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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

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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

Physical simulation of the product - data

Presented information represent the result of a physical analysis. Results rely on algorithms for the material Nd2Fe14B. Operational performance may deviate from the simulation results. Use these calculations as a reference point during assembly planning.

Table 1: Static force (force vs gap) - interaction chart
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
 strong
1 mm 4424 Gs
442.4 mT
 3.36 kg / 7.40 LBS
3355.3 g / 32.9 N
 strong
2 mm 3585 Gs
358.5 mT
 2.20 kg / 4.86 LBS
2203.4 g / 21.6 N
 strong
3 mm 2857 Gs
285.7 mT
 1.40 kg / 3.08 LBS
1399.2 g / 13.7 N
 low risk
5 mm 1787 Gs
178.7 mT
 0.55 kg / 1.21 LBS
547.8 g / 5.4 N
 low risk
10 mm 622 Gs
62.2 mT
 0.07 kg / 0.15 LBS
66.3 g / 0.7 N
 low risk
15 mm 272 Gs
27.2 mT
 0.01 kg / 0.03 LBS
12.7 g / 0.1 N
 low risk
20 mm 141 Gs
14.1 mT
 0.00 kg / 0.01 LBS
3.4 g / 0.0 N
 low risk
30 mm 52 Gs
5.2 mT
 0.00 kg / 0.00 LBS
0.5 g / 0.0 N
 low risk
50 mm 13 Gs
1.3 mT
 0.00 kg / 0.00 LBS
0.0 g / 0.0 N
 low risk
Magnetic force weakens significantly with every mm of spacing. Remember that even a microscopic distance (e.g., dirt, varnish, rust) noticeably diminishes the holding power. Magnetic products hold optimally at the point of direct contact; air break nullifies the force. Observe how quickly the parameters fall, when the product does not touch tightly to the steel surface. When designing the assembly, avoid additional spacers.

Table 2: Slippage hold (wall)
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
The table below presents the approximate force needed to start the slippage of the magnet down against a vertical metal surface (assuming typical friction). 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 holder on a vertical plane (e.g., a board), it will maintain just approx. 20%-30% of its nominal power. Gravitational force as well as a low friction coefficient mean that magnets slide down easier than they detach. Want to create a vertical fastening? Note that the shear force is significantly lower than the maximum static pull force. On a smooth steel, the element will give way down under a noticeably lighter weight. Utilizing a rubberized layer can effectively improve the result.

Table 4: Steel thickness (saturation) - 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 sheet is unable to take in the full magnetic flux, which wastes potential of the magnet. If you mount a strong magnet to a weak sheet, the magnetism will penetrate right through and the attraction force will be weaker. To utilize the maximum of this neodymium's potential, you require a sufficiently solid piece of steel. The saturation phenomenon means that on sheet metal structures (e.g., thin profiles), the product works worse. We suggest choosing the steel thickness from these parameters.

Table 5: Working in heat (stability) - resistance threshold
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 lose parameters past the thermal threshold. Watch out for overheating – high temperature can permanently demagnetize this product. As the temperature rises, the magnet's power temporarily decreases. Do not use this magnet close to heaters exceeding its safe range. Exceeding the critical threshold will lead to irreversible degradation of magnetism.
*Engineering note: Heat tolerance is determined by both grade, as well as the dimension ratios. Flat magnets (low Pc) are more susceptible to demagnetization sooner compared to rod magnets. Red status in the table points to permanent field degradation for this specific geometry.

Table 6: Magnet-Magnet interaction (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 magnetic products attract each other from a much further distance than a neodymium and metal setup. The connection of magnet-to-magnet produces a massive flux and a larger range of operation. Planning to create a powerful holder? Apply two magnets instead of one magnet and a steel. Remember that when connecting a pair of magnets, the pinch force is massive. The repulsion force is slightly lower than the connection force, but still impressive.
*Flux density in repulsion mode is approximately ~0 Gs at the geometric center of the gap (due to field cancellation).
Note: Results show sliding force of a pair of same neodymium magnets (friction ~0.15 for Ni-Ni layer).

