of material N38

Specification / characteristics MW 12x10 / 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 analysis of the assembly - technical parameters

The following values represent the outcome of a mathematical simulation. Values were calculated on algorithms for the material Nd2Fe14B. Operational performance might slightly differ from theoretical values. Treat these calculations as a supplementary guide during assembly planning.

Table 1: Static pull force (pull vs gap) - power drop
MW 12x10 / N38

Distance (mm) Induction (Gauss) / mT Pull Force (kg/lbs/g/N) Risk Status
0 mm 5308 Gs
530.8 mT
4.83 kg / 10.65 lbs
4830.0 g / 47.4 N
warning
1 mm 4424 Gs
442.4 mT
3.36 kg / 7.40 lbs
3355.3 g / 32.9 N
warning
2 mm 3585 Gs
358.5 mT
2.20 kg / 4.86 lbs
2203.4 g / 21.6 N
warning
3 mm 2857 Gs
285.7 mT
1.40 kg / 3.08 lbs
1399.2 g / 13.7 N
safe
5 mm 1787 Gs
178.7 mT
0.55 kg / 1.21 lbs
547.8 g / 5.4 N
safe
10 mm 622 Gs
62.2 mT
0.07 kg / 0.15 lbs
66.3 g / 0.7 N
safe
15 mm 272 Gs
27.2 mT
0.01 kg / 0.03 lbs
12.7 g / 0.1 N
safe
20 mm 141 Gs
14.1 mT
0.00 kg / 0.01 lbs
3.4 g / 0.0 N
safe
30 mm 52 Gs
5.2 mT
0.00 kg / 0.00 lbs
0.5 g / 0.0 N
safe
50 mm 13 Gs
1.3 mT
0.00 kg / 0.00 lbs
0.0 g / 0.0 N
safe

Table 2: Shear force (vertical surface)
MW 12x10 / N38

Distance (mm) Friction coefficient Pull Force (kg/lbs/g/N)
0 mm Stal (~0.2) 0.97 kg / 2.13 lbs
966.0 g / 9.5 N
1 mm Stal (~0.2) 0.67 kg / 1.48 lbs
672.0 g / 6.6 N
2 mm Stal (~0.2) 0.44 kg / 0.97 lbs
440.0 g / 4.3 N
3 mm Stal (~0.2) 0.28 kg / 0.62 lbs
280.0 g / 2.7 N
5 mm Stal (~0.2) 0.11 kg / 0.24 lbs
110.0 g / 1.1 N
10 mm Stal (~0.2) 0.01 kg / 0.03 lbs
14.0 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: Vertical assembly (shearing) - behavior on slippery surfaces
MW 12x10 / N38

Surface type Friction coefficient / % Mocy Max load (kg/lbs/g/N)
Raw steel
µ = 0.3 30% Nominalnej Siły
1.45 kg / 3.19 lbs
1449.0 g / 14.2 N
Painted steel (standard)
µ = 0.2 20% Nominalnej Siły
0.97 kg / 2.13 lbs
966.0 g / 9.5 N
Oily/slippery steel
µ = 0.1 10% Nominalnej Siły
0.48 kg / 1.06 lbs
483.0 g / 4.7 N
Magnet with anti-slip rubber
µ = 0.5 50% Nominalnej Siły
2.42 kg / 5.32 lbs
2415.0 g / 23.7 N

Table 4: Steel thickness (substrate influence) - power losses
MW 12x10 / N38

Steel thickness (mm) % power Real pull force (kg/lbs/g/N)
0.5 mm
10%
0.48 kg / 1.06 lbs
483.0 g / 4.7 N
1 mm
25%
1.21 kg / 2.66 lbs
1207.5 g / 11.8 N
2 mm
50%
2.42 kg / 5.32 lbs
2415.0 g / 23.7 N
3 mm
75%
3.62 kg / 7.99 lbs
3622.5 g / 35.5 N
5 mm
100%
4.83 kg / 10.65 lbs
4830.0 g / 47.4 N
10 mm
100%
4.83 kg / 10.65 lbs
4830.0 g / 47.4 N
11 mm
100%
4.83 kg / 10.65 lbs
4830.0 g / 47.4 N
12 mm
100%
4.83 kg / 10.65 lbs
4830.0 g / 47.4 N

Table 5: Working in heat (material behavior) - thermal limit
MW 12x10 / N38

Ambient temp. (°C) Power loss Remaining pull (kg/lbs/g/N) Status
20 °C 0.0% 4.83 kg / 10.65 lbs
4830.0 g / 47.4 N
OK
40 °C -2.2% 4.72 kg / 10.41 lbs
4723.7 g / 46.3 N
OK
60 °C -4.4% 4.62 kg / 10.18 lbs
4617.5 g / 45.3 N
OK
80 °C -6.6% 4.51 kg / 9.95 lbs
4511.2 g / 44.3 N
100 °C -28.8% 3.44 kg / 7.58 lbs
3439.0 g / 33.7 N

