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
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Technical - 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 |
Technical simulation of the assembly - data
These information are the outcome of a mathematical calculation. Values were calculated on algorithms for the class Nd2Fe14B. Real-world performance may differ. Please consider these calculations as a reference point during assembly planning.
Table 1: Static 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
|
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
|
safe |
| 5 mm |
1787 Gs
178.7 mT
|
0.55 kg / 1.21 lbs
547.8 g / 5.4 N
|
safe |
| 10 mm |
622 Gs
62.2 mT
|
0.07 kg / 0.15 lbs
66.3 g / 0.7 N
|
safe |
| 15 mm |
272 Gs
27.2 mT
|
0.01 kg / 0.03 lbs
12.7 g / 0.1 N
|
safe |
| 20 mm |
141 Gs
14.1 mT
|
0.00 kg / 0.01 lbs
3.4 g / 0.0 N
|
safe |
| 30 mm |
52 Gs
5.2 mT
|
0.00 kg / 0.00 lbs
0.5 g / 0.0 N
|
safe |
| 50 mm |
13 Gs
1.3 mT
|
0.00 kg / 0.00 lbs
0.0 g / 0.0 N
|
safe |
Table 2: Vertical load (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 (saturation) - sheet metal selection
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 resistance (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: Magnet-Magnet interaction (attraction) - field collision
MW 12x10 / N38
| Gap (mm) | Attraction (kg/lbs) (N-S) | Lateral 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: Safety (HSE) (electronics) - 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 |
| Phone / Smartphone | 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: Impact energy (cracking risk) - warning
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: Electrical 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: 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% |
1. Shear force
*Note: On a vertical wall, the magnet retains just approx. 20-30% of its perpendicular strength.
2. Steel thickness impact
*Thin metal sheet (e.g. computer case) drastically reduces the holding force.
3. Thermal stability
*For standard magnets, the critical limit is 80°C.
4. Demagnetization curve and operating point (B-H)
chart generated for the permeance coefficient Pc (Permeance Coefficient) = 0.81
This simulation demonstrates the magnetic stability of the selected magnet under specific geometric conditions. 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.
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% |
Sustainability
| recyclability (EoL) | 100% |
| recycled raw materials | ~10% (pre-cons) |
| carbon footprint | low / zredukowany |
| waste code (EWC) | 16 02 16 |
Other offers
Pros as well as cons of Nd2Fe14B magnets.
Benefits
- They virtually do not lose strength, because even after ten years the decline in efficiency is only ~1% (according to literature),
- Neodymium magnets are distinguished by extremely resistant to loss of magnetic properties caused by external interference,
- The use of an aesthetic finish of noble metals (nickel, gold, silver) causes the element to look better,
- Magnets are characterized by impressive magnetic induction on the outer side,
- Through (appropriate) combination of ingredients, they can achieve high thermal resistance, allowing for functioning at temperatures approaching 230°C and above...
- Considering the possibility of accurate molding and customization to specialized solutions, magnetic components can be created in a wide range of geometric configurations, which makes them more universal,
- Significant place in high-tech industry – they are used in mass storage devices, brushless drives, medical equipment, also complex engineering applications.
- Relatively small size with high pulling force – neodymium magnets offer high power in small dimensions, which enables their usage in small systems
Weaknesses
- Susceptibility to cracking is one of their disadvantages. Upon strong impact they can break. We advise keeping them in a special holder, which not only protects them against impacts but also increases their 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 stability even at temperatures up to 230°C
- They rust in a humid environment. For use outdoors we advise using waterproof magnets e.g. in rubber, plastic
- Limited possibility of producing threads in the magnet and complicated shapes - preferred is casing - mounting mechanism.
- Health risk to health – tiny shards of magnets pose a threat, if swallowed, which is particularly important in the context of child safety. It is also worth noting that small components of these products are able to disrupt the diagnostic process medical in case of swallowing.
- Due to expensive raw materials, their price is relatively high,
Lifting parameters
Maximum lifting force for a neodymium magnet – what contributes to it?
- on a base made of mild steel, effectively closing the magnetic field
- whose transverse dimension is min. 10 mm
- characterized by even structure
- with direct contact (without paint)
- under axial force vector (90-degree angle)
- in temp. approx. 20°C
Impact of factors on magnetic holding capacity in practice
- Air gap (between the magnet and the metal), since even a tiny distance (e.g. 0.5 mm) results in a reduction in force by up to 50% (this also applies to paint, rust or dirt).
- Force direction – remember that the magnet has greatest strength perpendicularly. Under shear forces, the holding force drops drastically, often to levels of 20-30% of the nominal value.
- Steel thickness – insufficiently thick plate does not accept the full field, causing part of the flux to be wasted to the other side.
- Material composition – different alloys reacts the same. Alloy additives weaken the attraction effect.
- Smoothness – full contact is possible only on smooth steel. Any scratches and bumps create air cushions, reducing force.
- Temperature – heating the magnet results in weakening of induction. It is worth remembering the maximum operating temperature for a given model.
Lifting capacity testing was conducted on a smooth plate of optimal thickness, under perpendicular forces, however under shearing force the load capacity is reduced by as much as 75%. Moreover, even a small distance between the magnet and the plate lowers the lifting capacity.
Precautions when working with NdFeB magnets
Danger to pacemakers
Individuals with a pacemaker must keep an safe separation from magnets. The magnetism can stop the functioning of the implant.
Threat to navigation
Navigation devices and mobile phones are highly sensitive to magnetic fields. Close proximity with a strong magnet can decalibrate the sensors in your phone.
Nickel allergy
Warning for allergy sufferers: The nickel-copper-nickel coating consists of nickel. If skin irritation occurs, cease handling magnets and wear gloves.
Electronic devices
Very strong magnetic fields can destroy records on credit cards, HDDs, and other magnetic media. Stay away of at least 10 cm.
Magnets are brittle
NdFeB magnets are ceramic materials, which means they are prone to chipping. Impact of two magnets will cause them shattering into small pieces.
Do not overheat magnets
Regular neodymium magnets (grade N) undergo demagnetization when the temperature surpasses 80°C. The loss of strength is permanent.
Do not give to children
Product intended for adults. Small elements pose a choking risk, causing intestinal necrosis. Keep away from children and animals.
Conscious usage
Before starting, read the rules. Sudden snapping can destroy the magnet or injure your hand. Be predictive.
Fire risk
Dust generated during grinding of magnets is combustible. Do not drill into magnets without proper cooling and knowledge.
Physical harm
Watch your fingers. Two large magnets will snap together immediately with a force of massive weight, destroying anything in their path. Be careful!
