MW 14x3 / N38 - cylindrical magnet
cylindrical magnet
Catalog no 010025
GTIN/EAN: 5906301810247
Diameter Ø
14 mm [±0,1 mm]
Height
3 mm [±0,1 mm]
Weight
3.46 g
Magnetization Direction
↑ axial
Load capacity
2.76 kg / 27.06 N
Magnetic Induction
244.11 mT / 2441 Gs
Coating
[NiCuNi] Nickel
1.845 ZŁ with VAT / pcs + price for transport
1.500 ZŁ net + 23% VAT / pcs
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Physical properties - MW 14x3 / N38 - cylindrical magnet
Specification / characteristics - MW 14x3 / N38 - cylindrical magnet
| properties | values |
|---|---|
| Cat. no. | 010025 |
| GTIN/EAN | 5906301810247 |
| Production/Distribution | Dhit sp. z o.o. |
| Country of origin | Poland / China / Germany |
| Customs code | 85059029 |
| Diameter Ø | 14 mm [±0,1 mm] |
| Height | 3 mm [±0,1 mm] |
| Weight | 3.46 g |
| Magnetization Direction | ↑ axial |
| Load capacity ~ ? | 2.76 kg / 27.06 N |
| Magnetic Induction ~ ? | 244.11 mT / 2441 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 magnet - technical parameters
The following data represent the result of a mathematical simulation. Results are based on algorithms for the class Nd2Fe14B. Real-world conditions may deviate from the simulation results. Treat these data as a supplementary guide for designers.
Table 1: Static pull force (force vs distance) - characteristics
MW 14x3 / N38
| Distance (mm) | Induction (Gauss) / mT | Pull Force (kg/lbs/g/N) | Risk Status |
|---|---|---|---|
| 0 mm |
2440 Gs
244.0 mT
|
2.76 kg / 6.08 pounds
2760.0 g / 27.1 N
|
medium risk |
| 1 mm |
2199 Gs
219.9 mT
|
2.24 kg / 4.94 pounds
2241.6 g / 22.0 N
|
medium risk |
| 2 mm |
1900 Gs
190.0 mT
|
1.67 kg / 3.69 pounds
1673.8 g / 16.4 N
|
safe |
| 3 mm |
1593 Gs
159.3 mT
|
1.18 kg / 2.59 pounds
1175.5 g / 11.5 N
|
safe |
| 5 mm |
1062 Gs
106.2 mT
|
0.52 kg / 1.15 pounds
523.0 g / 5.1 N
|
safe |
| 10 mm |
380 Gs
38.0 mT
|
0.07 kg / 0.15 pounds
66.8 g / 0.7 N
|
safe |
| 15 mm |
160 Gs
16.0 mT
|
0.01 kg / 0.03 pounds
11.9 g / 0.1 N
|
safe |
| 20 mm |
79 Gs
7.9 mT
|
0.00 kg / 0.01 pounds
2.9 g / 0.0 N
|
safe |
| 30 mm |
27 Gs
2.7 mT
|
0.00 kg / 0.00 pounds
0.3 g / 0.0 N
|
safe |
| 50 mm |
7 Gs
0.7 mT
|
0.00 kg / 0.00 pounds
0.0 g / 0.0 N
|
safe |
Table 2: Sliding load (vertical surface)
MW 14x3 / N38
| Distance (mm) | Friction coefficient | Pull Force (kg/lbs/g/N) |
|---|---|---|
| 0 mm | Stal (~0.2) |
0.55 kg / 1.22 pounds
552.0 g / 5.4 N
|
| 1 mm | Stal (~0.2) |
0.45 kg / 0.99 pounds
448.0 g / 4.4 N
|
| 2 mm | Stal (~0.2) |
0.33 kg / 0.74 pounds
334.0 g / 3.3 N
|
| 3 mm | Stal (~0.2) |
0.24 kg / 0.52 pounds
236.0 g / 2.3 N
|
| 5 mm | Stal (~0.2) |
0.10 kg / 0.23 pounds
104.0 g / 1.0 N
|
| 10 mm | Stal (~0.2) |
0.01 kg / 0.03 pounds
14.0 g / 0.1 N
|
| 15 mm | Stal (~0.2) |
