MW 12x10 / N38 - cylindrical magnet
cylindrical magnet
Catalog no 010016
GTIN/EAN: 5906301810155
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 ZŁ 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 | values |
|---|---|
| Cat. no. | 010016 |
| GTIN/EAN | 5906301810155 |
| Production/Distribution | Dhit sp. z o.o. |
| 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
| 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
| 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 modeling of the product - technical parameters
These data are the direct effect of a physical simulation. Results rely on algorithms for the class Nd2Fe14B. Actual conditions might slightly differ. Treat these calculations as a preliminary roadmap for designers.
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
|
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 |
Table 2: Vertical capacity (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
|
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: Material efficiency (substrate influence) - power losses
MW 12x10 / N38
| Steel thickness (mm) | % power | Real pull force (kg/lbs/g/N) |
|---|---|---|
| 0.5 mm |
|
0.48 kg / 1.06 lbs
483.0 g / 4.7 N
|
| 1 mm |
|
1.21 kg / 2.66 lbs
1207.5 g / 11.8 N
|
| 2 mm |
|
2.42 kg / 5.32 lbs
2415.0 g / 23.7 N
|
| 3 mm |
|
3.62 kg / 7.99 lbs
3622.5 g / 35.5 N
|
| 5 mm |
|
4.83 kg / 10.65 lbs
4830.0 g / 47.4 N
|
| 10 mm |
|
4.83 kg / 10.65 lbs
4830.0 g / 47.4 N
|
| 11 mm |
|
4.83 kg / 10.65 lbs
4830.0 g / 47.4 N
|
| 12 mm |
|
4.83 kg / 10.65 lbs
4830.0 g / 47.4 N
|
Table 5: Thermal stability (stability) - 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
|
Table 6: Two magnets (attraction) - field range
MW 12x10 / N38
| Gap (mm) | Attraction (kg/lbs) (N-S) | Shear 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: 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 |
| 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: 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 |
Table 9: Corrosion resistance
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: Construction data (Pc)
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% |
1. Shear force
*Warning: On a vertical surface, the magnet holds just a fraction of its perpendicular strength.
2. Steel thickness impact
*Thin steel (e.g. computer case) severely weakens the holding force.
3. Thermal stability
*For N38 grade, 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.
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 |
Check out also products
Strengths as well as weaknesses of rare earth magnets.
Strengths
- They retain full power for almost ten years – the drop is just ~1% (according to analyses),
- Neodymium magnets are remarkably resistant to demagnetization caused by external interference,
- By using a shiny layer of gold, the element presents an elegant look,
- They feature high magnetic induction at the operating surface, making them more effective,
- Through (appropriate) combination of ingredients, they can achieve high thermal strength, enabling action at temperatures reaching 230°C and above...
- Possibility of accurate forming and adjusting to defined conditions,
- Versatile presence in high-tech industry – they find application in HDD drives, electromotive mechanisms, precision medical tools, also complex engineering applications.
- Thanks to their power density, small magnets offer high operating force, in miniature format,
Cons
- At strong impacts they can crack, therefore we advise placing them in special holders. A metal housing provides additional protection against damage, as well as increases the magnet's durability.
- Neodymium magnets lose their power under the influence of heating. As soon as 80°C is exceeded, many of them start losing their power. Therefore, we recommend our special magnets marked [AH], which maintain stability even at temperatures up to 230°C
- Due to the susceptibility of magnets to corrosion in a humid environment, we suggest using waterproof magnets made of rubber, plastic or other material resistant to moisture, when using outdoors
- We recommend casing - magnetic holder, due to difficulties in realizing threads inside the magnet and complex shapes.
- Possible danger resulting from small fragments of magnets can be dangerous, if swallowed, which is particularly important in the context of child health protection. Furthermore, tiny parts of these devices can complicate diagnosis medical when they are in the body.
- With budget limitations the cost of neodymium magnets can be a barrier,
Holding force characteristics
Maximum lifting force for a neodymium magnet – what contributes to it?
- with the contact of a yoke made of low-carbon steel, ensuring full magnetic saturation
- with a thickness no less than 10 mm
- with a plane perfectly flat
- without any clearance between the magnet and steel
- for force acting at a right angle (pull-off, not shear)
- at ambient temperature approx. 20 degrees Celsius
Impact of factors on magnetic holding capacity in practice
- Distance (betwixt the magnet and the plate), because even a microscopic clearance (e.g. 0.5 mm) leads to a drastic drop in force by up to 50% (this also applies to varnish, rust or dirt).
- Force direction – catalog parameter refers to pulling vertically. When applying parallel force, the magnet holds significantly lower power (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 – ideal substrate is pure iron steel. Hardened steels may generate lower lifting capacity.
- Surface quality – the smoother and more polished the plate, the better the adhesion and stronger the hold. Unevenness creates an air distance.
- Heat – neodymium magnets have a sensitivity to temperature. When it is hot they lose power, and at low temperatures gain strength (up to a certain limit).
Lifting capacity testing was carried out on plates with a smooth surface of optimal thickness, under a perpendicular pulling force, whereas under attempts to slide the magnet the load capacity is reduced by as much as 75%. Additionally, even a slight gap between the magnet’s surface and the plate decreases the load capacity.
Warnings
Dust explosion hazard
Dust produced during machining of magnets is self-igniting. Avoid drilling into magnets unless you are an expert.
Keep away from computers
Do not bring magnets close to a purse, computer, or screen. The magnetic field can irreversibly ruin these devices and wipe information from cards.
Do not give to children
Only for adults. Tiny parts pose a choking risk, leading to serious injuries. Store out of reach of children and animals.
Magnets are brittle
Neodymium magnets are ceramic materials, which means they are very brittle. Collision of two magnets will cause them cracking into small pieces.
Skin irritation risks
Warning for allergy sufferers: The Ni-Cu-Ni coating contains nickel. If an allergic reaction appears, cease working with magnets and use protective gear.
Power loss in heat
Control the heat. Exposing the magnet to high heat will permanently weaken its properties and strength.
Hand protection
Large magnets can smash fingers in a fraction of a second. Do not put your hand betwixt two attracting surfaces.
Phone sensors
GPS units and smartphones are extremely susceptible to magnetism. Direct contact with a strong magnet can ruin the internal compass in your phone.
Health Danger
Health Alert: Strong magnets can turn off heart devices and defibrillators. Do not approach if you have medical devices.
Handling rules
Before starting, check safety instructions. Uncontrolled attraction can destroy the magnet or hurt your hand. Think ahead.