Table 7: Hazards (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
Timepiece 20 Gs (2.0 mT) 4.5 cm
Mobile device 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
A strong magnetic field poses a large risk to IT equipment and medical implants. These magnets generate a flux that disrupts operation of digital equipment. Notice: the invisible magnetic field passes through tissues and glass. Special caution must be taken by people with cochlear implants and drug dispensers. The risk also applies to: automatic timepieces, remotes, membranes, and displays. Avoid contact with magnetic cards, hard drives, or sensitive navigation tools.

Table 8: Dynamics (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
Neodymium magnets are very brittle – a collision with steel causes immediate chipping. Watch the impact speed – a neodymium left loose becomes dangerous. Impact energy can destroy the magnet or painful pinches to skin. Hold the magnet firmly 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 means shattering of the neodymium. Wear eye protection 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 SST (salt spray test) is an industry standard for determining coating lifespan in harsh conditions. The silver nickel coating also serves an aesthetic function but is not fully waterproof.

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)
Total magnetic flux passing through the magnet pole. Essential parameter when building generators as well as sensors. Pc value 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%
Rust risk: Standard nickel requires drying after every contact with moisture; lack of maintenance will lead to rust spots.
The magnetic field penetrates through water without any losses. Note: for permanent underwater work, we recommend magnets with an anti-corrosive (epoxy) coating.
1. Sliding resistance

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

2. Steel thickness impact

*Thin steel (e.g. computer case) significantly weakens 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) = 0.81

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 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%
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
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The presented product is a very strong cylindrical magnet, composed of advanced NdFeB material, which, with dimensions of Ø12x10 mm, guarantees optimal power. This specific item features high dimensional repeatability and industrial build quality, making it a perfect solution for the most demanding engineers and designers. As a cylindrical magnet with impressive force (approx. 4.83 kg), this product is in stock from our European logistics center, ensuring quick order fulfillment. Furthermore, its Ni-Cu-Ni coating shields it against corrosion in standard operating conditions, guaranteeing an aesthetic appearance and durability for years.
It finds application in DIY projects, advanced robotics, and broadly understood industry, serving as a positioning or actuating element. Thanks to the high power of 47.41 N with a weight of only 8.48 g, this cylindrical magnet is indispensable in miniature devices and wherever low weight is crucial.
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 stability 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 strong enough for 90% of applications in automation and machine building, where extreme miniaturization with maximum force is not required. 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 key parameter here is the holding force amounting to approximately 4.83 kg (force ~47.41 N), which, with such defined dimensions, proves the high power of the NdFeB material. The product has a [NiCuNi] coating, which secures it against oxidation, 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 rare earth magnets.

Pros

Besides their exceptional magnetic power, neodymium magnets offer the following advantages:
  • They do not lose power, even over around 10 years – the decrease in strength is only ~1% (theoretically),
  • They have excellent resistance to weakening of magnetic properties due to external magnetic sources,
  • By covering with a smooth layer of silver, the element presents an professional look,
  • Magnetic induction on the surface of the magnet is exceptional,
  • Due to their durability and thermal resistance, neodymium magnets are capable of operate (depending on the form) even at high temperatures reaching 230°C or more...
  • Due to the potential of precise shaping and customization to unique needs, neodymium magnets can be created in a variety of forms and dimensions, which amplifies use scope,
  • Fundamental importance in electronics industry – they are utilized in HDD drives, electric motors, medical equipment, also complex engineering applications.
  • Relatively small size with high pulling force – neodymium magnets offer high power in compact dimensions, which makes them useful in miniature devices

