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
- Coating
- [NiCuNi] Nickel
How we measure these parameters — certificates and measurements
0.350 zł net / pcs
0.431 zł with VAT (23% VAT) / pcs
bulk discounts:
Need more?Frequently asked questions
What is the maximum working temperature of a disc magnet?
What is the difference between N38, N42 and N52?
What is the dimensional tolerance?
Engineering report for this magnet
Full PDF analysis: pull and shear force, effect of distance, temperature and plate thickness, safety distances and the demagnetization curve.
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Technical data of the product - 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 |
|---|---|---|
| Remanence Br ? | 12.2-12.6 | kGs |
| Remanence Br ? | 1220-1260 | mT |
| Coercivity bHc ? | 10.8-11.5 | kOe |
| Coercivity bHc ? | 860-915 | kA/m |
| Intrinsic coercivity iHc | ≥ 12 | kOe |
| Intrinsic coercivity iHc | ≥ 955 | kA/m |
| Energy product BHmax ? | 36-38 | BH max MGOe |
| Energy product BHmax ? | 287-303 | BH max KJ/m |
| Maximum working 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 | 310 | °C |
| Curie Temperature TF | 590 | °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 - technical parameters
These values represent the result of a physical simulation. Values were calculated on models for the class Nd2Fe14B. Actual conditions may differ. Please consider these data as a preliminary roadmap during assembly planning.
Table 1: Static pull force (pull vs gap) - power drop
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 pounds
870.0 g / 8.5 N
|
safe |
| 1 mm |
1365 Gs
136.5 mT
|
0.72 kg / 1.58 pounds
718.1 g / 7.0 N
|
safe |
| 2 mm |
1163 Gs
116.3 mT
|
0.52 kg / 1.15 pounds
521.4 g / 5.1 N
|
safe |
| 3 mm |
947 Gs
94.7 mT
|
0.35 kg / 0.76 pounds
345.7 g / 3.4 N
|
safe |
| 5 mm |
587 Gs
58.7 mT
|
0.13 kg / 0.29 pounds
132.6 g / 1.3 N
|
safe |
| 10 mm |
180 Gs
18.0 mT
|
0.01 kg / 0.03 pounds
12.5 g / 0.1 N
|
safe |
| 15 mm |
70 Gs
7.0 mT
|
0.00 kg / 0.00 pounds
1.9 g / 0.0 N
|
safe |
| 20 mm |
33 Gs
3.3 mT
|
0.00 kg / 0.00 pounds
0.4 g / 0.0 N
|
safe |
| 30 mm |
11 Gs
1.1 mT
|
0.00 kg / 0.00 pounds
0.0 g / 0.0 N
|
safe |
| 50 mm |
3 Gs
0.3 mT
|
0.00 kg / 0.00 pounds
0.0 g / 0.0 N
|
safe |
Table 2: Slippage 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 pounds
174.0 g / 1.7 N
|
| 1 mm | Stal (~0.2) |
0.14 kg / 0.32 pounds
144.0 g / 1.4 N
|
| 2 mm | Stal (~0.2) |
0.10 kg / 0.23 pounds
104.0 g / 1.0 N
|
| 3 mm | Stal (~0.2) |
0.07 kg / 0.15 pounds
70.0 g / 0.7 N
|
| 5 mm | Stal (~0.2) |
0.03 kg / 0.06 pounds
26.0 g / 0.3 N
|
| 10 mm | Stal (~0.2) |
0.00 kg / 0.00 pounds
2.0 g / 0.0 N
|
| 15 mm | Stal (~0.2) |
0.00 kg / 0.00 pounds
0.0 g / 0.0 N
|
| 20 mm | Stal (~0.2) |
0.00 kg / 0.00 pounds
0.0 g / 0.0 N
|
| 30 mm | Stal (~0.2) |
0.00 kg / 0.00 pounds
0.0 g / 0.0 N
|
| 50 mm | Stal (~0.2) |
0.00 kg / 0.00 pounds
0.0 g / 0.0 N
|
Table 3: Wall mounting (shearing) - 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 pounds
261.0 g / 2.6 N
|
| Painted steel (standard) |
µ = 0.2
20% Nominalnej Siły
|
0.17 kg / 0.38 pounds
174.0 g / 1.7 N
|
| Oily/slippery steel |
µ = 0.1
10% Nominalnej Siły
|
0.09 kg / 0.19 pounds
87.0 g / 0.9 N
|
| Magnet with anti-slip rubber |
µ = 0.5
50% Nominalnej Siły
|
0.44 kg / 0.96 pounds
435.0 g / 4.3 N
