MW 12x1.5 / N38 - cylindrical magnet
cylindrical magnet
Catalog no 010442
GTIN/EAN: 5906301811114
Diameter Ø
12 mm [±0,1 mm]
Height
1.5 mm [±0,1 mm]
Weight
1.27 g
Magnetization Direction
↑ axial
Load capacity
0.87 kg / 8.51 N
Magnetic Induction
150.32 mT / 1503 Gs
Coating
[NiCuNi] Nickel
0.431 ZŁ with VAT / pcs + price for transport
0.350 ZŁ net + 23% VAT / pcs
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Technical - MW 12x1.5 / N38 - cylindrical magnet
Specification / characteristics - MW 12x1.5 / N38 - cylindrical magnet
| properties | values |
|---|---|
| Cat. no. | 010442 |
| GTIN/EAN | 5906301811114 |
| Production/Distribution | Dhit sp. z o.o. |
| Country of origin | Poland / China / Germany |
| Customs code | 85059029 |
| Diameter Ø | 12 mm [±0,1 mm] |
| Height | 1.5 mm [±0,1 mm] |
| Weight | 1.27 g |
| Magnetization Direction | ↑ axial |
| Load capacity ~ ? | 0.87 kg / 8.51 N |
| Magnetic Induction ~ ? | 150.32 mT / 1503 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 magnet - data
The following data represent the result of a mathematical calculation. Results were calculated on algorithms for the material Nd2Fe14B. Actual conditions might slightly differ. Use these data as a preliminary roadmap during assembly planning.
Table 1: Static force (pull vs distance) - characteristics
MW 12x1.5 / N38
| Distance (mm) | Induction (Gauss) / mT | Pull Force (kg/lbs/g/N) | Risk Status |
|---|---|---|---|
| 0 mm |
1503 Gs
150.3 mT
|
0.87 kg / 1.92 lbs
870.0 g / 8.5 N
|
low risk |
| 1 mm |
1365 Gs
136.5 mT
|
0.72 kg / 1.58 lbs
718.1 g / 7.0 N
|
low risk |
| 2 mm |
1163 Gs
116.3 mT
|
0.52 kg / 1.15 lbs
521.4 g / 5.1 N
|
low risk |
| 3 mm |
947 Gs
94.7 mT
|
0.35 kg / 0.76 lbs
345.7 g / 3.4 N
|
low risk |
| 5 mm |
587 Gs
58.7 mT
|
0.13 kg / 0.29 lbs
132.6 g / 1.3 N
|
low risk |
| 10 mm |
180 Gs
18.0 mT
|
0.01 kg / 0.03 lbs
12.5 g / 0.1 N
|
low risk |
| 15 mm |
70 Gs
7.0 mT
|
0.00 kg / 0.00 lbs
1.9 g / 0.0 N
|
low risk |
| 20 mm |
33 Gs
3.3 mT
|
0.00 kg / 0.00 lbs
0.4 g / 0.0 N
|
low risk |
| 30 mm |
11 Gs
1.1 mT
|
0.00 kg / 0.00 lbs
0.0 g / 0.0 N
|
low risk |
| 50 mm |
3 Gs
0.3 mT
|
0.00 kg / 0.00 lbs
0.0 g / 0.0 N
|
low risk |
Table 2: Shear force (wall)
MW 12x1.5 / N38
| Distance (mm) | Friction coefficient | Pull Force (kg/lbs/g/N) |
|---|---|---|
| 0 mm | Stal (~0.2) |
0.17 kg / 0.38 lbs
174.0 g / 1.7 N
|
| 1 mm | Stal (~0.2) |
0.14 kg / 0.32 lbs
144.0 g / 1.4 N
|
| 2 mm | Stal (~0.2) |
0.10 kg / 0.23 lbs
104.0 g / 1.0 N
|
| 3 mm | Stal (~0.2) |
0.07 kg / 0.15 lbs
70.0 g / 0.7 N
|
| 5 mm | Stal (~0.2) |
0.03 kg / 0.06 lbs
26.0 g / 0.3 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
|
Table 3: Wall mounting (sliding) - behavior on slippery surfaces
MW 12x1.5 / N38
| Surface type | Friction coefficient / % Mocy | Max load (kg/lbs/g/N) |
|---|---|---|
| Raw steel |
µ = 0.3
30% Nominalnej Siły
|
0.26 kg / 0.58 lbs
261.0 g / 2.6 N
|
| Painted steel (standard) |
µ = 0.2
20% Nominalnej Siły
|
0.17 kg / 0.38 lbs
174.0 g / 1.7 N
|
| Oily/slippery steel |
µ = 0.1
10% Nominalnej Siły
|
0.09 kg / 0.19 lbs
87.0 g / 0.9 N
|
| Magnet with anti-slip rubber |
µ = 0.5
50% Nominalnej Siły
|
0.44 kg / 0.96 lbs
435.0 g / 4.3 N
|
Table 4: Material efficiency (substrate influence) - power losses
MW 12x1.5 / N38
| Steel thickness (mm) | % power | Real pull force (kg/lbs/g/N) |
|---|---|---|
| 0.5 mm |
|
0.09 kg / 0.19 lbs
