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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

technical details »

0.578 ZŁ with VAT / pcs + price for transport

0.470 ZŁ net + 23% VAT / pcs

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Physical properties - 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

Engineering simulation of the magnet - technical parameters

Presented information represent the result of a engineering calculation. Results rely on algorithms for the class Nd2Fe14B. Operational performance may differ from theoretical values. Use these data as a preliminary roadmap during assembly planning.

Table 1: Static pull force (pull vs gap) - 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
 low risk
1 mm 941 Gs
94.1 mT
 0.36 kg / 0.79 lbs
358.5 g / 3.5 N
 low risk
2 mm 812 Gs
81.2 mT
 0.27 kg / 0.59 lbs
266.8 g / 2.6 N
 low risk
3 mm 666 Gs
66.6 mT
 0.18 kg / 0.40 lbs
179.7 g / 1.8 N
 low risk
5 mm 415 Gs
41.5 mT
 0.07 kg / 0.15 lbs
69.7 g / 0.7 N
 low risk
10 mm 126 Gs
12.6 mT
 0.01 kg / 0.01 lbs
6.5 g / 0.1 N
 low risk
15 mm 49 Gs
4.9 mT
 0.00 kg / 0.00 lbs
1.0 g / 0.0 N
 low risk
20 mm 23 Gs
2.3 mT
 0.00 kg / 0.00 lbs
0.2 g / 0.0 N
 low risk
30 mm 7 Gs
0.7 mT
 0.00 kg / 0.00 lbs
0.0 g / 0.0 N
 low risk
50 mm 2 Gs
0.2 mT
 0.00 kg / 0.00 lbs
0.0 g / 0.0 N
 low risk
Pulling power decreases drastically per each millimeter of gap. Note that even a very thin break (e.g., dirt, varnish, dust) noticeably diminishes the holding power. Neodymiums operate strongest during direct contact; distance drastically cuts the force. See how rapidly the load capacity drop, when the magnet does not touch tightly to the metal substrate. When designing the arrangement, discard redundant distances.

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 table below shows the theoretical shear load sufficient to cause the sliding of the magnet down along a vertical metal surface (assuming typical friction coefficient). The holding force is relative to the air gap between the magnet and the metal.

Table 3: Vertical assembly (sliding) - vertical pull
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 placing a holder on a vertical wall (e.g., a car body), it will only hold just approx. 1/5 of nominal attraction strength. Gravitational force and a weak degree of grip influence the fact that products slip faster than they pop off the substrate. Want to create a wall mount? Consider that the shear force is noticeably lower than the maximum static pull force. On a painted metal, the holder will slide down under a much lighter cargo. Using a rubber coating can significantly improve the result.

Table 4: Material efficiency (saturation) - power losses
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 thin sheet is incapable of absorb the entire magnetic field, which squanders power of the magnet. If you attach a powerful product to a thin surface, the field will pass right through and the pull force will drop sharply. To utilize the maximum of this neodymium's potential, you need a suitably thick piece of steel. The saturation phenomenon means that on sheet metal structures (e.g., thin profiles), the product shows lower pull force. We advise picking the steel dimension based on the following data.

Table 5: Thermal stability (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 irreversibly lose parameters past the thermal threshold. Avoid high temperatures – heat can permanently damage this product. With increasing heat, the magnet's power temporarily lowers. Refrain from using this magnet in hot environments exceeding its operating temperature limit. Too high temperature will cause irreversible degradation of magnetic properties.
*Technical advisory: Heat tolerance depends not only on the material grade, as well as the dimension ratios. Flat magnets (pancake types) risk losing magnetic properties under lower heat stress than taller cylinders. Warning indicator in the table points to permanent field degradation for this specific geometry.

Table 6: Two magnets (attraction) - forces in the system
MW 12x1 / N38

Gap (mm) Attraction (kg/lbs) (N-S) Sliding 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 strong neodymiums interact from a much further distance than a neodymium and metal setup. The setup of magnet-to-magnet creates a more powerful interaction and a larger range of performance. Planning to create a strong closure? Apply two magnets instead of a neodymium and a steel. Remember that when bringing together two magnets, the pinch force is extreme. The levitation is marginally weaker than the attraction, but still large.
*Field value in repulsion mode reaches ~0 Gs in the exact middle of the gap (caused by magnetic field nullification).
Note: Calculations refer to friction force of two same neodymium magnets (friction coefficient ~0.15 for Ni-Ni layer).

