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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

check technical specifications »

3.03 ZŁ with VAT / pcs + price for transport

2.46 ZŁ net + 23% VAT / pcs

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Detailed specification - 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 modeling of the magnet - technical parameters

These values constitute the result of a physical analysis. Results are based on algorithms for the class Nd2Fe14B. Operational conditions may differ from theoretical values. Treat these data as a supplementary guide for designers.

Table 1: Static pull force (force vs distance) - characteristics
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
 medium risk
1 mm 4424 Gs
442.4 mT
 3.36 kg / 7.40 LBS
3355.3 g / 32.9 N
 medium risk
2 mm 3585 Gs
358.5 mT
 2.20 kg / 4.86 LBS
2203.4 g / 21.6 N
 medium risk
3 mm 2857 Gs
285.7 mT
 1.40 kg / 3.08 LBS
1399.2 g / 13.7 N
 weak grip
5 mm 1787 Gs
178.7 mT
 0.55 kg / 1.21 LBS
547.8 g / 5.4 N
 weak grip
10 mm 622 Gs
62.2 mT
 0.07 kg / 0.15 LBS
66.3 g / 0.7 N
 weak grip
15 mm 272 Gs
27.2 mT
 0.01 kg / 0.03 LBS
12.7 g / 0.1 N
 weak grip
20 mm 141 Gs
14.1 mT
 0.00 kg / 0.01 LBS
3.4 g / 0.0 N
 weak grip
30 mm 52 Gs
5.2 mT
 0.00 kg / 0.00 LBS
0.5 g / 0.0 N
 weak grip
50 mm 13 Gs
1.3 mT
 0.00 kg / 0.00 LBS
0.0 g / 0.0 N
 weak grip
Magnetic force decreases sharply with every mm of spacing. Keep in mind that even a microscopic distance (e.g., contamination, varnish, dust) significantly weakens the grip. Magnets hold most effectively in perfect adhesion; air break drastically cuts the force. Observe how quickly the parameters plummet, when the product does not touch directly to the metal substrate. When calculating the arrangement, discard redundant distances.

Table 2: Vertical hold (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
This section presents the estimated shear load necessary to initiate the shifting of the magnet down against a upright steel wall (considering standard friction coefficient). The holding force varies with the separation distance between the magnet and the metal.

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
When placing a element on a vertical wall (e.g., a car body), it you can count on just about 20%-30% of nominal attraction strength. Gravity and a low friction coefficient cause that products slip easier than they pull off. Planning a hanger? Remember that the shear force is significantly lower than the perpendicular breakaway force. On a smooth steel, the holder will give way down under a noticeably lighter load. Utilizing a rubberized pad can drastically improve the result.

Table 4: Material efficiency (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
A thin metal plate is incapable of take in the full magnetic flux, which weakens actual performance of the holder. Should you attach a powerful product to a weak sheet, the flux will penetrate right through and the attraction force will be weaker. To utilize the maximum of this neodymium's power, you require a sufficiently solid backing of steel. The saturation phenomenon means that on delicate walls (e.g., thin profiles), the magnet shows lower pull force. We suggest choosing the steel dimension according to the table below.

Table 5: Thermal resistance (material behavior) - power drop
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
Standard neodymium magnets change their properties strength past the thermal threshold. Avoid high temperatures – excessive heat can irreversibly damage this product. With increasing heat, the magnet's power temporarily drops. Avoid using this magnet close to ovens higher than its working range. Too high temperature will result in irreversible degradation of magnetism.
*Engineering note: Temperature resistance is determined by both grade, as well as the dimension ratios. Thin magnets (low Pc) are more susceptible to demagnetization sooner than long magnets. Red status in the table points to permanent field degradation for this particular item.