87.0 g / 0.9 N
|
| 1 mm |
|
0.22 kg / 0.48 lbs
217.5 g / 2.1 N
|
| 2 mm |
|
0.44 kg / 0.96 lbs
435.0 g / 4.3 N
|
| 3 mm |
|
0.65 kg / 1.44 lbs
652.5 g / 6.4 N
|
| 5 mm |
|
0.87 kg / 1.92 lbs
870.0 g / 8.5 N
|
| 10 mm |
|
0.87 kg / 1.92 lbs
870.0 g / 8.5 N
|
| 11 mm |
|
0.87 kg / 1.92 lbs
870.0 g / 8.5 N
|
| 12 mm |
|
0.87 kg / 1.92 lbs
870.0 g / 8.5 N
|
Table 5: Working in heat (material behavior) - power drop
MW 12x1.5 / N38
| Ambient temp. (°C) | Power loss | Remaining pull (kg/lbs/g/N) | Status |
|---|---|---|---|
| 20 °C | 0.0% |
0.87 kg / 1.92 lbs
870.0 g / 8.5 N
|
OK |
| 40 °C | -2.2% |
0.85 kg / 1.88 lbs
850.9 g / 8.3 N
|
OK |
| 60 °C | -4.4% |
0.83 kg / 1.83 lbs
831.7 g / 8.2 N
|
|
| 80 °C | -6.6% |
0.81 kg / 1.79 lbs
812.6 g / 8.0 N
|
|
| 100 °C | -28.8% |
0.62 kg / 1.37 lbs
619.4 g / 6.1 N
|
Table 6: Two magnets (attraction) - field range
MW 12x1.5 / N38
| Gap (mm) | Attraction (kg/lbs) (N-S) | Lateral Force (kg/lbs/g/N) | Repulsion (kg/lbs) (N-N) |
|---|---|---|---|
| 0 mm |
1.57 kg / 3.47 lbs
2 770 Gs
|
0.24 kg / 0.52 lbs
236 g / 2.3 N
|
N/A |
| 1 mm |
1.46 kg / 3.21 lbs
2 891 Gs
|
0.22 kg / 0.48 lbs
219 g / 2.1 N
|
1.31 kg / 2.89 lbs
~0 Gs
|
| 2 mm |
1.30 kg / 2.87 lbs
2 731 Gs
|
0.19 kg / 0.43 lbs
195 g / 1.9 N
|
1.17 kg / 2.58 lbs
~0 Gs
|
| 3 mm |
1.12 kg / 2.48 lbs
2 538 Gs
|
0.17 kg / 0.37 lbs
168 g / 1.7 N
|
1.01 kg / 2.23 lbs
~0 Gs
|
| 5 mm |
0.78 kg / 1.71 lbs
2 109 Gs
|
0.12 kg / 0.26 lbs
116 g / 1.1 N
|
0.70 kg / 1.54 lbs
~0 Gs
|
| 10 mm |
0.24 kg / 0.53 lbs
1 173 Gs
|
0.04 kg / 0.08 lbs
36 g / 0.4 N
|
0.22 kg / 0.48 lbs
~0 Gs
|
| 20 mm |
0.02 kg / 0.05 lbs
361 Gs
|
0.00 kg / 0.01 lbs
3 g / 0.0 N
|
0.02 kg / 0.05 lbs
~0 Gs
|
| 50 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
|
| 60 mm |
0.00 kg / 0.00 lbs
22 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
14 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
10 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
7 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
5 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) - precautionary measures
MW 12x1.5 / N38
| Object / Device | Limit (Gauss) / mT | Safe distance |
|---|---|---|
| Pacemaker | 5 Gs (0.5 mT) | 4.0 cm |
| Hearing aid | 10 Gs (1.0 mT) | 3.5 cm |
| Mechanical watch | 20 Gs (2.0 mT) | 2.5 cm |
| Phone / Smartphone | 40 Gs (4.0 mT) | 2.0 cm |
| Remote | 50 Gs (5.0 mT) | 2.0 cm |
| Payment card | 400 Gs (40.0 mT) | 1.0 cm |
| HDD hard drive | 600 Gs (60.0 mT) | 0.5 cm |
Table 8: Dynamics (kinetic energy) - warning
MW 12x1.5 / N38
| Start from (mm) | Speed (km/h) | Energy (J) | Predicted outcome |
|---|---|---|---|
| 10 mm |
26.63 km/h
(7.40 m/s)
|
0.03 J | |
| 30 mm |
45.72 km/h
(12.70 m/s)
|
0.10 J | |
| 50 mm |
59.02 km/h
(16.40 m/s)
|
0.17 J | |
| 100 mm |
83.47 km/h
(23.19 m/s)
|
0.34 J |
Table 9: Corrosion resistance
MW 12x1.5 / 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 12x1.5 / N38
| Parameter | Value | SI Unit / Description |
|---|---|---|
| Magnetic Flux | 2 159 Mx | 21.6 µWb |
| Pc Coefficient | 0.19 | Low (Flat) |
Table 11: Underwater work (magnet fishing)
MW 12x1.5 / N38
| Environment | Effective steel pull | Effect |
|---|---|---|
| Air (land) | 0.87 kg | Standard |
| Water (riverbed) |
1.00 kg
(+0.13 kg buoyancy gain)
|
+14.5% |
1. Wall mount (shear)
*Warning: On a vertical wall, the magnet retains only ~20% of its nominal pull.