Disadvantages

Disadvantages of NdFeB magnets:
  • To avoid cracks under impact, we suggest using special steel holders. Such a solution secures the magnet and simultaneously improves its durability.
  • Neodymium magnets decrease their power under the influence of heating. As soon as 80°C is exceeded, many of them start losing their force. Therefore, we recommend our special magnets marked [AH], which maintain durability even at temperatures up to 230°C
  • Magnets exposed to a humid environment can corrode. Therefore during using outdoors, we suggest using water-impermeable magnets made of rubber, plastic or other material resistant to moisture
  • We suggest a housing - magnetic mechanism, due to difficulties in creating nuts inside the magnet and complex forms.
  • Potential hazard resulting from small fragments of magnets are risky, in case of ingestion, which becomes key in the aspect of protecting the youngest. Additionally, tiny parts of these magnets can be problematic in diagnostics medical in case of swallowing.
  • High unit price – neodymium magnets are more expensive than other types of magnets (e.g. ferrite), which increases costs of application in large quantities

Lifting parameters

Maximum lifting capacity of the magnet – what contributes to it?

The load parameter shown concerns the maximum value, measured under laboratory conditions, specifically:
  • with the use of a yoke made of special test steel, ensuring maximum field concentration
  • whose transverse dimension reaches at least 10 mm
  • with a plane perfectly flat
  • without any air gap between the magnet and steel
  • for force acting at a right angle (pull-off, not shear)
  • at ambient temperature approx. 20 degrees Celsius

Magnet lifting force in use – key factors

Effective lifting capacity is influenced by specific conditions, mainly (from priority):
  • Distance (betwixt the magnet and the metal), since even a very small clearance (e.g. 0.5 mm) can cause a decrease in force by up to 50% (this also applies to paint, corrosion or debris).
  • Angle of force application – maximum parameter is available only during pulling at a 90° angle. The shear force of the magnet along the plate is typically several times lower (approx. 1/5 of the lifting capacity).
  • Base massiveness – too thin plate causes magnetic saturation, causing part of the power to be lost into the air.
  • Plate material – low-carbon steel attracts best. Higher carbon content lower magnetic properties and holding force.
  • Smoothness – full contact is possible only on polished steel. Any scratches and bumps create air cushions, weakening the magnet.
  • Thermal environment – temperature increase causes a temporary drop of induction. Check the thermal limit for a given model.

Lifting capacity testing was carried out on plates with a smooth surface of suitable thickness, under perpendicular forces, in contrast under parallel forces the holding force is lower. Additionally, even a small distance between the magnet and the plate decreases the holding force.

Safety rules for work with NdFeB magnets
Dust is flammable

Combustion risk: Rare earth powder is highly flammable. Do not process magnets in home conditions as this may cause fire.

Magnetic interference

Remember: rare earth magnets produce a field that interferes with sensitive sensors. Maintain a safe distance from your phone, device, and GPS.

Heat sensitivity

Standard neodymium magnets (grade N) lose magnetization when the temperature exceeds 80°C. The loss of strength is permanent.

Swallowing risk

Strictly store magnets out of reach of children. Ingestion danger is high, and the effects of magnets connecting inside the body are fatal.

Conscious usage

Before starting, check safety instructions. Sudden snapping can destroy the magnet or hurt your hand. Be predictive.

Medical implants

Warning for patients: Powerful magnets disrupt medical devices. Maintain at least 30 cm distance or request help to handle the magnets.

Eye protection

NdFeB magnets are sintered ceramics, which means they are prone to chipping. Collision of two magnets will cause them cracking into shards.

Nickel allergy

Nickel alert: The nickel-copper-nickel coating contains nickel. If an allergic reaction appears, immediately stop working with magnets and wear gloves.

Crushing risk

Mind your fingers. Two large magnets will join immediately with a force of massive weight, destroying anything in their path. Exercise extreme caution!

Protect data

Device Safety: Strong magnets can damage payment cards and sensitive devices (heart implants, medical aids, mechanical watches).

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