0.00 kg / 0.00 pounds
2.0 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 (sliding) - behavior on slippery surfaces
MW 14x3 / N38
| Surface type | Friction coefficient / % Mocy | Max load (kg/lbs/g/N) |
|---|---|---|
| Raw steel |
µ = 0.3
30% Nominalnej Siły
|
0.83 kg / 1.83 pounds
828.0 g / 8.1 N
|
| Painted steel (standard) |
µ = 0.2
20% Nominalnej Siły
|
0.55 kg / 1.22 pounds
552.0 g / 5.4 N
|
| Oily/slippery steel |
µ = 0.1
10% Nominalnej Siły
|
0.28 kg / 0.61 pounds
276.0 g / 2.7 N
|
| Magnet with anti-slip rubber |
µ = 0.5
50% Nominalnej Siły
|
1.38 kg / 3.04 pounds
1380.0 g / 13.5 N
|
Table 4: Material efficiency (substrate influence) - power losses
MW 14x3 / N38
| Steel thickness (mm) | % power | Real pull force (kg/lbs/g/N) |
|---|---|---|
| 0.5 mm |
|
0.28 kg / 0.61 pounds
276.0 g / 2.7 N
|
| 1 mm |
|
0.69 kg / 1.52 pounds
690.0 g / 6.8 N
|
| 2 mm |
|
1.38 kg / 3.04 pounds
1380.0 g / 13.5 N
|
| 3 mm |
|
2.07 kg / 4.56 pounds
2070.0 g / 20.3 N
|
| 5 mm |
|
2.76 kg / 6.08 pounds
2760.0 g / 27.1 N
|
| 10 mm |
|
2.76 kg / 6.08 pounds
2760.0 g / 27.1 N
|
| 11 mm |
|
2.76 kg / 6.08 pounds
2760.0 g / 27.1 N
|
| 12 mm |
|
2.76 kg / 6.08 pounds
2760.0 g / 27.1 N
|
Table 5: Thermal stability (material behavior) - power drop
MW 14x3 / N38
| Ambient temp. (°C) | Power loss | Remaining pull (kg/lbs/g/N) | Status |
|---|---|---|---|
| 20 °C | 0.0% |
2.76 kg / 6.08 pounds
2760.0 g / 27.1 N
|
OK |
| 40 °C | -2.2% |
2.70 kg / 5.95 pounds
2699.3 g / 26.5 N
|
OK |
| 60 °C | -4.4% |
2.64 kg / 5.82 pounds
2638.6 g / 25.9 N
|
|
| 80 °C | -6.6% |
2.58 kg / 5.68 pounds
2577.8 g / 25.3 N
|
|
| 100 °C | -28.8% |
1.97 kg / 4.33 pounds
1965.1 g / 19.3 N
|
Table 6: Magnet-Magnet interaction (attraction) - forces in the system
MW 14x3 / N38
| Gap (mm) | Attraction (kg/lbs) (N-S) | Shear Force (kg/lbs/g/N) | Repulsion (kg/lbs) (N-N) |
|---|---|---|---|
| 0 mm |
5.65 kg / 12.46 pounds
4 030 Gs
|
0.85 kg / 1.87 pounds
848 g / 8.3 N
|
N/A |
| 1 mm |
5.16 kg / 11.37 pounds
4 662 Gs
|
0.77 kg / 1.71 pounds
773 g / 7.6 N
|
4.64 kg / 10.23 pounds
~0 Gs
|
| 2 mm |
4.59 kg / 10.12 pounds
4 398 Gs
|
0.69 kg / 1.52 pounds
689 g / 6.8 N
|
4.13 kg / 9.11 pounds
~0 Gs
|
| 3 mm |
4.00 kg / 8.82 pounds
4 107 Gs
|
0.60 kg / 1.32 pounds
600 g / 5.9 N
|
3.60 kg / 7.94 pounds
~0 Gs
|
| 5 mm |
2.89 kg / 6.37 pounds
3 490 Gs
|
0.43 kg / 0.96 pounds
434 g / 4.3 N
|
2.60 kg / 5.74 pounds
~0 Gs
|
| 10 mm |
1.07 kg / 2.36 pounds
2 125 Gs
|
0.16 kg / 0.35 pounds
161 g / 1.6 N
|
0.96 kg / 2.12 pounds
~0 Gs
|
| 20 mm |
0.14 kg / 0.30 pounds
759 Gs
|
0.02 kg / 0.05 pounds
21 g / 0.2 N
|
0.12 kg / 0.27 pounds
~0 Gs
|
| 50 mm |
0.00 kg / 0.00 pounds
89 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
54 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