2. Efficiency vs thickness
*Thin steel (e.g. computer case) severely weakens the holding force.
3. Thermal stability
*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) = 0.19
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% |
Environmental data
| recyclability (EoL) | 100% |
| recycled raw materials | ~10% (pre-cons) |
| carbon footprint | low / zredukowany |
| waste code (EWC) | 16 02 16 |
Other offers
Strengths as well as weaknesses of Nd2Fe14B magnets.
Benefits
- They do not lose magnetism, even over approximately ten years – the decrease in lifting capacity is only ~1% (theoretically),
- Neodymium magnets are distinguished by remarkably resistant to demagnetization caused by magnetic disturbances,
- In other words, due to the glossy finish of silver, the element is aesthetically pleasing,
- They feature high magnetic induction at the operating surface, which improves attraction properties,
- Made from properly selected components, these magnets show impressive resistance to high heat, enabling them to function (depending on their shape) at temperatures up to 230°C and above...
- Thanks to versatility in constructing and the capacity to customize to client solutions,
- Key role in high-tech industry – they are commonly used in hard drives, electric motors, medical devices, and other advanced devices.
- Relatively small size with high pulling force – neodymium magnets offer strong magnetic field in small dimensions, which enables their usage in compact constructions
Limitations
- At very strong impacts they can crack, therefore we recommend placing them in strong housings. A metal housing provides additional protection against damage, as well as increases the magnet's durability.
- When exposed to high temperature, neodymium magnets suffer a drop in power. Often, when the temperature exceeds 80°C, their strength 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
- They rust in a humid environment. For use outdoors we advise using waterproof magnets e.g. in rubber, plastic
- Due to limitations in realizing nuts and complicated shapes in magnets, we propose using casing - magnetic mechanism.
- Potential hazard to health – tiny shards of magnets are risky, when accidentally swallowed, which gains importance in the context of child health protection. Additionally, tiny parts of these magnets are able to be problematic in diagnostics medical in case of swallowing.
- High unit price – neodymium magnets cost more than other types of magnets (e.g. ferrite), which hinders application in large quantities
Pull force analysis
Maximum lifting force for a neodymium magnet – what contributes to it?
- with the use of a sheet made of special test steel, ensuring full magnetic saturation
- possessing a massiveness of min. 10 mm to ensure full flux closure
- with an ideally smooth touching surface
- with zero gap (no coatings)
- under vertical application of breakaway force (90-degree angle)
- at standard ambient temperature
Magnet lifting force in use – key factors
- Space between surfaces – every millimeter of distance (caused e.g. by veneer or dirt) diminishes the pulling force, often by half at just 0.5 mm.
- Force direction – note 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.
- Plate thickness – insufficiently thick steel causes magnetic saturation, causing part of the power to be wasted into the air.
- Steel type – low-carbon steel gives the best results. Alloy admixtures lower magnetic properties and lifting capacity.
- Surface structure – the more even the plate, the larger the contact zone and stronger the hold. Unevenness creates an air distance.
- Heat – neodymium magnets have a sensitivity to temperature. When it is hot they are weaker, and in frost they can be stronger (up to a certain limit).
Lifting capacity was determined by applying a smooth steel plate of optimal thickness (min. 20 mm), under perpendicular pulling force, whereas under shearing force the load capacity is reduced by as much as 5 times. In addition, even a slight gap between the magnet’s surface and the plate lowers the load capacity.
Precautions when working with NdFeB magnets
Handling rules
Before use, read the rules. Uncontrolled attraction can break the magnet or injure your hand. Think ahead.
Material brittleness
Despite the nickel coating, the material is delicate and cannot withstand shocks. Avoid impacts, as the magnet may shatter into sharp, dangerous pieces.
Fire risk
Powder created during grinding of magnets is combustible. Do not drill into magnets without proper cooling and knowledge.
Pacemakers
Medical warning: Neodymium magnets can turn off pacemakers and defibrillators. Do not approach if you have electronic implants.
Compass and GPS
Note: rare earth magnets generate a field that interferes with precision electronics. Keep a separation from your mobile, device, and GPS.
Hand protection
Watch your fingers. Two large magnets will join immediately with a force of massive weight, destroying anything in their path. Be careful!
Warning for allergy sufferers
Allergy Notice: The nickel-copper-nickel coating contains nickel. If skin irritation occurs, immediately stop working with magnets and use protective gear.
Do not overheat magnets
Standard neodymium magnets (N-type) undergo demagnetization when the temperature goes above 80°C. This process is irreversible.
Do not give to children
Strictly store magnets away from children. Risk of swallowing is high, and the consequences of magnets clamping inside the body are fatal.
Data carriers
Do not bring magnets near a wallet, computer, or screen. The magnetic field can destroy these devices and erase data from cards.