Table 6: Two magnets (attraction) - field range
MW 12x10 / N38

Gap (mm) Attraction (kg/lbs) (N-S) Shear Strength (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
Two strong neodymiums attract each other from a much further distance than a magnet and steel combination. The setup of magnet-to-magnet creates a more powerful interaction and a wider radius of action. Planning to create a solid fastener? Use a pair of magnets instead of a neodymium and a steel. Exercise caution that when bringing together two magnets, the collision energy is extreme. The repulsion force is slightly lower than the attraction, but still significant.
*Flux density between like poles reaches ~0 Gs at the geometric center of the gap (caused by magnetic field nullification).
Important: Estimates demonstrate sliding force of two matching neodymium magnets (friction coefficient ~0.15 for Ni-Ni layer).

Table 7: Protective zones (implants) - warnings
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
Mobile device 40 Gs (4.0 mT) 3.5 cm
Remote 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
Powerful magnet radiation is a large risk to electronics and medical implants. These NdFeB products generate a field that prevents correct functioning of sensitive medical devices. Notice: the invisible magnetic field passes through tissues and plastic. Exceptional care must be exercised by people with cochlear implants and insulin pumps. The risk also applies to: automatic timepieces, car keys, speakers, and screens. Do not bring the product near payment cards, hard drives, or precise measuring instruments.

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
Magnetic elements are prone to chipping – a collision with steel risks their cracking. Pay attention to connection velocity – a neodymium left loose speeds with massive force. Impact energy can trigger coating fragments or painful pinches to fingers. Hold the magnet firmly during bringing near metal so it doesn't hit with great force against the steel surface. A collision at high speed means shattering of the magnet. Use safety goggles when working with powerful specimens.

Table 9: Anti-corrosion coating durability
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)
The following table defines the conditions under which this product can be safely used. Moisture resistance is crucial for installations in bathrooms or outdoors.

Table 10: Construction data (Flux)
MW 12x10 / N38

Parameter Value SI Unit / Description
Magnetic Flux 6 105 Mx 61.1 µWb
Pc Coefficient 0.81 High (Stable)
Flux value emitted by the magnet pole. Essential parameter for generator designers and motors. The Pc coefficient defines the magnet's operating point.

Table 11: Hydrostatics and buoyancy
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%
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. Sliding resistance

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

2. Plate thickness effect

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

3. Temperature resistance

*For N38 material, the max working temp is 80°C.

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

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

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.

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%
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: 010016-2026
Magnet Unit Converter
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This product is an incredibly powerful cylinder magnet, manufactured from modern NdFeB material, which, with dimensions of Ø12x10 mm, guarantees the highest energy density. This specific item is characterized by high dimensional repeatability and professional build quality, making it an excellent solution for professional engineers and designers. As a cylindrical magnet with significant force (approx. 4.83 kg), this product is in stock 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, guaranteeing an aesthetic appearance and durability for years.
It finds application in DIY projects, advanced automation, and broadly understood industry, serving as a positioning or actuating element. Thanks to the pull force of 47.41 N with a weight of only 8.48 g, this rod is indispensable in miniature devices and wherever every gram matters.
Due to the delicate structure of the ceramic sinter, we absolutely advise against force-fitting (so-called press-fit), as this risks chipping the coating of this precision 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.
Grade N38 is the most frequently chosen standard for professional neodymium magnets, offering a great economic balance and operational stability. If you need the strongest magnets in the same volume (Ø12x10), contact us regarding higher grades (e.g., N50, N52), however, N38 is the standard in continuous sale in our store.
The presented product is a neodymium magnet with precisely defined parameters: diameter 12 mm and height 10 mm. 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.

Pros and cons of neodymium magnets.

