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MW 12x1 / N38 - cylindrical magnet

cylindrical magnet

Catalog no 010015

GTIN/EAN: 5906301810148

5.00

Diameter Ø

12 mm [±0,1 mm]

Height

1 mm [±0,1 mm]

Weight

0.85 g

Magnetization Direction

↑ axial

Load capacity

0.42 kg / 4.15 N

Magnetic Induction

101.90 mT / 1019 Gs

Coating

[NiCuNi] Nickel

view technical specifications »

0.578 ZŁ with VAT / pcs + price for transport

0.470 ZŁ net + 23% VAT / pcs

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Technical data of the product - MW 12x1 / N38 - cylindrical magnet

Specification / characteristics - MW 12x1 / N38 - cylindrical magnet

properties
properties values
Cat. no. 010015
GTIN/EAN 5906301810148
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 1 mm [±0,1 mm]
Weight 0.85 g
Magnetization Direction ↑ axial
Load capacity ~ ? 0.42 kg / 4.15 N
Magnetic Induction ~ ? 101.90 mT / 1019 Gs
Coating [NiCuNi] Nickel
Manufacturing Tolerance ±0.1 mm

Magnetic properties of material N38

Specification / characteristics MW 12x1 / 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 analysis of the assembly - technical parameters

These information constitute the outcome of a mathematical simulation. Values were calculated on models for the class Nd2Fe14B. Real-world performance might slightly differ from theoretical values. Treat these data as a supplementary guide when designing systems.

Table 1: Static force (pull vs distance) - power drop
MW 12x1 / N38

Distance (mm) Induction (Gauss) / mT Pull Force (kg/lbs/g/N) Risk Status
0 mm 1019 Gs
101.9 mT
 0.42 kg / 0.93 lbs
420.0 g / 4.1 N
 safe
1 mm 941 Gs
94.1 mT
 0.36 kg / 0.79 lbs
358.5 g / 3.5 N
 safe
2 mm 812 Gs
81.2 mT
 0.27 kg / 0.59 lbs
266.8 g / 2.6 N
 safe
3 mm 666 Gs
66.6 mT
 0.18 kg / 0.40 lbs
179.7 g / 1.8 N
 safe
5 mm 415 Gs
41.5 mT
 0.07 kg / 0.15 lbs
69.7 g / 0.7 N
 safe
10 mm 126 Gs
12.6 mT
 0.01 kg / 0.01 lbs
6.5 g / 0.1 N
 safe
15 mm 49 Gs
4.9 mT
 0.00 kg / 0.00 lbs
1.0 g / 0.0 N
 safe
20 mm 23 Gs
2.3 mT
 0.00 kg / 0.00 lbs
0.2 g / 0.0 N
 safe
30 mm 7 Gs
0.7 mT
 0.00 kg / 0.00 lbs
0.0 g / 0.0 N
 safe
50 mm 2 Gs
0.2 mT
 0.00 kg / 0.00 lbs
0.0 g / 0.0 N
 safe
Grip strength drops drastically with every subsequent millimeter of spacing. Remember that even the smallest gap (e.g., dirt, varnish, rust) strongly weakens the grip. Magnetic products hold optimally at the point of direct contact; air break drastically cuts the force. Observe how rapidly the pull force drop, when the product does not touch flatly to the steel surface. When calculating the assembly, eliminate unnecessary gaps.

Table 2: Shear load (wall)
MW 12x1 / N38

Distance (mm) Friction coefficient Pull Force (kg/lbs/g/N)
0 mm Stal (~0.2) 0.08 kg / 0.19 lbs
84.0 g / 0.8 N
1 mm Stal (~0.2) 0.07 kg / 0.16 lbs
72.0 g / 0.7 N
2 mm Stal (~0.2) 0.05 kg / 0.12 lbs
54.0 g / 0.5 N
3 mm Stal (~0.2) 0.04 kg / 0.08 lbs
36.0 g / 0.4 N
5 mm Stal (~0.2) 0.01 kg / 0.03 lbs
14.0 g / 0.1 N
10 mm Stal (~0.2) 0.00 kg / 0.00 lbs
2.0 g / 0.0 N
15 mm Stal (~0.2) 0.00 kg / 0.00 lbs
0.0 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
The following data indicates the theoretical holding capacity required to start the sliding of the magnet downwards along a upright steel plate (assuming standard friction). The holding force is relative to the air gap between the magnet and the surface.