|
Table 4: Material efficiency (saturation) - 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 pounds
87.0 g / 0.9 N
|
| 1 mm |
|
0.22 kg / 0.48 pounds
217.5 g / 2.1 N
|
| 2 mm |
|
0.44 kg / 0.96 pounds
435.0 g / 4.3 N
|
| 3 mm |
|
0.65 kg / 1.44 pounds
652.5 g / 6.4 N
|
| 5 mm |
|
0.87 kg / 1.92 pounds
870.0 g / 8.5 N
|
| 10 mm |
|
0.87 kg / 1.92 pounds
870.0 g / 8.5 N
|
| 11 mm |
|
0.87 kg / 1.92 pounds
870.0 g / 8.5 N
|
| 12 mm |
|
0.87 kg / 1.92 pounds
870.0 g / 8.5 N
|
Table 5: Working in heat (material behavior) - resistance threshold
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 pounds
870.0 g / 8.5 N
|
OK |
| 40 °C | -2.2% |
0.85 kg / 1.88 pounds
850.9 g / 8.3 N
|
OK |
| 60 °C | -4.4% |
0.83 kg / 1.83 pounds
831.7 g / 8.2 N
|
|
| 80 °C | -6.6% |
0.81 kg / 1.79 pounds
812.6 g / 8.0 N
|
|
| 100 °C | -28.8% |
0.62 kg / 1.37 pounds
619.4 g / 6.1 N
|
Table 6: Magnet-Magnet interaction (attraction) - field collision
MW 12x1.5 / N38
| Gap (mm) | Attraction (kg/lbs) (N-S) | Sliding Force (kg/lbs/g/N) | Repulsion (kg/lbs) (N-N) |
|---|---|---|---|
| 0 mm |
1.57 kg / 3.47 pounds
2 770 Gs
|
0.24 kg / 0.52 pounds
236 g / 2.3 N
|
N/A |
| 1 mm |
1.46 kg / 3.21 pounds
2 891 Gs
|
0.22 kg / 0.48 pounds
219 g / 2.1 N
|
1.31 kg / 2.89 pounds
~0 Gs
|
| 2 mm |
1.30 kg / 2.87 pounds
2 731 Gs
|
0.19 kg / 0.43 pounds
195 g / 1.9 N
|
1.17 kg / 2.58 pounds
~0 Gs
|
| 3 mm |
1.12 kg / 2.48 pounds
2 538 Gs
|
0.17 kg / 0.37 pounds
168 g / 1.7 N
|
1.01 kg / 2.23 pounds
~0 Gs
|
| 5 mm |
0.78 kg / 1.71 pounds
2 109 Gs
|
0.12 kg / 0.26 pounds
116 g / 1.1 N
|
0.70 kg / 1.54 pounds
~0 Gs
|
| 10 mm |
0.24 kg / 0.53 pounds
1 173 Gs
|
0.04 kg / 0.08 pounds
36 g / 0.4 N
|
0.22 kg / 0.48 pounds
~0 Gs
|
| 20 mm |
0.02 kg / 0.05 pounds
361 Gs
|
0.00 kg / 0.01 pounds
3 g / 0.0 N
|
0.02 kg / 0.05 pounds
~0 Gs
|
| 50 mm |
0.00 kg / 0.00 pounds
36 Gs
|
0.00 kg / 0.00 pounds
0 g / 0.0 N
|
0.00 kg / 0.00 pounds
~0 Gs
|
| 60 mm |
0.00 kg / 0.00 pounds
22 Gs
|
0.00 kg / 0.00 pounds
0 g / 0.0 N
|
0.00 kg / 0.00 pounds
~0 Gs
|
| 70 mm |
0.00 kg / 0.00 pounds
14 Gs
|
0.00 kg / 0.00 pounds
0 g / 0.0 N
|
0.00 kg / 0.00 pounds
~0 Gs
|
| 80 mm |
0.00 kg / 0.00 pounds
10 Gs
|
0.00 kg / 0.00 pounds
0 g / 0.0 N
|
0.00 kg / 0.00 pounds
~0 Gs
|
| 90 mm |
0.00 kg / 0.00 pounds
7 Gs
|
0.00 kg / 0.00 pounds
0 g / 0.0 N
|
0.00 kg / 0.00 pounds
~0 Gs
|
| 100 mm |
0.00 kg / 0.00 pounds
5 Gs
|
0.00 kg / 0.00 pounds
0 g / 0.0 N
|
0.00 kg / 0.00 pounds
~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 |
| Timepiece | 20 Gs (2.0 mT) | 2.5 cm |
| Phone / Smartphone | 40 Gs (4.0 mT) | 2.0 cm |
| Car key | 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: Impact energy (cracking risk) - collision effects
MW 12x1.5 / N38
| Start from (mm) | Speed (km/h) | Energy (J) | Predicted outcome |
|---|---|---|---|
| 10 mm |
22.59 km/h
(6.27 m/s)
|
0.02 J | |
| 30 mm |
22.74 km/h
(6.32 m/s)
|
0.03 J | |
| 50 mm |
22.74 km/h
(6.32 m/s)
|
0.03 J | |
| 100 mm |
22.74 km/h
(6.32 m/s)
|
0.03 J |
Table 9: Surface protection spec
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 (Flux)
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: Submerged application
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. Sliding resistance
*Note: On a vertical surface, the magnet holds merely approx. 20-30% of its nominal pull.