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
Timepiece 20 Gs (2.0 mT) 2.5 cm
Phone / Smartphone 40 Gs (4.0 mT) 2.0 cm
Remote 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 poses a large risk to electronic devices and medical implants. These magnets produce a field that disrupts operation of sensitive medical devices. Notice: the unseen radiation penetrates the body and plastic. Special caution must be exercised by people with hearing aids and drug dispensers. Influence will be felt by: automatic timepieces, car keys, speakers, and displays. Do not place the magnet near cards, hard drives, or precise measuring instruments.

Table 8: Dynamics (kinetic energy) - warning
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
NdFeB products are delicate – a collision with steel risks their cracking. Pay attention to connection velocity – a neodymium left loose turns into a projectile. Impact energy can trigger coating fragments or injury to fingers. Hold the magnet firmly during mounting so it doesn't slam with momentum against the metal. A collision at high speed means shattering of the neodymium. Wear eye protection when playing with powerful specimens.

Table 9: Corrosion resistance
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. Moisture resistance is crucial for installations in bathrooms or outdoors.

Table 10: Electrical data (Pc)
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 emitted by the pole surface. Essential parameter when building generators and motors. The Pc coefficient defines the working geometry.

Table 11: Hydrostatics and buoyancy
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%
Rust risk: This magnet has a standard nickel coating. After use in water, it must be dried and maintained immediately, otherwise it will rust!
In water, the magnet feels stronger thanks to Archimedes' principle. However, remember the water resistance when pulling the rope quickly.
1. Vertical hold

*Caution: On a vertical surface, the magnet holds only approx. 20-30% of its max power.

2. Steel saturation

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

3. Thermal stability

*For N38 grade, the max working temp 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
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%
Ecology and recycling (GPSR)
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
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The presented product is a very strong cylinder magnet, composed of durable NdFeB material, which, at dimensions of Ø12x1 mm, guarantees the highest energy density. This specific item features high dimensional repeatability and professional build quality, making it an ideal solution for the most demanding engineers and designers. As a cylindrical magnet with significant force (approx. 0.42 kg), this product is in stock from our European logistics center, ensuring rapid order fulfillment. Additionally, its triple-layer Ni-Cu-Ni coating secures it against corrosion in standard operating conditions, guaranteeing an aesthetic appearance and durability for years.
This model is perfect for building electric motors, advanced sensors, and efficient magnetic separators, where field concentration on a small surface counts. Thanks to the high power of 4.15 N with a weight of only 0.85 g, this cylindrical magnet is indispensable in miniature devices and wherever every gram matters.
Since our magnets have a very precise dimensions, the recommended way is to glue them into holes with a slightly larger diameter (e.g., 12.1 mm) using epoxy glues. To ensure long-term durability in industry, specialized industrial adhesives are used, which are safe for nickel and fill the gap, guaranteeing high repeatability of the connection.
Magnets N38 are suitable for the majority of applications in automation and machine building, where excessive 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 store.
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. 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 through the diameter if your project requires it.

Strengths as well as weaknesses of neodymium magnets.

Advantages

Besides their exceptional field intensity, neodymium magnets offer the following advantages:
  • They do not lose power, even over nearly 10 years – the decrease in power is only ~1% (based on measurements),
  • They are extremely resistant to demagnetization induced by external field influence,
  • In other words, due to the glossy layer of nickel, the element looks attractive,
  • The surface of neodymium magnets generates a strong magnetic field – this is one of their assets,
  • Due to their durability and thermal resistance, neodymium magnets are capable of operate (depending on the shape) even at high temperatures reaching 230°C or more...
  • Considering the option of flexible molding and customization to individualized requirements, NdFeB magnets can be created in a wide range of forms and dimensions, which expands the range of possible applications,
  • Significant place in modern industrial fields – they are used in magnetic memories, motor assemblies, medical equipment, and industrial machines.
  • Thanks to concentrated force, small magnets offer high operating force, with minimal size,