Table 3: Vertical assembly (sliding) - behavior on slippery surfaces
MW 12x1 / N38

Surface type Friction coefficient / % Mocy Max load (kg/lbs/g/N)
Raw steel
µ = 0.3 30% Nominalnej Siły
0.13 kg / 0.28 lbs
126.0 g / 1.2 N
Painted steel (standard)
µ = 0.2 20% Nominalnej Siły
0.08 kg / 0.19 lbs
84.0 g / 0.8 N
Oily/slippery steel
µ = 0.1 10% Nominalnej Siły
0.04 kg / 0.09 lbs
42.0 g / 0.4 N
Magnet with anti-slip rubber
µ = 0.5 50% Nominalnej Siły
0.21 kg / 0.46 lbs
210.0 g / 2.1 N
When mounting a holder on a vertical wall (e.g., a car body), it will only hold barely about 20%-30% of its nominal power. Gravity as well as a weak degree of grip mean that holders slide down easier than they pop off the substrate. Planning a wall mount? Consider that the shear force is significantly lower than the perpendicular breakaway force. On a slippery surface, the magnet will slide down under a significantly smaller weight. Application of an anti-slip pad can effectively improve the result.

Table 4: Material efficiency (saturation) - sheet metal selection
MW 12x1 / N38

Steel thickness (mm) % power Real pull force (kg/lbs/g/N)
0.5 mm
10%
 0.04 kg / 0.09 lbs
42.0 g / 0.4 N
1 mm
25%
 0.11 kg / 0.23 lbs
105.0 g / 1.0 N
2 mm
50%
 0.21 kg / 0.46 lbs
210.0 g / 2.1 N
3 mm
75%
 0.32 kg / 0.69 lbs
315.0 g / 3.1 N
5 mm
100%
 0.42 kg / 0.93 lbs
420.0 g / 4.1 N
10 mm
100%
 0.42 kg / 0.93 lbs
420.0 g / 4.1 N
11 mm
100%
 0.42 kg / 0.93 lbs
420.0 g / 4.1 N
12 mm
100%
 0.42 kg / 0.93 lbs
420.0 g / 4.1 N
A too thin steel cannot conduct the entire magnetic field, which squanders power of the holder. If you mount a strong magnet to a thin surface, the magnetism will pass right through and the attraction force will be weaker. To squeeze the maximum of this neodymium's potential, you require a sufficiently solid element of metal. The saturation effect means that on sheet metal structures (e.g., thin profiles), the product shows lower pull force. We suggest choosing the steel dimension from these parameters.

Table 5: Thermal resistance (stability) - resistance threshold
MW 12x1 / N38

Ambient temp. (°C) Power loss Remaining pull (kg/lbs/g/N) Status
20 °C 0.0% 0.42 kg / 0.93 lbs
420.0 g / 4.1 N
 OK
40 °C -2.2% 0.41 kg / 0.91 lbs
410.8 g / 4.0 N
 OK
60 °C -4.4% 0.40 kg / 0.89 lbs
401.5 g / 3.9 N
80 °C -6.6% 0.39 kg / 0.86 lbs
392.3 g / 3.8 N
100 °C -28.8% 0.30 kg / 0.66 lbs
299.0 g / 2.9 N
Ordinary NdFeB products change their properties power past the thermal threshold. Protect against heat – high temperature can permanently demagnetize this magnet. With every degree above norm, the magnet's power momentarily lowers. Do not use this product in hot environments exceeding its operating temperature limit. Too high temperature will cause irreversible degradation of magnetism.
*Technical advisory: Temperature resistance depends not only on the material grade, as well as the dimension ratios. Low-profile magnets (low Pc) risk losing magnetic properties under lower heat stress than long magnets. Warning indicator in the table indicates permanent field degradation for this specific geometry.

