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 |
Engineering simulation of the product - report
These values constitute the outcome of a mathematical analysis. Values rely on algorithms for the class Nd2Fe14B. Operational parameters may differ. Please consider these calculations as a supplementary guide during assembly planning.
Table 1: Static 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 lbs
870.0 g / 8.5 N
|
safe |
| 1 mm |
1365 Gs
136.5 mT
|
0.72 kg / 1.58 lbs
718.1 g / 7.0 N
|
safe |
| 2 mm |
1163 Gs
116.3 mT
|
0.52 kg / 1.15 lbs
521.4 g / 5.1 N
|
safe |
| 3 mm |
947 Gs
94.7 mT
|
0.35 kg / 0.76 lbs
345.7 g / 3.4 N
|
safe |
| 5 mm |
587 Gs
58.7 mT
|
0.13 kg / 0.29 lbs
132.6 g / 1.3 N
|
safe |
| 10 mm |
180 Gs
18.0 mT
|
0.01 kg / 0.03 lbs
12.5 g / 0.1 N
|
safe |
| 15 mm |
70 Gs
7.0 mT
|
0.00 kg / 0.00 lbs
1.9 g / 0.0 N
|
safe |
| 20 mm |
33 Gs
3.3 mT
|
0.00 kg / 0.00 lbs
0.4 g / 0.0 N
|
safe |
| 30 mm |
11 Gs
1.1 mT
|
0.00 kg / 0.00 lbs
0.0 g / 0.0 N
|
safe |
| 50 mm |
3 Gs
0.3 mT
|
0.00 kg / 0.00 lbs
0.0 g / 0.0 N
|
safe |
Table 2: Shear load (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 (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 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: 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 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 (stability) - 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 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 collision
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: Safety (HSE) (electronics) - warnings
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 |
| Mobile device | 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: Collisions (cracking risk) - 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 (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: Physics of underwater searching
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. Shear force
*Caution: On a vertical surface, the magnet holds just approx. 20-30% of its max power.
2. Steel saturation
*Thin metal sheet (e.g. computer case) severely weakens the holding force.
3. Temperature resistance
*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) = 0.19
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.
Material specification
| 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 |
View also offers
Pros as well as cons of rare earth magnets.
Pros
- They virtually do not lose strength, because even after 10 years the performance loss is only ~1% (based on calculations),
- Magnets very well protect themselves against loss of magnetization caused by foreign field sources,
- By covering with a decorative coating of nickel, the element acquires an professional look,
- They show high magnetic induction at the operating surface, which increases their power,
- Neodymium magnets are characterized by extremely high magnetic induction on the magnet surface and can work (depending on the shape) even at a temperature of 230°C or more...
- Possibility of detailed modeling as well as adapting to concrete requirements,
- Huge importance in modern industrial fields – they serve a role in data components, electric drive systems, precision medical tools, and other advanced devices.
- Compactness – despite small sizes they offer powerful magnetic field, making them ideal for precision applications
Cons
- Brittleness is one of their disadvantages. Upon intense impact they can fracture. We recommend 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 durability even at temperatures up to 230°C
- They rust in a humid environment. For use outdoors we suggest using waterproof magnets e.g. in rubber, plastic
- Limited possibility of producing nuts in the magnet and complex forms - preferred is a housing - magnetic holder.
- Potential hazard resulting from small fragments of magnets can be dangerous, in case of ingestion, which is particularly important in the context of child safety. It is also worth noting that small components of these devices can complicate diagnosis medical in case of swallowing.
- Due to complex production process, their price is relatively high,
Holding force characteristics
Maximum lifting capacity of the magnet – what affects it?
- with the contact of a yoke made of special test steel, guaranteeing full magnetic saturation
- whose thickness reaches at least 10 mm
- with an polished touching surface
- without the slightest air gap between the magnet and steel
- under perpendicular application of breakaway force (90-degree angle)
- in stable room temperature
Key elements affecting lifting force
- Gap between surfaces – even a fraction of a millimeter of separation (caused e.g. by veneer or unevenness) drastically reduces the magnet efficiency, often by half at just 0.5 mm.
- Direction of force – maximum parameter is reached only during perpendicular pulling. The shear force of the magnet along the surface is standardly many times smaller (approx. 1/5 of the lifting capacity).
- Element thickness – to utilize 100% power, the steel must be adequately massive. Thin sheet limits the lifting capacity (the magnet "punches through" it).
- Material composition – not every steel attracts identically. High carbon content weaken the interaction with the magnet.
- Surface finish – ideal contact is possible only on polished steel. Any scratches and bumps create air cushions, reducing force.
- Temperature – heating the magnet causes a temporary drop of induction. Check the maximum operating temperature for a given model.
Lifting capacity was assessed using a steel plate with a smooth surface of optimal thickness (min. 20 mm), under perpendicular detachment force, in contrast under shearing force the lifting capacity is smaller. Additionally, even a small distance between the magnet and the plate decreases the load capacity.
Safety rules for work with neodymium magnets
Warning for allergy sufferers
Some people experience a contact allergy to nickel, which is the typical protective layer for NdFeB magnets. Prolonged contact might lead to an allergic reaction. We recommend wear safety gloves.
Dust explosion hazard
Powder produced during machining of magnets is flammable. Avoid drilling into magnets unless you are an expert.
Adults only
Product intended for adults. Tiny parts can be swallowed, leading to intestinal necrosis. Keep out of reach of children and animals.
Magnetic interference
An intense magnetic field interferes with the operation of magnetometers in phones and navigation systems. Do not bring magnets near a device to avoid breaking the sensors.
Magnets are brittle
Beware of splinters. Magnets can explode upon uncontrolled impact, ejecting sharp fragments into the air. Wear goggles.
Medical interference
Individuals with a pacemaker have to keep an large gap from magnets. The magnetism can disrupt the functioning of the life-saving device.
Electronic hazard
Powerful magnetic fields can corrupt files on credit cards, HDDs, and storage devices. Keep a distance of at least 10 cm.
Handling guide
Before starting, read the rules. Sudden snapping can destroy the magnet or hurt your hand. Be predictive.
Power loss in heat
Monitor thermal conditions. Exposing the magnet above 80 degrees Celsius will ruin its properties and pulling force.
Bodily injuries
Danger of trauma: The attraction force is so great that it can cause hematomas, pinching, and broken bones. Protective gloves are recommended.