Pros

Besides their durability, neodymium magnets are valued for these benefits:
  • They do not lose strength, even over nearly 10 years – the reduction in strength is only ~1% (based on measurements),
  • They are extremely resistant to demagnetization induced by external magnetic fields,
  • Thanks to the elegant finish, the layer of nickel, gold-plated, or silver-plated gives an modern appearance,
  • The surface of neodymium magnets generates a unique magnetic field – this is a distinguishing feature,
  • 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...
  • Possibility of detailed shaping as well as adapting to precise conditions,
  • Key role in advanced technology sectors – they serve a role in computer drives, electromotive mechanisms, medical equipment, and multitasking production systems.
  • Thanks to concentrated force, small magnets offer high operating force, in miniature format,

Limitations

What to avoid - cons of neodymium magnets: weaknesses and usage proposals
  • 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 improves its resistance to damage
  • NdFeB magnets lose power when exposed to high temperatures. After reaching 80°C, many of them experience permanent drop of strength (a factor is the shape as well as dimensions of the magnet). We offer magnets specially adapted to work at temperatures up to 230°C marked [AH], which are extremely resistant to heat
  • Due to the susceptibility of magnets to corrosion in a humid environment, we recommend using waterproof magnets made of rubber, plastic or other material immune to moisture, when using outdoors
  • Limited ability of making threads in the magnet and complex forms - recommended is cover - mounting mechanism.
  • Possible danger resulting from small fragments of magnets pose a threat, in case of ingestion, which becomes key in the context of child safety. Additionally, tiny parts of these magnets are able to be problematic in diagnostics medical after entering the body.
  • Due to expensive raw materials, their price is higher than average,

Lifting parameters

Maximum lifting force for a neodymium magnet – what contributes to it?

The force parameter is a measurement result conducted under specific, ideal conditions:
  • using a plate made of low-carbon steel, functioning as a circuit closing element
  • possessing a thickness of minimum 10 mm to avoid saturation
  • with an ideally smooth touching surface
  • under conditions of ideal adhesion (surface-to-surface)
  • under vertical force vector (90-degree angle)
  • at ambient temperature room level

Determinants of lifting force in real conditions

In real-world applications, the actual lifting capacity results from several key aspects, presented from the most important:
  • Air gap (between the magnet and the plate), because even a very small clearance (e.g. 0.5 mm) results in a decrease in force by up to 50% (this also applies to varnish, rust or debris).
  • Direction of force – maximum parameter is obtained only during perpendicular pulling. The resistance to sliding of the magnet along the plate is standardly many times lower (approx. 1/5 of the lifting capacity).
  • Wall thickness – the thinner the sheet, the weaker the hold. Part of the magnetic field passes through the material instead of generating force.
  • Material type – the best choice is high-permeability steel. Hardened steels may attract less.
  • Surface condition – smooth surfaces ensure maximum contact, which improves force. Uneven metal reduce efficiency.
  • Temperature – temperature increase results in weakening of force. Check the maximum operating temperature for a given model.

Lifting capacity was assessed with the use of a steel plate with a smooth surface of optimal thickness (min. 20 mm), under perpendicular detachment force, whereas under parallel forces the lifting capacity is smaller. Additionally, even a small distance between the magnet and the plate reduces the load capacity.

Warnings
Medical interference

For implant holders: Strong magnetic fields disrupt electronics. Maintain minimum 30 cm distance or ask another person to work with the magnets.

Danger to the youngest

Absolutely store magnets out of reach of children. Choking hazard is significant, and the consequences of magnets clamping inside the body are very dangerous.

Pinching danger

Protect your hands. Two large magnets will snap together instantly with a force of several hundred kilograms, crushing everything in their path. Exercise extreme caution!

Do not drill into magnets

Dust created during cutting of magnets is flammable. Do not drill into magnets unless you are an expert.

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.

Avoid contact if allergic

Certain individuals have a contact allergy to nickel, which is the typical protective layer for NdFeB magnets. Frequent touching may cause skin redness. We suggest wear safety gloves.

Respect the power

Handle magnets consciously. Their powerful strength can surprise even professionals. Plan your moves and respect their power.

Operating temperature

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

GPS and phone interference

An intense magnetic field negatively affects the operation of magnetometers in smartphones and GPS navigation. Maintain magnets near a device to prevent damaging the sensors.

Protective goggles

NdFeB magnets are sintered ceramics, meaning they are very brittle. Impact of two magnets will cause them cracking into shards.

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