36 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
25 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
18 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
13 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) - warnings
MW 14x3 / N38
| Object / Device | Limit (Gauss) / mT | Safe distance |
|---|---|---|
| Pacemaker | 5 Gs (0.5 mT) | 5.5 cm |
| Hearing aid | 10 Gs (1.0 mT) | 4.5 cm |
| Mechanical watch | 20 Gs (2.0 mT) | 3.5 cm |
| Phone / Smartphone | 40 Gs (4.0 mT) | 3.0 cm |
| Car key | 50 Gs (5.0 mT) | 2.5 cm |
| Payment card | 400 Gs (40.0 mT) | 1.0 cm |
| HDD hard drive | 600 Gs (60.0 mT) | 1.0 cm |
Table 8: Dynamics (kinetic energy) - collision effects
MW 14x3 / N38
| Start from (mm) | Speed (km/h) | Energy (J) | Predicted outcome |
|---|---|---|---|
| 10 mm |
28.91 km/h
(8.03 m/s)
|
0.11 J | |
| 30 mm |
49.34 km/h
(13.71 m/s)
|
0.32 J | |
| 50 mm |
63.69 km/h
(17.69 m/s)
|
0.54 J | |
| 100 mm |
90.07 km/h
(25.02 m/s)
|
1.08 J |
Table 9: Corrosion resistance
MW 14x3 / 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 14x3 / N38
| Parameter | Value | SI Unit / Description |
|---|---|---|
| Magnetic Flux | 4 301 Mx | 43.0 µWb |
| Pc Coefficient | 0.31 | Low (Flat) |
Table 11: Submerged application
MW 14x3 / N38
| Environment | Effective steel pull | Effect |
|---|---|---|
| Air (land) | 2.76 kg | Standard |
| Water (riverbed) |
3.16 kg
(+0.40 kg buoyancy gain)
|
+14.5% |
1. Vertical hold
*Note: On a vertical wall, the magnet retains merely approx. 20-30% of its nominal pull.
2. Plate thickness effect
*Thin metal sheet (e.g. computer case) drastically limits the holding force.
3. Power loss vs temp
*For standard magnets, the max working temp is 80°C.
4. Demagnetization curve and operating point (B-H)
chart generated for the permeance coefficient Pc (Permeance Coefficient) = 0.31
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% |
Environmental data
| recyclability (EoL) | 100% |
| recycled raw materials | ~10% (pre-cons) |
| carbon footprint | low / zredukowany |
| waste code (EWC) | 16 02 16 |
Other proposals
Pros and cons of Nd2Fe14B magnets.
Advantages
- They do not lose magnetism, even after approximately 10 years – the reduction in lifting capacity is only ~1% (based on measurements),
- They are extremely resistant to demagnetization induced by presence of other magnetic fields,
- A magnet with a smooth silver surface is more attractive,
- Magnets exhibit very high magnetic induction on the working surface,
- 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 freedom in constructing and the capacity to modify to client solutions,
- Key role in electronics industry – they are utilized in HDD drives, electromotive mechanisms, diagnostic systems, also other advanced devices.