2. Efficiency vs thickness
*Thin metal sheet (e.g. computer case) drastically reduces the holding force.
3. Heat tolerance
*For N38 grade, the critical limit is 80°C.
4. Demagnetization curve and operating point (B-H)
chart generated for the permeance coefficient Pc (Permeance Coefficient) = 0.19
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.
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 proposals
Advantages and disadvantages of Nd2Fe14B magnets.
Strengths
- They retain full power for nearly 10 years – the drop is just ~1% (based on simulations),
- They are extremely resistant to demagnetization induced by external disturbances,
- In other words, due to the shiny layer of nickel, the element is aesthetically pleasing,
- Magnetic induction on the surface of the magnet is maximum,
- 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 freedom in designing and the capacity to modify to unusual requirements,
- Fundamental importance in electronics industry – they find application in computer drives, electric drive systems, medical equipment, and technologically advanced constructions.
- Compactness – despite small sizes they generate large force, making them ideal for precision applications
Limitations
- To avoid cracks under impact, we suggest using special steel housings. Such a solution secures the magnet and simultaneously increases its durability.
- Neodymium magnets lose their force 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 durability even at temperatures up to 230°C
- 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 producing nuts in the magnet and complicated forms - recommended is cover - magnetic holder.
- Health risk related to microscopic parts of magnets pose a threat, when accidentally swallowed, which gains importance in the context of child health protection. Additionally, small elements of these devices can be problematic in diagnostics medical in case of swallowing.
- With mass production the cost of neodymium magnets can be a barrier,
Pull force analysis
Detachment force of the magnet in optimal conditions – what contributes to it?
- on a plate made of structural steel, effectively closing the magnetic flux
- with a cross-section minimum 10 mm
- with a plane free of scratches
- with total lack of distance (without coatings)
- under vertical application of breakaway force (90-degree angle)
- in stable room temperature
Determinants of practical lifting force of a magnet
- Space between magnet and steel – even a fraction of a millimeter of distance (caused e.g. by varnish or unevenness) 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 maximum value.
- Metal thickness – thin material does not allow full use of the magnet. Part of the magnetic field passes through the material instead of converting into lifting capacity.
- Steel grade – ideal substrate is pure iron steel. Hardened steels may attract less.
- Surface quality – the more even the plate, the larger the contact zone and stronger the hold. Unevenness acts like micro-gaps.
- Thermal environment – heating the magnet causes a temporary drop of force. Check the thermal limit for a given model.
Lifting capacity was determined with the use of a steel plate with a smooth surface of optimal thickness (min. 20 mm), under perpendicular detachment force, in contrast under shearing force the load capacity is reduced by as much as 5 times. Additionally, even a small distance between the magnet and the plate reduces the load capacity.
Warnings
Finger safety
Risk of injury: The attraction force is so great that it can result in hematomas, crushing, and even bone fractures. Protective gloves are recommended.
Medical implants
Life threat: Strong magnets can deactivate heart devices and defibrillators. Do not approach if you have electronic implants.
Fire warning
Machining of neodymium magnets carries a risk of fire risk. Magnetic powder oxidizes rapidly with oxygen and is difficult to extinguish.
Impact on smartphones
An intense magnetic field interferes with the operation of magnetometers in smartphones and GPS navigation. Keep magnets near a device to prevent breaking the sensors.
Keep away from computers
Device Safety: Neodymium magnets can ruin payment cards and delicate electronics (heart implants, hearing aids, timepieces).
Maximum temperature
Do not overheat. Neodymium magnets are susceptible to heat. If you need operation above 80°C, inquire about special high-temperature series (H, SH, UH).
Immense force
Be careful. Rare earth magnets attract from a long distance and snap with massive power, often quicker than you can react.
Avoid contact if allergic
Studies show that nickel (standard magnet coating) is a strong allergen. For allergy sufferers, avoid direct skin contact and opt for encased magnets.
Magnets are brittle
Neodymium magnets are ceramic materials, which means they are prone to chipping. Clashing of two magnets will cause them breaking into shards.
Product not for children
Only for adults. Small elements pose a choking risk, causing severe trauma. Store out of reach of kids and pets.
