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
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Detailed specification - 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 simulation of the magnet - report
Presented values constitute the direct effect of a physical simulation. Values are based on algorithms for the material Nd2Fe14B. Real-world conditions may differ from theoretical values. Please consider these data as a preliminary roadmap for designers.
Table 1: Static pull force (force vs gap) - 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 LBS
2760.0 g / 27.1 N
|
warning |
| 1 mm |
2199 Gs
219.9 mT
|
2.24 kg / 4.94 LBS
2241.6 g / 22.0 N
|
warning |
| 2 mm |
1900 Gs
190.0 mT
|
1.67 kg / 3.69 LBS
1673.8 g / 16.4 N
|
safe |
| 3 mm |
1593 Gs
159.3 mT
|
1.18 kg / 2.59 LBS
1175.5 g / 11.5 N
|
safe |
| 5 mm |
1062 Gs
106.2 mT
|
0.52 kg / 1.15 LBS
523.0 g / 5.1 N
|
safe |
| 10 mm |
380 Gs
38.0 mT
|
0.07 kg / 0.15 LBS
66.8 g / 0.7 N
|
safe |
| 15 mm |
160 Gs
16.0 mT
|
0.01 kg / 0.03 LBS
11.9 g / 0.1 N
|
safe |
| 20 mm |
79 Gs
7.9 mT
|
0.00 kg / 0.01 LBS
2.9 g / 0.0 N
|
safe |
| 30 mm |
27 Gs
2.7 mT
|
0.00 kg / 0.00 LBS
0.3 g / 0.0 N
|
safe |
| 50 mm |
7 Gs
0.7 mT
|
0.00 kg / 0.00 LBS
0.0 g / 0.0 N
|
safe |
Table 2: Slippage 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 LBS
552.0 g / 5.4 N
|
| 1 mm | Stal (~0.2) |
0.45 kg / 0.99 LBS
448.0 g / 4.4 N
|
| 2 mm | Stal (~0.2) |
0.33 kg / 0.74 LBS
334.0 g / 3.3 N
|
| 3 mm | Stal (~0.2) |
0.24 kg / 0.52 LBS
236.0 g / 2.3 N
|
| 5 mm | Stal (~0.2) |
0.10 kg / 0.23 LBS
104.0 g / 1.0 N
|
| 10 mm | Stal (~0.2) |
0.01 kg / 0.03 LBS
14.0 g / 0.1 N
|
| 15 mm | Stal (~0.2) |
0.00 kg / 0.00 LBS
2.0 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: Vertical assembly (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 LBS
828.0 g / 8.1 N
|
| Painted steel (standard) |
µ = 0.2
20% Nominalnej Siły
|
0.55 kg / 1.22 LBS
552.0 g / 5.4 N
|
| Oily/slippery steel |
µ = 0.1
10% Nominalnej Siły
|
0.28 kg / 0.61 LBS
276.0 g / 2.7 N
|
| Magnet with anti-slip rubber |
µ = 0.5
50% Nominalnej Siły
|
1.38 kg / 3.04 LBS
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 LBS
276.0 g / 2.7 N
|
| 1 mm |
|
0.69 kg / 1.52 LBS
690.0 g / 6.8 N
|
| 2 mm |
|
1.38 kg / 3.04 LBS
1380.0 g / 13.5 N
|
| 3 mm |
|
2.07 kg / 4.56 LBS
2070.0 g / 20.3 N
|
| 5 mm |
|
2.76 kg / 6.08 LBS
2760.0 g / 27.1 N
|
| 10 mm |
|
2.76 kg / 6.08 LBS
2760.0 g / 27.1 N
|
| 11 mm |
|
2.76 kg / 6.08 LBS
2760.0 g / 27.1 N
|
| 12 mm |
|
2.76 kg / 6.08 LBS
2760.0 g / 27.1 N
|
Table 5: Thermal resistance (material behavior) - 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 LBS
2760.0 g / 27.1 N
|
OK |
| 40 °C | -2.2% |
2.70 kg / 5.95 LBS
2699.3 g / 26.5 N
|
OK |
| 60 °C | -4.4% |
2.64 kg / 5.82 LBS
2638.6 g / 25.9 N
|
|
| 80 °C | -6.6% |
2.58 kg / 5.68 LBS
2577.8 g / 25.3 N
|
|
| 100 °C | -28.8% |
1.97 kg / 4.33 LBS
1965.1 g / 19.3 N
|
Table 6: Two magnets (repulsion) - field collision
MW 14x3 / N38
| Gap (mm) | Attraction (kg/lbs) (N-S) | Lateral Force (kg/lbs/g/N) | Repulsion (kg/lbs) (N-N) |
|---|---|---|---|
| 0 mm |
5.65 kg / 12.46 LBS
4 030 Gs
|
0.85 kg / 1.87 LBS
848 g / 8.3 N
|
N/A |
| 1 mm |
5.16 kg / 11.37 LBS
4 662 Gs
|
0.77 kg / 1.71 LBS
773 g / 7.6 N
|
4.64 kg / 10.23 LBS
~0 Gs
|
| 2 mm |
4.59 kg / 10.12 LBS
4 398 Gs
|
0.69 kg / 1.52 LBS
689 g / 6.8 N
|
4.13 kg / 9.11 LBS
~0 Gs
|
| 3 mm |
4.00 kg / 8.82 LBS
4 107 Gs
|
0.60 kg / 1.32 LBS
600 g / 5.9 N
|
3.60 kg / 7.94 LBS
~0 Gs
|
| 5 mm |
2.89 kg / 6.37 LBS
3 490 Gs
|
0.43 kg / 0.96 LBS
434 g / 4.3 N
|
2.60 kg / 5.74 LBS
~0 Gs
|
| 10 mm |
1.07 kg / 2.36 LBS
2 125 Gs
|
0.16 kg / 0.35 LBS
161 g / 1.6 N
|
0.96 kg / 2.12 LBS
~0 Gs
|
| 20 mm |
0.14 kg / 0.30 LBS
759 Gs
|
0.02 kg / 0.05 LBS
21 g / 0.2 N
|
0.12 kg / 0.27 LBS
~0 Gs
|
| 50 mm |
0.00 kg / 0.00 LBS
89 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
54 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
36 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
25 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
18 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
13 Gs
|
0.00 kg / 0.00 LBS
0 g / 0.0 N
|
0.00 kg / 0.00 LBS
~0 Gs
|
Table 7: Hazards (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 |
| Remote | 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: Impact energy (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: Electrical 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: 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. Wall mount (shear)
*Warning: On a vertical surface, the magnet retains merely approx. 20-30% of its nominal pull.