- Relatively small size with high pulling force – neodymium magnets offer high power in small dimensions, which allows their use in small systems
Weaknesses
- At strong impacts they can break, therefore we recommend placing them in special holders. A metal housing provides additional protection against damage and increases the magnet's durability.
- NdFeB magnets lose strength when exposed to high temperatures. After reaching 80°C, many of them experience permanent weakening of power (a factor is the shape as well as dimensions of the magnet). We offer magnets specially adapted to work at temperatures up to 230°C marked [AH], which are extremely resistant to heat
- Due to the susceptibility of magnets to corrosion in a humid environment, we advise using waterproof magnets made of rubber, plastic or other material immune to moisture, in case of application outdoors
- We suggest a housing - magnetic mount, due to difficulties in creating threads inside the magnet and complex forms.
- Potential hazard resulting from small fragments of magnets can be dangerous, in case of ingestion, which gains importance in the context of child safety. Additionally, tiny parts of these products can complicate diagnosis medical after entering the body.
- Due to neodymium price, their price is relatively high,
Pull force analysis
Optimal lifting capacity of a neodymium magnet – what contributes to it?
- using a sheet made of high-permeability steel, serving as a circuit closing element
- whose transverse dimension reaches at least 10 mm
- with an ground contact surface
- without any air gap between the magnet and steel
- under vertical application of breakaway force (90-degree angle)
- at temperature approx. 20 degrees Celsius
Practical lifting capacity: influencing factors
- Distance (betwixt the magnet and the metal), as even a microscopic distance (e.g. 0.5 mm) can cause a reduction in force by up to 50% (this also applies to varnish, rust or dirt).
- Pull-off angle – 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 – too thin sheet does not accept the full field, causing part of the flux to be wasted into the air.
- Plate material – low-carbon steel gives the best results. Alloy steels decrease magnetic properties and holding force.
- Surface finish – full contact is obtained only on polished steel. Rough texture create air cushions, reducing force.
- Operating temperature – neodymium magnets have a sensitivity to temperature. At higher temperatures they are weaker, and at low temperatures they can be stronger (up to a certain limit).
Lifting capacity was assessed by applying a polished steel plate of suitable thickness (min. 20 mm), under vertically applied force, whereas under attempts to slide the magnet the lifting capacity is smaller. Moreover, even a slight gap between the magnet’s surface and the plate lowers the load capacity.
Safety rules for work with neodymium magnets
Respect the power
Handle magnets consciously. Their huge power can surprise even experienced users. Plan your moves and do not underestimate their force.
Warning for heart patients
Health Alert: Neodymium magnets can deactivate heart devices and defibrillators. Stay away if you have electronic implants.
Safe distance
Equipment safety: Neodymium magnets can damage data carriers and sensitive devices (pacemakers, hearing aids, mechanical watches).
Do not overheat magnets
Do not overheat. Neodymium magnets are susceptible to heat. If you require operation above 80°C, ask us about special high-temperature series (H, SH, UH).
This is not a toy
Absolutely store magnets away from children. Choking hazard is significant, and the effects of magnets clamping inside the body are tragic.
Allergic reactions
A percentage of the population experience a sensitization to Ni, which is the common plating for NdFeB magnets. Extended handling might lead to dermatitis. We recommend wear safety gloves.
Risk of cracking
Protect your eyes. Magnets can explode upon violent connection, ejecting shards into the air. Eye protection is mandatory.
Combustion hazard
Mechanical processing of neodymium magnets poses a fire risk. Magnetic powder reacts violently with oxygen and is hard to extinguish.
Crushing risk
Danger of trauma: The attraction force is so great that it can cause blood blisters, crushing, and broken bones. Use thick gloves.
GPS and phone interference
Note: rare earth magnets generate a field that confuses precision electronics. Keep a separation from your mobile, device, and GPS.
