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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Technical data of the product - 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 |
Engineering analysis of the assembly - report
The following data are the outcome of a mathematical calculation. Results rely on algorithms for the class Nd2Fe14B. Operational parameters may differ from theoretical values. Treat these calculations as a reference point when designing systems.
Table 1: Static force (force vs distance) - interaction chart
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
|
warning |
| 1 mm |
2199 Gs
219.9 mT
|
2.24 kg / 4.94 pounds
2241.6 g / 22.0 N
|
warning |
| 2 mm |
1900 Gs
190.0 mT
|
1.67 kg / 3.69 pounds
1673.8 g / 16.4 N
|
low risk |
| 3 mm |
1593 Gs
159.3 mT
|
1.18 kg / 2.59 pounds
1175.5 g / 11.5 N
|
low risk |
| 5 mm |
1062 Gs
106.2 mT
|
0.52 kg / 1.15 pounds
523.0 g / 5.1 N
|
low risk |
| 10 mm |
380 Gs
38.0 mT
|
0.07 kg / 0.15 pounds
66.8 g / 0.7 N
|
low risk |
| 15 mm |
160 Gs
16.0 mT
|
0.01 kg / 0.03 pounds
11.9 g / 0.1 N
|
low risk |
| 20 mm |
79 Gs
7.9 mT
|
0.00 kg / 0.01 pounds
2.9 g / 0.0 N
|
low risk |
| 30 mm |
27 Gs
2.7 mT
|
0.00 kg / 0.00 pounds
0.3 g / 0.0 N
|
low risk |
| 50 mm |
7 Gs
0.7 mT
|
0.00 kg / 0.00 pounds
0.0 g / 0.0 N
|
low risk |
Table 2: Sliding hold (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: Wall mounting (shearing) - 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: Steel thickness (saturation) - 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 resistance (stability) - thermal limit
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 (repulsion) - field range
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: Safety (HSE) (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 |
| Mobile device | 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: Collisions (cracking risk) - 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: Coating parameters (durability)
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 (Flux)
MW 14x3 / N38
| Parameter | Value | SI Unit / Description |
|---|---|---|
| Magnetic Flux | 4 301 Mx | 43.0 µWb |
| Pc Coefficient | 0.31 | Low (Flat) |
Table 11: Underwater work (magnet fishing)
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
*Caution: On a vertical wall, the magnet holds only a fraction of its nominal pull.
2. Steel thickness impact
*Thin metal sheet (e.g. 0.5mm PC case) severely weakens 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
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% |
Sustainability
| recyclability (EoL) | 100% |
| recycled raw materials | ~10% (pre-cons) |
| carbon footprint | low / zredukowany |
| waste code (EWC) | 16 02 16 |
Other proposals
Advantages as well as disadvantages of Nd2Fe14B magnets.
Advantages
- They do not lose power, even during nearly 10 years – the reduction in power is only ~1% (based on measurements),
- They retain their magnetic properties even under strong external field,
- By using a reflective layer of silver, the element presents an proper look,
- Neodymium magnets generate maximum magnetic induction on a contact point, which increases force concentration,
- Due to their durability and thermal resistance, neodymium magnets are capable of operate (depending on the form) even at high temperatures reaching 230°C or more...
- Possibility of detailed shaping and optimizing to specific needs,
- Universal use in innovative solutions – they are used in computer drives, drive modules, medical devices, also complex engineering applications.
- Compactness – despite small sizes they generate large force, making them ideal for precision applications
Cons
- Susceptibility to cracking is one of their disadvantages. Upon intense impact they can fracture. We recommend keeping them in a steel housing, which not only protects them against impacts but also increases their durability
- When exposed to high temperature, neodymium magnets experience a drop in force. Often, when the temperature exceeds 80°C, their power 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
- Due to the susceptibility of magnets to corrosion in a humid environment, we recommend using waterproof magnets made of rubber, plastic or other material stable to moisture, when using outdoors
- Limited possibility of producing threads in the magnet and complicated forms - preferred is a housing - magnet mounting.
- Health risk to health – tiny shards of magnets pose a threat, if swallowed, which gains importance in the aspect of protecting the youngest. It is also worth noting that small components of these devices are able to complicate diagnosis medical after entering the body.
- Higher cost of purchase is one of the disadvantages compared to ceramic magnets, especially in budget applications
Holding force characteristics
Maximum magnetic pulling force – what it depends on?
- with the contact of a yoke made of low-carbon steel, ensuring full magnetic saturation
- with a cross-section minimum 10 mm
- characterized by smoothness
- without any clearance between the magnet and steel
- for force acting at a right angle (pull-off, not shear)
- in neutral thermal conditions
Lifting capacity in real conditions – factors
- Gap between surfaces – every millimeter of distance (caused e.g. by veneer or unevenness) drastically reduces the magnet efficiency, often by half at just 0.5 mm.
- Pull-off angle – note that the magnet has greatest strength perpendicularly. Under shear forces, the holding force drops significantly, often to levels of 20-30% of the nominal value.
- Element thickness – to utilize 100% power, the steel must be adequately massive. Paper-thin metal limits the attraction force (the magnet "punches through" it).
- Material type – ideal substrate is pure iron steel. Stainless steels may generate lower lifting capacity.
- Surface condition – smooth surfaces ensure maximum contact, which increases force. Uneven metal reduce efficiency.
- Temperature – heating the magnet causes a temporary drop of induction. It is worth remembering the maximum operating temperature for a given model.
Lifting capacity was assessed by applying 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 75%. In addition, even a minimal clearance between the magnet and the plate lowers the holding force.
Safe handling of neodymium magnets
Medical implants
People with a heart stimulator should maintain an safe separation from magnets. The magnetic field can stop the operation of the life-saving device.
Conscious usage
Use magnets with awareness. Their huge power can shock even professionals. Plan your moves and do not underestimate their power.
Do not overheat magnets
Regular neodymium magnets (N-type) lose magnetization when the temperature exceeds 80°C. This process is irreversible.
Adults only
Strictly keep magnets away from children. Ingestion danger is significant, and the effects of magnets connecting inside the body are fatal.
Bodily injuries
Mind your fingers. Two large magnets will snap together instantly with a force of several hundred kilograms, destroying anything in their path. Exercise extreme caution!
Shattering risk
Beware of splinters. Magnets can explode upon violent connection, launching shards into the air. We recommend safety glasses.
Dust explosion hazard
Machining of NdFeB material carries a risk of fire risk. Magnetic powder reacts violently with oxygen and is difficult to extinguish.
Safe distance
Data protection: Strong magnets can ruin data carriers and sensitive devices (heart implants, hearing aids, timepieces).
Magnetic interference
GPS units and smartphones are highly susceptible to magnetic fields. Close proximity with a strong magnet can permanently damage the sensors in your phone.
Metal Allergy
Medical facts indicate that nickel (standard magnet coating) is a common allergen. If your skin reacts to metals, avoid direct skin contact or choose encased magnets.