Table 6: Two magnets (repulsion) - forces in the system
MW 12x10 / N38

Gap (mm) Attraction (kg/lbs) (N-S) Sliding Force (kg/lbs/g/N) Repulsion (kg/lbs) (N-N)
0 mm 19.64 kg / 43.30 lbs
5 928 Gs
2.95 kg / 6.50 lbs
2946 g / 28.9 N
N/A
1 mm 16.52 kg / 36.43 lbs
9 736 Gs
2.48 kg / 5.46 lbs
2479 g / 24.3 N
14.87 kg / 32.79 lbs
~0 Gs
2 mm 13.64 kg / 30.08 lbs
8 847 Gs
2.05 kg / 4.51 lbs
2047 g / 20.1 N
12.28 kg / 27.07 lbs
~0 Gs
3 mm 11.12 kg / 24.51 lbs
7 986 Gs
1.67 kg / 3.68 lbs
1668 g / 16.4 N
10.01 kg / 22.06 lbs
~0 Gs
5 mm 7.16 kg / 15.79 lbs
6 410 Gs
1.07 kg / 2.37 lbs
1074 g / 10.5 N
6.45 kg / 14.21 lbs
~0 Gs
10 mm 2.23 kg / 4.91 lbs
3 575 Gs
0.33 kg / 0.74 lbs
334 g / 3.3 N
2.00 kg / 4.42 lbs
~0 Gs
20 mm 0.27 kg / 0.59 lbs
1 244 Gs
0.04 kg / 0.09 lbs
40 g / 0.4 N
0.24 kg / 0.54 lbs
~0 Gs
50 mm 0.00 kg / 0.01 lbs
164 Gs
0.00 kg / 0.00 lbs
1 g / 0.0 N
0.00 kg / 0.00 lbs
~0 Gs
60 mm 0.00 kg / 0.00 lbs
104 Gs
0.00 kg / 0.00 lbs
0 g / 0.0 N
0.00 kg / 0.00 lbs
~0 Gs
70 mm 0.00 kg / 0.00 lbs
70 Gs
0.00 kg / 0.00 lbs
0 g / 0.0 N
0.00 kg / 0.00 lbs
~0 Gs
80 mm 0.00 kg / 0.00 lbs
49 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
36 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
27 Gs
0.00 kg / 0.00 lbs
0 g / 0.0 N
0.00 kg / 0.00 lbs
~0 Gs

Table 7: Hazards (implants) - precautionary measures
MW 12x10 / N38

Object / Device Limit (Gauss) / mT Safe distance
Pacemaker 5 Gs (0.5 mT) 7.5 cm
Hearing aid 10 Gs (1.0 mT) 6.0 cm
Mechanical watch 20 Gs (2.0 mT) 4.5 cm
Phone / Smartphone 40 Gs (4.0 mT) 3.5 cm
Car key 50 Gs (5.0 mT) 3.5 cm
Payment card 400 Gs (40.0 mT) 1.5 cm
HDD hard drive 600 Gs (60.0 mT) 1.5 cm

Table 8: Collisions (cracking risk) - collision effects
MW 12x10 / N38

Start from (mm) Speed (km/h) Energy (J) Predicted outcome
10 mm 24.27 km/h
(6.74 m/s)
0.19 J
30 mm 41.69 km/h
(11.58 m/s)
0.57 J
50 mm 53.82 km/h
(14.95 m/s)
0.95 J
100 mm 76.11 km/h
(21.14 m/s)
1.90 J

Table 9: Surface protection spec
MW 12x10 / 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 12x10 / N38

Parameter Value SI Unit / Description
Magnetic Flux 6 105 Mx 61.1 µWb
Pc Coefficient 0.81 High (Stable)

Table 11: Underwater work (magnet fishing)
MW 12x10 / N38

Environment Effective steel pull Effect
Air (land) 4.83 kg Standard
Water (riverbed) 5.53 kg
(+0.70 kg buoyancy gain)
+14.5%
Corrosion warning: This magnet has a standard nickel coating. After use in water, it must be dried and maintained immediately, otherwise it will rust!
1. Wall mount (shear)

*Caution: On a vertical surface, the magnet retains only a fraction of its max power.

2. Efficiency vs thickness

*Thin steel (e.g. computer case) drastically limits the holding force.

3. Thermal stability

*For N38 material, the safety limit is 80°C.

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

chart generated for the permeance coefficient Pc (Permeance Coefficient) = 0.81

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
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: 010016-2026
Magnet Unit Converter
Pulling force

Magnetic Field

Other proposals

This product is a very strong cylinder magnet, composed of advanced NdFeB material, which, at dimensions of Ø12x10 mm, guarantees maximum efficiency. The MW 12x10 / N38 component is characterized by high dimensional repeatability and industrial build quality, making it a perfect solution for professional engineers and designers. As a magnetic rod with significant force (approx. 4.83 kg), this product is available off-the-shelf from our warehouse in Poland, ensuring quick order fulfillment. Additionally, its triple-layer Ni-Cu-Ni coating effectively protects it against corrosion in typical operating conditions, ensuring an aesthetic appearance and durability for years.
It finds application in modeling, advanced automation, and broadly understood industry, serving as a fastening or actuating element. Thanks to the high power of 47.41 N with a weight of only 8.48 g, this rod is indispensable in miniature devices and wherever low weight is crucial.
Due to the delicate structure of the ceramic sinter, you must not use force-fitting (so-called press-fit), as this risks chipping the coating of this precision component. To ensure long-term durability in automation, specialized industrial adhesives are used, which do not react with the nickel coating and fill the gap, guaranteeing durability of the connection.
Magnets 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 even stronger magnets in the same volume (Ø12x10), 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 Ø12x10 mm, which, at a weight of 8.48 g, makes it an element with impressive magnetic energy density. The value of 47.41 N means that the magnet is capable of holding a weight many times exceeding its own mass of 8.48 g. The product has a [NiCuNi] coating, which protects the surface 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. 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.