Table 6: Two magnets (repulsion) - field collision
MW 12x1 / N38

Gap (mm) Attraction (kg/lbs) (N-S) Lateral Force (kg/lbs/g/N) Repulsion (kg/lbs) (N-N)
0 mm 0.72 kg / 1.60 lbs
1 959 Gs
0.11 kg / 0.24 lbs
109 g / 1.1 N
 N/A
1 mm 0.68 kg / 1.50 lbs
1 978 Gs
0.10 kg / 0.23 lbs
102 g / 1.0 N
 0.61 kg / 1.35 lbs
~0 Gs
2 mm 0.62 kg / 1.36 lbs
1 883 Gs
0.09 kg / 0.20 lbs
93 g / 0.9 N
 0.56 kg / 1.23 lbs
~0 Gs
3 mm 0.54 kg / 1.19 lbs
1 762 Gs
0.08 kg / 0.18 lbs
81 g / 0.8 N
 0.49 kg / 1.07 lbs
~0 Gs
5 mm 0.38 kg / 0.84 lbs
1 479 Gs
0.06 kg / 0.13 lbs
57 g / 0.6 N
 0.34 kg / 0.76 lbs
~0 Gs
10 mm 0.12 kg / 0.26 lbs
830 Gs
0.02 kg / 0.04 lbs
18 g / 0.2 N
 0.11 kg / 0.24 lbs
~0 Gs
20 mm 0.01 kg / 0.02 lbs
253 Gs
0.00 kg / 0.00 lbs
2 g / 0.0 N
 0.01 kg / 0.02 lbs
~0 Gs
50 mm 0.00 kg / 0.00 lbs
25 Gs
0.00 kg / 0.00 lbs
0 g / 0.0 N
 0.00 kg / 0.00 lbs
~0 Gs
60 mm 0.00 kg / 0.00 lbs
15 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
10 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
7 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
5 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
3 Gs
0.00 kg / 0.00 lbs
0 g / 0.0 N
 0.00 kg / 0.00 lbs
~0 Gs
Two magnets interact from a significantly greater distance than a neodymium and metal combination. The connection of magnet-to-magnet creates a more powerful interaction and a further horizon of performance. Want to build a strong closure? Utilize two neodymiums instead of a neodymium and a steel. Remember that when bringing together two magnets, the collision energy is huge. The levitation is marginally weaker than the connection force, but still significant.
*Flux density for N-N configuration reaches ~0 Gs in the exact middle between the magnets (due to field cancellation).
* Calculations demonstrate friction force of a pair of identical magnets (friction ~0.15 for Ni-Ni coating).

Table 7: Safety (HSE) (electronics) - warnings
MW 12x1 / N38

Object / Device Limit (Gauss) / mT Safe distance
Pacemaker 5 Gs (0.5 mT) 3.5 cm
Hearing aid 10 Gs (1.0 mT) 3.0 cm
Mechanical watch 20 Gs (2.0 mT) 2.5 cm
Phone / Smartphone 40 Gs (4.0 mT) 2.0 cm
Car key 50 Gs (5.0 mT) 1.5 cm
Payment card 400 Gs (40.0 mT) 1.0 cm
HDD hard drive 600 Gs (60.0 mT) 0.5 cm
Extremely neodym field is a real danger to IT equipment as well as medical implants. These magnets generate a flux that destroys function of sensitive medical devices. Be aware: the invisible magnetic field passes through tissues and housings. Increased vigilance must be exercised by people with hearing aids and insulin pumps. The risk also applies to: mechanical watches, car keys, membranes, and displays. Do not bring the product near payment cards, HDD media, or precise measuring instruments.