Weaknesses

Disadvantages of NdFeB magnets:
  • They are prone to damage upon heavy 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
  • When exposed to high temperature, neodymium magnets suffer a drop in force. 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
  • Magnets exposed to a humid environment can rust. Therefore during using outdoors, we recommend using water-impermeable magnets made of rubber, plastic or other material resistant to moisture
  • Due to limitations in creating threads and complicated shapes in magnets, we recommend using casing - magnetic mechanism.
  • Possible danger related to microscopic parts of magnets can be dangerous, in case of ingestion, which becomes key in the aspect of protecting the youngest. It is also worth noting that tiny parts of these magnets are able to complicate diagnosis medical when they are in the body.
  • High unit price – neodymium magnets cost more than other types of magnets (e.g. ferrite), which hinders application in large quantities

Lifting parameters

Maximum magnetic pulling force – what affects it?

Information about lifting capacity was determined for the most favorable conditions, assuming:
  • using a plate made of high-permeability steel, serving as a circuit closing element
  • possessing a thickness of min. 10 mm to ensure full flux closure
  • with a plane cleaned and smooth
  • under conditions of gap-free contact (metal-to-metal)
  • under axial application of breakaway force (90-degree angle)
  • at temperature room level

Practical lifting capacity: influencing factors

Please note that the working load will differ depending on elements below, in order of importance:
  • Distance (betwixt the magnet and the plate), because even a tiny clearance (e.g. 0.5 mm) results in a drastic drop in force by up to 50% (this also applies to paint, rust or dirt).
  • Direction of force – highest force is reached only during perpendicular pulling. The shear force of the magnet along the plate is usually several times smaller (approx. 1/5 of the lifting capacity).
  • Steel thickness – too thin steel does not close the flux, causing part of the flux to be wasted to the other side.
  • Material composition – different alloys reacts the same. Alloy additives worsen the attraction effect.
  • Surface finish – ideal contact is possible only on polished steel. Rough texture create air cushions, weakening the magnet.
  • Temperature influence – hot environment weakens magnetic field. Exceeding the limit temperature can permanently demagnetize the magnet.

Lifting capacity was assessed using a steel plate with a smooth surface of optimal thickness (min. 20 mm), under perpendicular pulling force, whereas under parallel forces the holding force is lower. Additionally, even a minimal clearance between the magnet’s surface and the plate decreases the load capacity.

H&S for magnets
ICD Warning

For implant holders: Powerful magnets affect electronics. Maintain at least 30 cm distance or request help to work with the magnets.

Electronic devices

Equipment safety: Strong magnets can ruin payment cards and delicate electronics (pacemakers, medical aids, mechanical watches).

Heat sensitivity

Standard neodymium magnets (N-type) lose power when the temperature goes above 80°C. The loss of strength is permanent.

Machining danger

Drilling and cutting of neodymium magnets carries a risk of fire risk. Magnetic powder reacts violently with oxygen and is hard to extinguish.

GPS Danger

A strong magnetic field negatively affects the functioning of compasses in phones and GPS navigation. Do not bring magnets close to a smartphone to avoid damaging the sensors.

Eye protection

Beware of splinters. Magnets can fracture upon uncontrolled impact, launching sharp fragments into the air. Eye protection is mandatory.

Adults only

Product intended for adults. Small elements pose a choking risk, leading to serious injuries. Keep out of reach of children and animals.

Sensitization to coating

Certain individuals experience a sensitization to nickel, which is the typical protective layer for NdFeB magnets. Prolonged contact might lead to dermatitis. We recommend use protective gloves.

Serious injuries

Watch your fingers. Two powerful magnets will join immediately with a force of massive weight, destroying everything in their path. Be careful!

Caution required

Handle magnets with awareness. Their immense force can surprise even professionals. Be vigilant and do not underestimate their force.

Warning! More info about hazards in the article: Safety of working with magnets.