Strengths and weaknesses of neodymium magnets.

Pros

Apart from their notable magnetism, neodymium magnets have these key benefits:
  • They do not lose strength, even during around ten years – the reduction in lifting capacity is only ~1% (theoretically),
  • Neodymium magnets are characterized by highly resistant to demagnetization caused by external magnetic fields,
  • A magnet with a metallic silver surface has better aesthetics,
  • They are known for high magnetic induction at the operating surface, making them more effective,
  • 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 as well as adjusting to specific requirements,
  • Significant place in future technologies – they serve a role in magnetic memories, electric drive systems, precision medical tools, and other advanced devices.
  • Compactness – despite small sizes they offer powerful magnetic field, making them ideal for precision applications

Cons

Cons of neodymium magnets: tips and applications.
  • To avoid cracks upon strong impacts, we suggest using special steel housings. 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.
  • Magnets exposed to a humid environment can rust. Therefore when using outdoors, we suggest using water-impermeable magnets made of rubber, plastic or other material protecting against moisture
  • Due to limitations in producing nuts and complex shapes in magnets, we recommend using a housing - magnetic mechanism.
  • Health risk to health – tiny shards of magnets can be dangerous, in case of ingestion, which becomes key in the context of child safety. Furthermore, small elements of these devices are able to be problematic in diagnostics medical when they are in the body.
  • With budget limitations the cost of neodymium magnets can be a barrier,

Lifting parameters

Maximum lifting capacity of the magnetwhat affects it?

The declared magnet strength refers to the peak performance, measured under optimal environment, namely:
  • on a block made of mild steel, perfectly concentrating the magnetic flux
  • possessing a thickness of minimum 10 mm to ensure full flux closure
  • characterized by even structure
  • with zero gap (no coatings)
  • during detachment in a direction perpendicular to the mounting surface
  • at temperature room level

Impact of factors on magnetic holding capacity in practice

Real force is influenced by specific conditions, such as (from priority):
  • Air gap (between the magnet and the metal), since even a very small clearance (e.g. 0.5 mm) results in a drastic drop in force by up to 50% (this also applies to paint, corrosion or dirt).
  • Force direction – declared lifting capacity refers to detachment vertically. When slipping, the magnet holds much less (often approx. 20-30% of maximum force).
  • Element thickness – to utilize 100% power, the steel must be sufficiently thick. Paper-thin metal restricts the attraction force (the magnet "punches through" it).
  • Steel grade – the best choice is pure iron steel. Cast iron may generate lower lifting capacity.
  • Surface finish – full contact is obtained only on polished steel. Any scratches and bumps create air cushions, weakening the magnet.
  • Temperature influence – hot environment reduces magnetic field. Exceeding the limit temperature can permanently demagnetize the magnet.

Lifting capacity was measured using a polished steel plate of suitable thickness (min. 20 mm), under perpendicular detachment force, however under shearing force the load capacity is reduced by as much as fivefold. Moreover, even a minimal clearance between the magnet’s surface and the plate reduces the load capacity.

Precautions when working with NdFeB magnets
Fire risk

Powder generated during machining of magnets is flammable. Do not drill into magnets unless you are an expert.

Powerful field

Before use, read the rules. Uncontrolled attraction can destroy the magnet or hurt your hand. Be predictive.

Precision electronics

An intense magnetic field interferes with the functioning of compasses in phones and navigation systems. Maintain magnets near a device to avoid damaging the sensors.

Heat sensitivity

Monitor thermal conditions. Exposing the magnet to high heat will destroy its properties and strength.

Pacemakers

Life threat: Neodymium magnets can deactivate pacemakers and defibrillators. Do not approach if you have electronic implants.

Risk of cracking

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

No play value

Neodymium magnets are not suitable for play. Eating a few magnets can lead to them pinching intestinal walls, which poses a critical condition and requires immediate surgery.

Crushing risk

Big blocks can break fingers instantly. Never place your hand betwixt two strong magnets.

Protect data

Data protection: Strong magnets can damage data carriers and sensitive devices (pacemakers, hearing aids, timepieces).

Metal Allergy

Allergy Notice: The nickel-copper-nickel coating consists of nickel. If redness appears, immediately stop handling magnets and wear gloves.

Warning! More info about hazards in the article: Magnet Safety Guide.
Dhit sp. z o.o.

e-mail: bok@dhit.pl

tel: +48 888 99 98 98