2. Steel saturation
*Thin metal sheet (e.g. computer case) drastically weakens the holding force.
3. Heat tolerance
*For N38 grade, 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.
Chemical composition
| 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 |
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Advantages and disadvantages of rare earth magnets.
Pros
- They do not lose magnetism, even over nearly 10 years – the reduction in power is only ~1% (based on measurements),
- They show high resistance to demagnetization induced by external field influence,
- By using a smooth coating of nickel, the element has an professional look,
- They feature high magnetic induction at the operating surface, which improves attraction properties,
- Through (adequate) combination of ingredients, they can achieve high thermal resistance, enabling action at temperatures approaching 230°C and above...
- Possibility of exact shaping and modifying to individual needs,
- Wide application in electronics industry – they serve a role in data components, brushless drives, advanced medical instruments, also industrial machines.
- Thanks to their power density, small magnets offer high operating force, occupying minimum space,
Weaknesses
- Brittleness is one of their disadvantages. Upon intense impact they can break. We advise keeping them in a strong case, which not only secures them against impacts but also raises their durability
- NdFeB magnets demagnetize when exposed to high temperatures. After reaching 80°C, many of them experience permanent drop of power (a factor is the shape and 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
- They rust in a humid environment - during use outdoors we suggest using waterproof magnets e.g. in rubber, plastic
- Due to limitations in creating threads and complex shapes in magnets, we recommend using a housing - magnetic mechanism.
- Potential hazard related to microscopic parts of magnets are risky, in case of ingestion, which becomes key in the aspect of protecting the youngest. Additionally, small components of these products are able to be problematic in diagnostics medical in case of swallowing.
- Due to complex production process, their price is higher than average,
Holding force characteristics
Detachment force of the magnet in optimal conditions – what contributes to it?
- using a plate made of mild steel, acting as a magnetic yoke
- with a cross-section no less than 10 mm
- with a plane cleaned and smooth
- under conditions of no distance (metal-to-metal)
- under perpendicular application of breakaway force (90-degree angle)
- at room temperature
Magnet lifting force in use – key factors
- Air gap (between the magnet and the plate), since even a microscopic clearance (e.g. 0.5 mm) leads to a decrease in force by up to 50% (this also applies to varnish, corrosion or debris).
- Force direction – catalog parameter refers to detachment vertically. When applying parallel force, the magnet holds much less (typically approx. 20-30% of nominal force).
- Substrate thickness – to utilize 100% power, the steel must be adequately massive. Paper-thin metal limits the lifting capacity (the magnet "punches through" it).
- Chemical composition of the base – low-carbon steel attracts best. Higher carbon content reduce magnetic permeability and lifting capacity.
- Surface quality – the more even the plate, the better the adhesion and stronger the hold. Unevenness acts like micro-gaps.
- Thermal environment – heating the magnet results in weakening of induction. Check the thermal limit for a given model.
Lifting capacity testing was conducted on plates with a smooth surface of suitable thickness, under a perpendicular pulling force, in contrast under parallel forces the lifting capacity is smaller. Additionally, even a small distance between the magnet’s surface and the plate decreases the holding force.
H&S for magnets
Electronic hazard
Avoid bringing magnets close to a purse, laptop, or TV. The magnetism can irreversibly ruin these devices and wipe information from cards.
Protective goggles
Watch out for shards. Magnets can explode upon uncontrolled impact, launching sharp fragments into the air. We recommend safety glasses.
Threat to navigation
A strong magnetic field disrupts the functioning of compasses in phones and GPS navigation. Keep magnets near a device to prevent breaking the sensors.
Thermal limits
Avoid heat. Neodymium magnets are sensitive to heat. If you require operation above 80°C, look for HT versions (H, SH, UH).
Warning for heart patients
People with a heart stimulator should maintain an absolute distance from magnets. The magnetic field can stop the operation of the life-saving device.
Powerful field
Use magnets consciously. Their huge power can shock even experienced users. Be vigilant and do not underestimate their force.
Do not give to children
Strictly store magnets out of reach of children. Choking hazard is high, and the consequences of magnets connecting inside the body are very dangerous.
Pinching danger
Watch your fingers. Two large magnets will snap together immediately with a force of several hundred kilograms, destroying anything in their path. Be careful!
Sensitization to coating
Some people have a hypersensitivity to nickel, which is the typical protective layer for NdFeB magnets. Extended handling may cause dermatitis. We suggest use protective gloves.
Do not drill into magnets
Drilling and cutting of neodymium magnets poses a fire risk. Magnetic powder reacts violently with oxygen and is difficult to extinguish.