Table 8: Collisions (cracking risk) - collision effects
MW 12x1 / N38

Start from (mm) Speed (km/h) Energy (J) Predicted outcome
10 mm 22.63 km/h
(6.29 m/s)
 0.02 J
30 mm 38.83 km/h
(10.79 m/s)
 0.05 J
50 mm 50.13 km/h
(13.92 m/s)
 0.08 J
100 mm 70.89 km/h
(19.69 m/s)
 0.16 J
Neodymium magnets are delicate – a strong collision with metal causes immediate chipping. Watch the impact speed – a magnet released freely speeds with massive force. Striking energy can destroy the magnet or painful pinches to skin. Be sure to control the product during bringing near metal so it doesn't hit with great force against the steel surface. A contact at a velocity of dozens of km/h almost guarantees destruction of the magnet. Wear eye protection when handling with powerful specimens.

Table 9: Anti-corrosion coating durability
MW 12x1 / 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)
For outdoor applications, an epoxy coating is required; standard nickel is intended for indoor use. Improper coating selection is the most common cause of magnet failure over time.

Table 10: Construction data (Flux)
MW 12x1 / N38

Parameter Value SI Unit / Description
Magnetic Flux 1 564 Mx 15.6 µWb
Pc Coefficient 0.13 Low (Flat)
Total magnetic flux passing through the pole surface. Key data when building generators as well as sensors. Pc value determines the working geometry.

Table 11: Physics of underwater searching
MW 12x1 / N38

Environment Effective steel pull Effect
Air (land) 0.42 kg Standard
Water (riverbed) 0.48 kg
(+0.06 kg buoyancy gain)
+14.5%
Warning: Standard nickel requires drying after every contact with moisture; lack of maintenance will lead to rust spots.
Water displaces steel, making heavy objects slightly lighter. Buoyancy helps in lifting finds.
1. Shear force

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

2. Steel thickness impact

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

3. Temperature resistance

*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) = 0.13

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.

Engineering data and GPSR
Material specification
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: 010015-2026
Magnet Unit Converter
Force (pull)
Field Strength
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The offered product is an incredibly powerful cylinder magnet, composed of modern NdFeB material, which, at dimensions of Ø12x1 mm, guarantees the highest energy density. The MW 12x1 / N38 model features a tolerance of ±0.1mm and professional build quality, making it an ideal solution for the most demanding engineers and designers. As a magnetic rod with impressive force (approx. 0.42 kg), this product is available off-the-shelf from our warehouse in Poland, ensuring rapid order fulfillment. Moreover, its triple-layer Ni-Cu-Ni coating shields it against corrosion in standard operating conditions, guaranteeing 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 high power of 4.15 N with a weight of only 0.85 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 chipping the coating of this professional component. To ensure long-term durability in industry, specialized industrial adhesives are used, which are safe for nickel and fill the gap, guaranteeing durability of the connection.
Magnets N38 are suitable for the majority 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 (Ø12x1), contact us regarding higher grades (e.g., N50, N52), however, N38 is the standard available off-the-shelf in our warehouse.
The presented product is a neodymium magnet with precisely defined parameters: diameter 12 mm and height 1 mm. The value of 4.15 N means that the magnet is capable of holding a weight many times exceeding its own mass of 0.85 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 1 mm), which means that the N and S poles are located on the flat, circular surfaces. Such an arrangement is standard 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 diametrically if your project requires it.

Advantages and disadvantages of neodymium magnets.

Strengths

Besides their stability, neodymium magnets are valued for these benefits:
  • They have stable power, and over around ten years their performance decreases symbolically – ~1% (in testing),
  • They have excellent resistance to magnetic field loss due to opposing magnetic fields,
  • The use of an elegant finish of noble metals (nickel, gold, silver) causes the element to present itself better,
  • The surface of neodymium magnets generates a strong magnetic field – this is one of their assets,
  • Thanks to resistance to high temperature, they are able to function (depending on the form) even at temperatures up to 230°C and higher...
  • Thanks to freedom in shaping and the capacity to adapt to specific needs,
  • Versatile presence in advanced technology sectors – they are commonly used in computer drives, electric drive systems, medical devices, and other advanced devices.
  • Compactness – despite small sizes they provide effective action, making them ideal for precision applications

