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
bulk discounts:
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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 |
Physical modeling of the assembly - data
These data are the direct effect of a engineering simulation. Results are based on models for the class Nd2Fe14B. Operational conditions may deviate from the simulation results. Please consider these calculations as a preliminary roadmap for designers.
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 pounds
870.0 g / 8.5 N
|
weak grip |
| 1 mm |
1365 Gs
136.5 mT
|
0.72 kg / 1.58 pounds
718.1 g / 7.0 N
|
weak grip |
| 2 mm |
1163 Gs
116.3 mT
|
0.52 kg / 1.15 pounds
521.4 g / 5.1 N
|
weak grip |
| 3 mm |
947 Gs
94.7 mT
|
0.35 kg / 0.76 pounds
345.7 g / 3.4 N
|
weak grip |
| 5 mm |
587 Gs
58.7 mT
|
0.13 kg / 0.29 pounds
132.6 g / 1.3 N
|
weak grip |
| 10 mm |
180 Gs
18.0 mT
|
0.01 kg / 0.03 pounds
12.5 g / 0.1 N
|
weak grip |
| 15 mm |
70 Gs
7.0 mT
|
0.00 kg / 0.00 pounds
1.9 g / 0.0 N
|
weak grip |
| 20 mm |
33 Gs
3.3 mT
|
0.00 kg / 0.00 pounds
0.4 g / 0.0 N
|
weak grip |
| 30 mm |
11 Gs
1.1 mT
|
0.00 kg / 0.00 pounds
0.0 g / 0.0 N
|
weak grip |
| 50 mm |
3 Gs
0.3 mT
|
0.00 kg / 0.00 pounds
0.0 g / 0.0 N
|
weak grip |
Table 2: Sliding capacity (vertical surface)
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: Vertical assembly (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: Steel thickness (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 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: Two magnets (repulsion) - field range
MW 12x1.5 / N38
| Gap (mm) | Attraction (kg/lbs) (N-S) | Shear Strength (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 (electronics) - 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: Impact energy (kinetic energy) - collision effects
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: Anti-corrosion coating durability
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: Construction 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. Wall mount (shear)
*Warning: On a vertical surface, the magnet holds only ~20% of its perpendicular strength.
2. Plate thickness effect
*Thin metal sheet (e.g. computer case) significantly limits the holding force.
3. Thermal stability
*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 offers
Pros as well as cons of Nd2Fe14B magnets.
Benefits
- They virtually do not lose power, because even after ten years the performance loss is only ~1% (based on calculations),
- Magnets very well defend themselves against demagnetization caused by foreign field sources,
- By using a smooth layer of nickel, the element gains an elegant look,
- Neodymium magnets generate maximum magnetic induction on a small surface, which ensures high operational effectiveness,
- Thanks to resistance to high temperature, they are able to function (depending on the form) even at temperatures up to 230°C and higher...
- Thanks to versatility in shaping and the capacity to customize to individual projects,
- Universal use in high-tech industry – they are commonly used in computer drives, motor assemblies, medical equipment, also industrial machines.
- Compactness – despite small sizes they generate large force, making them ideal for precision applications
Limitations
- To avoid cracks upon strong impacts, we suggest using special steel holders. 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 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
- Due to limitations in realizing nuts and complicated shapes in magnets, we recommend using a housing - magnetic mechanism.
- Possible danger related to microscopic parts of magnets can be dangerous, in case of ingestion, which becomes key in the context of child safety. Furthermore, small components of these products can disrupt the diagnostic process medical after entering the body.
- Due to expensive raw materials, their price is relatively high,
Lifting parameters
Optimal lifting capacity of a neodymium magnet – what contributes to it?
- with the use of a yoke made of special test steel, guaranteeing full magnetic saturation
- possessing a thickness of at least 10 mm to avoid saturation
- with an polished contact surface
- under conditions of gap-free contact (metal-to-metal)
- under axial force vector (90-degree angle)
- in temp. approx. 20°C
Practical lifting capacity: influencing factors
- Distance – the presence of foreign body (rust, tape, gap) interrupts the magnetic circuit, which reduces capacity steeply (even by 50% at 0.5 mm).
- Pull-off angle – remember that the magnet has greatest strength perpendicularly. Under shear forces, the capacity drops significantly, often to levels of 20-30% of the nominal value.
- Substrate thickness – to utilize 100% power, the steel must be sufficiently thick. Paper-thin metal restricts the attraction force (the magnet "punches through" it).
- Steel type – low-carbon steel gives the best results. Higher carbon content decrease magnetic permeability and holding force.
- Surface finish – full contact is obtained only on smooth steel. Rough texture create air cushions, reducing force.
- Thermal conditions – NdFeB sinters have a negative temperature coefficient. When it is hot they are weaker, and in frost gain strength (up to a certain limit).
Lifting capacity testing was carried out on a smooth plate of optimal thickness, under perpendicular forces, in contrast under attempts to slide the magnet the lifting capacity is smaller. Additionally, even a slight gap between the magnet’s surface and the plate lowers the lifting capacity.
Warnings
Warning for heart patients
For implant holders: Strong magnetic fields disrupt medical devices. Keep at least 30 cm distance or request help to work with the magnets.
Data carriers
Avoid bringing magnets near a purse, laptop, or screen. The magnetism can destroy these devices and erase data from cards.
Immense force
Handle magnets consciously. Their powerful strength can shock even professionals. Be vigilant and do not underestimate their force.
GPS and phone interference
Remember: rare earth magnets generate a field that disrupts sensitive sensors. Maintain a safe distance from your phone, tablet, and GPS.
Bodily injuries
Danger of trauma: The pulling power is so immense that it can result in blood blisters, crushing, and even bone fractures. Use thick gloves.
Allergy Warning
It is widely known that nickel (standard magnet coating) is a potent allergen. If you have an allergy, avoid direct skin contact or select coated magnets.
Permanent damage
Regular neodymium magnets (grade N) lose magnetization when the temperature surpasses 80°C. The loss of strength is permanent.
Fire risk
Drilling and cutting of NdFeB material poses a fire risk. Neodymium dust reacts violently with oxygen and is hard to extinguish.
Shattering risk
Despite metallic appearance, neodymium is delicate and not impact-resistant. Avoid impacts, as the magnet may crumble into hazardous fragments.
Product not for children
Neodymium magnets are not toys. Swallowing several magnets may result in them connecting inside the digestive tract, which constitutes a direct threat to life and requires urgent medical intervention.