Cons

Problematic aspects of neodymium magnets and ways of using them
  • To avoid cracks upon strong impacts, we suggest using special steel housings. Such a solution protects the magnet and simultaneously increases its durability.
  • When exposed to high temperature, neodymium magnets experience a drop in strength. Often, when the temperature exceeds 80°C, their strength 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
  • They oxidize in a humid environment - during use outdoors we suggest using waterproof magnets e.g. in rubber, plastic
  • Due to limitations in realizing threads and complex shapes in magnets, we recommend using casing - magnetic holder.
  • Potential hazard resulting from small fragments of magnets can be dangerous, in case of ingestion, which becomes key in the context of child safety. It is also worth noting that small components of these magnets are able to disrupt the diagnostic process medical in case of swallowing.
  • With large orders the cost of neodymium magnets can be a barrier,

Lifting parameters

Maximum lifting force for a neodymium magnet – what it depends on?

Breakaway force was defined for optimal configuration, including:
  • on a base made of structural steel, perfectly concentrating the magnetic field
  • possessing a massiveness of minimum 10 mm to ensure full flux closure
  • with an polished contact surface
  • with zero gap (no coatings)
  • during pulling in a direction vertical to the plane
  • at ambient temperature room level

Impact of factors on magnetic holding capacity in practice

During everyday use, the actual lifting capacity is determined by a number of factors, ranked from crucial:
  • Distance (between the magnet and the plate), as even a microscopic clearance (e.g. 0.5 mm) results in a decrease in force by up to 50% (this also applies to varnish, corrosion or debris).
  • Force direction – catalog parameter refers to pulling vertically. When applying parallel force, the magnet holds significantly lower power (typically approx. 20-30% of nominal force).
  • Steel thickness – too thin steel does not accept the full field, causing part of the flux to be wasted into the air.
  • Steel grade – the best choice is pure iron steel. Cast iron may generate lower lifting capacity.
  • Surface finish – full contact is possible only on smooth steel. Rough texture reduce the real contact area, reducing force.
  • Thermal factor – high temperature weakens pulling force. Too high temperature can permanently demagnetize the magnet.

Lifting capacity testing was conducted on a smooth plate of optimal thickness, under perpendicular forces, whereas under parallel forces the lifting capacity is smaller. Moreover, even a slight gap between the magnet and the plate decreases the load capacity.

Warnings
Beware of splinters

Despite metallic appearance, the material is delicate and not impact-resistant. Avoid impacts, as the magnet may shatter into hazardous fragments.

Dust explosion hazard

Dust created during cutting of magnets is flammable. Avoid drilling into magnets without proper cooling and knowledge.

Phone sensors

A powerful magnetic field interferes with the functioning of compasses in phones and navigation systems. Keep magnets close to a smartphone to prevent damaging the sensors.

Medical implants

Life threat: Neodymium magnets can turn off pacemakers and defibrillators. Do not approach if you have medical devices.

Nickel allergy

Medical facts indicate that nickel (the usual finish) is a common allergen. For allergy sufferers, prevent direct skin contact or choose encased magnets.

Bone fractures

Risk of injury: The attraction force is so great that it can cause blood blisters, crushing, and broken bones. Protective gloves are recommended.

Do not give to children

Product intended for adults. Tiny parts pose a choking risk, leading to serious injuries. Keep away from children and animals.

Permanent damage

Keep cool. Neodymium magnets are sensitive to temperature. If you require resistance above 80°C, look for special high-temperature series (H, SH, UH).

Do not underestimate power

Exercise caution. Neodymium magnets attract from a long distance and snap with massive power, often quicker than you can move away.

Magnetic media

Device Safety: Strong magnets can damage data carriers and sensitive devices (heart implants, hearing aids, mechanical watches).

Warning! More info about risks in the article: Magnet Safety Guide.